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COLOR TELEVISION
CONTENTS
SERVICE MANUAL 21” T2S08 CHASSIS
WITH NICAM&TELETEXT
ⅠSAFETY PRECAUTION ………………………………………………… 1
ⅡSPECIFICATION ………………………………………………………… 2
Ⅲ IC’S GENERAL DESCRIPTION ……………………………………… 3
Ⅳ SPECIAL IC INTRODUCTION ………………………………………… 3
Ⅴ CHASSIS BLOCK DIAGRAM ………………………………………… 12
Ⅵ SERVICE MODE&ADJUSTMENT …………………………………… 13
Ⅶ TEST POINT WAVE FORM&SCHEMATIC DIAGRAM …………… 18
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ⅠSAFETY PRECAUTION 1. X-RAY RADIATION PRECAUTION 1.1 Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards the high voltage must be specified limit. The normal value of the high voltage of this receiver is 27KV±500V under 230V AC power source. The high voltage must not exceed 30KV. 1.2 Each time a receiver requires servicing the high voltage should be checked following the HIGH VOLTAGE CHECK procedure in this manual. It is recommended the reading of the high voltage be recorded as a part of the service record. It is important to use an accurate and reliable high voltage meter.
1.3 The primary source of X -RAY RADIATION in this TV receiver is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as used in this TV receiver.
1.4 Some parts in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only after referring the PRODUCT SAFETY NOTICE below.
2. GENERAL SAFETY PRECAUTION The following are the necessary precautions to be observed before servicing this chassis WARNING: Service should not be attempted by anyone unfamiliar with the necessary 2.1 Since the power supply circuit of this receiver is directly connected to the AC power line. An isolation transformer should be used during any dynamic service to avoid possible shock hazard. 2.2 Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube is highly evacuated and if broken, glass fragments will be violently expelled. Use shatterproof goggles and keep picture tube away from the unprotected body while handling.
2.3 When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as: nonmetallic control; knobs, insulating covers, shields, isolation resistor-capacitor, network, etc.
2.4 Connection wires must be kept away from components with high voltage or high temperature. 2.5 When replacing parts or circuit boards, disconnect the power cord. 2.6 When replacing a high voltage resistor (metal oxide resistor) on circuit board, keep the resistor APP. 10mm (1/2 in.) away from circuit board.
2.7 If any fuse in this TV receiver is broken, replace it with the FUSE specified in the chassis parts list. 2.8 The receiver is designed to operate with 230V (50Hz) AC mains.
3. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics are often
passed unnoticed by a visual inspection and the X-RAY RADIATON protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire, X-RAY RADIATION or other hazards.
Warning!
There are no any repairable components in this TV set. Do not try to make any change to it. High voltage inside may cause danger.
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ⅡSPECIFICATION RF SYSTEM
COLOR SYSTEM: PAL SECAM SOUND SYSTEM:B/G D/K I NICAM STEREO
VIDEO SYSTEM PAL SECAM NTSC4.43 TUNING SYSTEM VOLTAGE SYNTHESIZER TUNING
RECEIVING CHANNEL VHF-L: E2~S6 48.25 MHz~140.25MHz VHF-H: S7~S36 147.25 MHz~423.25MHz
UHF: S37~DS57 431.25 MHz~863.25MHz PROGRAM PRESET 99
AV JACKS 1 SIDE RCA AV IN
1 FULL SCART AND 1 AV SCART TELETEXT 1PAGE
ANTENNA INPUT 75Ω(UNBALANCE) AUDIO OUTPUT ≥2.5W MAIN POWER 170-260V AC 50/60Hz
POWER CONSUMPTION 100W
ⅢCHIP GENERAL DESCRIPTION 1. MAIN BOARD PART IC001 ST92195 MCU With ON SCREEN DISPLAY and TELETEXT Decoder IC002 24C08 8 Kbit Serial I2C Bus EEPROM IC101 STV2246 I²C BUS-Controlled Multistandard Single Chip TV Processor IC301 STV9306A/B BUS-Controlled VERTICAL DEFLECTION W.E/W CORRECTION CIRCUIT IC601 H11A817C OPTOCOUPLERS IC603 MC7808CT +8V VOLTAGE REGULATOR IC604 IC605
MC7805CT +5V VOLTAGE REGULATOR
IC606 MC7812CT +12V VOLTAGE REGULATOR IC701 CD7522CS 3W AUDIO AMPLIFIER IC801 STV8216 Multi-standard TV Audio Processor and Digital Sound Demodulator
ⅣCHIP INTRODUCTION 1. ST92195 The ST92195 microcontrollers are developed and manufactured by STMicroelectronics using a proprietary n-well HCMOS process. Their performance derives from the use of flexible 256-register programming model for ultra-fast context switching and real-time event response. The intelligent on-chip peripherals offload the ST9 core from I/O and data management processing tasks allowing critical application tasks to get the maximum use of core resources. TheST92195 MCU support low power consumption and low voltage operation for power-efficient and low-cost embedded systems.
