93
7521
7521
N/B MAINTENANCE
N/B MAINTENANCE
Symptom:
Symptom:
When the power button is pressed, nothing happens, no fan activi
When the power button is pressed, nothing happens, no fan activi
ty is heard and power indicator is not light up
ty is heard and power indicator is not light up
.
.
7.1 NO POWER:
CONTINUE
2. Check the power source
from AC adapter. (PJ501)
POWER
OK?
END
NO
YES
If “D/VMAIN”
failure.
If “VCC_CORE”
(CPUVCC)
failure.
If “+S12V, +S5V_P
or +S3V_P” failure.
If “1.5V, 1.8V”
Failure.
If “VDD5”
failure.
CHECK: PD1,PD3,PL4,PC16,PR20,PR21
PQ12,PU8,PC15,PC33…….
CHECK: PL5,PU14,PU5,PU10,PU6,PU11,
PU7,PU12,PD7,PL8,PR29,PR44,
PC50,PC49,PC48,PC47,PC46….
CHECK : PU9,PQ7,PQ9,PL502,PD501
PU501,PR4,PQ502,PQ503,
PL501,PR2,PD6,PD505…….
CHECK: PU13,PU3,PU4,PD9,PD10,PD5
PD6,PL6,PL10,PR30,PR34….
CHECK : PD2,PD4,F5,U32,C235......
PL1
PF1
PC3
PC4 PR12 PR14
PD502 PR11 PD1
PU1 PR10 ……..
SIGNAL: PARTS:
ADINP
LEARING
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