Samsung SCX-1100 Service Manual page 95

CIRCUIT DESCRIPTION
3-9-2 UART COMMUNICATION DATA
1) UART transmission DATA(received by the Main side)
Types
key data
SCAN POSITION sensor
DOC. detector sensor
For initial use of initial OPE
UART communication
LCD interface of OPE
Self initial generation of OPE
Send data requested by the Main
(Note) 1. After this, keep waiting until there is response from the Main.
2. The case of longer time(longer than 10ms) elapsed longer than waiting time required for Interface is regarded as fail
3. After this code went out, then data requested it goes out.
• KEY MATRIX
(1_H)
(_1H) INK
(_2H) PAPER
(_3H) SET UP
(_4H) SCROLL NOLUM-UP
(_5H) SCROLL NOLUM-DOWN RESERVED
(_6H) CANCEL
(_7H) ENTER
(_8H) QUALITY
Repair Manual
3-36
Status DATA used port
ON 11H~ 88H PORT PC0~PORT PC7
OFF af H
ON a5 H PORT PB3
OFF a4 H
ON a1 H PORT PB-5
OFF a0 H
ee H
OK b0 H
ERR c0 H
OK df H
ERR d0 H
e2 H
e0 H
(2_H) (3_H) (4_H)
RESERVED RESERVED RESERVED
RESERVED RESERVED RESERVED
RESERVED RESERVED RESERVED
RESERVED RESERVED RESERVED
RESERVED RESERVED
RESERVED RESERVED RESERVED
RESERVED RESERVED RESERVED
RESERVED RESERVED RESERVED
<SCX-1100 OPE B'D KEY MATRIX>
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Level Remarks
L
H
H SCX-1100 not applied
L
L SCX-1100 not applied
H
After power on, generated only once
(Note 2)
When failed in the interface once &
when succeeded first(Note 2)
LCD data keeps status quo
Data types:LCD, other(Note 3)
(5_H) (6_H) (7_H)
CONTRAST RESERVED RESERVED
COPY PAGE RESERVED RESERVED
ZOME RETE RESERVED RESERVED
BLACK COPY RESERVED RESERVED
COLOR COPY RESERVED RESERVED
SPECIAL RESERVED RESERVED
SCAN TO RESERVED RESERVED
POWER RESERVED RESERVED
(8_H)
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
Samsung Electronics