1.1 Main features 28 fully-programmable I/Os 4 channels Analog/Digital Converter
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Built in I2C bus interface Built in OSD and Teletext decoder 14-bit Voltage Synthesis PWM output for VS tuning system
1.2 Pin description Pin No. Pin Name Signal Name I / O Function
1 P2.0 IRIN I IR Input 2 RESET RESET I Hardware Reset 3 P0.7 NC I/O Not Used 4 P0.6 MUTE O Mute Output PIN 5 P0.5 NC I/O Not Used 6 P0.4 ON/OFF O Standby Output 7 P0.3 DESIGN I Service menu control 8 P0.2 SCART1 I Identify scart entering Design 9 P0.1 SCART2 I Identify scart entering Design
10 P0.0 AV SEL O AV Selection 11 P3.7 S0 O AV/TV 12 P3.6 S1 O AV/TV 13 P3.5 TV/DVD O TV/DVD 14 P3.4 DFD O Default data control 15 B B O OSD Blue colour Signal Output 16 G G O OSD Green colour Signal Output 17 R R O OSD Red colour Signal Output 18 BLANK BLANK O OSD Blanking Output 19 P5.1 SDA I/O I2C data line 20 P5.0 SCL O I2C clock line 21 VDD VDD +5 V Digital Supply 22 JTDO JTDO Test Pin 23 WSCF WSCF Analog Pin For VPS / WPP slicer line PLL 24 WSCR WSCR Analog Pin For VPS / WPP slicer line PLL 25 AVDD3 AVDD3 +5V Analog VDD For PLL 26 TEST0 TEST0 Test Pin 27 MCFM MCFM Analog Pin for display pixel freq. multiplier 28 JTCK JTCK Test Pin 29 TXCF TXCF Analog pin for VPS /WSS line PLL 30 CVBSO CVBSO Test Pin 31 AVDD2 AVDD2 Analog Power supply 32 JTMS JTMS Test Pin 33 CVBS2 CVBS2 I CVBS In for VPS / WSS 34 CVBS1 CVBS1 I CVBS In for Teletext Slicer 35 AGND AGND Analog ground 36 GND GND Digital ground 37 JTRST0 JTRST0 Test Pin 38 PXFM PXFM Analog Pin for display pixel freq. multiplier 39 AVDD1 AVDD1 Analog Power Supply 40 HSYNC HSYNC I Horizontal Sync Input 41 VSYNC VSYNC I Vertical Sync Input
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42 P4.0 BSW1 O Band switch 1 43 P4.1 BSW2 O Band switch 2 44 P4.2 SAW_SW1 O SAW Filter switch 1 45 P4.3 NC I/O Not connected 46 P4.4 SAW_SW2 O SAW Filter switch 2 47 P4.5 NC I/O Not connected 48 P4.6 Vlin PWM O V-linearity PWM output 49 P4.7 VOL PWM O VOL PWM output 50 XTAL XTAL Clock oscillator 51 XTAL XTAL Clock oscillator 52 P2.5 LED2 O LED driver 53 P2.4 LED1 O LED driver 54 P2.3 VS O VST Voltage ouput 55 P2.2 NC I/O Not connected 56 P2.1 KB INPUT I KEY Input
1.3 Block diagram
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1.4 General application description BAND SWITCH OUTPUT (Pin42 Pin43) Pin42 BSW1 Pin43 BSW2 SELECTED BAND
0 0 NOT USED 0 1 VHF-L 1 0 VHF-H 1 1 UHF
KEYBOARD INPUT LEVEL (Pin56) KEY IN (Pin 56) KEY PRESSED 0.285 ~ 0.587V Volume – (1 K ohm) 0.706 ~ 1.098V Volume + (2.2 K ohm) 1.204~ 1.596V Program- (3.9 K ohm) 1.704 ~ 2.096V Program+ (6.2 K ohm) 2.194 ~ 2.586V MENU (9.1 Kohm) 2.704 ~ 3.096V TV/DVD (13.8 Kohm) 3.205 ~ 3.606V AV/TV(22 Kohm) 3.745 ~ 4.145V Analog (37.4 Kohm) 4.282 ~ 4.682V OK (86.5 K ohm) Note:The pull up resistor of Pin56 is 10K.
TV/AV SELECTION (Pin11/Pin12) S0-Pin11 0 1 0 1 S1-Pin12 0 0 1 1
TV/AV MODE TV AV1/RGB AV2 S-VHS STANDBY OUTPUT (Pin6) STD-BY (Pin 6) Mode
0 Standby 1 Operating
2. STV2246H The STV224XH is fully bus-controlled IC for TV that include PIF, SIF, Luma, Chroma and Deflection processing functions. Used with a vertical frame booster (TDA8174A for a 90° chassis, STV9306 for a 110° chassis), they allow multi-standard (BG/DK/I/MN/LL’, PAL/SECAM/NTSC) sets to be designed with very few external components and no manual adjustments.
2.1 Main features I²C Bus Control PIF Circuit with PLL Demodulation (Positive and Negative Video) SIF Circuit with QSS Structure, FM Demodulation and AM Demodulation for France Intercarrier Capability and Built-in Sound Band pass Sound Subcarrier Output for Stereo Chassis (FM, NICAM) Integrated Chroma Filters and Luma Delay Line and Integrated Chroma Delay Line 3 channels input Video Switch and 2 channels CVBS output OSD RGB Inputs and external RGB Inputs Interface PAL/SECAM/NTSC Chroma Demodulators Black Stretch and peaking Circuit
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Automatic Cut-off Current Loop, manual Cut-off possible for low-cost applications Two Horizontal Deflection PLLs APR (Automatic RGB Peak Regulation) or RGB Peak Limitation Function
2.2 Pin description PIN NO. SYMBOL DESCRIPTION
1 SIFIN1 SIF input 2 SIFIN2 SIF input 3 AGCSIFCAP AGC SIF capacitor 4 VREFIF Voltage reference filter 5 AGCPIFCAP AGC PIF capacitor 6 PIFIN1 PIF input 7 PININ2 PIF input 8 TUNERAGCOUT AGC Tuner output 9 IFPLL IF PLL filter 10 GNDIF IF Ground 11 AM/FMOUT/SC AM/FM Mono sound or stereo carriers output 12 VCCIF 5V IF Supply 13 INTCVBSOUT Internal CVBS output 14 EXTAUDIOIN External audio input 15 PIFLC1 LC input 16 PIFLC2 LC input 17 VCC2 Video/LUMA Supply voltage (8V) 18 CVBSIN1 Internal video input 19 GND2 Video/LUMA ground 20 CVBSIN2 External video input 21 BS Black stretch capacitor 22 Y/CVBSIN3 Y(SVHS) or CVBS3 external input 23 CHR Chroma(SVHS) input 24 APR Automatic RGB peak regulation 25 BEXT/Cb External blue input or Cb input 26 GEXT/Y External green input or Y input 27 REXT/Cr External red input or Cr input 28 FBEXT External fast blanking input 29 NC/CVBSOUT1 Not connected or CVBS output1 30 BOUT Blue output 31 GOUT Green output 32 ROUT Red output 33 ICATH Cathode current measurement input 34 BOSD OSD Blue input 35 GOSD OSD Green input 36 ROSD OSD Red input 37 FBOSD/HC OSD Fast blanking input/half contrast 38 XTAL3/BTUN 3.5x MHz Crystal or bell filter tuning capacitor 39 XTAL2 3.5x MHz Crystal 40 XTAL1 4.43/3.5x MHz Crystal
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41 CLPF Chroma PLL filter
42 X1/VAMP/CHROUT XTAL1 control pin, vertical amplitude DAC output and chroma reference signal output
43 GND1 Chroma/scanning ground 44 CVBSOUT2 Second video switch output 45 VCC1 Chroma/scanning power supply (8V) 46 BCL/SAF Beam current limiter control voltage and safety input(X-ray) 47 VERT Vertical output pulse 48 HOUT Horizontal output pulse 49 LFB/SSC Line flyback input and super-sandcastle output 50 SLPF Scanning PLL filter 51 SCL I2C Bus clock input 52 SDA I2C Bus data input 53 VCCD Digital supply voltage(5V) 54 GNDD Digital ground 55 AUDIOOUT Main audio output 56 FMCAP FM demodulation capacitor
2.3 Block diagram
3. STV9306A The STV9306 is a fully I2C controlled vertical deflection IC designed forusein110°, 4/3 or 16/9 CRT applications. It integrates both the vertical deflection and E/W correction circuitries necessary in design of a 110° chassis.
