Sharp UX-B700 - Improving Print Quality

UX-B700U
FO-B1600U
A A
B B
C C
D D
E E
D D C C B B A A
+3.3V
DG DG
+3.3V
DG
SEN0 SEN2 SEN1
LD2 LD1 LD0
E +3.3V
DG
+3.3V
R/W E VO
SEN4
RS
LD3
SEN3
KEN4A KEN2A KEN3A KEN1A
DG
12 11 10
E VO DG
7 6 5 2 1
14 13
3 4 8 9
12 11 10
KEN1A DG KEN3A KEN2A KEN4A
7 6 5 2 1
CNPN
E
3 4 8 9
CNPN-8
CNPN-10
CNPN-9
CNLCD-11 CNLCD-12 CNLCD-13
CNPN-7 CNPN-6 CNPN-5
CNLCD-3 CNLCD-1 CNLCD-5 CNLCD-6 CNLCD-2
CNPN-12
CNLCD-4 CNLCD-14
CNPN-11
CNPN-2 CNPN-3 CNPN-1 CNPN-4
DOWN
08
R2 200
+
C3 22u/50V
REC/MEMO
D3 1SS133
PLAY 18/G28/TUV
STOP
SPEED/DIAL
R5 100k
A0 A1 A2 A3 NC
D1 D2 D3 D4 D5 D6 D7 D8 D9
VCC
GND
074/GHI
7/PQRS
SPEAKER
R6 100k
5/JKL
A
RESOLUTION
INTERCOM
R11 100k
R4 100k
C2 22000p
R9 100k
*
D1 1SS133
17/G1
2/ABC
R10 100k
1
UP
FUNCTION
R8 100k
14
R7 100k
0
12
15
R3 100k
11
16/POLL
6/MNO
13
HOLD
9/WXYZ
COPY/HELP
10
#
Z
04
START/MEMORY
C1
N.M
3/DEF 0601
09
D5 1SS133
0302
D4 1SS133 D2 1SS133
05
R1 6.2k
74HC147
IC1
N.M.
+3.3V SEN0 SEN1 SEN2 SEN3 SEN4
LD3 LD2 LD1 LD0 N.C N.C N.C N.C R/W RS +3.3V
CNLCD
6 – 22
[5] Operation Panel PWB circuit 1/1
Note: Since the parts of PWB cannot be
supplied, change it as a unit.