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    Service Manual EH1 chassis

    Colour Television Service Manual

    Give complete "SERVICE REF. NO." for parts orderor servicing, it is shown on the rating sheet on thecabinet back of the TV set.

    NoteThis TV receiver will not work properly in foreigncountries where the television transmission systemand power source differ from the design specifications.Refer to the specifications for the design specifications

    ContentsSafety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Service adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-13Component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-20Special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Waveforms & voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-27Service parts listsSchematic diagram

    Chassis: EH1-AModel:

    C28ER59 [Europe]C28ER59N [Europe]C28ER59NE [UK/Ireland]

    For further technical information, please refer to thetraining manual EH1 chassis, ref. No. TI520013.

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    -2-Service Manual EH1 chassis

    SAFETY PRECAUTION

    X-RADIATION PRECAUTION

    The primary source of X-RADIATION in the television receiver is the picture tube. The picture tube is speciallyconstructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube mustbe the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardousX-RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to thisservice manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits,take necessary corrective action. Carefully follow the instructions for +B1 volt power supply adjustment, and highvoltage adjustment to maintain the high voltage within the specified limits.

    PRODUCT SAFETY NOTICE

    Product safety should be considered when a component replacement is made in any area of a receiver.Components indicated by mark / /!\ in the parts list and the schematic diagram designate components in whichsafety can be of special significance. It is particularly recommended that only parts designated on the parts list inthis manual be used for component replacement designated by mark /! \ . No deviations from resistance wattageor voltage ratings may be made for replacement items designated by mark /! \ .

    1: An isolation transformer should be connected in thepower line between the receiver and the AC line when

    a service is performed on the primary of the convertertransformer of the set.2: Comply with all caution and safety-related notes

    provided on the cabinet back, inside the cabinet, onthe chassis or the picture tube.

    3: When replacing a chassis in the cabinet, always becertain that all the protective devices are installed

    properly, such as, control knobs, adjustment covers orshields, barriers, isolation resistor-capacitor networksetc.Before returning any television to the customer,the service technician must be sure that it iscompletely safe to operate without danger of electricalshock.

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    -3-Service Manual EH1 chassis

    This is a diagram for all models and therefore differs slightly from the actual block diagram.

    T u n e r

    I F

    s t a g e

    A 2 s t e r e o

    d e c o

    d e r

    N I C A M

    d e c o

    d e r

    A u d

    i o

    P r o c e s s o r

    3 D

    s u r r o u n d

    p r o c e s s o r

    A u d

    i o

    o u t p u t

    S p e a k e r s

    A V s e

    l e c t o r

    V i d e o

    c h r o m a

    d e f l e c t

    i o n

    d e m o d u l a t o r

    D o u

    b l e

    s c a n

    c o n v e r t e r

    V i d e o

    A p e r t u r e

    C o n

    t r o l

    &

    M a t r i x

    V i d e o

    o u t p u t

    S y s

    t e m

    C o n

    t r o l

    C P U

    m e m o r y

    t e l e t e x t

    d e c o

    d e r

    H / V s y n c .

    d r i v e r

    V e r

    t i c a l

    d r i v e

    &

    w a v e f o r m

    c o n t r o

    l l e r

    V e r

    t i c a l

    o u t p u t

    H o r

    i z o n

    t a l d r i v e

    & o u

    t p u t

    I 2 C b u s

    D / A

    H i g h - v o

    l t a g e

    C R

    T

    V o l u m e

    B a s s

    T r e

    b l e

    B a l a n c e

    M u t e

    A V m o d e

    I 2 C B u s c o n t r o l

    H - C e n

    t r i n g

    V - C e n

    t r i n g

    S I F c a r r

    i e r

    L , R

    L , R

    L , R

    L , R

    L , R

    L , R

    L , R

    A V 4 ( F r o n t

    )

    ( S c a r t )

    A V 1

    A V 4

    A V 3

    A V 2

    Y / C V B S

    C

    Y

    H / V s y n c

    R - Y

    B - Y

    2 Y 2 R - Y

    2 B - Y

    V D

    H D

    V D

    H - D r i v e

    V - d r i v e

    D Y

    R G B I K

    H . V

    R G B

    C o l o u r

    B r i g

    h t n e s s

    C o n

    t r a s

    t

    T i n t

    S h a r p n e s s

    CIRCUIT DESCRIPTION

    Outline

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    -4-Service Manual EH1 chassis

    This chassis consists of the tuner, IF detector, audiosignal processor, video signal processor, AV selector,double scan converter, vertical deflection, horizontaldeflection and system control circuit that controls all ofthe circuit on this chassis.The RF(radio Frequency) signal input to the tuner fromthe aerial is converted to the IF(Intermediate Frequency)signal in the tuner stage, and then, the composite video(CVBS) signal and the SIF carrier signal are extracted atthe IF detector circuit.The SIF carrier signal is applied to the A2 stereodemodulator circuit and Nicam stereo demodulator circuitrespectively. The A2 stereo demodulator detects the SIFsignal (5.5MHz=Main channel, 5.74MHz=Sub channel)input, and sends out the A2 stereo audio signals outputto the Nicam decoder circuit, and also judges that thereceiving signal is stereo or monaural, and sends out the

    result to the CPU via I 2C bus lines. The Nicam decoderdecodes the SIF signal (5.85MHz components) input andobtains the Nicam stereo audio signals output. This ICalso sends out the status (Nicam or not) to the CPU viathe I 2C bus lines. The obtained A2 stereo or Nicamstereo audio signals are selected by the CPU via the I 2Cbus and supplied to the audio processor circuit as TVaudio signal.

    In the video signal processing stage, video signal outputfrom the IF detector circuit is supplied to the AV selectorcircuit as TV video signal. The AV selector circuit selects

    the output video signal from the input signal of TV video,scart video and front video signal by the CPU via I 2Cbus. The selected video signal is sent to thevideo/chroma demodulator circuit. The video/chromademodulator demodulates the video signal or Y and Csignal and outputs the colour differential signal R-Y, B-Y,Y, H-sync and V-sync signal and supplies them to thedouble scan converter circuit.The double scan converted Y, R-Y and B-Y signals areapplied to the aperture control and RGB matrix circuit.The RGB original colour signal which are obtained at theRGB matrix circuit drive the video output circuit. Thisvideo output circuit also controls the automatic cut-off byfeeding back the AKB(Auto-Kine Bias) pulse on the RGBsignal during the vertical blanking period to the RGBmatrix and video control circuit.The H-sync and V-sync signals are applied to the H/Vsync driver circuit to generate the drive signals for eachoutput circuit. In the vertical signal control circuit, thevertical sawtooth signal applied to the vertical outputcircuit is waveform-shaped to compensate the rasterdistortion.