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3.1 Main features Fully I2C controlled Internal flyback generator (UPTO60V) and DC Coupled operation Self adapted sawtooth (50/60Hz) Vertical linearity, amplitude and centering adjustments. Horizontal width, pincushion, trapezoid and corner adjustments. Breathing correction.
3.2 Pin description PIN NO. SYMBOL DESCRIPTION
1 SCL I2C Bus clock 2 CRAMP Ramp capacitor 3 SDA I2C Bus data 4 CHOLD Hold capacitor 5 SYNC Sync input 6 VS Supply voltage 7 FLYBACK Flyback output 8 GND Vertical output 9 OUT Vertical output 10 VOPS Vertical output Power Supply 11 EWOUT EW output 12 SENS2 Vertical current sense2 13 EWFB EW feedback 14 SENS1 Vertical current sense1 15 BREATHING Breathing input
3.3 Block diagram
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4. CD7522CS The CD7522CS is a stereo 2×3W BTL audio amplifier, specially designed for high quality sound TV applications. Features of the CD7522CS include Stand-by and Volume control functions.
4.1 Main feature 2×3W output power RL = 8Ω @THD = 0.5% VCC = 10V Standby and volume control function Low turn-on turn-off pop noise Low voltage supply ≤ 14V Thermal overload protection
4.2 Pin description
Pin NO. SYMBOL DESCRIPTION 1 VCC Power supply 2 OUT1+ Ch1 output + 3 GND Gnd (output ch1) 4 OUT1- Ch1 output - 5 ST-BY Standby control 6 Ch1 In Ch1 audio output 7 GND Gnd (Input) 8 Ch2 In Ch2 audio output 9 Vol DC volume control 10 OUT2- Ch2 output - 11 GND Gnd (output ch2) 12 OUT2+ Ch2 output +
4.3 Block diagram
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5. STV8216 This chip included three main parts: TV Sound Demodulator: provides all the necessary circuitry for the demodulation of audio transmissions of European and Asian terrestrial TV broadcasts. The various transmission standards are automatically detected and demodulated without user intervention. Audio Processor: based on DSP technology independently controls loudspeaker, subwoofer and headphone signals. It offers basic and advanced features, such as a ST Wide Surround, Equalizer, Automatic Loudness and Smart Volume Control for television viewer comfort. The STV8226/36 versions can perform additionally the SRS 3D Surround for stereo and mono signals. Audio Matrix: 3 stereo and 1 mono external analog audio inputs to loudspeakers and headphone, with 2 stereo external analog audio outputs (SCART compatible).
5.1 Main features NICAM, AM, FM Mono and FM 2 carrier stereo demodulators for all sound carriers between 4.5 and 7MHz Mono input provided for optimum AM demodulation performances Demodulation controlled by automatic standard recognition system Sound IF AGC with wide range, over modulation and carrier offset recovery, Smart volume control, smart volume control, 5-band equalizer bass/treble control, automatic loudness control Loudspeaker and Headphone outputs with volume/balance controls and beeper Subwoofer output with volume control and programmable bandwidth, spatial Sound Effects (ST Wide Surround and Pseudo-Stereo), low-noise audio mutes and switches I²C Bus-controlled, single and standard 27 MHz crystal oscillator, Power supplies: 3.3V Digital, 5V or 8V Analog, embedded 3.3V regulators
5.2 Pin description Pin NO. SYMBOL Pin TYPE DESCRIPTION
1 SIF Analog Sound IF input 2 VTOP Analog ADC VTOP decoupling pin 3 VREF IF Analog AGC Voltage reference decoupling Pin 4 VDDIF Analog power supply 3.3V Power supply for IF AGC & ADC 5 GNDIF Analog power supply Ground for IF AGC & ADC 6 MONOIN Analog Mono Input 7 AO1L Analog Left SCART1 audio output 8 AO1R Analog Right SCART1 audio output 9 VDDC Analog power supply 3.3V Power supply for audio DAC/ADC 10 GNDC Analog power supply Ground for audio DAC/ADC 11 AI1L Analog Left SCART1 audio input 12 AI1R Analog Right SCART1 audio input 13 VMC1 Analog Switched VREF decoupling Pin for audio converters (VMCP) 14 VMC2 Analog VREF decoupling Pin for audio converters (VMC) 15 AI2L Analog Left SCART2 audio input 16 AI2R Analog Right SCART2 audio input 17 VDDA Analog power supply 3.3 V power supply for audio buffers, matrix & bias 18 GNDAH Analog power supply Ground for audio buffers and SCART 19 AO2L Analog Left SCART2 Audio output
