Epson Stylus Color 980 Service Manual

EPSON Stylus Color 980 Revision A
Operating Principles Electrical Circuit Operation Principles 56
Figure 2-10. C265 PSB/PSE Board Circuit Block Diagram
L
N
F1
R1
C1
TH1, TH 2
L1 C3,C4
C2
DB1
C
T1
Q1
PC1
Q2
Q3
+42V/0.8A
GP
+42
+42
+42
GP
ZD 51,
ZD 81-86
C 51,52
+5V /1.5A
GL
+5
PSC
+5
+5
GL
7
L51
OSC
5
C54
+
ZD53
ZD52
ZD87
L4960
(IC 51)
1
In
Q84
C84
+
Out
R28
300 K
Q31
C13
+5 V R egulator
D51
In c o m in g c u rre n t p ro te c tio n
H igher harm onics absorption
Sm oothing
Full w ave rectification
In ru s h c u rre n t te m p e ra tu re c o n v e rs io n
Starting resistor
H igher harm onics absorption
Sm oothing
5V line overvoltage protection
Sm oothing
42 V line constant voltage control
4 2 V lin e o v e rv o lta g e p ro te c tio n
Voltage drop delay circuit at pow er off
C om es on w hen abnorm al.
Photo C oupler
Feed
back
Main
S w itc h in g
Feed
b a c k

Epson Stylus Color 980 Specifications

General

Brand	Epson
Model	Stylus Color 980
Category	Printer
Language	English