    On the other hand, the audio processor circuit selects theoutput audio signal from input signals of TV audio, front

    audio and scart audio by the CPU via I 2C bus. Theselected audio signals are sent to the 3D surroundprocessing circuit for adding the 3D surround effects.

    These signals are again input to the audio processor IC,and are controlled in volume, bass, treble, balance andsound mute by the CPU via I 2C bus. The controlled audiosignals are supplied to the audio output circuit to drivethe loudspeakers.

    Main signal flow

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    -5-Service Manual EH1 chassis

    Tu

    Q105

    X103SAW

    IC101

    Q112 Q1231

    Q1232

    IC1200 Q 1 2 0 4

    Q1201Q1207

    Q1202Q1208

    AV1 AV2 AV3 AV4

    IC801

    IC202 IC204 IC201

    Double ScanConverter

    VideoApertureControl &matrix

    Q 2 1 1

    Q 2 1 2

    Q 2 1 3

    Q711

    Q721

    Q731

    Q831Q832Q833

    IC206

    Q 8 3 6

    IC711

    IC721

    IC731

    35 8

    35 8

    35 8

    87 21

    48

    1

    9

    11

    13

    33

    40

    3745

    43

    25

    26

    14

    13

    12

    12

    34

    18192021

    1117

    V-sync

    H-sync

    YR-Y

    B-Y

    Y/CVBS

    C

    CVBS

    Video

    V

    Y

    C

    T V - o u t

    Video

    Video

    R-YB-Y

    R-YB-Y

    1614

    1211

    R,G,B,BLK

    AV2-R,G,B

    AV2-BLK

    R,G,B

    TeletextOSD R,G,B

    131211

    10

    678

    15

    234

    13

    11

    10 12

    IC207

    11

    BLK

    10 12

    14

    9

    5

    BLK

    H - s y n c

    V - s y n c

    Y R - Y

    B - Y

    2Y

    2R-Y

    2B-Y

    R

    G

    B

    IK

    BLK

    RGB

    2324

    35343332

    M o n

    i t o r - o u

    t

    VR1201

    (Front)

    30

    4.43MHzosc.

    IF

    CPU

    AV Selector

    VideoChromaDef.

    RGBSW

    Video Out

    CVBS

    Video signal rooting

    TuX102

    IC101IF

    Q10765 22

    Q3483Q3484

    Q3483Q3484

    Q3432

    Q3431

    5.5MHz

    5.74MHz

    1

    15

    8

    7

    7

    8

    14

    13

    16

    7

    29

    8

    153

    5

    9

    24

    1

    2313

    115

    3

    14

    8

    10

    23

    18

    15

    2 4 7 12

    1

    32

    28

    30

    AV Selector Circuit

    BACK BOARD

    L R

    L

    R

    L

    R

    FRONT AV

    SCART

    IC3431Audio Processor

    IC35313D Surround

    Processor

    IC3521Equaliser

    IC001Audio Output

    IC3800A2 Stereo

    Sound Demo.

    IC3401A2 Stereo

    FM DecoderIC3451

    NICAM Decoder

    AF1

    AF2

    L

    R

    L

    R

    RR

    L L

    R

    L

    L

    R

    L

    R

    SIF carrier

    Main

    Sub

    I2C BUS

    I2C BUS

    20 14950

    1617

    From CPU

    Audio signal rooting

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    -6-Service Manual EH1 chassis

    IC1200CXA1855S

    BACK BORAD

    44AV selector

    IC2351CXD2018QP

    IC2201AN5390FBS

    IC2101AN5395FBP

    IC2206LA6393M

    IC2203TC74HC123AF

    IC2205TC7WH74FU

    IC2202TC7W04F

    IC2102CXA1315P

    IC675

    B5V

    IC2341MC74HC74AF

    IC2351CXD2018QP

    IC2361LA6358M

    IC801QXXAV8079

    IC80224LC04

    IC207M74L532P

    IC7213CXD2000Q

    IC7203 IC7204 IC7205 IC7206

    IC7207 IC7208 IC7209 IC7211IC7212 IC7215 IC7221 IC7222IC7223

    IC3401TDA9840

    IC3800TDA9821

    IC3451SAA7283

    Tuner IC101LA7577NIC350LA7210

    IC2391LA6458M

    IC205MC74HC74AN

    IC206MC74HC04AN

    IC2371LA6458M

    IC2381LA6458M

    IC7201TLC5733IPM

    IC7214QXXAAC2138

    5V8V

    IC001TA8216H

    5V

    Q681

    RC5V

    IC361UPC1377C

    IC2311LA6393M

    IC2331CXA1315P

    IC677

    D5V 5V

    IC672

    A5V 5V

    24V

    IC7301

    5V

    IC676

    B9V 9V15V

    IC674

    A12V 12V

    P O W E R S U P P L Y

    C I R C U I T

    Memory

    44

    39

    14

    8

    14 V-Driver 8

    21 8 16 8 8 8

    4 4 4H/V sync.det. I2C bus D/A

    CPU

    59 8 16 8 8VideoSharpness

    19 16

    I2C bus D/AMatrix&controller

    1 2 V

    - 1 2 V

    SUB DEF. BOARD

    VIDEO BOARD

    DOUBLE SCAN CONVERTER BOARD

    Logic ICs7314,2630,3551,62

    8bit A/D converter

    30,3242,43 D/A converter

    Double scanconverter

    14

    14

    18 14 3,26,36

    A2 stereo decoder NICAM stereo decoder

    9 9

    IF demodulator Sync. detector

    FRONT BOARD

    C9V 9V

    IC678

    IC3531MM1369AD

    IC3521M5228P

    Tuning voltage

    IC202TDA9143

    IC203LA6393

    IC201TDA8601

    IC204TDA4665

    IC3431TDA9860

    Horiz.Drive &Output Circuit

    IC673

    A8V 8V

    35V

    IC671

    A9V 9V

    1 5 V

    IC652

    A12V 12V

    P O W E R S U P P L Y

    C I R C U I T

    5V

    IC711TDA6111Q

    IC721TDA6111Q

    IC731TDA6111Q

    IC653

    -12V -12V-16V

    137V

    IC501LA7846N

    High Voltage

    CRTHeater

    65V

    200V

    15V

    -15V

    33V

    T403

    T402

    472

    V-Output

    66 6

    222 Video Output

    CRT BOARD

    424

    7 8 1 6 1, 9

    3D surround

    Soundcontroller

    RGB selectorVideo/chroma/def.