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20 AO2R Analog Right SCART2 Audio output 21 VDDH Analog power supply 8V/5V power supply for SCART and audio buffers 22 VREFA Analog Voltage reference for audio buffers 23 AI3L Analog Left SCART3 audio input 24 AI3R Analog Right SCART3 audio input 25 BGAP Analog Bandgap voltage source decoupling 26 LSL Analog Left loudspeaker output 27 LSR Analog Right loudspeaker output 28 SW Analog Subwoofer output 29 HPL Analog Left headphone output 30 HPR Analog Right headphone output 31 GNDSA Analog power supply Substrate analog/digital shield 32 HPD Bidirectional Headphone detection input (active low) 33 ADR Input Hardware I²C chip address control 34 SCL Open drain I²C serial clock 35 SDA Open drain I²C serial data 36 REG Analog 5V power regulator control 37 RESET Input Hardware reset (active low) 38 SYSCK Bidirectional System clock output 39 MCK Bidirectional I²S master clock output 40 VDD1 Digital power supply 3.3V Power supply for digital core & IO cells 41 GND1 Digital power supply Ground for digital core & IO cells 42 GNDSP Analog power supply Substrate analog/digital shield for clock-PLL 43 XTI Input Crystal oscillator Input 44 XTO Output Crystal oscillator output 45 VDDP Analog power supply 3.3V power supply for analog PLL clock 46 GNDP Analog power supply Ground for analog PLL clock 47 GND2 Digital power supply Ground for digital core, DSPs & IO cells 48 VDD2 Digital power supply 3.3V power supply for digital core, DSPs & IO cells 49 CKTST Input Must be connected to ground 50 SDO Bidirectional I²S bus data output 51 ST/SDI Bidirectional Stereo detection output / I²S bus data input 52 WS Bidirectional I²S bus word select output 53 SCK Bidirectional I²S bus clock output 54 BUS1 Bidirectional I²C bus expander output1 55 BUS0 Bidirectional I²C bus expander output2 56 IRQ Bidirectional I²C status read request
5.3 Block diagram
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ⅤCHASSIS BLOCK DIAGRAM
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Ⅵ SERVICE MODE&ADJUSTMENT The Service-1 mode is entered by pressing the “SERVICE” key on remote control when the TV is in ON condition and not in any Menu mode. In service mode, by pressing “OK” key, Service-2 is accessed. by pressing “OK” key again, Serivice-3 is accessed. By pressing “PP” key, exit Service mode.
6.1 WHITE BALANCE ADJUSTMENT The items within the Service-1 mode can be accessed using P+/P- keys and the selected item can be modified by using V+/V- keys. The parameters controlled in the Service-1 menu are : a) Red Gain ( 0 ... 63 ) b) DC Red ( 0 .... 127) c) Green Gain ( 0 .... 63) d) DC Green ( 0 .... 127) e) Blue Gain ( 0 .... 63)
f) DC Blue ( 0 .... 127) g) APR_threshold (0….15)
h) LOGO ( the first show the length of logo, and the followed is the logo)
i) R-Cutoff (0…63) j) G-Cutoff (0…63)
The display of Service-1 menu is showed as follows:
6.2 VIF ADJUSTMENT When in Service-1 menu ,if “OK” key is pressed , Service-2 menu appears and the display is as follows.The parameters controlled in the Service-2 menu are : a) Tuner AGC ( 0 ... 63 ) b) Horizontal position 50 Hz( 0 ... 63) c) Vertical position 50 Hz (0…15)
d) Vertical amplitude 50Hz (0…63) e) Vertical linearity 50Hz (0…63)
f) Horizontal position 60 Hz( 0 ... 63) g) Vertical position 60 Hz (0…15) h) Vertical amplitude 60 Hz (0…63) i) Vertical linearity 60 Hz (0…63) j) Sub-Bright Maximum (0…63) k) Sub-Bright Minimum (0…63) l) Sub Tint (0…63) m) VCO Coarse ( 0 ... 15) n) VCO Fine ( 0 ... 127 ) o) VCO Coarse L1( 0 ... 15) p) VCO Fine L1( 0 ... 127 )
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The display of Service-2 menu is showed as shown: The VCO status bar at the bottom of the screen appears only if either VCO Coarse item or VCO Fine item is selected. The VCO status is read from the Read register of STV223X/4X and guides whether to Increase / Decrease the VCO registers to attain VCO OK Status. For doing VCO adjustment , Feed a 38.9MHZ Carrier as IF input and adjust VCO Coarse and fine parameters to get VCO OK Status. If the cursor is in VCO Coarse or Fine, and the display shows VCO OK status, then pressing of AV” key will automatically put VCO fine to the Centre of the +60 to -60 KHz window. For doing VCO L1 adjustment ,Feed a 33.9 MHZ carrier as IF input and adjust VCO Coarse L1 and VCO Fine L1 to get VCO OK Status. If the cursor is in VCO Coarse L1 or Fine L1 , and the display shows VCO OK status, then pressing of “AV” key will automatically put VCO fine for L1 to the Centre of the +60 to -60 KHz window. Another fast way of adjustment of VCO is to put the selection bar to either VCO Coarse or fine and press the “AV” key. The VCO adjustment is done automatically. Similarly if you put the selection bar to VCO Coarse L1 or Fine L1 and press the “AV” key , the VCO L1 adjustment will be done automatically. NOTE:Below items are not used in this chassis:
Vertical position 50 Hz Vertical amplitude 50Hz Vertical linearity 50Hz Vertical position 60 Hz Vertical amplitude 60 Hz Vertical linearity 60 Hz
6.3 STV9306 ADJUSTMENT When in Service-2 menu, if “OK” key is pressed, Service-3 menu appears and the display is as follows, if the IC STV9306 has not been detected, then Service-4 (design menu) menu will appear.
1) Vertical amplitude for 50Hz signal. 2) Vertical amplitude for 60Hz signal. 3) Vertical shift (internal separated by 50Hz and 60Hz) 4) S Correction. 5) C Correction. 6) Horizontal width adjustment. 7) Pincushion Correction. 8) E/W Sharp Correction. 9) Trapezium Correction.
