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Flow Chart of Troubleshooting
10-12
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10-3. SPEAKER Working
7, 9 Pin in U407
Signal ON ??
Check PIN 6, 10 in U407,
C477, C478
Y18, V21 Pin in UCP
Signal ON?
Operator Speaker
SPK-Assy's Breakdown?
Check PIN 5, 8 in UCD 402
Change SPK-Assy's
No
No
No
Yes
No
No
Yes
Yes
12, 14 Pin in U402
Signal ON ?
Check L404, L405
Yes
END