TO ENTER SERVICE MODE
- Turn the Power ON, by its front panel Power Switch.
- Enter TV mode, and press "Ch Up" or "Ch Dn" button on TV unit, and press "Disc Menu" button on the remote control. Version of the microcomputer will be displayed.
DC [114V] ADJUSTMENT.
- Connect the unit to AC power outlet.
- Connect DC volt meter to J553(+B), and heat sink on HV CBA or to Ground.
- Adjust (VR2601) so that, the voltage of J553, becomes 114V+/-0.5V.
HOW TO MAKE A SERVICE REMOTE CONTROL UNIT
- Prepare remote control unit [ID No.NE206UD; part number [4835 218 37345]. remove four screws from the back side.
- Cut Off pin number (10) of the remote control processor, and short circuit pins [10 & 17] of the microprocessor with a jumper wire.
VERTICAL SHIFT ADJUSTMENT.
- Enter the service mode. Press (9) button on the service remote control unit and select [V-P] mode.
- Input a monoscope pattern.
- Press Ch Up or Ch Dn buttons on the service remote control so that, the top and bottom of the monoscope pattern are equal to each other.
HORIZONTAL SHIFT ADJUSTMENT
- Enter the service mode.
- Press "8" button on the service remote cotnrol, and select the ]H-P] mode.
- Input a monoscope pattern.
- Press Ch Up or Ch Dn buttons on the remote control so that the left and right side of the monoscope pattern are equal to each other.
- Turn the Power OFF and ON again.
HEAD SWITCHING POINT ADJUSTMENT
- If this adjustment have misaligned, cause head switching noise or vertical jitter in the picture.
- Play back Test Tape [VFMS 0001H6]
- Enter service mode; and press "5" button on the service remote control.
- The head switching position will displayed on the screen. If adjustment is necessary: press CH UP or Ch DN buttons on the remote control. The value will be changed in 0.5H steps Up or Dn. Adjustable range is up to [9.5H]. If the value is beyond the adjustable range, the display will change as [Lower output of range: 0.0H, Upper out of range: -.-H]
- Turn power OFF again