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6.4 DESIGN OPTION SETTING When in Service-3 menu, if “OK” key is pressed, Option menu appears and the display is as follows:
OPTION1 b7 = Over modulation (0=Disable, 1=Enable, it’s suggested to set it to 0 normally.) b5 = P/N/S crystals application (0=2 Crystals, 1= 1 Crystals, according the quantity of crystal used for color decoding in chassis.) b4 = Cutoff Loop (0= OFF, 1=ON, it’s suggested to set it to 1 normally) b3 = Safety Reset (0=Active, 1=Non, it’s suggested to set it to 0 normally) b2 = MONO IN (0 = OFF, 1= ON, Depend on the sound decoding solution used in chassis. ) b1 = Sound Demodulation (0 = Intercarrier/MONO, 1 =QSS/NICAM, depend on the sound decoding solution used in chassis.) b0 = logo display (0 =OFF, 1= ON, it’s suggested to set it to 0 normally.) OPTION2 (set to 0 by default) b5 = HALF_CONTRAST (0 = OFF, 1=ON) b4 = Color 6dB (0 = OFF, 1 = ON) b3 = APR Feature (0 = ON, 1= OFF) b2 = Black Stretch (0 = ON, 1= OFF) b1 = Auto Flesh (0 = ON, 1= OFF) b0 = Coring (0 = ON, 1 = OFF) OPTION3 b7 =SMART (0 = OFF, 1=ON, it’s suggested to set it to 1 normally) b5 = AVL (0 = OFF, 1=ON, it’s suggested to set it to 0 normally.) b4 = PIF overmodulation (0 = OFF, 1= ON, it’s suggested to set it to 0 normally.) b3 = Market_France --- secam LL (0 = OFF, 1 = ON, depend on the solution of chassis.) b2 = Manual/Auto cutoff (0 = Manual, 1 = Auto cutoff, depend on the CRT for chassis.) b1 = Mute pin low/high –to control the mute of speaker (0 = low, 1 = high, depend on the solution of chassis.) OPTION4 b6 = WIDE MODE (0 = OFF, 1=ON, it’s suggested to set it to 0 normally.) b4 = SCART2 (0 = OFF, 1=ON, depend on the solution of chassis.) b3 = RGB (0 = OFF, 1= ON, depend on the solution of chassis.) b2 = SVHS (0 = OFF, 1= ON, depend on the solution of chassis.) b1 = AV2 (0 = OFF, 1= ON, depend on the solution of chassis.)
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b0 = AV1 (0 = OFF, 1= ON, depend on the solution of chassis.) OPTION5 There are 8 bits used in OPTION 5. They are b0, b1, b2, b3, b4, b5, b6 and b7. For b0, normally, ST suggests to set it to 0. For b1, b2, they are used to select teletext languages. For b3, it’s used to enable AV3 and SVHS. When b3 is set to 0, SVHS is enabled. When b3 is set to 1 in binary, the value is 8 in decimal. AV3 is enabled.
For b4, b5, b6 and b7 of OPTION 5 are also used to set the brightness of background in teletext mode. When b4 b5 b6 and b7 are all set to 0, the brightness of teletext background is the same as brightness of TV background. When b4, b5, b6 and b7 are all set to 1, it’s the maximum brightness of teletext background. It’s the minimum brightness of teletext background when b4 is set to 1, and b5, b6 and b7 are all set to 0. you can set these 4 bits according to your favorite brightness of teletext background.
A. for 11 OSD languages CPU ST92195C7B1/MNS and ST92195C7B1/MTH for east Europe, the setting of the b1 and b2 is listed as below. 1. If b1 = b2 = 0, then the TEXT languages like “ENGLISH, FRENCH, SWEDISH, CZECH, GERMAN, PORTUGUESE (SPANISH), ITALIAN, RUMANIAN” can be decoded; 2. If b1=1, b2=0, then the TEXT languages like “ENGLISH, RUSSIAN (BULGARIAN), HUNGARIAN, TURKISH, GERMAN, PORTUGUESE (SPANISH), ITALIAN, RUMANIAN” can be decoded. 3. If b1=0, b2=1, then the TEXT languages like “POLISH, RUSSIAN (BULGARIAN), SWEDISH, SLOVAK, GERMAN, SLOVENIAN, LITHUANIAN, RUMANIAN” can be decoded. 4. If b1 = b2 =1, then the TEXT languages like “POLISH, RUSSIAN (BULGARIAN), SWEDISH, CZECH, GERMAN, CROATIAN, LETTISH, RUMANIAN” can be decoded. B. for 12 OSD languages CPU ST92195C7B1/MNU and ST92195C7B1/MOK (SHRINK VERSION) for Western Europe, the setting of the b1 and b2 is as below. 1. If b1 = b2 = 0, then the TEXT languages like “ENGLISH, FRENCH, FINNISH, CZECH, GERMAN, PORTUGUESE (SPANISH), ITALIAN, GREEK” can be decoded; 2. If b1=1, b2=0, then the TEXT languages like “ENGLISH, FRENCH, DANISH, NORWEGIAN, GERMAN, PORTUGUESE (SPANISH), ITALIAN, GREEK” can be decoded. 3. If b1=0, b2=1, then the TEXT languages like “POLISH, FRENCH, SWEDISH, CZECH, HOLLAND, SERBIAN, ITALIAN, RUMANIAN” can be decoded. 4. If b1 = b2 =1, then the TEXT languages like “POLISH, FRENCH, SWEDISH, CZECH, GERMAN, PORTUGUESE (SPANISH), LETTISH, RUMANIAN” can be decoded. ST Text b0 is used to change the process for adjusting Auto gain. 1) When CPU ST92195C7B1/MOK is used, the b0 is suggested to set to 0, the gain table for shrink version should be selected. 2) When CPU ST92195C7B1/MNU is used, the b0 is suggested to set to 1, the gain table for normal version will be selected. b1, b2, b3 = select the correct process, only for ST engineer adjustment. ROM_M6_P_valid | OSDEPROM_M6_R_valid | ROM_M6_R_valid | EPROM_M6_R_valid EPROM_M6_R_valid | ROMLESS_H5_P_valid | ROM_H5_P_valid | EPROM_M6_A_valid /* note: ROMLESS_M6_R_valid == ROM_M6_R_valid*/ b4 = Color transition for SVHS of STV224XX (0 = b5 is available, 1 = b5 is not available, and “SHARPNESS” is no feature.) b5 = (0 = STV224XH, 1 = STV224XC/D/E).
