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A complete and very usefull service manual with all details.
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Text excerpt from page 15 (click to view)
IC301 Troubleshooting
Check the power supplying IC301 Pin 17, 54, 90? NO YES Check the 5V of IC301 pin 26 NO YES Check the oscillation of X301 NO YES When power supplying to IC301 pin11. (Low � High) NO YES Replace the IC301 Check the RESET circuit Replace the X301 Check the P-SENS Refer to �Power Circuit Troubleshooting�
IC400 Troubleshooting
Check the power supplying to IC400 pin24 NO YES Check the CLK Data of IC400 pin 21, 22 YES NO Check the PIN of MICOM 4, 5 Refer to �IC301 Troubleshooting� Check the pattern of MICOM (4, 5)- IC400 (21, 22) NO Refer to �Power Circuit Troubleshooting�
Check the waveform output of IC400 pin 8, 10 NO YES Check the waveform input of IC400 pin9, 11 YES Replace the IC400 Replace the IC400
