- While pressing the MENU key, reconnect the AC power cord.
- The Service Menu Display will now appear.
- Press the ▲or ▼key to select the desired service menu item you want to adjust. (See page 4 for On-screen Service Menu.)
- Use the + or – key to adjust the data.
- To Exit from the Service Menu: Press the MENU key to turn off the Service Menu display.
SERVICE MENU DISPLAY
ADJUSTMENTS AFTER REPLACING THE MEMORY IC [IC802]
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.
INITIAL BUS DATA SET-UP
Note: When IC802 (EEPROM) is replaced, the Service Menu No. 4 VS (V Size), No. 10 VSC (V S Cor.) , No. 28 PRE (Pre Shoot Adj), No. 32 BSG (Blk Str Gain), No. 42 RAD (RF AGC Delay), No. 48 SCO (Sub Color), No. 49 STI (Sub Tint), No. 50 SSH (Sub Sharpness), No. 51 OPT (Option 1), and No. 52 OPT2 (Option 2) should be set up for proper TV operation before attempting the service adjustments.(Bus data is in hexadecimal format)
- Disconnect the AC power cord (AC 120V line).
- While pressing the MENU key, reconnect the AC power cord. The Service Menu display will now appear.
- Select No. 4 VS (V Size)with ▲or▼key. Adjust the data with + or – key for 40.
- Select No. 10 VSC (V S Cor.),with ▲or▼key. Adjust the data with + or – key for 07.
- Select No. 23 POS (Pre/Over/SW), with ▲or▼key. Adjust the data with + or – key for 01.
- Select No. 28 PRE (Pre Shoot Adj), with ▲or▼key. Adjust the data with + or – key for 02.
- Select No. 32 BSG (Blk Str Gain), with ▲or▼key. Adjust the data with + or – key for 02.
- Select No. 42 RAD (RF AGC Delay), with ▲or▼key. Adjust the data with + or – key for 20.
- Select No. 45 FL (FM Level) with ▲or▼key. Adjust the data with + or – key for 15.
- Select No. 48 SCO (Sub Color) with ▲or▼key. Adjust the data with + or – key for 07.
- Select No. 49 STI (Sub Tint) with ▲or▼ key. Adjust the data with + or – key for 14.
- Select No. 50 SSH (Sub Sharpness) with ▲or▼key. Adjust the data with + or – key for 0C.
- Select No. 51 OPT (Option 1) with ▲or▼key. Adjust the data with + or – key for 04.
- Select No. 52 OPT2 (Option 2) with ▲or▼key. Adjust the data with + or – key for 80.
- Press the MENU key to turn off the Service Menu display.
This unit is equipped with a Power Failure Detector function included in the CPU which checks for an abnormal condition in the chassis power supplies, including the power supply derived from the Horizontal Output Transformer. If, while the power is on, a failure is caused by any of the following that results in a low voltage supply, the CPU will turn the unit off in 1.5 seconds to prevent unnecessary damage:
- Failure within the power supply circuits.
- A short circuit in the load side from the supply.
- Stoppage of the Horizontal Output Oscillator caused by the X-Radiation protection Hold-Down Circuit.
Check the following if the unit is turned off by the power failure detector.
- Disconnect the AC power cord (120V AC line) for at least 10 seconds.
- Connect a DC Voltmeter to the following TEST POINTS.
- Press the Power key and check for the proper voltage supplies.
- If any of these voltages is low, the power failure detector should turn the unit off within 3 seconds.
- Check all circuits listed above.
SMPS SCHEMATIC {Click on Schematic to Zoom In}
UNIVERSAL REMOTE CONTROL SET-UP CODES
With GE Universal remote control: 0049 0097 0110 0004 0268 0012 0108 0180 [625, 705]
With RCA RCR 311W: 1047, 1078, 1080, 1121, 1129, 1163
With RCA RCR 312W: 10054, 10154, 10159, 11142
With 6-in-one Super Remote Control: 017,062,063,093,120,121,182,193
With other remote controls: 1073 1079 1069 1072 1145 1423 10611178 1047 1171 1298 1316 1347 1349 1143 1157 1172 1208 1360 1024 1115 1052 1232 1046