TRAY 1/2 PAPER FEED UNIT (7255/7272)
2-J-12
2 UNIT EXPLANATION
[4] Horizontal Conveyance Control (Tray 1)
The horizontal conveyance from Tray 1 is con-
ducted by transmitting the drive force of M1
(paper feed) to the horizontal conveyance roller
/L and horizontal conveyance roller /R via MC15
(horizontal conveyance MC/L) and MC16 (hori-
zontal conveyance MC/R).
The above operations are controlled by PRCB
(printer control board). Related signals are PS1
(feed /1), PS5 (horizontal conveyance /L) and
PS6 (horizontal conveyance /R).
1. Operation
a. Operation of MC15 (horizontal conveyance
MC/L)
(1) ON timing for the first paper
When the restart of MC3 (feed MC/1) is turned
ON.
(2) ON timing for the second paper
After a specified time when MC1 (registration
MC) is turned ON.
(3) OFF timing
After a specified time when PS44 (registration) is
turned ON.
b. Operation of MC16 (horizontal conveyance
MC/R)
(1) ON timing for the first paper
After a specified time when PS6 (horizontal con-
veyance /R) is turned ON.
(2) ON timing for the second paper
After a specified time when MC1 (registration
MC) is turned ON.
(3) OFF timing
After a specified time when PS6 (horizontal con-
veyance /R) is turned ON.
7272ma2008
ADUDB
PRCB
IO DTXD
IO DCLK
ADU LATCH
IO UCLK
REQ1
IO URXD
ACK1
ERR OUT1
2NDM CLK
REG PS
PS44
5V2
2ND PS
S.GND
MC1
MC24V
2ND MC
DCPS
24V1
5V2
S.GND
P.GND
-5V1
5V2
24V1
S.GND
5V3
HFPS_L
S.GND
FEEDM_CONT
FEEDM_CLK
FEEDM_F/E
FEEDM_EM
5V
P.GND
24V3
HFMC_L
24V3
HFMC_R
M1
P.GND
24V2
PS5
5V3
HFPS_R
S.GND
PS6
MC15
MC16
MS1
MS2
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
2-J-12 ADDITION
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