Service manual

3-8
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
(1) No 5.0VA
Check or Replace
the D121.
NO
Check PWR CTL “H”
signal of µ-COM.
NO
YES
YES
YES
(2) No 5.4V
NO 5.0VA.
Is the F101 normal?
Is the TH01
normal?
Is the BD101
normal?
Is Vcc (14~22v) approved
to IC101 PIN3?
Are the D121
normal?
Does about 2.5V
appear to IC103 PIN1?
Is the D125/D126
normal?
Is the D123/D124
normal?
Replace the F101.
(Use the same Fuse)
Replace the
BD101.
Replace the TH01.
Is the D102
normal?
Check or Replace
the D102.
Replace the D121.
Replace the IC103.
Replace the
D125/D126.
Replace the
D123/D124.
Is Vcc (5.6v) approved
to Q151 Emitter?
Is Q152 Collector
is GND potential?
Check or Replace
the Q151.
Main PCB power short.
NO 5.4V.
2) POWER(SMPS) PART