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6.2 Dismantling, English
Dismantling, English 6.3
Replacement of Main chassis, module 999
- Disconnect mains voltage.
- Discharge the picture tube. See
8.
In order to avoid electric shock, the picture tube must be discharged.
Wait for minimum 30 sec. after the mains supply has been removed before
discharging the picture tube.
- Remove the high voltage cable from the picture tube, marked B. See
8.
- Remove PCB32 to gain access to cables connected to PCB14 and 6IC6.
Disconnect 14P17 and 32P411.
Loosen the 2 screws and remove PCB32. See
10.
- Disconnect the plugs at 14P10, 14P11, 14P90, 14P91, 14P20, 14P18, 14P493,
14P492, 14P431, 14P471. See
10.
- Disconnect the plug at 2P430. See
15.
- Disconnect the plug 1010 (disconnect 1010 by pressing the small “lock” towards
the plug and at the same time pulling the plug outwards) and 1009 on the PCB
mounted on the deflection coil on the picture tube. See
8.
- Remove the ground lead from the picture tube, marked A. See
8.
- Disconnect 9P192 and 3P40. See
8.
Carefully loosen PCB3 from the picture tube.
- Disconnect the GND leads placed under the plastic cover. See
11.
- Place the main chassis in service position.
- Disconnect 2P430, 4P44, 4P45 and 4P46, which are placed inside the chassis.
Open the chassis frame and remove the lead (from 4P46) and the GND lead from
the chassis. See
15.
- Close and remove the chassis.
- Transfer the EEPROM 6IC6 from the chassis to the new chassis.
Remount the optional modules in the new chassis. See
16.
- Place the new chassis in the TV and reconnect 2P430, 4P44, 4P45 and 4P46 inside
the chassis. See
15.
- Close the chassis. Ensure that no leads are caught between the chassis and the TV.
- Reconnect all leads to the plugs as before. Ensure that all leads are connected.
Reconnect the ground lead on the picture tube. Mount PCB3 on the picture tube.
Remember to reconnect 9P192 and 3P40. See
8.
- Perform the necessary adjustments as described under Adjustments:
Horizontal centre adjustment, G2 adjustment, Focus adjustment and Geometry
adjustment.
ABO-CENTER
v/HENRIKSENS
ELEKTRONIK