    1H delay 1 2 V

    - 1 2 V

    To Sub Def. Board

    Power supply rooting

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    -8-Service Manual EH1 chassis

    DISASSEMBLY

    CABINET BACK DISASSEMBLY

    1. Remove 10 screws(A) and 4 screews(B)2. Pull out the cabinet back.

    PLACING THE CHASSIS TO SERVICEPOSITION

    1. Remove 2 screws (C).2. Release the wires at hooks(D) and hooks(E).3. Remove an AC cord holder(F).4. Turn the chassis to the service position as

    shown in the picture.5. Fix the chassis with a screw(C)

    (C)

    (A)

    (B)

    (C)(C) (E)

    (D)

    AC cordholder(F)

    (B)

    (A)

    (A)

    (A)

    (A) (A)

    (A)

    (A)

    (A)

    (A)

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    SERVICE ADJUSTMENTS

    [After replacing the Menory IC (IC802)]

    The memory IC, IC802, stores the service adjustments data for each circuit, therefore, when the memory IC isreplaced, it should be readjusted the following adjustments and confirmed initial data value, refer to the adjustmenttable on next page.

    Adjustments Service ModeStereo separation adjustment Item 000, Item 001Vertical Centring Item 005Vertical Height Item 006Horizontal Centring Item 009Horizontal Width Item 010White Balance Item 034, Item 035DCS Gain Item 057Auto Setup Option setting Item 069

    Enter to the Service Mode

    s Press and hold the Function button on the RC handset and then press the Prog + button on the TV set.

    + To select the adjustment item, use the Prog+ or Prog- button. The selected item is indicated in red.+ To change the service data, use the Level - or Level + button.+ The data which is set in the service mode is stored into the memory IC automatically.

    Exit from the Service Mode

    s Turn off the TV set by using the Mains switch.

    ADJUST DATA

    +000 K1 +001+001 K2 -006+003 STID +000

    ADJUST DATA

    +000 K1 +001+001 K2 -006+003 STID +000

    Item service data

    Note: Some items of the service adjustments for this chassis are controlled by the CPU, IC801, and theadjustments are carried out by using the RC handset.

    -9-Service Manual EH1 chassis

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    -10-Service Manual EH1 chassis

    Adjust. items Initial value Status Description+000 K1 +000 ADJSTBL Signal level adjustment for A2 stereo, 500mVrms at 54% dev. on pin 1 of SCART 1+001 K2 -006 ADJSTBL Separation adjustment for A2 stereo, minimise R signal on pin 3 of SCART 1+002 STID +000 Fixed Judgement algolizum for A2 stereo, 0: FAST 1:NORMAL 2:FAST -> NORMAL+003 ATT +004 Fixed Sound level adjustment between A2 stereo and NICAM stereo decoded output

    +004 VFreq +130 Fixed Not used+005 VCent +086 ADJSTBL Vertical centre adjustment for 50Hz+006 VSize +028 ADJSTBL Vertical size adjustment for 50Hz+007 SCore +010 RECOMD Vertical linearity adjustment (centre, top/bottom part), common data of 50/60Hz+008 VLner +009 RECOMD Vertical linearity adjustment (top and bottom part), common data of 50/60Hz+009 HCent +175 ADJSTBL Horizontal centre adjustment for 50Hz+010 HSize +032 ADJSTBL Horizontal width adjustment for 50Hz+011 PinAmp +023 RECOMD Horizontal pincushion adjustment for 50Hz+012 Tilt +022 RECOMD Trapezoid distortion correction adjustment for 50Hz+013 UCoPin +010 RECOMD Upper corner pincushion adjustment, common data of 50/60Hz+014 LCoPin +010 RECOMD Lower corner pincushion adjustment, common data of 50/60Hz+015 VBow +011 RECOMD Vertical line correction adjustment, common data of 50/60Hz+016 VAngle +007 RECOMD Parallelogram distortion correction adjustment for 50Hz+017 HVCmpV +007 Fixed Vertical size correction due to beam current, common data of 50Hz/60Hz

    +018 HVCmpH +007 Fixed Horizontal width correction due to beam current, common data of 50/60Hz+019 VFreq60 +000 Fixed Setting of vertical osc. frequency for 60Hz (Not used)+020 VCent60 -002 Fixed Vertical centre adjustment for 60Hz (difference to ITEM 5)+021 VC16950 +000 Fixed Vertical centre adjustment on 16:9 mode for 50Hz (difference to ITEM 5)+00+022 VC16960 +000 Fixed Vertical centre adjustment on 16:9 mode for 60Hz (difference to ITEM 5)+023 VSize60 +000 Fixed Vertical size adjustment for 60Hz (difference to ITEM 6)+024 VS16950 +000 Fixed Vertical size adjustment on 16:9 mode for 50Hz (difference to ITEM 6)+025 HCent60 +003 Fixed Horizontal centre adjustment for 60Hz (difference to ITEM 9)+026 HCentTX -010 Fixed Horizontal centre adjustment on teletext mode (difference to ITEM 9)+027 HSize60 +002 Fixed Horizontal width adjustment for 60Hz (difference to ITEM 10)+028 PinAmp60 +001 Fixed Horizontal pincushion adjustment for 60Hz (difference to ITEM11)+029 Tilt60 +003 Fixed Trapezoid distortion correction for 60Hz (difference to ITEM12)+030 Colour +023 Fixed Sub colour setting+031 TintAN +069 Fixed Tint setting for AN5390+032 Cont +027 Fixed Sub contrast setting+033 Bright +022 Fixed Sub brightness setting+034 DriveR +152 ADJSTBL R-drive adjustment of white-balance+035 DriveB +160 ADJSTBL B-drive adjustment of white-balance+036 CutofG +050 RECOMD G-cut off adjustment of white-balance+037 CutofR +063 RECOMD R-cut off adjustment of white-balance+038 CutofB +042 RECOMD B-cut off adjustment of white-balance+039 BYGinPA +035 Fixed B-Y gain setting (PAL)+040 RYAnglPA +000 Fixed R-Y angle setting (PAL)+041 MatrxPA +003 Fixed G-Y matrix ratio setting (PAL)+042 BYGinNT +037 Fixed B-Y gain setting (NTSC)+043 RYAnglNT +000 Fixed R-Y angle setting (NTSC)+044 MatrxNT +002 Fixed G-Y matrix ratio setting (NTSC)+045 BYGinSE +037 Fixed B-Y gain setting (SECAM)+046 RYAnglSE +000 Fixed R-Y angle setting (SECAM)+047 MatrxSE +002 Fixed G-Y matrix ratio setting (SECAM)+048 TintSW +009 Fixed Tint setting fro AN5390+049 ABLACL* +000 Fixed ABL/ACL defeat switch and other setting+050 Black +104 Fixed Setting of operational point and gain for black expansion function+051 Gamma +240 Fixed Setting of gamma compensation (o: minimum, 240: maximum)+052 White +032 Fixed Setting of slice level for white peak and adder value to B signal+053 ABL +095 Fixed Setting of ABL operational point and gain+054 ACL +207 Fixed Setting of ACL operational point and gain+055 VMGain +012 Fixed Gain setting of VM+056 SW12 +000 Fixed Y/C delay value setting for AN5390+057 DCSGain +220 ADJSTBL Gain setting of DSC+058 Sharp +004 Fixed Sub sharpness adjustment

    +059 DGain +120 Fixed Sharpness setting of small signal part+060 DCore +125 Fixed Coring setting of Dgain+061 DCoreSNR +000 Fixed Change Dcore value according to TDA9143 noise detection (0: No correction)+062 Sepetn +100 Fixed Setting of Dgain and aperture control value

    Adjustment Items and data Table

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    -11-Service Manual EH1 chassis

    +063 Xtal +002 Fixed Xtal setting, 0:3.58+3.58, 1:3.58, 2:4.43, 3:4.43+3.58+064 System +224 Fixed Sub address setting 01 of TDA9134+065 TintTDA +016 Fixed Tint setting of TDA9143+066 YDelyPA +010 Fixed Y/C phase setting for PAL (sub address setting 18 of TDA9143)+067 YDelyNT +010 Fixed Y/C phase setting for NTSC (sub address setting 18 of TDA9143)+068 YDelySE +010 Fixed Y/C phase setting for SECAM (sub address setting 18 of TDA9143)+069 Country +001 ADJSTBL 0: auto search 1: ATS

    +070 WideOpt +001 Fixed 0: 16:9 mode off 1: 16:9 mode on+071 TxBrit +040 Fixed Black level setting of teletext mode+072 TxCont +062 Fixed Contrast setting of teletext

    Notes:+ The initial value that the CPU writes down the CPU ROM data to the memory when replaced the memory IC. TV

    set does not operate correctly with this initial value.+ The items which are shown with fixed in the status column in the table above are preset by factory as standard.

    So do not change value otherwise the set may not operate properly.+ The items which are shown with RECOMD are normally not requied for re-adjustment but it may change the value

    to implove the performance.+ The items which are shown with ADJSTBL should be re-adjusted following steps.

    STEREO SEPARATION ADJUSTMENT1. Enter to the service mode.2. Select item 000 and set data to +000, select item 001

    and set data to -006.

    VERTICAL CENTRING ADJUSTMENT1. Receive circular pattern.2. Enter to the service mode.3. Select Item 5 and adjust the vertical centre.

    VERTICAL HEIGHT ADJUSTMENT1. Receive circular pattern.2. Enter to the service mode.3. Select Item 6 and adjust the vertical height.

    HORIZONTAL CENTRING ADJUSTMENT1. Receive circular pattern.2. Enter to the service mode.3. Select Item 9 and adjust the horizontal centre.

    HORIZONTAL WIDTH ADJUSTMENT1. Receive circular pattern.2. Enter to the service mode.3. Select Item 10 and adjust the horizontal width.

    WHITE BALANCE ADJUSTMENT1. Receive white pattern.2. Enter to the service mode.3. Adjust white balance using the following items,

    Item 034 R drive adjustmentItem 035 B drive adjustment

    DCS GAIN ADJUSTMENT1. Enter to the service mode.2. Select item 059 and set data to 100.

    AUTO SETUP OPTION SETTING1. Enter to the service mode.2. Select item 057 and set data as follows;

    Value +000 : Auto search mode for UK and IrelandValue +001 : ATS mode for W. Europe countries.

    SERVICE ADJUSTMENTS-1

    After replacing the memory IC, IC802, folllowing service adjustments must be carried out.

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    -12-Service Manual EH1 chassis

    VCO ADJUSTMENT1. Receive the circular pattern.2. Adjust the picture to obtain the best picture by using

    T103.

    B1 POWER SUPPLY ADJUSTMENT1. Set VR641 to be mechanical centre before pressing

    the main switch.2. Receive the circular pattern.3. Set brightness and contrast controls to normal.4. Connect digital V-meter to TP453 on the sub/def.

    board.5. Adjust voltage to be 1370.5V DC by using VR641 on

    the sub/def. board.

    AFT ADJUSTMENT1. Receive the clearest station.2. Adjust AFT to obtain the best picture by using T102.

    AGC ADJUSTMENTNOTE: Do not attempt this adjustment with weak signal.1. Receive the clearest station.2. Set AGC VR(VR101) in direction which causes snow

    noise to appear, then in the opposite direction untilsnow noise just disappears.

    FM DETECTOR ADJUSTMENT(UK/Ireland only)1. Receive the monaural station of system I.2. Connect voltmetre between TPC and TPE.3. Adjust the voltage to be 6.00.2V DC by using T101.

    PILOT ADJUSTMENT(Europe only)1. Receive the A2 stereo signal

    Carrier :5.5MHz + 5.74MHz

    Deviation :27kHz2. Connect oscilloscope between TP34A(pin 5 of IC3401)

    and TP34E.3. Adjust the amplitude to be maximum by using T3401.

    VIDEO AMPLITUDE ADJUSTMENT(Europe only)1. Receive the PAL colour bar pattern.2. Connect oscilloscope between JT1201(+) and

    JT1201E(-) on the back board.3. Adjust the video amplitude to be 1.0Vp-p0.05V by

    using VR1201 on the back board.

    DOUBLE SCAN ADJUSTMENTReceive the PAL colour bar pattern. Adjustment points

    are on the double scan borad.

    [PLL ADJUSTMENT]1. Connect oscilloscope between C7226-(TPOSC)(+)

    and GND(-).2. Adjust voltage to be 2.5V DC by using T7201.

