Sanyo DS32224 Operation and maintenance manual

ContentsSafety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments. . . . . . . . . . . . . 3 - 10
Service Hints. . . . . . . . . . . . . . . . . . . . . . 11
Mechanical Disassemblies. . . . . . . . . . . 12
Chassis Electrical Parts List . . . . . . 13 - 21
Cabinet Parts List . . . . . . . . . . . . . . . . . . 22
Component and Test Point
Locations . . . . . . . . . . . . . . . . . . . 23 - 26
Schematic Insert . . . . . . . . . . . . . . . 29 - 36Schematic Notes . . . . . . . . . . . . . . . . . 29
Pin Layouts . . . . . . . . . . . . . . . . . . . . . 29
Capacitor and Resistor Codes . . . . . . 29Block Diagram. . . . . . . . . . . . . . . 30 - 31
Voltage Charts . . . . . . . . . . . . . . . 30 - 32
Waveforms. . . . . . . . . . . . . . . . . . . . . . 32
Main Board. . . . . . . . . . . . . . . . . . 33 - 36
CRT Socket Board . . . . . . . . . . . . . . . . 33
Specifications
Power Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz
89W (Avg), 2.5A (Max)Antenna Input Impedance. . . . . . . . . . . . . . . . . 75Ω
UHF/VHF/CATV
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
14 - 69 (UHF),
01, 14-94, 95-125 (CATV)
Remote Ready . . . . . . . . . . 33 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 1.0 W/CH
Intermediate Frequency
Picture IF Carrier. . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube. . . . . . . . . . . . . . . . . . M80JUA068X72
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . 10
Transistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Except within Tuner and RC Pre-Amp.
Cabinet Dimensions
Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 755 mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732 mm
Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 538 mm
REFERENCE No. SS780048-02
DS32224, G7TJA, PRODUCT CODE 111370488
AS
FILE NO.
SS780048
REF : No.
COLOR TELEVISION
Notice
CORRECTION
SERVICE FLASH
PRODUCTION CHANGE
ADD INFORMATION
Please add this notice to the Service Manual listed below. REVISION 02
Category :
DS32224
Model:
U.S.A. / CANADA
Destination:
MARCH / 15 / 2004
Date:
32224-02
Effective from : Chassis No.
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service Manual.
If the Service Manual Chassis No. does not match the unit’s, additional Service Literature
is required. This chassis is similar to Chassis No. 32224-00, however, all Service Information
is given in this Notice for Chassis No. 32224-02 used in Model DS32224.

— 2 —
SAFETY PRECAUTIONS
WARNING: The chassis of this receiver has a floating
ground with the potential of one half the AC line voltage in
respect to earth ground. Service should not be attempted by
anyone not familiar with the precautions necessary when
working on this type of equipment.
The following precautions must be observed:
1. An isolation transformer must be connected in the power
line between the receiver and the AC line before any ser-
vice is performed on the receiver.
2. Comply with all caution and safety-related notes provid-
ed on the side of the cabinet, inside the cabinet, on the
chassis, and 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, adjustment covers, shields and barriers.
DO NOT OPERATE THIS TELEVISION RECEIVER
WITHOUT THE PROTECTIVE SHIELD IN POSITION AND
PROPERLY SECURED.
4. Before replacing the back cover of the set, thoroughly
inspect the inside of the cabinet to see that no stray parts
or tools have been left inside.
Before returning any television to the customer, the
service technician must perform the following safety
checks to be sure that the unit is completely safe to
operate without danger of electrical shock.
ANTENNA COLD CHECK
Remove AC plug from the 120 VAC outlet and place a
jumper across the two blades. Connect one lead of an ohm-
meter to the jumpered AC plug, and touch the other lead to
each exposed antenna terminal (UHF and VHF antenna ter-
minals). The resistance must measure between 1M ohm and
5.2M ohm. Any resistance value below or above this range
indicates an abnormality which requires corrective action.
LEAKAGE CURRENT CHECK
Plug the AC line cord directly into a 120 VAC outlet. (Do not
use an isolation transformer for this check.) Use an AC volt-
meter, that has 5000 ohms per volt or more sensitivity.
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15 µF
150 VAC capacitor, between a known good earth ground
(water pipe, conduit, etc.) and all exposed metal parts of the
cabinet (antennas, handle bracket, metal cabinet, screw
heads, metal overlays, control shafts, etc.). Measure the AC
voltage across the 1500 ohm resistor. The AC voltage
should not exceed 750 mV. A reading exceeding 750 mV
indicates that a dangerous potential exists. The fault must
be located and corrected. Repeat the above test with the
receiver power plug reversed.
NEVER RETURN A RECEIVER TO THE CUSTOMER
WITHOUT TAKING THE NECESSARY CORRECTIVE ACTION.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in solid-state receivers is
the picture tube. The picture tube is specially constructed to
limit X-Ray emission. For continued X-RADIATION protection,
the replacement tube must be the same type as the original
(including the suffix letter in the part numbers). Excessive high
voltage may produce potentially hazardous X-RADIATION. To
avoid such hazards, the high voltage must be maintained within
specific limits. Refer to the X-RADIATION WARNING NOTE on
the CHASSIS SCHEMATIC in this service manual for specific
high voltage limits. If the high voltage exceeds specified limits,
check the components specified on the chassis schematic
diagram and take the necessary corrective action. Carefully
follow the instructions for the +B Voltage Check and the High
Voltage Check to maintain the high voltage within the specified
limits.
HIGHVOLTAGE HOLD-DOWNTEST
To prevent X-RADIATION from the picture tube due to
excessive high voltage, a HOLD-DOWN circuit is provided in
the high voltage circuit. Every time the receiver is serviced,
the high voltage HOLD-DOWN circuit must be tested for
proper operation. Refer to the HIGH VOLTAGE HOLD-
DOWN TEST in service adjustments.
PRODUCT SAFETY NOTICE
When replacing components in a receiver, always keep in
mind the necessary product safety precautions. Pay special
attention to the replacement of components marked with a
star (★) in the parts list and in the schematic diagrams. To
ensure safe product operation, it is necessary to replace
those components with the exact same PARTS.
SAFETY INSTRUCTIONS
0.15 µF 150V AC
1500 ohm
10 watt
Good earth ground
such as a water pipe,
conduit, etc.
AC OUTLET
TELEVISION
RECEIVER
READING SHOULD NOT EXCEED 750 mV.
AC VOLTMETER
(5000 ohms per volt or more sensitivity)
To be touched to all of exposed metal parts.
Voltmeter Hook-up for Leakage Current Check.

GENERAL
This set has an on-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.
To enter the Service Menu, first disconnect the AC power cord. Then while pressing the MENU key on the front control panel, recon-
nect the AC power cord. The adjustments can now be made with the remote control or front control panel keys.
ON-SCREEN SERVICE MENU SYSTEM
1. Enter the Service Menu:
•While pressing the MENU key on the front control panel, reconnect the AC
power cord. The Service Menu Display will now appear. (See Figure 1.)
2. Service Adjustments:
•Press the ▲or ▼key to select the desired service menu item you
want to adjust. (See page 5 for On-screen Service Menu.)
•Use the + or – key or number keys to adjust the data.
The + or – keys will increase or decrease the data sequentially.
The number keys (0 ~ 7) toggle only their respective bits between
1 and 0 and are used to change the Sub-Address. For example to
change bit 5 press the number 5 key. (See below)
3. Exit from the Service Menu:
•Press the MENU key to turn off the Service Menu display.
SERVICE ADJUSTMENTS
— 3 —
IC802 (EEPROM) REPLACEMENT
When IC802 (EEPROM) is replaced, IC801 (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 5 – 7, Table 1, for detailed bus data information.)
INITIAL BUS DATA SETUP
Note: When IC802 (EEPROM) is replaced, change the following initial reference data for proper TV operation before
attempting service adjustments.
