Trouble Diagnosis - Bosch B26FT70SNS Repair Manual

8. TROUBLE DIAGNOSIS

8-1. Faulty Start (F/R lights OFF , F-PCB Power OFF)
Power input to
Main PCB is ok?
Main PCB Fuse is
disconnected?
(DC12V/15.5V/5V) on
Main PCB is OK?
Wire connection
of Front PCB is OK?
Checkup and connect
Front PCB wires.
※ How to disassemble Front PCB Ass'y
1)
1) Unscrew (1 points) to remove Front PCB.
2) Pull out 2 connector (8pin & 2pin) from Front PCB Ass'y. (Do not hold only wires to pull out.)
3) Unscrew (5 points) to remove Front PCB.
* Follow the reverse order when assembling.
Start
Y
N
Voltage
Y
N
2)
N
Y
N
Y
3)
36
Check power connection
from machine compartment
to CN1 of Main PCB.
Change the fuse
(AC250V 4A)
(on the Main PCB)
Change Main PCB
Change Front PCB AS.