Epson 2070 Service Manual - Page 45

MAIN Board Assembly, Bridge, Trensformaer, Switching Regulator - lq driver

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Product Description LQ-2070 Service Manual 1.6.1 C186 MAIN Board Assembly The C186 MAIN board consists of a TMP96C041AF CPU, an E05B13 gate array, a program/CG ROM, a PS-IWM, an EEPROM, etc. Head Driva TRANSISTOR IC 5 PS RAM ICI 1,14 PF Motor Driver TEA3718SDP 1 1 ~n D .H / \ IC12 CR Motor Driver SLA7024M IC 8 'CN2 for Option I I F EEPROM Figure 1-13 C186 MAIN Board Assembly 1.6.2 C166 PSB/PSE Board Assembly These boardshave two AC input voltage ratings: 120VAC (C166PSB) and230VAC (C166PSE). Both boards consist of a transformer, switcking FET, regulator IC, diode bridge, etc. The power supply board provides +5 VDC and +35 VDC for the main board and printer mechanism. F1 Q1 Fuse Switching FET I 1. /- w 'CIkDE,D l I I o Pcl Photo Coupler / / / / 1/ .- - C!!!!!o0 ; IC52 OP-amp n 1 1 \ r\ rA / DBI Diode Bridge Ti Trensformaer 1/51 Switching Regulator TL494CN Figure 1-14 C166 PSB/PSE Board Assembly 1-36 Rev.A

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Product Description
LQ-2070
Service Manual
1.6.1
C186
MAIN Board Assembly
The
C186
MAIN board consists of a
TMP96C041AF
CPU, an
E05B13
gate array, a
program/CG
ROM, a
PS-IWM,
an
EEPROM,
etc.
Head
Driva
ICI 1,14 PF Motor Driver
TRANSISTOR
TEA3718SDP
1
IC
5 PS RAM
1
~n
D
.H
/
\
IC12
IC
8
‘
CR Motor Driver
EEPROM
CN2 for Option
I
I
F
SLA7024M
Figure 1-13
C186
MAIN Board Assembly
1.6.2
C166
PSB/PSE
Board Assembly
These boardshave two AC input voltage ratings: 120VAC
(C166PSB)
and230VAC
(C166PSE).
Both boards consist of a transformer,
switcking
FET, regulator IC, diode bridge, etc. The power
supply board provides +5 VDC and +35 VDC for the main board and printer mechanism.
F1
Q1
Pcl
IC52
Fuse
Switching FET
Photo Coupler
OP-amp
I
I
/
/
‘CIkD
El
,
D
o
C!!!!!;
o
0
n
1.
/
/
/-
w
I
1/
.-
-
1
1
\
r
\
A
r
/
DBI
Ti
1/51
Diode
Bridge
Trensformaer
Switching Regulator
TL494CN
Figure 1-14
C166
PSB/PSE
Board Assembly
1-36
Rev.A