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b6 = Tuner Drift Correction (0 = OFF, 1 = ON.) b7 = RGB/DVD display on screen (0 = RGB, 1 = DVD.) HPOS OSD, Adjust horizontal position of OSD. VPOS OSD, Adjust vertical position of OSD. HPOS TXT, Adjust horizontal position of teletext. VPOS TXT, Adjust vertical position of teletext. HOTEL MODE, To set HOTEL MODE ON or OFF. When HOTEL MODE is enabled. The end user can not make any adjustment of items in menu INSTALL, AUDIO and ORGANIZE. Menu INSTALL and AUDIO will disappear automatically. Volume Limit, To set maximum volume of HOTEL MODE. It’s only available when HOTEL MODE is enabled. SndSt 1 b0, b1, b2, b3 of SndSt 1 are used to set the sound output level at pin 26 and pin 27 of STV8216 with RF signal. When b0, b1, b2, b3 of SndSt 1 are all set 0, the minimum sound output level will be got at pin 26 and pin 27 of STV8216 with RF signal. When b0, b1, b2, b3 of SndSt 1 are all set 1, it’s 15 in decimal. The maximum sound output level will be got at pin 26 and pin 27 of STV8216 with RF signal. b4, b5, b6, b7 of SndSt 1 are used to set the “SURROUND” gain at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 0, the minimum “SURROUND” gain will be got at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 1, it’s 240 in decimal. The maximum “SURROUND” gain will be got at pin 26 and pin 27 of STV8216 with RF signal. SndSt 2 b0, b2, b2, b3 of SndSt 2 are used to set the sound output level at pin 26 and pin 27 of STV8216 with AV signal. When b0, b2, b2, b3 of SndSt 1 are all set 0, the minimum sound output level will be got at pin 26 and pin 27 of STV8216 with AV signal. When b0, b2, b2, b3 of SndSt 1 are all set 1, it’s 15 in decimal. The maximum sound output level will be got at pin 26 and pin 27 of STV8216 with AV signal. b4, b5, b6, b7 of SndSt 2 are used to set the “EQUALIZER” gain at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 0, the maximum “EQUALIZER” gain will be got at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 1, it’s 240 in decimal. The minimum “EQUALIZER” gain will be got at pin 26 and pin 27 of STV8216 with RF & AV signal. LL1 MAGC, Just for SECAM LL1 SIF AGC setting purpose in STV8216. No available for PAL and NTSC system. When the item “LL1 MAGC” is set to OFF, the SIF AGC of STV8216 is set by software. When the item “LL1 MAGC” is set to ON, the SIF AGC of STV8216 can be set manually. The following steps can be followed when set this item. 1) To get a RF SECAM LL1 signal without sound modulation, only sound carrier is available. And put the
signal to input of tuner in CTV 5 chassis. 2) To press “SERVICE” key on remote control to enter service menu. And select the item “LL1 MAGC” by
P+ or P- key on remote control. Set the item “LL1 MAGC” from “OFF” to “ON” by V+ or V- key on remote control. service command,
1) “PP”----exit 2) “OK”---- switch between the service menu
-18-
3) “AV”---- auto VCO adjust 4) “MUTE” ---- one line gain
Enter service menu with user remote control, 1) Press key “Sleep” on remote control to set sleep time to “00:50”. 2) Within 5 seconds, press local key “V+” in TV set to enter service menu. 3) Adjust expecting item as the same as service remote control.
Ⅶ TEST POINT WAVE FORM&SCHEMATIC DIAGRAM
-19-
-20-
-21-
C6010.22u 250V
RT6
01M
Z72-
18
D634RU3YX
C634470P
ZD1013.9V
+
C63247u/16V
C131 47p
C101 0.1u
R133 1K
R131 1K
R129 1K
C3242200p
R137 39K
R118 5.6K
T2S08 CHASSIS SCHEMATIC DIAGRAM
+
C607100u/400V
D606
2R625 6.8
D6161N4148
D605
2
R62439
D603
D604
T604
R113100K
5R633 22
+C645 470u/25VD635
RU4YX
C637 470P
C303
0.1u
C3040.68u
D302 1N4007
R32468K C307
1000p
R31410K
R335100
R322100
C804
0.1u
C803
0.22u
C8050.1u
R802
22
D3091N4148
D631RG2
C631 470P
+C641
47u/160V
R302100
R301100
+C661100u/16V
R111 5.6K
R805100
R804100+
C820
0.47u/16V
C1034700p
C1120.1u
C105 0.22u
C104220p
R115470
D617RGP15J
D6141N4148
R61922
R620180K
R635150K
R63610K
VR6312K
D6416.2V
2 R303150
R306220
R25375
5
82
39
13
16
17
9
15
R637
150K
+C639
470u/16V
+
C67547u/16V
+
C658220u/16V
Q683B892
R317 1K
R120
4.7K
R8064.7K
AC230V
50Hz
SW601
T3.15A 250V
F601
Q613ST1802
C6161000p 2KV
C617
0.015u
