TO ENTER SERVICE MODE
After replacing the IC202 (Memory) or Main CBA, the set value in IC202 (Memory) will be lost. So it is necessary to set up or adjust in the Service mode after its replacement.
- Turn the power on. (Use main power on the TV unit.)
- Press [STANDBY/ON], [2], [7], [1], and [MUTE] but-tons on the remote control unit in that order within 5 seconds.
- To cancel / [EXIT] the service mode, press [STANDBY/ON] button on the remote control.
- Enter the Service mode.
- Press the [STATUS] button on the remote control unit. The option code appears on the display.
- If needed, input the option code (0129) using number buttons on the remote control unit.
- To reset the software, press [PAUSE] and [5] buttons on the remote control unit. The option code is changed.
Purpose: To obtain correct operation.
Symptom of Maladjustment: The picture is dark and unit does not operate correctly.
- Connect the unit to AC Power Outlet. (exact AC230V)
- Input a color bar signal from RF (or Ext.) input and leave it for at least 20 minutes.
- Connect DC Volt Meter to TP503(+B) and TP504(GND).
- Adjust VR601 so that the voltage of TP503(+B) becomes +105±0.5V DC
Purpose: To adjust the beam current of R, G, B, and screen voltage.
Symptom of Maladjustment: White color may be reddish, greenish or bluish.
Screen Control (FBT) --- H.V./Power Supply CBA FBT= Fly Back Transformer
- Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.
- Set the screen control to minimum position. Input the Black raster signal from RF (or Ext.) input.
- Enter the service mode. Dimmed horizontal line appears on the CRT.
- To enter the C/D/S mode, press the [VOL-] button on the remote control unit.
- To enter the CUT OFF (R) mode, press [1] button on the remote control unit.
- Turn the screen control up until dimmed horizontal line appears.
WHITE BALANCE ADJUSTMENT
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.
Note: Confirm that Cut Off Adj. is correct after this adjustment, and attempt Cut Off Adj. if needed.
- Operate the unit more than 20 minutes.
- Face the unit to east. Degauss the CRT using Degaussing Coil.
- Input the White Raster (APL 100%).
- Set the color analyzer to the CHROMA mode and after zero point calibration, bring the optical receptor to the center on the tube surface (CRT).
- Enter the Service mode. Press [VOL-] button on the remote control.
- Press [4] button on the remote control unit for Red adjustment. Press [5] button on the remote control unit for Blue adjustment.
- In each color mode, Press [PROG+/PROG-] buttons to adjust the values of color.
- Adjusting Red and Blue color so that the temperature becomes 8500K (x : 290 / y : 300) ±3%.
- At this time, Re-check that Horizontal line is white. If not, Re-adjust Cut-off Adjustment until the Horizontal Line becomes pure white.
- Turn off and on again to return to normal mode. Receive APL 100% white signal and Check Chroma temperatures become 8500K (x : 290 / y : 300) ±3%.