    [CLAMP ADJUSTMENT]1. Connect voltmetre between pin 52 of IC7201(+) and

    pin 48 of IC7201(-).2. Adjust voltage to be 2.0V DC by using VR7201.

    [OUTPUT LEVEL ADJUSTMENT-Y]1. Connect oscilloscope between pin 6 of K73C(+) and

    GND(-).2. Adjust the Y signal amplitude to be 0.7Vp-p by using

    VR7351.

    0.7Vp-p

    2.5V DC

    DC=0

    1.0Vp-p

    100% white level

    SERVICE ADJUSTMENTS-2

    Please refer to the Component Locations for the adjustments and test points.

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    -13-Service Manual EH1 chassis

    [OUTPUT LEVEL ADJUSTMENT-R-Y]1. Connect oscilloscope between pin 10 of K73C(+) and

    GND(-).2. Adjust the R-Y signal amplitude to be 0.7Vp-p by using

    VR7352.

    [OUTPUT LEVEL ADJUSTMENT-B-Y]1. Connect oscilloscope between pin 8 of K73C(+) and

    GND(-).2. Adjust the B-Y signal amplitude to be 0.7Vp-p by using

    VR7353.

    SCREEN ADJUSTMENT1. Receive the PAL colour bar pattern.2. Connect oscilloscope between JTP47G(+) and

    JTP47E(-) on the CRT unit.3. Adjust colour control to minimum, brightness to centre

    and contrast to minimum.4. Adjust the black level to be 165V DC5V by using

    SCREEN VR on the FBT.

    HIGH VOLTAGE CONFIRMATION1. Receive the white pattern.2. Set brightness and contrast controls to maximum.3. Connect digital V-meter between TP451 and

    TP452, and high voltage meter to CRT anode.4. Confirm high voltage to be 28.5 1 KV at beam

    current 1.8, and less than 32.5 KV at 0 beam current.

    FOCUS ADJUSTMENTBy using FOCUS VR, adjust focus control for welldefined scanning lines.

    165V DC

    DC=0

    Black level

    0.7Vp-p

    0.7Vp-p

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    -14-Service Manual EH1 chassis

    MAIN BOARD (Component side)

    A 1 0 1

    A

    I C 1 0 1

    IC

    I C 2 0 4

    IC

    I C 2 0 2

    IC

    I C 3 4 5 1

    IC

    I C 3 4 0 1

    IC

    I C 3 8 0 0

    IC

    I C 2 0 1

    IC

    S C A N

    C ON V E R T E R

    U N I T

    S

    C

    N

    U

    T

    I C 2 0 5

    IC

    K 2 P O

    K

    PO

    K 2 V I

    K

    V

    K 2 P L

    K

    P

    K 2 K K

    K

    K 2 L K

    K2W2WK2Y2Y

    I C 3 4 3 1

    ICI C 3 5 3 1

    ICI C 3 5 0 0

    IC

    I C 8 0 1

    IC

    IC3521C3521

    I C 6 7 4

    I C 6 7 8

    T P A

    T P E

    A 1 0 1

    T P D

    V R 1 0 1

    A G C T 1 0 1

    T 1

    0 2 I C 1 0 1

    T 1 0 3

    I C 2

    0 4

    I C 2 0 2

    I C 3 4 5 1

    I C 3 4 0 1

    I C 3 8 0 0

    T P

    3 4 A

    T 3 4 0 1

    I C 2 0 1

    I C 2 0 7

    I C 6 7 3

    S C A N

    C ON V E R T E R

    U N I T

    I C 2 0 5

    I C 2 0 6 V I D

    E O U N I T

    TP2CTP2BTP2A

    K 2 P

    O

    K 2 V I

    K 2 P L

    K 2 K

    K 2 L

    K2WK2Y

    I C 6 7 7

    I C 3 4 3 1

    I C 3 5 3 1

    I C 3 5 0 0

    I C 6 7 1

    I C 3 5 0

    I C 8 0 2 I C

    8 0 1

    IC3521

    I C 0 0 1

    I C 6 7 5

    I C 6 7 6

    T P

    C

    T P

    3 4 E

    I C 2

    0 3

    A F T

    P I L

    OT

    V C O

    A G C

    F M

    COMPONENTLOCATIONS

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    -15-Service Manual EH1 chassis

    MAIN BOARD (Circuit side)

    A 1 0 1

    Q1 0 3 Q1 0 2

    Q1 0 1

    Q1 0 4

    Q1 1 4

    Q1 1 5

    Q1 1 2

    Q1 1 1

    Q1 3 1

    Q1 0 7

    I C 1 0 1

    Q2 1 1 Q2 1 2 Q

    2 1 3

    I C 2 0 2

    I C 2 0 4

    Q2 1 4

    I C 2 0 6

    I C 3 4 5 1

    Q 3 4 8 3

    Q 3 4 8 1

    Q 3 4 1 2

    Q 3 4 1 1

    Q 3 4 8 2

    I C 0 0 1

    I C 3 5 2 1

    Q 3 4 3 1

    I C 3 4 3 1

    Q 3 4 3 2

    I C 3 5 3 1

    I C 3 5 0 0

    Q 8 7 3

    Q 8 5 1 I C

    8 0 1 Q 8 0 4

    Q 8 0 3

    Q 8 0 2

    I C 3 8 0 0

    I C 3 4 0 1

    I C 2 0 1

    I C 2 0 7

    I C 2 0 5

    Q 8 3 5

    Q 8 3 6

    Q 8 3 1

    Q 8 3 2

    Q 8 3 3

    Q 3 4 8 4

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    -16-Service Manual EH1 chassis

    I C 6 5 2

    V R

    6 4 1

    Q 6 4 1

    Q 6 6 1

    Q 6 6 4

    D 6 1 5

    Q 6 1 1

    Q 6 1 2

    Q 6 1 3

    T 6 1 1

    C onv er t er

    t r an s .

    T 4 0 3

    C h ok

    e t r an s .

    T 4 0 2

    F l y b a c k

    t r an s .

