Star Tech Journal

16
STAR*TECH JOURNAL/APRIL 1983
TAITO
TROUBLESHOOTING CHART FOR FMP001 SWITCHING REGULATOR
Procedure: This troubleshooting procedure should be done in a ne>-load condition with the B-connector unplugged.
You will be looking for short circuits except where noted.
OUTPUT
FAILURE
ON +sv
YES
THE FS-FUSE (6A)
WILL BE
INSTANTLY CUT
NO
YES
THE VOLTAGE IS
LOW, OR NO
VOLTAGE APPEARS.
YES
,I/
l/
.,,J
NO
YES
~
D24
r--1
06
(C1384)
I
I
I
~
IC2
(u PC311C) MAINLY BETWEEN PIN 4 AND PIN 8
~
C20-C23, C38 OR C41
,I
'I 06
' ,
THE F4-FUSE
(1A) Will BE
INSTANTLY CUT.
J,NO
THE VOLTAGE IS
LOW, OR NO
VOLTAGE APPEARS
YES
THE VOLTAGE
IS TOO LARGE
.l, NO
THE VOLTAGE
CAN NOT BE
ADJUSTED.
YES
YES
(C1384) WIRING CUT OR BAD SOLDERING
I
I
~
I
I
I
I
IC2
C15
(PC311C)- DEFECTIVE
(C945)
(100uF 18V) IS DEFECTIVE OR BAD SOLDERING
'
'I IC2 (uPC311) BETWEEN PIN 2 AND PIN 3
-.J
1
,J
Ll
J, NO
(2200u 1 OV) IS DEFECTIVE
I
I
H
YES
(RD5.1E)
~ 07 (C945) WIRING CUT OR BAD SOLDERING
V
YES
I
D16 (15SB4S)
~
THE VOLTAGE
CAN NOT BE
ADJUSTED.
I
~
~ as
OUTPUT
FAILURE
ON -SV
(NE555) BETWEEN PIN 1 AND PIN 8
I
YES
THE VOLTAGE
IS TOO LARGE.
\I/
I
D13 (RD5.1E)
~
NO
'/
IC3
(RD7.5E)
~ C24 (2200uF 1 OV)
'V
,v
'l D27
~
NO
, /
,1
R54
(1 K.flVR) NO CONNECTION OF CENTRAL TERMINAL
I
D10
(RD5.1E)
I
C19
(100uF 16V)
I
D15
(CTU-22S)
I
C16, C17
(2200uF 16V) IS DEFECTIVE
,I 010 (D880)
I
09
(C1384)
I
I
'I
011
(C945)
I
~
012
(C945)
I
~
,1
~ D19 (RDS.1 E)
I
R41
~
(100.0VR) NO CONNECTION OF CENTRAL TERMINAL, OR
BAD SOLDERING