Basic Troubleshooting Guide; Basic Troubleshooting Guide For Dvd Module - Panasonic SA-HT640WP Service Manual

20 Basic Troubleshooting Guide

20.1. Basic Troubleshooting Guide for DVD Module

20.1.1. Firmware and Key Download
Problems
1) Firmware downloading
fails
2) CPPM/CPRM key
download fails
Checking Points
a) Check supply voltages on ICs pins
b) Check Oscillation frequency and level
c) Check reset signal and power voltage rise time
d) Check Flash ROM address and data bus
e) Check SDRAM addresand data bus, CLK and
other control signals waveform
f) Check EEPROM CLK & data line
*Compare the above with OK condition
Module
Checking components
IC8111, IC8651, IC8001, IC8051, IC8151
X8621 , C8621 , C8622 , R8621 , R8622
IC8601
IC8651
IC8051
IC8611
*Check for solder short and/or
component missing/damaged
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SA-HT640WP / SA-HT640WPC