7. POWER AMP PART CHECK
POWER AMP PART CHECK
Refer to SMPS troubleshooting.
NO
Check CN501
Pin10: 12 V
Pin1,2,3: 48 V.
YES
YES
Check IC701
Pin25, 26, 55, 56 input voltage.
YES
Check each line resistor output voltage.
NO
Check IC700
Pin2, 6, 55: 12 V.
Check IC700 Pin28, 29, 52, 53 input voltage.
Replace the coil.
NO
Check output
line coil.
Check IC700 Pin4, 5 input voltage.
YES
YES
YES
YES
OK
3-20
ELECTRICAL TROUBLESHOOTIHG GUIDE
Содержание OM5541
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Страница 58: ... TOP VIEW 3 61 3 62 BOTTOM VIEW 2 MAIN P C BOARD ...
Страница 59: ...3 63 3 64 TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW 3 FRONT_KEY USB P C BOARD 4 FRONT_VFD P C BOARD ...
Страница 60: ... TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW 5 FRONT_KEY PTB P C BOARD 6 FRONT_MIC P C BOARD 3 65 3 66 ...
Страница 61: ... TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW 7 SPK_LED P C BOARD 8 X_LED RCU2 P C BOARD 3 67 3 68 ...