6-22 Troubleshooting and Repair
Printer Port Interface Check
Audio Port Interface Check
14
Check BIOS Setup
Enter Correct Printer
Mode
Check Data Bus
Check RP39, RP41,
R318
Check Busy Signal
Check RP41
Pin 3, Pin 14
Check U27
(FDC37N769)
END
NO
YES
NO
NO
YES
YES
15
Check Audio Board
Power
Check U7 Q11
Check Audio Amp
Signal
Check U5
Pin 3, 10, 15, 22 signal
Check AC97 signal
Check U6
Pin 24, 23, 35, 36
Check MIC
Check U6 Pin 21
END
NO
YES
NO
NO
NO
YES
YES
Check MIC Amp
Check U3 Pin 1, 2
signals
NO
YES
YES