Sanyo C29FS51 User manual

SERVICE MANUAL Colour Television
Product Code: 113020204
Original Version
Chassis Series: LB6-A
BG4E
FILE NO.
Model No. C29FS51
Service Ref. No.
(Argentina)
Give complete “SERVICE REF. NO.” for
parts order or servicing. It is shown on the
rating plate 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 from
the design specifications. Refer to the speci-
fication table.
Specifications
Power Source . . . . . . . . AC220V, 50Hz / 60Hz
Receiving System . . . . . PAL (M/M, N/N), NTSC (M/M)
Channel Coverage
Antenna mode VHF: CH02-CH13, UHF: CH14-CH69
CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22
Super band: CH23-CH36, Hyper band: CH37-CH64
Ultra band: CH65-CH94 and CH100-CH125
Low mid band: CH95-CH99
Video IF . . . . . . . . . . . . . 45.75MHz
Aerial Input Impedance 75Ω
Input Terminals
AV1 (Video): Composite Video Input (Phone Jack) x 1
S-Video Input (Separated Y/C) DIN 4-pin Jack x 1
AV1 (Audio):L/R Stereo Input (Phone Jack) x 1 set
AV2 (Video):Composite Video Input (Phone Jack) x 1
AV2 (Audio):L/R Stereo Input (Phone Jack) x 1 set
DVD (Video): Component Y, CB, CRInput (Phone Jack) x 1 set
DVD (Audio): L/R Stereo Input (Phone Jack) x 1 set
Output Terminals
Video Monitor Output: Phono jack x 1
Audio Monitor Output: L/R Stereo Output (Phone Jack) x 1 set
Headphone Jack: Mini stereo jack x 1
Sound Output (RMS) . . . 5W + 5W
Speaker . . . . . . . . . . . . . . 6cm x 12cm x 2 pcs.
Dimensions . . . . . . . . . . . 750(W) x 590(H) x 416.5(D) mm
Weight . . . . . . . . . . . . . . . approx. 36.5 Kg
Specifications subject to change without notice.

Contents
-2-
SafetyNotice ........................................................................... 2
ChassisBlockDiagram ................................................................... 3
ICBlockDiagrams..................................................................... 4-8
ServiceAdjustments................................................................... 9-18
CabinetPartsList....................................................................... 19
ChassisElectricalPartsList............................................................ 20-27
Safety Notice
SAFETY PRECAUTIONS
1: An isolation transformer should be connected in the
power line between the receiver and the AC line
when a service is performed on the primary of the
converter transformer of the set.
2: Comply with all caution and safety-related notes
provided on the cabinet back, inside the cabinet, on
the chassis or the picture tube.
3: When replacing a chassis in the cabinet, always
be certain that all the protective devices are
installed properly, such as, control knobs, adjust-
ment covers or shields, barriers, isolation resistor-
capacitor networks etc.. Before returning any
television to the customer, the service techni-
cian must be sure that it is completely safe
to operate without danger of electrical 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
be the same type as the original including suffix letter. Excessive high voltage may produce potentially hazard-
ous X - RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer
to this service 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 high voltage 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 which
safety can be of special significance. It is particularly recommended that only parts designated on the parts list
in this manual be used for component replacement designated by mark . No deviations from resistance
wattage or voltage ratings may be made for replacement items designated by mark .

Chassis Block Diagrams
-3-
SIGNAL PROCESSING CIRCUIT
P10/21
Antenna
CRT DRIVE
TRC
B
/
G/R
W
S
Y
E
K
V
0
0
2+
B
/
G/
R
HV/Fo/Sc
R/C PRE-AMP
TUNER BUS H-OUT DY-H
IF DY-V
(LV76113) HORIZ-DRIVE HORIZ-OUT
SAW TU
OW
Ere
tl
i
f
FBP
E
SU
L
P
T
B
FNI
SUSOC
AV2/DVD/S-VIDEO C VIDEO
V-
/E
-14187AL
(
+VOEDIV
T
UOROTINOM
S-VIDEO Y/AV1-V TU
O-
TR
E
VOEDI
V
PM33
52M
JN
AV1/AV2/DVD AUDIO IN AUDIO BUS MONITOR OUT AUDIO AUDIO L/R
SPEAKER(L)
SIF OUT
LR
/L
)307
27
AL
(
R)
E
-50
224AL
(R/
L
R
/L
DVD
/2VA
/
1
V
A
PFB2504CT
TUPN
I
O
IDUA
TU
O-
OIDU
ATUP
TUO
O
ID
UA
)NEK
N
A
S
(V0
22C
A
SPEAKER(R)
POWER
LA7846NZ
)
+28V
+32V
+5V
+8V
-16V
+
8
V
+5VRC
+
5VRC
+28V
+140V
10V
10V
+
5V
+16V
+8V
+8V