1. Disconnect the AC power cord (AC 120V line).
2. While pressing the MENU key, reconnect the AC power cord. The Service Menu display will now appear.
3. Select NO. 3C SCO (Sub Color) with ▲or ▼key. Adjust the data with + or – key for 17.
4. Select NO. 3D STI (Sub Tint) with ▲or ▼key. Adjust the data with + or – key for 10.
5. Select NO. 3F SSH (Sub Sharpness) with ▲or ▼key. Adjust the data with + or – key for 04.
6. Select NO. 40 AFC6HFR (AFC / H Frequency) with ▲or ▼key. Adjust the data with number keys for BF.
7. Select NO. 41 VTR7HP (V Trans / H Phase) with ▲or ▼key. Adjust the data with + or – key for 0E.
8. Select NO. 42 VS (V Size) with ▲or ▼key. Adjust the data with + or – key for 35.
9. Select NO. 43 VSP7VPO (V Sync Sep / V Position) with ▲or ▼key. Adjust the data with number keys for 15.
10. Select NO. 45 VC5LVL (V Compresion / V Lin Bottom) with ▲or ▼key. Adjust the data with number keys for 9F.
11. Select NO. 4A RD (Red Drive) with ▲or ▼key. Adjust the data with + or – key for 3A.
12. Select NO. 4C BD (Blue Drive) with ▲or ▼key. Adjust the data with + or – key for 3A.
13. Select NO. 50 OSD (OSD Contrast) with ▲or ▼key. Adjust the data with + or – key for 0A.
14. Select NO. 54 FLS (Y/C Filter Mode) with ▲or ▼key. Adjust the data with + or – key for 83.
15. Select NO. 57 YGM6DCR4BSS2BSG (Y Gamma / DC Reset / Black Steak Start / Black Streak Gain) with ▲or ▼key.
Adjust the data with number keys for 61.
SCO
3C 17 00010111
Figure 1. Service Menu Display
ITEM NO.
TITLE
BINARY DATA
(8 bit)
HEX DATA
(b7) (b6) (b5) (b4) (b3) (b2) (b1) (b0)
0 1 0 1 0 1 1 0 BINARY DATA
(8 bit)

INITIAL BUS DATA SETUP (Cont.)
16. Select NO. 58 AFC7CBP5 (Auto Flesh / C Band Pass Filter) with ▲or ▼key. Adjust the data with number keys for C0.
17. Select NO. 59 DIG6ABL5MSD4BAT (OSD D/A / ABL Defeat / Mid Stop / ABL Threshold) with ▲or ▼key. Adjust the data
with numbers key for 64.
18. Select NO. 5A RYA (R-Y/B-Y Angle) with ▲or ▼key. Adjust the data with + or – key for 00.
19. Select NO. 5B CBO4CRO (Cb DC Offset / Cr DC Offset) with ▲or ▼key. Adjust the data with number keys for CC.
20. Select NO. 5F VL5BPF (Video Level / S BPF Sw) with ▲or ▼key. Adjust the data with number keys for 80.
21. Select NO. 60 EWD (E/W DC) with ▲or ▼key. Adjust the data with + or – key for 31.
22. Select NO. 61 EWA (E/W Amp) with ▲or ▼key. Adjust the data with + or – key for 18.
23. Select NO. 62 EWT (E/W Tilt) with ▲or ▼key. Adjust the data with + or – key for 20.
24. Select NO. 63 EWB4EWP (E/W Corner Btm / E/W Corner Top) with ▲or ▼key. Adjust the data with number keys for B8.
25. Select NO. 64 EWC7HLV6HSC (E/W Cor SW / H Lock V Det / H Size Comp) with ▲or ▼key. Adjust the data with
number keys for 06.
26. Select NO. 65 BOW4ANG (Bow Correct / Angle Correct) with ▲or ▼key. Adjust the data with number keys for 88.
27. Select NO. 67 HBL4HBR (H Blanking L / H Blanking R) with ▲or ▼key. Adjust the data with number keys for 2A.
28. Select NO. 6A YTH2YGA (Y TH / Y Gain) with ▲or ▼key. Adjust the data with number keys for 0D.
29. Select NO. 6B RWD6ROF4BWD2BOF (R Width / R Offset / B Width / B Offset) with ▲or ▼key. Adjust the data with
number keys for 10.
30. Select NO. 84 OP2 (V Guide / Tone / AV / PIP/ F/V / I-CH C En / C en Sel) with ▲or ▼key. Adjust the data with number
keys for 42.
31. Select NO. 8D HR (H Display Position) with ▲or ▼key. Adjust the data with + or – key for 18.
32. Select NO. 8E SBO (Sub Bright Offset) with ▲or ▼key. Adjust the data with + or – key for 07.
33. Select NO. 92 DTN (YUV Sub Tint) with ▲or ▼key. Adjust the data with + or – key for FC.
34. Select NO. 96 DCB (YUV Cb Offset) with ▲or ▼key. Adjust the data with + or – key for 00.
35. Select NO. 97 DCR (YUV Cr Offset) with ▲or ▼key. Adjust the data with + or – key for 00.
36. Select NO. 9B EBR (16:9 Sub Bright) with ▲or ▼key. Adjust the data with + or – key for FB.
37. Select NO. A1 EET (16:9 Sub E/W Tilt) with ▲or ▼key. Adjust the data with + or – key for FD.
38. Select NO. A2 EEP (16:9 Sub E/W Corner Top) with ▲or ▼key. Adjust the data with + or – key for FE.
39. Select NO. AB VFL (Filter System AV) with ▲or ▼key. Adjust the data with + or – key for 04.
40. Press the MENU key to turn off the Service Menu display.
— 4 —
SERVICE ADJUSTMENTS (Cont.)

— 5 —
Table 1. ON-SCREEN SERVICE MENU
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 Reference Data. (See pages 3 and 4 for Initial Bus Data Setup.)
No. TITLE INITIAL REFERENCE INITIAL SETUP INITIAL SETUP FUNCTION
DATA HEX DATA HEX DATA BINARY
3C SCO 0F 17* 00010111 Sub Color
3D STI 15 10* 00001000 Sub Tint
3E SB 20 20 00100000 Sub Bright
3F SSH 08 04* 00000100 Sub Sharpness
40 AFC6HFR A5 BF* 10111111 AFC(6) Horizontal Frequency
41 VTR7HP 0C 0E* 00001110 Vertical Trans(7) Horizontal Phase
42 VS 40 35* 00110101 Vertical Size
43 VSP7VPO 2A 15* 00010101 Vertical Sync Separator(7) Vertical Position
44 CDM5UVL 06 06 00000110 Vetical Count Down Mode(5) Vertical Linearity Top
45 VC5LVL 9E 9F* 10011111 Vertical Compression(5) Vertical Linearity Bottom
46 VSC 14 14 00010011 Vertical S Correction
47 RB 00 00 00000000 Red Bias
48 GB 00 00 00000000 Green Bias
49 BB 00 00 00000000 Blue Bias
4A RD 38 3A* 00111010 Red Drive
4B HT5HTD4GD 37 37 00110111 Half Tone(6~5) Half Tone Defeat(4) Green Drive
4C BD 38 3A* 00111010 Blue Drive
4D SBI 30 30 00110000 Sub Bias
4E ↓↓↓↓Not Used
4F ↓↓↓↓Not Used
50 OSD 07 0A* 00001010 On Screen Display Contrast
51 CRG6 80 80 10000000 Coring
52 ↓↓↓↓Not Used
53 ↓↓↓↓Not Used
54 FLS 84 83* 10000011 Y/C Filter Mode
55 GRY7CRS5GYA3CKO 03 03 00000011 Gray(7) Cross B/W(6~5) G-Y Angle(4) Color Killer
56 FBP6YAP4WP 42 42 01000001 FBP Blanking(6) Y APF(4) White Peak
57 YGM6DCR4BSS2BSG A5 61* 01100001 Y Gamma(7~6) DC Reset(5~4) B Strk Start(3~2)B Strk Gain
58 AFC7CBP5 40 C0* 11000000 Auto Flesh(7) Color Band Pass Filter(5)
59 DIG6ABL5MSD4BAT 44 64* 01100100 OSD D/A(6) ABL Defeat(5) Mid Stop(4) ABL Threshold
5A RYA 0B 00* 00000000 R-Y/B-Y Angle
5B CBO4CRO 88 CC* 11001100 Cb DC Offset(7~4) Cr DC Offset
5C ↓↓↓↓Not Used
5D STS7RAD 20 20 00100000 S Trap Switch(7) RF AGC Delay
5E FMM7VIF4IAS 00 00 00000000 FM Mute(7) VIF System Switch(4) IF AGC
5F VL5BPF A0 80* 10000000 Video Level(7~5) S BPF Switch
60 EWD 28 31* 00101110 E/W DC
61 EWA 17 1B* 00011011 E/W Amp
62 EWT 1D 20* 00100000 E/W Tilt
63 EWB4EWP 88 B8* 10111000 E/W Corner Bottom(7~4) E/W Corner Top
64 EWC7HLV6HSC 03 06* 00000110 E/W Correction Sw(7) H Lock V Det(6) H Size Comp
65 BOW4ANG 78 88* 10001000 Bow Correction(7~4) Angle Correction
66 PRE6OVR4CTT C0 C0 11000000 Preshoot Adj(7~6) Overshoot Adj(5~4) Chroma Trap Test
67 HBL4HBR 38 2A* 00101010 H Blanking Left(7~4) H Blanking Right
68 SSP5VM 90 90 10010000 Sync Sep Sens(7~5) VM Gain
69 VBL4 00 00 00000000 V Size 0.75(7) V Blanking Select
6A YTH2YGA 00 0D* 00001101 Y TH(3~2) Y Gain
6B RWD6ROF4BWD2BOF 00 10* 00010000 R Width(7~6) R Offset(5~4) B Width(3~2) B Offset
80 ATT 07 07 00000111 Attenuation (MTS Input Level)