Service manual

ER-A242U CIRCUIT DIAGRAM AND PWB LAYOUT
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S
G
D
MOTOR
JUMPER WIRE
MAX 9A
DRAWER1
DRAWER2
STRAIGHT CON RIGHT-ANGLE CON
RIGHT-ANGLE CON
JUMPER WIRE
FB5,FB6,FB7:JUMPER WIRE
D
G
S
JP1
jumper
NOT INSTALL
JUMPER WIRE
JUMPER WIRE
JUMPER WIRE
JUMPER WIRE
NOT INSTALL
NOT INSTALL
VH
A /A B /B
VDR
P91
/S6 P91
a b c VDR d e f g dp
/S0 /S1 /S2 /S7 /S8 /RESET P90 P91 P92 P93 P94 P95 P96 P97 /S9 /VON /S3 /S4 /S5 /S6
P100
P90 P91 P92 P93 P94 P95 P96 P97
P101
/RESET /S3 /S4 /S6 c d e f g dp /S9 /S5 a b
P91
TH
P91
HUPS
P91
/VON /S0 /S1 /S2 /S7 /S8
/S7
A B /LAT
CLK TH /B /A
/STB1 /STB2
HUPS
DAT
PE
PE
DR1 /S6
MOTOR
/S6 /S5 /S4 /S3 /S2 /S1 /S0 /S8 /S9
KST0 KST1 KST2 KST3
DR2
VDR
/S4 /S3
/VPON
A /A B /B
ENA1 ENA2 IN1 IN2
VP
VCC
VCC
VH
VH
VLED
VCC
VH
VO
VCC
VCC
VCC
VP
VCC
VCC
CN4A
ONLY HOLE
1 2 3 4 5 6 7 8 9
10 11 12
D12
1SS133
IC16 74HC138
1 2 3 4 5 6 7 89
10 11 12 13 14 15 16
A B C G2A G2B G1 Y7 GND Y6
Y5 Y4 Y3 Y2 Y1 Y0
VCC
R93 10KF
D1A 1N4002
C71
0.1uF
IC13 LB1838M
1 2
13
6 9 7
14
4 11 3 5 12 10 8
VCC ENA1 ENA2 IN1 IN2 GND GND
VS1 VS2
OUT1 OUT2 OUT3 OUT4
VCONT
FB4
C66673
R96
30KF
CN8
5046-03A
1 2 3
C82
0.1uF
F6
T500mA/250V
R98
2K
FB5
C66673
CN7
5046-03A
1 2 3
R99 10K
FB6
C66673
FB7
C66673
C79
0.1uF
IC17 74HC138
1 2 3 4 5 6 7 89
10 11 12 13 14 15 16
A B C G2A G2B G1 Y7 GND Y6
Y5 Y4 Y3 Y2 Y1 Y0
VCC
C83
0.1uF
C97
0.1uF
R95 10K
+
C75 47uF 50V
Q9 2SD2212
CN3
34FE-BT-VK-N
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
C96
0.1uF
R100 4.7K
Q6
MTD2955V
R102
1K
Q11
2SD2212
R97
10K
C76
0.1uF
C73 330pF
C77
0.1uF
Q8
KRC111S
R105
1K
C72 0.1uF
C81
0.1uF
R94
10KF
CN 4B
ONLY HOLE
1 2 3 4 5 6 7 8 9
10 11 12
+
C78 10uF/50V
C74
0.1uF
D13
1SS133
CN5
B2B-EH-A
1 2
Q13 2SD2212
R101
1K
R103 22K
FB2
C66673
R104 4.7K
+
C98 10uF/16V
CN6
5045-03A
1 2 3
FB3
C66673
D14
1SS133
Q10KRC111S
Q7
2SK2731
C80
0.1uF
A B
C D
87654
3
21
12345678
D C
B A A
B
C D
87654
3
21
12345678
D C
B A A
B
C D
87654
3
21
12345678
D C
B A A
B
C D
87654
3
21
12345678
D C
B A
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