M16 (Web Drive) Control - Minolta Di551 Service Manual

[3] M16 (Web Drive) Control

24VDC
PGND
5VDC
SGND
DCPS
SD2 (web) is controlled by PRCB (printer control
board). The related signal is PS30 (fixing exit).
1. Operation
When PS30 is turned ON by passage of paper,
SD2 is controlled by PRCB (printer control
board) according to the fixing web counter value.
The fixing web counter value is incremented
together with the total counter in exit section of
the main body. The relationship between the fix-
ing web counter values and SD2 (web) is as fol-
lows:
Fixing web counter
value
1 to 12,000
12,001 to 30,000
30,001 to 60,000
60,001 to 125,000
125,0001 to 260,000
260,001 or more
*1 SD2 is turned ON once per copy, but is not turned
ON once per six copies.
*2 SD2 is turned ON once per copy, but is not turned
ON once per three copies.
5V2
FIXEXIT_PS PS30
S.GND
MC24V_2
SD2
WEBSC_DRV
PRCB
SD2 drive count
Once per copy
Once per copy *1
Once per copy *2
Once per 2 copies
Once per 3 copies
Once per 6 copies
2-O-3
2. Signals
a. PRCB input signal
(1) FIXEXIT_PS (PS30 to PRCB)
Detection signal of passage of paper at fixing unit
exit
[L]: Detected.
[H]: Not detected.
b. PRCB output signal
(1) WEBSC_DRV (PRCB to SD2)
SD2 (web) drive control signal
[L]: SD2 ON
[H]: SD2 OFF
FIXING UNIT