IC Block Diagrams
-4-
IC601 POWER SUPPLY IC (STRW6754)
FUNCTIONAL BLOCK DIAGRAM

IC Block Diagrams
-5-
IC201 < IF/Video/Chroma/Def./CPU > LA76113

-6-
IC Block Diagrams
IC501<Vertical.Output> LA78141
IC001<AUDIO AMP> LA42205

-7-
IC Block Diagrams
LA72703 BTSC Decoder - Reference Apprication -
10 11 12
Slave Address = 80h ( 1000 000* ) :Pin8=OPEN/GND
Slave Address = 84h ( 1000 010* ) :Pin8=H
Vcc 5V
+
98
65 7
4
21 3
21
2324 22 15 14 13
161719
20 18
MATRIX
MODE
OUT
REGULATOR
+ ++
+
++
+
+
+
4.5M
BPF
LPF
SIF DEMOD
SAP BPF
SAP
DEMOD
L-R
DEMOD ST/SAP
SW
LPF
-6dB
PILOT
CANCELLER
STEREO
PLL
PILOT
DET
PILOT
LEVEL DET
IIC
DECODE
SYSTEM
CONTROL
Offset
Cancell
dbx processor
SAP
DET
4u7 4u7 22u 4u7
OUT(L) OUT(R)
MODE
Monitor
2u2
1u
1u
0.1?
1u
4k7
MUTE
L+R L-R/SAP
ST
SAP
Address
Control
GND
MUTE
Wide RMS DET
Spectral DET
Spectral In
Offset Cancel
0.1u
0.1u
4u7
1u to
0.33u
SIF SIGNAL
from Tuner
Address
Control IIC
DATA
IIC
CLOCK
2u2 22u
Spectral RMS
DET
100u
0.1u
47u
+
10u
+
10u
33n 33n
+
1u
+
560k
LPF
IC3401 LA72703

-8-
IC Block Diagrams
IC1002 NJM2533M
IC1001 TC4052BF

-9-
LB6A VER1.14
NO. NAME DATA
00 RFAGC 17H XX010111
1.11101111 2.11111000
Item No.
Status Register Bit Allocations Data value
General
This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the
service adjustments.
2. Service Adjustments:
Press the CHANNEL UP/DOWN button on the remote
control handset to select the desired service menu
item you want to adjust.
Use the VOLUME + / - button to adjust the data. The
+ or - button will increase or decrease the data
sequentially.
3. Exit from the Service Menu
Press the MENU button to turn off the Service Menu
display.
The data which is set in the service mode is stored
into the memory IC automatically.
[ Service Mode Display ]
Service Adjustment-1
1. Enter the Service Menu
While pressing the MENU button on the television, press the Number Key 2 on the remote control unit.
The Service Menu now appear.
IC802 (EEPROM) Replacement
When IC802 (EEPROM) is replaced, IC201 (CPU) will automatically write the initial reference data into IC802 for basic TV operation.
However, the bus data should be checked and some bus data should be set up before attempting the service adjustments. (See
pages 9 ~ 11 for detailed information.)
Service Adjustments
-9-
VOLUME +
VOLUME -
CHANNEL UP
CHANNEL DOWN
MENU
MENU
Item Name

-10--10-
Service Adjustments
On-screen Service Menu
Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments.
When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be
checked and be set up or readjusted according to the procedures described in the following pages.
Initial Setup Data marked with an ∗should be changed from Initial Value Data.
No Item Description Initial Data Range
0 RFAGC Align RF AGC threshold 17 00～3F
1 HPHA Alignsynctoybackphase 10 00～1F
2 VSIZE Align vertical amplitude 72 00～7F
3 V DC Align vertical DC bias 22 00～3F
4 VSIFT Align vertical position 08 00～0F
5 V LIN Align vertical linearity 0F 00～1F
6 V SC Align vertical S-correction 16 00～1F
7 VCOMP Align vertical size compensation 07 00～07
8 EWDC Align East/West DC bias 33 00～3F
9 EWAMP Align East/West amplitude 06 00～3F
10 EWTIL Align East/West Trapezoid 32 00～3F
11 EWTOP Align East/West Top corner correction 01 00～0F
12 EWBOT Align East/West Bottom corner correction 02 00～0F
13 EWCSW Select control range for Corner correction 01 00～01
14 HSCMP Align horizontal size compensation 07 00～07
15 HBL Left H-Blanking Control 04 00～07
16 HBR Right H-Blanking Control 05 00～07
17 HPH60 Alignsynctoybackphase(60Hzdata)03 00～3F
18 VSZ60 Align vertical amplitude (60Hz) FF 00～FF
19 VDC60 Align vertical DC bias (60Hz) 00 00～7F
20 VSF60 Align vertical position (60Hz) 1D 00～1F
21 VLI60 Align vertical linearity (60Hz) 00 00～3F
22 VSC60 Align vertical S-correction (60Hz) 00 00～3F
23 VCO60 Align vertical size compensation (60Hz) 00 00～0F
24 EWD60 Align East/West DC bias (60Hz) 01 00～7F
25 EWA60 Align East/West amplitude (60Hz) 7F 00～7F
26 EWT60 Align East/West trapezoid (60Hz) 01 00～7F
27 EWB60 Align East/West Bottom corner correction (60Hz) 02 00～1F
28 EWP60 Align East/West Top corner correction (60Hz) 03 00～1F
29 CSW60 Select control range for Corner correction 00 00～01
30 CMP60 Align horizontal size compensation 03 00～0F
31 T DIS Disable the Test SW & enable Audio / Video Mute SW 01 00～01
32 HFREQ Align ES Sample horizontal frequency (MP is adjusted in the wafer line.)
40 00～7F
33 AFCG Selecthorizontalrstloopgain&H-syncgatingon/off00 00～01
34 AMUTE Disable audio outputs 00 00～01
35 VMUTE Disable video outputs 00 00～01
36 VSZ75 Enable 75% vertical size mode 00 00～01
37 SKILL Force free-run mode 00 00～01
38 VKILL Disable vertical mode 00 00～01