SERVICE MANUAL Colour Television
Product Code: 111355031
Original Version
Chassis Series: LA5-A
C4CMS
FILE NO.
Model No. C29LK40S
Service Ref. No. C29LK40S-00(Argentina)
Give complete SERVICE REF. NO. for partsorder or servicing. It is shown on the ratingplate at the cabinet back of the unit.
This T.V. receiver will not work properly in foreign countries where the television trans-mission system and power source differ fromthe design specifications. Refer to the specifi-cation table.
SpecificationsPower Source . . . . . . . . .AC220V, 50Hz / 60HzReceiving System . . . . . .PAL (M/M, N/N), NTSC (M/M)Channel Coverage
Antenna mode VHF: CH02-CH13, UHF: CH14-CH69CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22
Super band: CH23-CH36, Hyper band: CH37-CH64Ultra band: CH65-CH94 and CH100-CH125Low mid band: CH95-CH99
Video IF . . . . . . . . . . . . . 45.75MHz Aerial Input Impedance . . 75Ext. Terminals
Video inputs: Phono jack 2 (1Vp - p, 75)Audio inputs: Phono jack (R/L) 2 (436mVrms, more than 40K)Headphone Jack: Mini stereo jack 1
Sound Output (RMS) . . . . 3W + 3WSpeakers . . . . . . . . . . . 5cm x 9cm x 2 pcs.Dimensions . . . . . . . . . 656(W) 600(H) 496(D)mm Weight . . . . . . . . . . . . . approx. 31.0 Kg
Specifications subject to change without notice.
MENU CH - VOLUME + VIDEO L-AUDIO-R
Contents
-2-
Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16Purity and Convergence Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Chassis Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-27
Safety Notice
SAFETY PRECAUTIONS
1: An isolation transformer should be connected in thepower line between the receiver and the AC linewhen a service is performed on the primary of theconverter transformer of the set.
2: Comply with all caution and safety-related notes pro-vided on the cabinet back, inside the cabinet, on thechassis or the picture tube.
3: When replacing a chassis in the cabinet, always becertain that all the protective devices are installedproperly, such as, control knobs, adjustment coversor shields, barriers, isolation resistor-capacitor net-works etc.. Before returning any television to thecustomer, the service technician must be sure thatit is completely safe to operate without danger ofelectrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-structed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must bethe same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X- RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this ser-vice manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, takenecessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high volt-age check 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 listin this manual be used for component replacement designated by mark . No deviations from resistancewattage or voltage ratings may be made for replacement items designated by mark .
Chassis Block Diagrams
-3-
T611
B
Q432
IC50
1VE
RT-O
UT
T471
HV
IC80
2
IC80
1CP
UQX
XAVC
479P
56
34
TUNE
RSA
WIC
201
LA76
818A
IC34
01CX
A213
4QP
IC00
2LA
4205
2-EAU
DIO
AMP.
SDA
SCL
ON-TI
MER
STAN
DBY
R G BBL
K
OSD
32 31 19 20 21 22
SDA
SCL
1 2
X161
A101
ANT
IF IN
5/6
SCL
SDA
R
G
B
BLK
1211
1415
1617
13
3433
3 4
4 2
42
FM OUTPUT
EXT VIDEO IN
K100
1K1
002
REAR
AV
INFR
ONT A
V IN
VIDE
OVI
DEO
A-L
A-L
A-R
A-R
19 20 21
R G B
K192
1
128
ACPO
WER
CIRC
UIT
CO
NVER
TER
TRAN
S
130V
(MAIN
HIGH)
20V(A
UDIO)
12V(M
AIN LO
W)
24V(V
ERT)
9VIC
202
REG.
IC5V
-2
REG.
