Friday, February 20, 2015

SONY KV-32FX20A - KV-32FX20B - KV-32FX20D SERVICE MODE AND POWER SUPPLY CIRCUIT

SONY KV-32FX20A - KV-32FX20B - KV-32FX20D

CRT TV


SERVICE MODE AND POWER SUPPLY CIRCUIT

SERVICE MODE 
Service adjustments to this model can be performed using the supplied Remote Commander RM-887.
1. Turn on the main power switch and enter into the stand-by mode.
2. Press the following sequence of buttons on the Remote Commander.
ON SREEEN DISPLAY > 5 > VOLUME + > TV
‘TT--’ will appear in the upper right corner of the screen. Other status information will also be displayed.
3. Press ‘MENU’ on the remote commander to obtain the following menu on the screen.
4. Move to the corresponding adjustment using the button on the remote commander.
5. Press the + button to enter the selected adjustment.
6. Turn off the power to quit the service mode when adjustments have been completed.
B/G, D/K, I & L I.F ADJUSTMENT
1. Input an off air signal of between 60-100dBuV / 75 ohm terminated, via the tuner socket.
2. Enter into the ‘IF Adjustment’ service mode [i.e ‘TT59’] to fix the I.F frequency to 39.9MHz.
3. Enter into the service mode and select ‘Current TV status’.
4. Adjust the I.F coil [LV01] until the ‘AFT Status’ indicates a Window’ condition.
L BAND 1 I.F ADJUSTMENT
1. Input an off air signal of between 60-100dBuV / 75 ohm terminated, via the tuner socket.
2. Enter into the ‘IF Adjustment’ service mode [i.e ‘TT59’] to fix the I.F frequency to 34.2MHz.
3. Enter into the service mode and select ‘Current TV status’.
4. Adjust the RV02 control until the ‘AFT Status’ indicates a ‘Window’ condition.
TUNER AGC ADJUSTMENT
1. Receive a signal of 63dBuV / 75 ohm terminated, via the tuner socket.
2. Measure the voltage at test point 1 [A Board].
3. Adjust RV01 control to obtain a voltage of 3.0V +/- 0.3V.
DEFLECTION SYSTEM ADJUSTMENT
1. Enter into the ‘Geometry Adjustment’ service menu.
2. Select and adjust each item in order to obtain the optimum image.
‘TT’ TEST MODE :
‘TT’ Mode is available by pressing the Test key twice. It is exited by pressing 0 twice, or by pressing the Test key, or by pressing the TV key, or by pressing the TV key, or by switching the set into standby.
‘T’ TEST MODE :
‘T’ Mode is available by pressing the Test key once. It is exited by pressing the Test key twice, or by pressing the TV key, or by switching the set into standby.
POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN