Trouble Shooting - Olivetti ECR 7900 Service Manual
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Also See for ECR 7900:
- Bruksanvisning (62 pages) ,
- User manual (62 pages) ,
- Installation and reference manual (22 pages)
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POWER SUPPLY CIRCUIT continued
D15
A
K
1SR 154-400
EC 18
+
R199
10K
470uF_50V
F1
HVPSW
TR-5 19 370 1 .6A
TP5
Vin1
Vin1
DB 1
F2
MRT 3.1 5A
L
N
C136
CN12
C137
RS402
*ER ZV05D390
0.01uF_film
1
2
3
4
5
6
7
EC13
B7P -SHF-1AA
R1 03
+
R1 74
10K
3.3 K
100 uF_6 3V
F5
D4
K
A
TR-5 19 370 0 .5A
1SR154-400
F4
TR-5 19 370 1 A
R1 81
ZD9
R1 83
C1 39
470
56K
TP 10
0.1 uF_50 V
VS
RD5.6EB 1
R1 82
470
Trouble shooting
- STEP 1
Check the voltage (DC +5.0V) at point (1).
If it does not output properly - - - Check FUSE F2 & F3 continuity and replace it if OPEN.
Check the voltage (DC +3.3V) at point (2).
If it does not output properly - - - Check FUSE F2 & F3 continuity and replace it if OPEN.
Check the voltage (DC +3.3V) at point (2).
If it does not output properly - - - Check FUSE F2 & F3 continuity and replace it if OPEN.
Check the voltage (DC + 7.6V) at point (4).
If it does not output properly- - - Check FUSE F1&F2 continuity and replace it if OPEN.
Check the voltage (DC +24V) at point (5).
If it does not output properly- - - Check FUSE F1 continuity and replace it if OPEN.
Check the voltage (DC -28V) at point (6).
If it does not output properly- - - Check FUSE F5 continuity and replace it if OPEN.
Check the voltage (AC 3.9V) at point (7).
If it does not output properly- - - Check FUSE F4 continuity and replace it if OPEN.
- STEP 2
After replacing FUSE at STEP 1 but the FUSE opens again.- - - Replace Main board.
No voltage at all the points from (1) to (7). - - - Replace Transformer.
22
R102
10K
B
Q8
2SA1036K
HT1
GO T-45 40-SP L
Q1 0
2SD1415 A
C
R136
R169
4.7K
2.2K
Q9
C25
ZD7
B
DTC143EKA
0.1uF
RD9.1EB 2
U9
8
Qo
7
F3
D3
FB 10
Ipek
A
K
6
Vin
5
EX CELS A35
TR-5 19 370 1 .6A
1SR154-400
Vref
M5 291FP
R1 76
R1 04
EC14
EC15
+
+
3.6 K_F
100 uF_5 0V
10K
R1 75
1.1 K_F
GN1
GND-ONE_POINT
ZD8
RD30EB 3
(6)
PG
TP 6
-Vp w
C
E
-Vpw
Q1 2
2SA 1284 D
R1 84
VF1
0(3 225)
TP 13
VF1
(7)
TP 12
VF2
R1 85
VF2
ECR 7900 Service Manual
(5)
TP2
VDRW
VDRW
(4)
TP3
VPRN
VPRN
(+7.6V)
E
EC11
R1 40
+
1K
100 uF_1 6V
PG
R1 31
100
Q1 1
R1 77
1
B
SC
2SB 1455 R
2
300 _1W
SE
3
Co
4
GND
SF-T8-4 0S-P F
L1
C1 38
EC16
+
100 0uF_ 16V
330 pF
D1 1
EC31QS 06
D1 2
A
K
EC31QS 06
EC12
+
(1)
100 uF_1 6V
D1 3
A
K
EC31QS 06
TP7
R1 78
U1 5
R1 80
VC C5
BA 00CC0WFP
VCC5
3
4
FB 11
N.C.
Vout
4.3 K_F
2
*3.9 K_F
Vin
1
5
EX CELS A35
CTL
ADJ
C2 6
0.1 uF
R1 79
C2 7
2.2 K_F
0.1 uF
Y108540-8
(2)
TP8
VC C3
VCC3
TP9
(3)
VB B
VBB
EC 7
EC
+
+
10uF_16V
10
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Troubleshooting