Q6122SC3807
R62215K
R6262.7K
C6150.015u
R61522K
C6140.1u
C6134700p
R6172.2K
R6232.7K
ZD60
1
11V
Q6112SA1015
R6115.6K
IC601H11A817
C603 C605
C606 C604
R6025D11
C602
0.22u 250V
T601UF-LB-1604
XP601
XS602
XS601
C6080.1u 400V
XS603
L601
DEGAUSSING COIL
C6292200p 400V
R629
8.2M 1/2W
C603-C606 D603-D6071000p 1KV RM11C
C11322p
+
C6351000u/25V
V in
GND
V outIC605
7805
R685
15K
R6551K
C6510.1u
V in
GND
V out
IC6067812
C6570.1u
V in
GND
V out
IC6037808
C6740.1u
V in
GND
V outIC604 7805
C6710.1u
Q631 2SC1815
Q6822SC1815
Q1022SA1015
D1011N4148
R1144.7K
+
C1061u/50V
R116
270
2R640
15KIC602
uPC574
+C6591uF/50V
+12V
+8V
+5V-1
+33V
STD BY
RST
+5V
+12V-1+140V
C3260.1u
H OUT
Q3012SC2383
T301JDT1924 Q302
2SC5296
SCL
OSD R
MCFM
OSD G
JTCK
AVDD3
JTD0
TEST0
ESCR
VDD
WSCF
OSD FB
SDA
OSD B
DATA PRT
NC
S1
S0
TV /AV
SCART2 ID
SCART1 ID
SERVICE
STD BY
NC
MUTE
NC
RESET
IR IN1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28 29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
TXCF
CVBS0
AVDD2
JTMS
WSS
TXT VIN
AGND
GND
JTRET0
PXFM
AVDD1
H SYNC
V SYNC
BSW1
BSW2
PIF SW
NC
SIF SW
NC
VLIN PWM
VOL PWM
OSC
OSC
STDBY LED
STDBY LED
VT
NC
KB IN
IC101 ST92195
+C11047u/16V
R117 10R119 6.8K
C1080.1u
+C109
100u/16VL101
10uH
R134 1K
R123 10K
+5V
SCLSDA
OSD FB
OSD R
OSD G
OSD B
MUTE
RST
R121 15K C123
2200p
C122
0.1u
+C11147u/16V
C12182p
+
C1190.47u/50V
R141 10
C136
22p
R139 5.6K
C1354700p
C1330.1u
+C13447u/16V
R143 10
D1041N4148
D105
1N4148 ZD1025.1V
R190 1K
R149 5.6K
R102 10K
Q1012N3904
R112 33K
X101
4MHz C11439p
C11539p
R10133K
R104 33K
C1020.1u
R10333K
VT
+33V
SIF SW
BSW2
BSW1+5V
V SYNCSC
+5V
TXT
+5V
R171 10K
+5V
L80210uH
C8070.1u
+
C80610u/16V
C810
0.1u
+
C808
10u/16V
C811
0.1u
+C809
10u/16V
AO
2R
VD
DA
LSR
AI2
R
SWBG
AP
VER
FA
LSL
AL3
R
VD
DH
AI3
L
GN
DA
H
AO
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L
VM
C2
VM
C1
AI1
R
AI1
L
GN
DC
VD
CC
AO
1R
AO
1L
MO
NO
IN
GN
DIF
VD
DIF
VER
FIF
VTO
P
SIF
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
29303132333435363738394041424344454647484950515253545556
HPL
HPR
GN
DSA
HPD
AD
R
SCL
SAD
REG
RES
ET
SYSC
K
MC
K
VD
D1
GN
D1
GN
DSPXTI
XTO
VD
DP
GN
DP
GN
D2
VD
D2
CK
TST
SD0STWS
SCK
BU
S1
BU
S0
IRQ
IC80
1ST
V82
16
C812
0.1u
+
C81310u/16VR803330
C818 0.1u
+
C81910u/16V
C8160.1u
+
C81710u/16V
C8140.1u
+
C81510u/16V
L80310uH
+C82747u/16V
C821
0.1u
X801
27MHz
C823 22p
C822
22p
R807
270K
C824
0.1u
C826
0.1u
+
C825
10u/16V
VC
C
BH
BL
AG
C
VT
BU
IF
831 54 6 72 9 10 11
TU201
C216
0.1uR2034.7K
R202
27KR201100
+8V
+5V
SIF
AO
1L
AO
1R
AI1
LA
I1R
AI2
RA
I2L
+8V
AGCVT
+5V-1
BSW2BSW1
+C220
22u/16V
+C21247u/16V
+5V-1SDASCL
XS101
+5V
+8V
CV
BS
IN2
VC
C2
R E
XT
PIF
LC2
FB E
XT
B E
XT
Y/C
VB
S IN
3
G E
XT
APR
BS
CH
R
CV
BS
IN1
GN
D2
PIF
LC1
EXTA
UD
IAIN
INTC
VB
SOU
T
VC
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AM
/FM
OU
T
GN
D IF
IF P
LL
AG
C O
UT
PIF
IN2
PIF
IN1
AG
CPI
FCA
P
VR
EF IF
AG
CSI
FCA
P
SIF
IN2
SIF
IN1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
29303132333435363738394041424344454647484950515253545556
NC
B O
UT
G O
UT
R O
UT
ICA
T
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B
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G
OSD
R
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F
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MP
GN
D1
CV
BSO
UT
VC
C1
BC
L
VER
T
H O
UT
LFB
SLPF
SCL
SDA
VC
C D
GN
D D
AU
DIO
OU
T
FM C
AP
IC201STV2248
C429
0.1u
C428
0.1u
C427
0.1u
R42175
R42275
R42375
+
C225
1u/5
0V
R228330K
+
C4251u/50V
R418
75
+C217
1u/5
0V
+C426
1u/5
0V
R42075
+C218
1u/5
0V
R2231K
R2241K
Q2022SC1815
T2017K011
+
C233470u/16V
C219
0.1u
L202
10uH
+
C21047u/16V
C2110.1u
R219150
L203
10uH
SF2035.5MHz
C2030.1u
+
C22147u/16V
L20110uH
C80147p
L80110uH
R80
1560
C20
810
00pR221
150
C206
0.33u
+
C2091u/50V
+
C22310u/16V
C2240.022u
+
C2221u/50V
1 2
3
45
K3953MSF2021 2
3
45SF201K9650M
R231470
R232
470
R233
470
R235
1K
C22
9
0.1u
X202
4.43
C26115p
R22
956
K
R128 1K
R127 1K
R126 1K
R125 2.7K
R1301.5K
R124 1.5K
C2260.1u
C2270.1u
C2280.1u R234
47K
C23
847
00p
R23
627
KC23
70.
1u
R23
92.
2K
R24
6
2.2K
R24
8
100
R24
7
100+
C2351u/50V +
C232
100u
C2340.1u
L20410uH
R23
8
2.2K
R24
5
8.2K
D20
3
1N4148
R23
7
15K
+
C24
22.
