Service Adjustments - Sanyo Vizzon HT27547 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 Volume – key on the front control panel,
reconnect 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 Volume – 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 Channel L or M key to select the desired service menu
item you want to adjust. (See page 5 for On-screen Service Menu.)
•
Use the Volume + 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 (remote) to turn off the Service Menu display.
NOTE: The L and M symbols used in the following service adjustments refer to the Channel Up and Down keys not the
Menu keys.
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 Volume – key, reconnect the AC power cord. The Service Menu display will now appear.
3. Select NO. 3C SCO (Sub Color) with L or M key. Adjust the data with + or – key for 15.
4. Select NO. 3D STI (Sub Tint) with L or M key. Adjust the data with + or – key for 26.
5. Select NO. 41 HP (H Phase) with L or M key. Adjust the data with + or – key for 10.
6. Select NO. 42 VS (V Size) with L or M key. Adjust the data with + or – key for 3B.
7. Select NO. 44 HBL5VLN (H Blk L / V Lin ) with L or M key. Adjust the data with number keys for 30.
CONTINUED ON PAGE 4
SERVICE ADJUSTMENTS
— 3 —
ITEM NO.
HEX DATA
Figure 1. Service Menu Display
BINARY DATA
(8 bit)
TITLE
3C SCO
15 00010101
BINARY DATA
(8 bit)