Sharp UP-3300 (serv.man13) Service Manual ▷ View 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
– 3 –
4
Send the data "B" to the UP-P16DP with shift clock’s added by the
HOST. Then, sen the previous data "A" in the UP-P16DP to the
HOST.
HOST. Then, sen the previous data "A" in the UP-P16DP to the
HOST.
The host cash register transfers data to UP-P16DP after eigth
shift clocks. In this event, the contents of the UP-P16DP shift
register (data A) is not destroyed.
shift clocks. In this event, the contents of the UP-P16DP shift
register (data A) is not destroyed.
5
The HOST checks if the returned data "A" are properly trans-
mitted. The data "B" returns to the HOST to be checked after a
next data or a dummy data are sent.
mitted. The data "B" returns to the HOST to be checked after a
next data or a dummy data are sent.
2) CKDC9
→
host (repeated transmission of the same
data twice)
1
Set the data "A" in the CKDC9 side shift register.
2
Sent the data "A" on the shift clock and read it on the host side.
3
Set the dame data "A" in the CKDC9 side shift register.
4
Again, sent the data "A" on the shift clock.
5
On the host side, compare the data "A" read in
2
to check if the
transmission was achieved properly.
2-2-6. UP-P16DP operation check
The /SHEN2A signal is used to check lock up of the UP-P16DP.
Normally, it will complete within 2msec before /SHEN2A is set after
the HOST completed data transmission. If /SHEN2A was not
received within the predetermined time, it will be error processed as
an error.
Normally, it will complete within 2msec before /SHEN2A is set after
the HOST completed data transmission. If /SHEN2A was not
received within the predetermined time, it will be error processed as
an error.
B
A
B
A
HOST
UP-P16DP
A
Unpredicatable
HOST
CKDC9
A
HOST
CKDC9
A
HOST
CKDC9
A
HOST
CKDC9
/SHEN2A
/SCK2A
30µ s ~ 2mms
– 4 –
1/2
3.
Cir
cui
t d
iag
ra
m
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 5 –
2/2
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 6 –
Click on the first or last page to see other UP-3300 (serv.man13) service manuals if exist.