2u/5
0VC24
347
00p
MHz16V
AB
L
TXT
VSY
NC
H O
UTSC+8V
SCL
SDA
+5V
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FB
OSD
R
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G
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B
ICA
T
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G O
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B O
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FBIRIGIBI
+5V
-1
+8V
Q2032SC1815
R211
470
R212
1KR213
560
V O
UT1
+8V
V IN
1
V IN
2
SIF
+
C305
100u/35V
R311
220K
R3202.2K
R31315K
R312100K
V C
IOL
1R323
0.56
2 R336470
C3080.033u
+C3061000u/16V
2R331 10
ZD30143V
2R329 10+
C3104.7u/160V
H C
OIL
L301 31uH
1R312 1K
2R308 10K
D305RGP15J
C312 0.01uF
C3110.22uF+
C3091u/250V
L3021mH
T302 ***
C316220p
L3030.2uH
C313
7500p
C3150.018uF
C314
4700p
D301BY228
D302RGP15J
1.6KV
2KV
C3170.039u
R3161
D308RGP15J
1R310
1
D303RGP15J
C322470p/500V
1R318 1K
D3041N4148
+
C3201000u/35V
3R399 ***
2R307
1
C318 470p/500V+
C31910u/250V
+C321
22u/160V
R3258.2K R321
8.2K
R31922K
ABL
+24V
+140V
+24V
SC
R24910K
+ C2464.7u/50V
ABL-V
XS302
SCLSDA
V SYNC+24V+12V
R506
2.2K
R515
2.2K
R521
2.2K
2R
523
10K
R326 220K
R5191.2K
R51
3
1.2K
R50
1
1.2K
R52010K
R512330C510
680p
R518330C515
680p
2R
522
10K
2R
524
10K
ZD5015.6V
R50747K
D5011N4007
C517
680p
Q502
BF423
D5041N4007
C511680p
Q507BF423
D5061N4007
C516680p
Q504BF423
R514 10K
R505 10K
Q501
2SC1815
Q504BF422
Q501BF422
R504330
C505
680p
R0743.9K
R0756.2K
R0721K
R0732.2K
SW3P-
SW4P+
SW5V-
SW6V+
D111HFT505M
R0151K
R170510
R168 10C1270.1u
I R
IC103HS0038
IF
+12VABL-V
KB
KG
KR
CRT
C5212200p/2KV
XP502
XP501XS101
HV
FOCUS
SCREEN
OU
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OU
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ICAT
R OUT
G OUT
B OUT
C8292200p
C7070.1u
C8302200p
C7060.1u
R8124.7K
R8114.7K
R810 18K
R809 18K+
C70247u/16V
+C703
470u/25V
D7011N4148
+C701220u
R7014.7K
Q7012SA1015
16V
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OUT R
+15V
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+12V-1
ROLORILISW
BIVI
VO
FBIGIRI
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XS401
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82.
2
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R70
92.
2
C708 0.1uXS701R SPK
ROLORILISW
BIVI
VO
FBIGIRI
123456789101112131415161718192021
XS402
L403
15uH
L402
15uH
L404
15uH
L401
15uH
C407
330p
C404
330p
C408
330p
C403
330p
R40
810
0K
R40
710
0K
R40
110
K
R40
622
0
R40
210
K
R40
522
0
R40968
V IN
2V
OU
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AI2
R
AI2
L
AO
2R
AO
2L
L407 15uH
L406 15uH
L408 15uH
L405 15uH
C422
330p
R41
510
0K
R416
100K
C41
833
0pC
421
330p
C41
733
0p
R414220
R413 10K
R417 220
R412 10K
V IN
1
R41968
V O
UT1
FBI
RI
GI
BI
SCA
RT1
ID
SCA
RT2
ID
AO
1L
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AI1
L
AI1
R
1. IS MARK OF CRITICAL COMPONENT2.SUBJECT TO CHANGE WITHOUT NOTICE
C207
0.1u
AG
C
+C
410
1u/5
0V +
C41
11u
/50V
+
C40
91u
/50V
+
C41
2
1u/5
0V
+ C423 1u/50V
+
C4131u/50V
+
C4141u/50V
+
C4241u/50V
R813 33
D201
1N41
R21
7
6.8K
R21
8
2.2K
R21
6
2.2K
Q2012SC1815
R215
10K
R21422K
C20
40.
1u C2050.1u
48
SIF
SW
IFIF +8V
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+
C245
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R24456K
R2432.2K
D20
2
1N41
48
C2410.1u +
C231
470u16V
C80256p
R105 6.8K
R10
712
K
R10
612
K
R136 6.8K
R110 4.7K
R160 6.8K
+5VSCLSDA
SCART2 ID
SCART1 ID
+5V
STD BY
R108 2.7K
R109 2.7K
Q8012SA1015
R808220K D
801
1N41
48
R526 22
T2S08 CHASSIS SCHEMATIC DIAGRAM
C33047p
Title:Number:Date:
Revision:Sheet:
Described: Checked: Approved:20-May-2007 1 of 1
1
+ C21347u/16V
+C21447u/16V
D3101N4007
D3111N4007
+15V
+15V
L206
10uH
R639
15K
+C6380.22uF
D636
1N4148
R621180K
C405
330p
C401
330p
C406
330p
C402
330p
C419
330p
C416
330p
C420
330p
C415
330p
AO
2LA
O2R
R2571K
Q2072SC1815
R230470
R240560
V O
UT2
+8V
+8V
VC
C
OU
T1+
GN
D1
OU
T1-
STD
BY
IN1
GN
D
IN2
VO
L
OU
T2-
GN
D2
OU
T2+
IC701 CD7522CS
R70410K
R705 3.3K
R703100K
Q7022SC1815
R702
4.7K
R122
4.7K
MU
TE
R0743.9K
SW3P-
R0743.9K
SW3P-
R516 100
R510 100
R502 100
Q5032SA1015
R508 4.7K
R509100
+C506
100u/16V
R638 3.3K
TP1 TP2
TP3 TP4
TP5 TP6 TP7
TP8 TP9
TP10
TP11 TP12 TP13
TP14
TP15
TP16
TP17
TP18
TP19 TP20
TP21
TP22
TP23
TP24
TP25
TP26
TP27TP28
TP29
SCL
CR
AM
P
SDA
CH
OLD
SYN
C
VC
C
FLY
BA
CK
GN
D
OU
T
VO
PS
EWO
UT
SEN
S2
EWSE
NS
SEN
S1
BR
EATH
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IC301 STV9306
A0
A1
A2
GN
DSD
ASC
L
VC
CW
C
IC10224C08