Service Adjustments - Sanyo DS24424 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.
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.
(b7) (b6) (b5) (b4) (b3) (b2) (b1) (b0)
0 1 0 1 0 1 1 0
3. Exit from the Service Menu:
•
Press the MENU key to turn off the Service Menu display.
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. 3B SCN (Sub Contrast) with
4. Select NO. 3C SCO (Sub Color) with
5. Select NO. 3D STI (Sub Tint) with
6. Select NO. 41 HP (H Phase) with
7. Select NO. 42 VS (V Size) with
8. Select NO. 43 VSP7VKI6VDC (V Sync Sep / V Kill / V DC) with
9. Select NO. 44 HBL5VLN (H Blk L / V Lin ) with
10. Select NO. 45 HBR5VST (H Blk R / V Lin Shift) with
11. Select NO. 46 VSC (V S Correction) with
12. Select NO. 47 VTS6VC3CDM (V Test / V Comp / Count Dwn Mode) with
for 28.
13. Select NO. 4F SBI (Sub Bias) with
14. Select NO. 53 ABL5MSD4RTS3BAT (ABL Def / MID Stop / RGB Temp / ABL Thresh) with
with number keys for 0C.
15. Select NO. 55 STR4FLS (S Trap Test / Filter System) with
16. Select NO. 5B AF7CBP5 (Auto Flesh / C Band Pass) with
17. Select NO. 5C CKO (Color Killer) with
SERVICE ADJUSTMENTS
or key. Adjust the data with + or – key for 10.
or key. Adjust the data with + or – key for 15.
or key. Adjust the data with + or – key for 05.
or key. Adjust the data with + or – key for 0F.
or key. Adjust the data with + or – key for 5A.
or key. Adjust the data with number keys for 35.
or
or key. Adjust the data with + or – key for 0E.
or key. Adjust the data with + or – key for 30.
or key. Adjust the data with + or – key for 03.
— 3 —
ITEM NO.
HEX DATA
BINARY DATA
(8 bit)
or key. Adjust the data with number keys for 18.
key. Adjust the data with number keys for 43.
or key. Adjust the data with number keys
or key. Adjust the data with number keys for 21.
or key. Adjust the data with number keys for A0.
TITLE
3C SCO
15 00010101
BINARY DATA
(8 bit)
Figure 1. Service Menu Display
or key. Adjust the data