    I C 6 5 3

    Q4 2 2

    Q4 7 4

    I C 5 0 1

    V er t i c al

    o u t p u t

    Q 5 7 2 Q

    5 5 5 Q 5 5 4

    Q 5 5 6

    Q4 6 1

    Q4 7 3

    Q4 7 2

    Q4 7 1

    Q4 0 1

    H or i z on t al o u t p u t

    Q4 3 1

    I C 4 3 1

    Q4 0 2

    LIVE SIDE

    +B V

    OL T

    T P 4 E

    T P 4 5 3

    T P 4 5 2

    T P 4 5 1

    S C R E E

    N

    POWER DEF BOARD (Component side)

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    -17-Service Manual EH1 chassis

    K23N K23M

    J23HW

    H-SIZESW

    IC2331

    IC361

    VR391H-OSC

    Q2314

    Q2312

    IC2201

    IC2101

    IC2203IC2102

    IC2206

    IC2204

    IC2202

    IC2205

    Q2207

    Q2206

    Q2204

    Q2205

    Q1751

    Q2202 Q1752

    Q1753

    Q1755

    Q2105Q2106Q2110

    Q2109

    Q2108 Q2107

    Q2161

    Q2102 Q2101

    Q2103

    Q2104

    Q2201

    K20PL K20VI K20PO

    SUB DEF BOARD (Component side)

    VIDEO BOARD (Component side)

    IC2351

    IC2341

    IC2311

    IC2371 IC2391

    IC2381

    IC2361

    Q2341Q364

    Q2313

    Q361

    Q2311

    SUB DEF BOARD (Circuit side)

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    -18-Service Manual EH1 chassis

    IC7203

    IC7204

    IC7201

    VR7201REF TOP

    Q7304Q7338

    Q7308

    Q7301

    Q7307

    Q7306

    Q7359 Q7355 Q7351

    IC7223

    IC7206

    IC7222

    IC2101

    Q7360

    Q7362 Q7361

    VR7353

    Q7356

    Q7358 Q7357

    VR7352

    Q7352

    Q7354 Q7353

    VR7351

    IC7215

    IC7212

    IC7207

    IC7214

    IC7301

    K73AK73CK73B

    T7201

    CLAMP

    PLL

    R-Y

    B-Y

    Y

    DOUBLE SCAN BOARD (Component side)

    IC7211

    IC7208

    IC7205 IC7209 Q7201 IC7202

    DOUBLE SCAN BOARD (Circuit side)

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    -19-Service Manual EH1 chassis

    K1001

    K1002

    K1003

    VR1201Video Level

    Q1231

    Q1232

    Q1002Q1205

    Q1206Q1203

    Q1204Q1202

    Q1208

    Q1201

    Q1207

    IC1201

    Q1001

    K10Y K10W

    JT1201

    J T 1 2 0 1 E

    VIDEO AMP

    Q702Q703

    Q721

    Q701

    Q731

    Q711

    IC711B-OUT

    IC721G-OUT

    IC731R-OUT

    K701

    JTP47E

    JTP47G

    BACK BOARD (Component side)

    CRT BOARD (Component side)

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    -20-Service Manual EH1 chassis

    T 6 0 2

    T

    T 6 8 1

    T

    S W

    6 0 1

    M ai n s S Wi t c h

    F 6 0 1

    F u s e A 1 9 0 1

    S W1 9 0 1

    S W1 9 0 2

    S W1 9 0 3

    S W1 9 0 4

    P r o g +P r o g-

    V ol +

    V ol -

    F / MP T

    S Y

    S

    T 6 0 2

    T 6 8 1

    S W1 9 0

    5 S W1 9 0 6

    S W1 9 0 7

    Q 6 8 2

    Q 6 8 8

    Q1 1 1 1

    Q1 1 2 1

    Q1 1 3 1

    K 1 1 0 1

    K 0 0 1

    FRONT BOARD (Component side)

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    -21-Service Manual EH1 chassis

    This TV set allows you to set up the following specialfunctions.

    s Maximum volume setting and prohibition of presetting

    ITEM-1Sets the current volume as the maximum volume level and

    prohibition of presetting.

    SET 0 NOSET 1 YES

    s Start up programme position

    ITEM-2Presets the programme position when the set is switched on.

    SET 0 Last programme position startSET 1 Programme position "1" startSET 2 Programme position "2" startSET 3 Programme position "3" startSET 4 Programme position "4" startSET 5 Programme position "5" startSET 6 Programme position "6" startSET 7 Programme position "7" startSET 8 Programme position "8" startSET 9 "AV1" start

    SETTING PROCEDURE

    1 Press and hold the button on the Remote controlhandset and then press the Pv button on the TV set .

    2To select the "ITEM" number, press the button on

    the remote control handset .

    3 To select the "SET" number,press the orbutton repeatedly.4 To return to the normal TV mode, press thebutton .

    i The setting conditions of all items can be confirmed.i Special functions are not cancelled if the TV set is switched

    off or the mains disconnected.i

    This mode is not available whilst in the AV mode.

    F

    ITEM-1 SET->0

    SPECIALFUNCTIONS

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    -22-Service Manual EH1 chassis

    WAVEFORMS & VOLTAGES

    On the CRT Boa rd

    TP47B

    50V/div. 10 s/div.

    DC=0V

    TP47R

    50V/div. 10 s/div.

    DC=0V

    TP47G

    50V/div. 10 s/div.

    DC=0V

    Q711E 3.6VC 0VB 3.0V

    Q721E 3.6VC 0VB 3.0V

    Q731E 3.7VC 0VB 3.1V

    IC7111 3.3V 2 12.2V 3 3.3V 4 0V 5 6.4V 6 210V 7 138V 8 138V 9 137V

    IC7211 3.3V 2 12.1V 3 3.3V 4 0V 5 6.4V 6 210V 7 141V 8 142V 9 140V

    IC731

    1 3.3V 2 12.1V 3 3.3V 4 0V 5 6.5V 6 210V 7 135V 8 136V 9 134V

    On the Main Board(1)

    IC0011 1.6V 2 0V 3 0V 4 0V 5 1.5V 6 9.4V 7 13.2V 8 5.0V 9 27.7V

    10 0V 11 5.0V 12 12.7V

    IC1011 11.1V 2 5.7V 3 6.8V 4 4.6V 5 4.7V 6 4.6V 7 0V 8 3.7V 9 12.1V

    10 9.0V 11 4.1V 12 4.2V 13 6.8V 14 7.0V 15 11.2V 16 11.3V 17 4.6V 18 5.3V19 4.7V 20 5.3V 21 5.3V 22 10.1V 23 5.1V 24 2.0V

    IC2011 8.1V 2 2.3V 3 2.3V 4 2.4V 5 4.1V 6 3.8V 7 2.3V 8 5.1V 9 0V

    10 2.3V 11 2.2V 12 2.2V 13 0.7V 14 1.0V 15 0V 16 0.4V

    On the Front Boa rd

    Q681E 5.1VC 15.3VB 5.8V

    Q682E 5.0VC 5.1VB 5.6V

    Q1111E 4.5VC 12.2VB 5.1V

    Q1121E 4.5VC 12.2VB 5.1V

    Q1131E 4.5VC 12.2VB 5.1V

    K7D-6

    1V/div. 10 s/div.

