HP w19 - Widescreen LCD Monitor, Руководство по обслуживанию

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19" LCD Color Monitor HP W19
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2. Panel Power Circuit
3. Inverter Control Relative Circuit
4. U4-Data Output
Check C509 should have response from 0V to 5V
When we switch the power switch from off to on
Measured X601 waveform is normal?
OK
Check Q204, Q203 is broken or CN503 solder abnormal?
Replace Q204, Q203 or re-solder CN503
OK
NG
Replace U601
Replace X601
(24MHz)
Replace Panel
NG
NG
OK
NG
Check the Bklt-On relative circuit, R201, Q201,
In normal operation, when LED =green,
Base of Q201 should =0 v,
In saving mode, when LED=orange,
Base of Q201 should =5 v,
OK
Replace Power board
& Re-do white balance
Measured the inverter connector
CN602
Pin1 on/off control=5V (on)
Pin2 PWM signal control dim 0V-5V
Replace U201
OK
Measured X401 waveform is
normal?
Check TSU56AK (U401)
Signal output (PIN102-103, 106-113,118-125,128,1)
Is the waveform ok?
Replace X401(14.318MHz)
Check HS/VS input signal are normal?
OK
Replace U401
OK
OK
Check relative component
NG
NG
Check relative circuit to panel
NG