Read Sharp LC-20B5E (serv.man6) Service Manual online
12
LC-20B5E
»
Precautions in servicing the B side (backside) of the main PWB unit
1. Disconnect the FFC (flat cable) from between the main PWB (SC1204) and the liquid crystal panel, and then
connect the service-specific extension FFC (flat cable) (QCNW-A556WJZZ).
2. Disconnect the FFC (flat cable) from between the main PWB (SC1201) and the liquid crystal panel, and then
connect the service-specific extension FFC (flat cable) (QCNW-A555WJZZ).
3. Disconnect only the SC1202 of the FFC (flat cable) from between the main PWB (SC1202) and the liquid crystal
panel, and then connect the service-specific extension FFC (flat cable) (QCNW-B784WJZZ).
4. Disconnect the P701 side of the lead from between the main PWB (P701) and the analog PWB, and then
connect the service-specific extension cord (QCNW-C086WJQZ).
5. Disconnect the FFC from between the main PWB (SC2001) and the analog PWB (SC3403), and then connect
the service-specific extension FFC (flat cable) (QCNW-A556WJZZ).
6. Disconnect the lead from between the main PWB (P2006) and the analog PWB (P1601), and then connect the
service-specific extension cord (QCNW-C498WJQZ).
7. Remove the lock screws from the main PWB, detach the PWB from the chassis frame, and then turn it over to
service.
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Precautions in servicing the inverter PWB unit (backside)
8. Remove the wire holder, and disconnect the connecting cable.
9. Disconnect only the P3703 side of the lead from between the inverter PWB (P6706) and the analog PWB
9. Disconnect only the P3703 side of the lead from between the inverter PWB (P6706) and the analog PWB
(P3703), and then connect the service-specific extension cord (QCNW-C086WJQZ).
10. Remove the lock screws from the inverter PWB, detach the PWB (be careful not to get close to the high-tension
area and its surrounding conductive parts), and then turn it over to service.
CN2
SC1202
P701
SC1201
SC3403
P6706
P3703
SC1204
SC2001
CN3
P1601
P2006
P3704
Main PWB
Wire holder
Inverter PWB
4
5
6
2
1
3
9
Analog PWB
Inverter
PWB
(Side-B)
7
10
Main PWB
(Side-B)
8
Step
Part No.
Description
1
QCNW-A556WJZZ
Extension Cable 50-pin Main (SC1204)-LCD panel
2
QCNW-A555WJZZ
Extension Cable 20-pin Main (SC1201)-LCD panel
3
QCNW-B784WJZZ
Extension Cable 30-pin Main (SC1202)-LCD panel
4
QCNW-C086WJQZ
Extension Cable 10-pin Main (P701)-Analog (P3704)
5
QCNW-A556WJZZ
Extension Cable 50-pin Main (SC2001)-Analog (SC3403)
6
QCNW-C498WJQZ
Extension Cable 15-pin Main (P2006)-Analog (P1601)
9
QCNW-C086WJQZ
Extension Cable 10-pin Inverter (P6706)-Analog (P3703)
