Service Adjustments - 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.
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
4. Select NO. 05 VPO (V Position) with
5. Select NO. 07 VLN (V Lin) with
6. Select NO. 10 VSC (V S Correction) with
7. Select NO. 14 VC (V Compression) with
8. Select NO. 21 SBI (Sub Bias) with
9. Select NO. 28 PRE (Preshoot Adj) with
10. Select NO. 29 WP (White Peak Limiter) with
11. Select NO. 32 BSG (Black Str Gain) with
12. Select NO. 34 DCR (DC Reset) with
13. Select NO. 37 AF (Auto Flesh) with
14. Select NO. 41 RYA (R-Y/B-Y Angle) with
15. Select NO. 54 SCO (Sub Color) with
16. Select NO. 56 SSH (Sub Sharpness) with
17. Select NO. 57 OPT (SA Option ) with
18. Select NO. 58 OP2 (SA Option 2) with
19. Select NO. 59 HR (OSD Position) with
20. Press the MENU key to turn off the Service Menu display.
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.)
NO.
XX OPT XXX XXXXXXXX
TITLE BINARY DATA
(8 bit)
ITEM NO.
DECIMAL DATA
Figure 1. Service Menu Display

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
or key. Adjust the data with + or – key for 10.
or key. Adjust the data with + or – key for 12.
or key. Adjust the data with + or – key for 13.
or
or
or key. Adjust the data with + or – key for 54.
or key. Adjust the data with + or – key for 2.
or
or
or key. Adjust the data with + or – key for 1.
or key. Adjust the data with + or – key for 1.
or
or key. Adjust data with + or – key for 5.
or
or key. Adjust the data with + or – key for 88.
or key. Adjust the data with + or – key for 54.
or key. Adjust the data with + or – key for 18.
DATA
key. Adjust the data with + or – key for 15.
key. Adjust the data with + or – key for 7.
key. Adjust the data with + or – key for 1.
key. Adjust the data with + or – key for 2.
key. Adjust the data with + or – key for 2.
key. Adjust data with + or – key for 8.
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