3
Trouble Mode
SC Floating voltage SOS
Defective Board (possibility)
SC, SU, SD, Panel, D
Precautions:
1. Disconnect AC Power prior to making any disconnection or connection
2. When ordering PC boards, use manufacturer ID number to confirm correct model number. Models
TH-42PZ77U, TH-42PZ700U, and TH-42PZ700UA are similar but their boards part numbers are
different.
3. Upon completion of repair, perform “D Board Firmware Upgrade” according to the instructions in
Service Hints SH-B34-08-01 for model TH-42PZ700U and SH-B34-08-02 for models TH-42PZ77U and
TH-42PZ700UA. http://www.pasctraining.panasonic.com/firmware
4. Make sure all the connectors on the SU, SD, SC, and the P board are not loose and are seated
properly.
5. It’s not necessary to remove the Panel’s Flex-cables from connectors SU1~SU4 on the SU board or
SD1~SD4 on the SD board when both the SU board and the SD board are isolated.
6. Before connecting P2/SC2 or P11/SS11, discharge is necessary to prevent potential shock caused by
VSUS.
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