Panasonic FA-A888 Service Manual ▷ View online
2-6
(2) Original reverse feeding
• This operation takes the original on the platen glass turns it over then places it
on the platen glass.
SV032
1) After 50msec, the transport belt motor begins to rotate normally. At this time,
the original reverse solenoid is turned ON, and the original is now in a position
where it can be reversed.
2) Simultaneously, JAM timer (3) starts its count to 1225msec.
3) The original reverse motor starts.
4) When the original arrives at the original exit/reverse sensor within 1225msec
of JAM timer (3), both the transport belt motor and the reverse motor stop and
the rotational pulse of the original reverse motor is started to count.
5) After 50msec, the transport belt motor begins to rotate in reverse. And after
40msec, the original reverse motor starts. At this time JAM timer (4) begins
its count to 1000 msec.
6) When the original has passed the original exit/reverse sensor within 1000msec
of JAM timer (4), the rotational pulse that is counted is switched from the
original reverse motor to the transport belt motor.
7) When the rotational pulse of the transport belt motor is increased to 2476,
both the transport belt motor and the original reverse motor stop.
2-7
Structure
(3) 2 in 1 Original exit operation
1) ~ 6)
7) ~ 8)
SV034
1) The original reverse motor and the transport motor begin to rotate normally.
At this time, when the original does not arrive at the original reverse/exit sensor
within 1395msec of JAM timer, the original stop pulse of the transport motor
begins its count to 732.
2) When the original arrives at the reverse/exit sensor within 1395msec, the the
deceleration pulse of the original reverse motor begins to count.
At this time JAM timer stopped at the reverse/exit sensor begins its count to
2600msec.
3) When the original stop pulse of the transport motor increases its count, the
transport motor stops.
4) When the deceleration pulse of the original reverse motor increases, the
reverse motor is switched from high gear to low gear.
5) When the reverse/exit sensor is turned OFF, the timer delayed the second
original exit starts its count to 60msec.
6) When the delayed timer increases, the transport motor begins to rotate
normally.
7) When the original has passed the original reverse/exit sensor, the transport
motor stops. Simultaneously the original reverse motor stop pulse starts its
count to 424.
8) When the original reverse motor stop pulse is increased to 424, the reverse
motor stops.
2-8
2.3 Original count system
(1) Original count
• This operation counts the originals. It consists of 2 operations, one is the original
feed count, and the other is the original exit count, and each operates
simultaneously.
SV029
1) When the wait solenoid is turned ON, the stopper and the weight are moved
downward and the originals on the original feed tray can move.
2) After 100msec, the reverse motor stops.
3) After 30msec, the transport belt motor begins to rotate normally.
4) After 170msec, the original feed motor begins to rotate normally and the original
is moved in the direction of the registration roller. (At this time JAM timer (1)
starts to count to 220msec.)
5) When the original arrives at the registration sensor within 2200msec of JAM
timer (1) and 100 pulse count is started, the original feed motor stops. The
original waits until it is pressed against the registration roller.
6) After the original feed motor stops and 50msec has elapsed, the original feed
motor begins to rotate in reverse, and the original is moved in the direction of
the platen glass. (At this time, the counts of JAM timer (2) to 840msec and
JAM timer (7) to 1595msec are started.)
7) When the original has passed the timing sensor within 840msec of JAM timer
(2), the original feed motor stops. (At this time, when an original is in the original
feed tray, and 50msec has elapsed, the original feed operation is repeated.)
8) When the original has passed the original exit/reverse sensor within 1080msec
of JAM timer (7), the count of the original reverse motor deceleration pulse is
started. (At this time, the count of JAM timer (5) starts to 1080msec.)
9) When the count of the original reverse motor deceleration pulse is increased,
the original reverse motor is switched from high to low speed.
10) When the original passes the original exit/reverse sensor within a
predetermined time of JAM timer (5), the transport belt motor stops and the
original reverse motor stop pulse starts to count to 307.
11) When the count of the original reverse motor stop pulse is increased to307,
the original reverse motor stops. (At this time, when all of the originals have
not yet exited, it will switch from low gear to high speed without stopping.)
3-1
Maintenance
Part name
Original feed roller
Original pick-up roller
DFP roller
Registration roller
Registration sensor
Timing sensor
Original reverse roller
Original exit roller
Original exit/
reverse sensor
Transport belt
PF2217P316A
PF2214P471A
PF2217K050A
PF2214P301A
PF2214K224A
PF2214K224A
PF2217P317A
PF2214P323B
PF2214K222A
PF2214P353A
Every
120,000
copies
Remarks
—
3. Maintenance
3.1 Maintenance chart
• In addition to the following maintenance table, the transport belt must be cleaned
as part of regular service calls.
• The timing of regular maintenance is determined on the basis of the number of
ADF original feed count.
Cleaning
Replacement
Maintenance interval
Every
40,000
copies
Brush, waste, air
blower, isopropyl
alcohol
NOTE: Minimum
quantity of
isopropyl
alcohol should
be used and be
wiped
immediately
after its use.
Every
120,000
copies
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