Sanyo DS27820 Service Manual

GENERAL
This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.
ON-SCREEN SERVICE MENU SYSTEM
1. Enter the Service Menu:
• While pressing the MENU key, 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 you want to adjust. (See page 4 for On-screen Service Menu.)
• Use the + or – key to adjust the data.
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 4 – 6 for detailed information.)
INITIAL BUS DATA SETUP
Note: When IC802 (EEPROM) is replaced, the Service Menu NO. 03 HP (H Phase), NO. 05 VPO (V Position), NO. 07 VLN
(V Lin), NO. 10 VSC (V S Correction), NO. 14 VC (V Compression), NO. 21 SBI (Sub Bias), NO. 28 PRE (Preshoot
Adj), NO. 29 WP (White Peak Limiter), NO. 32 BSG (Black Str Gain), NO. 34 DCR (DC Reset), NO. 37 AF (Auto Flesh),
NO. 41 RYA (R-Y/B-Y Angle),NO. 54 SCO (Sub Color), NO. 56 SSH (Sub Sharpness), NO. 57 OPT (SA Option ), NO.
58 OP2 (SA Option 2), and NO. 59 HR (OSD Position) should be set up for proper TV operation before attempting
the 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. 03 HP (H Phase) with ▲ or ▼ key. Adjust the data with + or – key for 10.
4. Select NO. 05 VPO (V Position) with ▲ or ▼ key. Adjust the data with + or – key for 12.
5. Select NO. 07 VLN (V Lin) with ▲ or ▼ key. Adjust the data with + or – key for 13.
6. Select NO. 10 VSC (V S Correction) with ▲ or ▼ key. Adjust the data with + or – key for 15.
7. Select NO. 14 VC (V Compression) with ▲ or ▼ key. Adjust the data with + or – key for 7.
8. Select NO. 21 SBI (Sub Bias) with ▲ or ▼ key. Adjust the data with + or – key for 54.
9. Select NO. 28 PRE (Preshoot Adj) with ▲ or ▼ key. Adjust the data with + or – key for 2.
10. Select NO. 29 WP (White Peak Limiter) with ▲ or ▼ key. Adjust the data with + or – key for 1.
11. Select NO. 32 BSG (Black Str Gain) with ▲ or ▼ key. Adjust the data with + or – key for 2.
12. Select NO. 34 DCR (DC Reset) with ▲ or ▼ key. Adjust the data with + or – key for 1.
13. Select NO. 37 AF (Auto Flesh) with ▲ or ▼ key. Adjust the data with + or – key for 1.
14. Select NO. 41 RYA (R-Y/B-Y Angle) with ▲ or ▼ key. Adjust the data with + or – key for 2.
15. Select NO. 54 SCO (Sub Color) with ▲ or ▼ key. Adjust data with + or – key for 5.
16. Select NO. 56 SSH (Sub Sharpness) with ▲ or ▼ key. Adjust data with + or – key for 8.
17. Select NO. 57 OPT (SA Option ) with ▲ or ▼ key. Adjust the data with + or – key for 88.
18. Select NO. 58 OP2 (SA Option 2) with ▲ or ▼ key. Adjust the data with + or – key for 54.
19. Select NO. 59 HR (OSD Position) with ▲ or ▼ key. Adjust the data with + or – key for 18.
20. Press the MENU key to turn off the Service Menu display.
NO. DATA
XX OPT XXX XXXXXXXX
Figure 1. Service Menu Display
ITEM NO.
TITLE
BINARY DATA
(8 bit)
DECIMAL DATA

Sanyo DS27820 Specifications

General

Brand	Sanyo
Model	DS27820
Category	TV
Language	English