Sharp UX-B20 - Problems and Solutions

UX-B20U/UX-B20C/B25C
6 – 18
[4] Operation Panel PWB circuit
1. Operation Panel PWB circuit
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
SEN0
LD0
SEN1
LD1
SEN2 SEN3 SEN4 SEN5 SEN6
LD2 LD3 RS R/W E VO DG
E DG ORGSNS-
FRSNS-
KEN1A KEN2A KEN3A KEN4A
+3.3V
DG
+3.3V
+3.3V
16
FRSNS-
14
6
13
KEN1A
3
SEN3
8 9
SEN5
DG
15
4 7
+3.3V
10
1
SEN6 ORGSNS- KEN2A SEN1 KEN3A KEN4A E SEN0
CNPN
2
A2001WR2-16PE
(JWT)
SEN2
11
SEN4
12
5
CNPN-5 CNPN-6 CNPN-7 CNPN-8 CNPN-9
N.C N.C
11 10 12
VO
14
3
LD2 LD1 LD0
13
N.C LD3
RS
8
N.C
7 4
DG
6 1 2
E
9
R/W +3.3V
5
CNLCD
CNLCD-11 CNLCD-12 CNLCD-13 CNLCD-14 CNLCD-4 CNLCD-5 CNLCD-6 CNLCD-3 CNLCD-2
CNLCD-1
A
SPEED/DIAL
D6
1N4148
AK
START
SW2
FLASH/
INTERCOM
D4
1N4148
AK
R4
STOP
R2
SW1
HOLD
R3
N.M.
R1
+
C1
22u/50V
PLAY
1
SPEAKER
2
REC/MEMO
3 FUNCTION
D5
1N4148
AK
4
RESOLUTION
5
D2
1N4148
AK
6
7
INKRESET
C2 220p
D7
1N4148
AK
89
*
COPY/HELP
D3
1N4148
AK
0
#
UP
R5 6.2k
Z
D1
1N4148
AK
R6 200
DOWN
CNPN-10 CNPN-11 CNPN-12 CNPN-13 CNPN-14 CNPN-15 CNPN-16
CNPN-4 CNPN-3 CNPN-2 CNPN-1
Operation Panel PWB Circuit
Note: Since the parts of PWB cannot be supplied, change it as a unit.