Service manual
AL-2030/2040CS/2050CS CIRCUIT DIAGRAM 13 - 31
4. OPERATION PWB (AL-2050CS)
LCDRS#
LCDDB7#
LCDDB4#
LCDDB6#
LCDRS#
LCDE#
LCDE#
LCDDB7#
LCDDB4#
LCDDB6#
LCDDB5#
LCDDB6
LCDDB7
LCDDB4
LCDDB5#
LCDDB5
5VEN
5VEN
3.3V
3.3V
5V
LED_V2
OP-CLK
OP-DATA
OP-LATCH
LED_V3
LED_V1
DATA1
LCDE
LCDRS
LCDDB[7..4]
LCDCONT
PSL
To LCD
FAXSCAN
COPY
PRINT SPFL
HPL SJAL
BPL
CS1L
CS2L
RPL
PSL
R333 100JR333 100J
TP14TP14
LTL-1LHG-002A
LED308
LTL-1LHG-002A
LED308
IC304
TB62725AF
IC304
TB62725AF
/OUT2
7
/OUT3
8
/OUT4
9
/OUT5
10
/OUT6
11
/OUT1
6
/OUT0
5
VCC
16
/ENABLE
13
/LATCH
4
S-IN
2
CLOCK
3
S-OUT
14
GND
1
/OUT7
12
R-EXT
15
TP1TP1
LTL-1LHG-002A
LED309
LTL-1LHG-002A
LED309
C323
open
C323
open
Q307
KRC106S
Q307
KRC106S
1
2
3
TP3TP3
TP5TP5
R302 100JR302 100J
C329
100p
C329
100p
R305
0J
R305
0J
R344
100J
R344
100J
LTL-1LHG-002A
LED311
LTL-1LHG-002A
LED311
TP15TP15
TP6TP6
C330
100p
C330
100p
LTL-1LHG-002A
LED301
LTL-1LHG-002A
LED301
R332 100JR332 100J
LTL-1LHG-002A
LED306
LTL-1LHG-002A
LED306
TP2TP2
R335 0JR335 0J
C332
100p
C332
100p
R325
0J
R325
0J
R304 100JR304 100J
R301 470JR301 470J
C322
0.1u
C322
0.1u
LTL-1LHG-002A
LED310
LTL-1LHG-002A
LED310
R323
10KJ
R323
10KJ
C306
1000p
C306
1000p
OPEN
LED303
OPEN
LED303
R331 100JR331 100J
TP10TP10
LTL-1LHG-002A
LED302
LTL-1LHG-002A
LED302
IC301
GPM181C0
IC301
GPM181C0
GND
10
V5
9
VDD
8
RS
7
R/W
6
E
5
DB4
4
DB5
3
DB6
2
DB7
1
R327
820J
R327
820J
C333 0.1uC333 0.1u
Q305
KRA225S
Q305
KRA225S
3
2
1
TP9TP9
LTL-1LHG-002A
LED307
LTL-1LHG-002A
LED307
Q303
KRA225S
3
2
1
R306
OPEN
R306
OPEN
TP13TP13
C331
100p
C331
100p
R330 100JR330 100J
Q304
KRA225S
3
2
1
TP11TP11
LTL-1LHEE-002A
LED304
LTL-1LHEE-002A
LED304
LTL-1LHG-002A
LED305
LTL-1LHG-002A
LED305
TP8TP8
TP4TP4
R334 100JR334 100J
R324
0J
R324
0J
C305
1000p
C305
1000p
C327
100p
C327
100p
R303 100JR303 100J
LTL-1LHG-002A
LED314
LTL-1LHG-002A
LED314
C308
Open
C308
Open
Q302
KRC106S
Q302
KRC106S
1
2
3
D304
ZENER_3.3V
D304
ZENER_3.3V
R329 100JR329 100J
C307
open
C307
open
R328
10kJ
R328
10kJ
C328
100p
C328
100p
TP12TP12
C338 0.1uC338 0.1u
TP7TP7
R326
0J
R326
0J
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
OPERATION PWB (LED/LCD section) (AL-2050CS) 1/3