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3.2.1.2. About Main P.C.B. (Ref. 1) & Flash-ROM (IC9999)
Important:
1. Before exchanging the “MAIN P.C.B.”, the performances must be carefully checked, by following the “7.Troubleshooting
Guide” section of this service manual.
2. Before replacing the “MAIN P.C.B. and/or Flash-ROM”, proceed the EEPROM data backup from the unit.
After replacing the MAIN P.C.B. and/or Flash-ROM, overwrite the EEPROM data with backup data from the unit first, then pro-
ceed the adjustment /inspection.Refer to the adjustment instruction in the adjustment software for details.
3. The full adjustment must be performed after replacing the “MAIN P.C.B. and/or Flash-ROM”, otherwise Picture quality can not
be met with specification.
3.2.1.3. About EXT MIC P.C.B. (Ref. 58)
2 varistors:VA4403 & VA4404 are installed on the EXT MIC P.C.B. as follows.
Please note when they are exchanged.
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