KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
90
TROUBLE SHOOTING
3-2-4. NO POWER: DDCONs check
START
Check Vdd
C9118
Is voltage >5V?
Change IC9018
Yes
No
END
Check Enable pin
voltage
Is voltage >2.5V?
1.2 No Power U-Com Failure
Change Fuse
No
No
START
Yes
Change DDCON IC
Check fuse
F9xxx
Is fuse OK?
Check Vcc voltage
C9xxx
Is voltage >12.0V?
Check POWER_ON P-on ucom #pin19
(Refer 1.2 No Power U-Com Failure)
No
Yes
Yes
3-2-3. NO POWER: DC_OFF_DET check