    DC=0V

    K7D-4

    50V/div. 10 s/div.

    DC=0V

    K7D-5

    1V/div. 10 s/div.

    DC=0V

    TPIK

    2V/div. 10 s/div.

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    -23-Service Manual EH1 chassis

    On the Main Board(2)

    IC2021 0V 2 2.1V 3 2.4V 4 2.4V 5 4.1V 6 3.8V 7 8.0V 8 5.1V 9 0V

    10 1.8V 11 0V 12 3.3V 13 2.6V 14 2.5V 15 0V 16 2.5V 17 0.3V 18 0.7V19 5.1V 20 5.0V 21 5.0V 22 3.3V 23 0.1V 24 4.0V 25 0V 26 3.8V 27 0V28 3.5V 29 5.0V 30 2.5V 31 2.7V 32 0V

    IC2031 0V 2 0V 3 0V 4 0V 5 1.1V 6 3.2V 7 0.4V 8 8.0V

    IC2041 5.1V 2 0V 3 0V 4 0V 5 7.1V 6 0V 7 4.2V 8 0V 9 5.2V

    10 0V 11 2.9V 12 2.9V 13 0V 14 1.4V 15 0V 16 1.3VIC205

    1 5.1V 2 0V 3 0.2V 4 5.0V 5 0V 6 5.0V 7 0V 8 5.1V 9 0V10 5.0V 11 0.2V 12 0V 13 5.1V 14 5.1V

    IC2061 4.8V 2 0.2V 3 0.2V 4 4.8V 5 4.8V 6 0.2V 7 0V 8 5.0V 9 0V

    10 4.8V 11 0.3V 12 5.0V 13 0V 14 5.1V

    IC2071 0V 2 0V 3 0.1V 4 0V 5 4.8V 6 0V 7 0V 8 0.9 9 1.2V

    10 0V 11 0.9V 12 0V 13 1.2V 14 5.1V

    IC3501 9.9V 2 9.4V 3 9.4V 4 5.7V 5 0V 6 9.6V 7 0.3V 8 10.8V 9 12.1V

    10 0V

    IC671 IC672 IC6731 14.9V 2 0V 3 9.0V 1 8.1V 2 0V 3 5.1V 1 11.1V 2 0V 3 8.0V

    IC674 IC675 IC6761 15.2V 2 0V 3 12.2V 1 9.1V 2 0V 3 5.1V 1 12.3V 2 0V 3 9.1V

    IC6781 12.1V 2 0V 3 9.2V

    IC8011 0.6V 2 0V 3 0V 4 0.6V 5 5.0V 6 5.0V 7 5.1V 8 0.1V 9 2.5V

    10 0.6V 11 3.7V 12 3.1V 13 0V 14 0.1V 15 5.2V 16 5.1V 17 0.1V 18 0V19 5.1V 20 3.3V 21 0.1V 22 0V 23 2.1V 24 0.1V 25 2.0V 26 2.5V 27 0V28 0V 29 5.0V 30 0V 31 2.1V 32 0V 33 0V 34 0V 35 0V 36 0.3V37 0.1V 38 5.0V 39 5.0V 40 0.1V 41 2.4V 42 2.7V 43 0V 44 5.1V 45 4.6V46 0V 47 5.0V 48 5.0V 49 4.1V 50 3.6V 51 5.1V 52 5.1V

    IC8021 0V 2 0V 3 0V 4 0V 5 5.1V 6 5.1V 7 0V 8 5.1V

    IC34011 3.8V 2 3.4V 3 2.7V 4 2.7V 5 2.6V 6 2.6V 7 2.5V 8 2.5V 9 2.6V10 2.5V 11 2.5V 12 2.5V 13 2.5V 14 2.5V 15 2.5V 16 0V 17 2.5V 18 5.1V19 3.4V 20 4.0V

    IC34311 4.1V 2 0.1V 3 4.0V 4 8.1V 5 4.0V 6 8.0V 7 4.0V 8 0V 9 4.0V

    10 4.0V 11 4.0V 12 4.0V 13 4.0V 14 4.0V 15 4.0V 16 4.0V 17 3.7V 18 4.0V19 4.0V 20 4.0V 21 4.0V 22 4.0V 23 4.0V 24 4.0V 25 0V 26 4.0V 27 4.0V28 4.0V 29 4.0V 30 4.0V 31 0.1V 32 4.0V

    IC34511 0V 2 2.4V 3 5.0V 4 0V 5 2.5V 6 2.5V 7 2.6V 8 2.5V 9 0V

    10 0V 11 2.5V 12 0V 13 0V 14 0V 15 2.5V 16 2.5V 17 2.5V 18 4.8V19 0V 20 2.5V 21 2.6V 22 2.5V 23 2.5V 24 0V 25 2.6V 26 5.0V 27 2.5V

    28 2.5V 29 2.5V 30 2.6V 31 2.5V 32 2.3V 33 2.5V 34 2.5V 35 2.5V 36 5.1V37 0V 38 5.1V 39 4.3V 40 3.6V 41 2.6V 42 0V 43 0.9V 44 0V 45 2.6V46 5.0V 47 4.7V 48 0.9 V 49 4.0V 50 4.0V 51 5.0V 52 0V

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    -25-Service Manual EH1 chassis

    On the Powe r/ Def. Boa rd

    IC652 IC6531 15.7V 2 0V 3 12.2V 1 0V 2 -15.6V 3 -12.0V

    IC5011 0V 2 -14.3V 3 0V 4 13.1V 5 0V 6 0V 7 0.8V 8 -12.2V 9 0V

    10 0V

    Q401E 0VC 32.0VB 0.5V

    Q402E 0VC --B -1.6V

    Q422E 2.1VC 12.3VB 2.8V

    Q471E 0VC 11.8VB 0.6V

    Q472E 12.5VC 0VB 0.7V

    Q474E 0VC 0.1VB 0.7V

    Q554E 0VC 51.7VB 0V

    Q421E 135VC 57.4VB 134.5V

    Q555E 53.8VC 13.2VB 0V

    Q556E 54.7VC 13.2V

    B 53.8V

    Q572E 0VC 0V

    B 0.6V

    Q612E -0.2VC 0V

    B -0.2V

    Q613E 0VC --

    B 0V

    Q661E 0VC 5.3V

    B 0V

    Q611E 7.9VC -0.4V

    B 7.5V

    Q664E 0VC 37.8V

    B 0.1V

    Q641E 6.4VC 37.8V

    B 7.0V

    Q612-C

    1V/div. 10 s/div.

