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4. Troubleshooting
4.1.1.
No Power
No powe r de te cte d
3.4 V output check
(CNM851, pin 13,14)
→ 3.4 V?)
Yes
Che ck MAIN AS S 'Y
- S pe cia lly che ck a round
MICOM IC. (Vcc)
4-2
Che ck input voltage
No
of ICM854 (katho de of DM854
→ 6 ~
Che ck diode s
(DM854 a nd DM853)
→ OK?
Che ck
inpu t voltage of ICM853 (Pin1)
→ 27 ~ 34 V?
Che ck Sw itch ing
IC (ICA801) s hort te st p in 8 to
pin 1, 2, 3, 4, 5, 6, 7 → OK
(means not sh ort)?
Che ck QA801.
a ll pins are n ot sh orte d to
e a ch othe r.
Che ck co mpone nts
a round IC. RA813, RA812, DA806,
DA807, DA808.
Che ck prima ry s ide .
Fu s e (FS801 S) →
Re place S MP S AS S 'Y.
Yes
13 V? )
No
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
OK?
Yes
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Re place ICM854.
Re place Diode .
Re place ICM853.
Re place ICA801.
Re place QA801.
Re place compone nt
if it ha s proble m.
Re place Fus e .
(6.3 A 250 V)
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