Read Sharp UP-3300 (serv.man13) Service Manual online
2-2-2. General description
2-2-3. Signal description
No.
NAME
DESCRIPTION
1
+20V
—
2
+20V
—
3
/RESA
Inverted signal of RESA
4
RESA
Reset signal (Not battery back-uped)
5
SCK2A
Shift clock
6
/HTS2A
Data (Host to Sattellite)
7
/STH2A
Data (Sattellite to Host)
8
SHEN2
Shift enable
9
GND
—
10
GND
—
2-2-4. Display control
1) 7 segment
CKDC9 directly drives the 7-segment display.
The display tube employs a grid blanking dynamic drive and operates
in the following timing.
in the following timing.
<7-segment display>
2) Dot display
M66004FP receives command from CKDC9, and drives the dot dis-
play.
play.
The display tube is driver in the following timing.
2-2-5. Data test
Host
→
CKDC9 in the UP-P16DP PWB
1) Host
→
UP-P16DP (loopback test)
1
Set the data "A" in the shift register of the host ECR.
2
Send the data "A" to the UP-P16DP with shift clock added to the
HOST and read the data on the UP-P16DP.
HOST and read the data on the UP-P16DP.
3
Set the data "B" to the HOST.
RESA
/RESA
SCK2A
/HTS2A
/STH2A
SHEN2A
POS Side
UP-P16DP
RESA
/RESA
/RESA
SCK2A
/HTS2A
/HTS2A
/STH2A
SHEN2A
POS Main PWB
+20V
RESA(RESET)
SHEN2A
SCK2A
OKDC9
+5V
G1-G11
SA-SG, DP, AP
SA-SG, DP, AP
7SEG-display
-26V
-26V
Gn-
1
SA~SG
DP,AP
DP,AP
Gn
(n=
1
~
11
)
58µS
15~
24µS
24µS
976µS
976µS x 11
/CS
/DCS
SCK
/DSCK
SDATA
DS0
CKDC9
M66004FP
-26V
5V
DG0~DG15
D0~D34
DOT
DISPLAY
DISPLAY
DGn-
1
D0~D34
DGn
61µS
11~40µS
488µS
488µS x 16
<Dot display>
Host
Shift register
CKDC9
UP-P16DP
OUT
IN
OUT
IN
HTS2A
STH2A
SCK2A
HOST
A
UP-P16DP
Unpredicatable
HOST
UP-P16DP
A
B
A
HOST
UP-P16DP
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