    Q613-C

    200V/div. 10 s/div.

    Q402-C

    10V/div. 10 s/div.

    Q401-C

    250V/div. 10 s/div.

    Q472-E

    5V/div. 2ms/div.

    IC501-pin3

    10V/div. 2ms/div.

    Q611-C

    1V/div. 10 s/div.

    On the Sub/ Def. Boa rd(1)

    IC3611 8.0V 2 2.4V 3 3.8V 4 7.0V 5 7.0V 6 - 7 - 8 - 9 0V10 0.8V 11 13.1V 12 0.2V 13 0.2V 14 0V 15 0V 16 0V 17 4.0V 18 6.8V19 4.1V 20 0V 21 12.0V 22 3.7V

    IC23311 0.7V 2 0V 3 0.3V 4 0.4V 5 4.0V 6 3.3V 7 0.4V 8 0V 9 0V

    10 0V 11 9.1V 12 9.1V 13 9.1V 14 4.0V 15 4.1V 16 9.1V

    Q361E 0VC 0.5VB 0.7V

    Q364E 0.2VC 12.0VB 0.2V

    Q2312E 0VC 1.6VB 0.2V

    Q2313E 0VC 6.3VB 0V

    Q2314E 0VC 0.9VB 0.4V

    Q2311E 0VC 5.1VB -1.8V

    Q2341E 0VC 4.5VB 0.1V

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    -26-Service Manual EH1 chassis

    On the Sub/ Def. Board(2)

    IC361-pin1

    2V/div. 10 s/div.

    DC=0V

    IC361-pin3

    2V/div. 10 s/div.

    DC=0V

    IC361-pin10

    2V/div. 10 s/div.

    DC=0V

    IC361-pin12

    5V/div. 2ms/div.

    DC=0V

    IC361-pin18

    2V/d iv. 2ms /d iv.

    DC=0V

    IC361-pin19

    2V/d iv. 2ms /d iv.

    DC=0V

    IC2311-pin7

    5V/div. 5 s/div.

    DC=0V

    IIC2361-pin7

    0.5V/div. 2ms/div.

    DC=0V

    IC2371-pin1

    5V/div. 2ms/div.

    DC=0V

    IC2371-pin7

    1V/div. 2ms /d iv.

    DC=0V

    IC2381-pin1

    5V/d iv. 2ms /d iv.

    DC=0V

    IC2381-pin7

    0.5V/div. 2ms/div.

    DC=0V

    IC2391-pin1

    2V/d iv. 2ms/d iv.

    DC=0V

    IC2391-pin7

    2V/div. 10 s/div.

    DC=0V

    On the Video Board

    IC21021 0V 2 0.1V 3 3.7V 4 0V 5 4.5V 6 3.3V 7 7.6V 8 0V 9 0.1V

    10 0.1V 11 0V 12 9.1V 13 9.1V 14 3.8V 15 4.2V 16 9.1V

    IC22021 0.4V 2 0.4V 3 0.4V 4 0V 5 4.7V 6 4.7V 7 4.7V 8 5.1V

    IC22031 0V 2 5.1V 3 5.1V 4 5.1V 5 0.2V 6 0V 7 5.0V 8 0V 9 0.1V

    10 0V 11 5.1V 12 5.0V 13 0.1V 14 0V 15 5.0V 16 5.0V

    IC22061 1.2V 2 0V 3 0V 4 0V 5 0.1V 6 2.2V 7 0.1V 8 0V

    Q2101E 5.1VC 9.1VB 5.7V

    Q2102E 5.1VC 9.1VB 5.7V

    Q2104E 5.0VC 9.1VB 5.6V

    Q2105E 4.1VC 9.1VB 4.8V

    Q2106E 4.1VC 9.1VB 4.9V

    Q2107E 3.6VC 0VB 3.1V

    Q2108E 2.9VC 9.1VB 3.5V

    Q2103E 5.0VC 9.1VB 5.6V

    Q2109E 3.6VC 9.1VB 4.3V

    Q2110E 3.8VC 7.4VB 4.4V

    Q2111E 6.9VC 9.1VB 7.5V

    Q2201E 4.3VC 9.1VB 5.1V

    Q2203E 0VC 0.6VB 0.2V

    Q2112E 4.3VC 9.1VB 4.8V

    Q2204E 9.1VC 0VB 5.6V

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    -27-Service Manual EH1 chassis

    On the Back Board

    IC12011 4.5V 2 4.5V 3 4.5V 4 4.5V 5 4.5V 6 0V 7 4.5V 8 4.5V 9 4.5V

    10 4.5V 11 4.5V 12 0V 13 4.5V 14 4.5V 15 4.5V 16 4.5V 17 4.5V 18 0V19 4.1V 20 3.7V 21 0V 22 4.5V 23 4.5V 24 4.5V 25 4.5V 26 4.5V 27 4.5V28 4.5V 29 4.5V 30 4.5V 31 4.5V 32 4.5V 33 4.5V 34 0V 35 4.5V 36 0V37 4.5V 38 4.5V 39 4.5V 40 4.5V 41 4.5V 42 4.5V 43 4.5V 44 9.0V 45 4.5V46 4.5V 47 4.5V 48 4.5V

    Q1001E 0.6VC 0VB 0V

    Q1002E 3.9VC 9.1VB 4.5V

    Q1201E 3.8VC 9.0VB 4.5V

    Q1202E 3.8VC 0VB 4.5V

    Q1203E 5.1VC 9.0VB 3.0V

    Q1204E 4.5VC 9.0VB 5.1V

    Q1205E 6.1VC 9.0VB 5.1V

    Q1003E 6.6VC 9.0VB 7.4V

    Q1206E 7.5VC 9.0VB 5.6V

    Q1207E 2.6V

    C 0VB 1.9V

    Q1208E 2.6V

    C 0VB 1.9V

    Q1232E 4.0V

    C 9.0VB 4.6V

    Q1231E 4.0V

    C 9.0VB 4.7V

    IC1201pin47

    0.2/div. 20 s/div.

    IC1201-pin43

    0.5/div. 20 s/div.

    IC1201-pin40

    0.5/div. 20 s/div.

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