No Operation, Power Led Off - NEC MultiSync V520 Service Manual
N0501 series
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Also See for MultiSync V520:
- Specification (1 page) ,
- User's manual and safety manual (33 pages)
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2. NO OPERATION, POWER LED OFF
POWER SW
TURN OFF
CHECK
F101
CHECK
Q101
CHECK
U101
U101 PIN6
PULSE O/P
POWER SW
TURN ON
1.
DC P/S O/P VOLTAGE SET AT 17V,CURRENT SET
AT 200MA. POSITIVE CONNECT TO C112"+".
NEGATIVE CONNECT TO C105"-".
2.
SCOPE SET AT 10V/DIV, 10US/DIV, PROBE
CONNECT TO Q101-GATE AND C105"-".
CHECK
U101 PIN 7 VCC
NO
PIN 4 SAWTOOTH
PIN 8 5V
FAILURE
R111, ZD101
33
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