Sharp LC-20B4M Service Manual page 11

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.
Step
1 QCNW-A556WJZZ
2 QCNW-A553WJZZ
3 QCNW-A556WJZZ
4 QCNW-A555WJZZ
5 QCNW-B194WJZZ
Main PWB
6
(Side B)
3
SC1203 SC1202 P2001
4
2
Main PWB
SC1204 SC2002
5
P701
Part No.
Extension Cable 50-pin Main (SC2002)-Tuner (SC3403)
Extension Cable 30-pin Main (SC1204)-LCD Panel
Extension Cable 50-pin Main (SC1203)-LCD Panel
Extension Cable 20-pin Main (SC1202)-LCD Panel
Extension Cable 12-pin Main (P701)-Tuner (P3701)
1
SC3403
Tuner PWB
P3701
Description
11
LC-20B4M