Service manual

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