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ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
No -12V
YES
Is the voltage 0f
C963 -12V
YES
Is the IC962 pin2
12V?
YES
Check or Replace the Q965
No VF+
YES
Is the ZD960/961
Normal?
YES
Replace the R981 or Q962, Q963
NO
Check or Replace the D963
NO
Check the PWR CTL
"H" signal from u-com
NO
Replace the ZD960/961
3-12
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Table of Contents
Troubleshooting
