Service manual

11
LC-20B4M
Precautions at the time of the side B(back) service of digital unit.
1. Remove only SC2002 of the FFC for connection between Main unit (SC2002) and Tuner unit(SC3403), and con-
nect the extended cable (QCNW-A556WJZZ) for service.
2. Remove the FFC for connection between Main unit (SC1204) and LCD panel unit, and connect the extended
cable (QCNW-A553WJZZ) for service.
3. Remove the FFC for connection between Main unit (SC1203) and LCD panel unit, and connect the extended
cable (QCNW-A556WJZZ) for service.
4. Remove the FFC for connection between Main unit (SC1202) and LCD panel unit, and connect the extended
cable (QCNW-A555WJZZ) for service.
5. Remove only P701 of the Connecting Cord for connection between Main unit (P701) and Tuner unit (P3701), and
connect the extended cable (QCNW-B194WJZZ) for service.
6. Remove the main unit fixing screws (3 pcs.), a substrate is reversed.
Main PWB
(Side B)
1
2
4
5
3
6
SC2002
SC3403
P701
SC1204
SC1203
SC1202
P2001
P3701
Tuner PWB
Main PWB
Step Part No. Description
1 QCNW-A556WJZZ Extension Cable 50-pin Main (SC2002)-Tuner (SC3403)
2 QCNW-A553WJZZ Extension Cable 30-pin Main (SC1204)-LCD Panel
3 QCNW-A556WJZZ Extension Cable 50-pin Main (SC1203)-LCD Panel
4 QCNW-A555WJZZ Extension Cable 20-pin Main (SC1202)-LCD Panel
5 QCNW-B194WJZZ Extension Cable 12-pin Main (P701)-Tuner (P3701)