IC
IC68
15V
RC
2723
HORI
Z-OUT
FBT
VERT.OUT
HORIZ.OUT
AUDI
O RI
GHT
AUDI
O LE
FT
HEAD
PHON
E JAC
K
Q901
CRT
MEMO
RY
5/6 MTS
DECO
DER/A
UDIO
CONT
ROL&
SW
IIC BU
S CON
TROL
(WITH
PLL)
FILTE
RIF/
VIDEO
/CHR
OMA/D
EFLE
CTIO
N
DEFL
ECTIO
N YO
KE
2
R L15
C-CA
PTIO
N IN
40SELECTED VIDEO OUT
EXT.
L-IN
EXT.
R-IN
SP90
1
SP90
2
PINC
USHI
ON C
IRCU
IT(Q4
61, Q4
62)
MAIN SIGNAL PROCESSING CIRCUIT
Chassis Block Diagrams
-4-
SYSTEM CONTROL
IC80
2
IC80
1CP
UQX
XAVC
479P
56
34
SDA
SCL
32
31 19 20 21221 2
MEMO
RY
15 17 27
6
1810121329 23287
CPU
OSC
INOS
CCP
U O
SC O
UT
SOUN
D M
UTE
OUT
(ACT
IVE=
HIGH
)IC
002
AUDI
O AM
P.R
ESET
IN (R
ESET
=LOW
)
KEY
SWITC
HKE
Y SW
ITCH
IN
RC PR
E-AM
PR
C SI
GNA
L IN
REL
AY O
N/O
FF O
UT F
OR
DEG
AUSS
ING
(O
N=HI
GH)
LED
ON-
TIM
ER L
ED O
UT(O
N=LO
W)
IC34
01MT
S
POW
ER O
N/O
FF O
UT
(GRE
EN)
LED
(RED
)
POWE
R CI
RCUI
T
SDA
SCL
A101
TUNE
R
IC20
1IF/
VIDEO
/CHR
OMA DE
FLEC
TION
CIRC
UIT
POWE
R CI
RCUI
Tetc
.
AFT
S-CU
RVE
IN
C-CA
PTIO
N IN
OSD
BLK
OUT
OSD
RED
OUT
OSD
GRE
EN O
UTO
SD B
LUE
OUT
HO
RIZ.
SYN
C. IN
VER
T. S
YNC.
IN POW
ER P
ROTE
CT IN
(POW
ER E
RROR
=LOW
)
(STA
NDBY
=LOW
)
IC Block Diagrams
-5-
IC201 < IF/Video/Chroma/Def. > LA76818A
1 DCVO
L
SW FMD
ET
23
45
6
IFAG
C
RF
AGC
VIF
78
910
IFVCC 5V
1112
13
BUS
PEAKINGCO
RINGBLACK
STRETCH
SYNCSEP
1415
ABL
DCR
ESTCLAMP
OSD
CONTRAST
BRIG
HT
1617
1819
20
CONTRAST
BRIG
HTRG
BM
ATRIX
OSD
SW
DR
IVE/OUT
-OFF
VCC21
2223
FSC/SYNC SW
2425
2627
VERR
AMP
HOR
VCCHVCC
VERC/D
HOR
OUT
PHASE
SHIFTER
AFC2
AFC1
VERSEP
HOR
C/D
1/256
COLO
RCLAM
P
LPFALC
+
SWCLAM
P
DEM
O
PALSW
ACC
BPFO
N/OFF
DELAYLIN
E
SWTR
AP
AFTVID
EOD
ET
TRAP
LIMAM
P
BPF
SPLL
BPF
VIDEO
AMP
IFID
ENT
VIDEO
SW
APC1TIN
T
VXOD
DSAPC2
DC ADS.
CLAMP
VCO
1H D
ELAY
HOR
VCO
FBP
2829
3031
321H
VCC
3334
3536
3738
3940
4142
CLMP
4344
45
CLMP
V/C VCC5V
4647
4849
50
A2CPLL
5152
5354Audio Output
FM Output/Selected Audio Output
PIF AGC
RF AGC Output
PIF Input1
PI
