Panasonic FA-A888 Service Manual ▷ View online
2-2
(2) One-sided original feed
• This operation feeds the original from the original feed tray onto the platen glass.
(During this operation, if an original is already on the platen glass, that original
will exit.)
1) When an original is not on the original timing feed position, original timing
feed operation begins.
2) After 50msec, the transport belt motor begins to rotate normally. (At this time,
JAM timer (3) starts its count to 1225msec.)
3) After 105msec, the original feed motor reverse rotation commences. (At this
time, JAM timer (2) starts its count to 840msec.)
4) When the original arrives at the original exit/reverse sensor within 1225msec
for JAM timer(3), the count is started for JAM timer (5) to 1080msec and the
original reverse motor deceleration pulse.
5) When the count of the original reverse motor deceleration pulse is increased,
the original reverse motor switches from high gear to low gear.
6) When the original passes the original exit/reverse sensor within 1080msec for
JAM timer(5), the original exit motor stop pulse starts its count to 30.
7) When the original reverse motor stop pulse count increases, the original reverse
motor stops.
8) When the original passes the registration sensor within 840msec for JAM
timer(2), the original feed stop pulse of the transport belt motor starts the
count to 187.
9) At the same time, the original feed motor stops.
10) When the rotational pulse of the transport belt motor increases to a
predetermined pulse count, the transport belt motor stops.
11) After 50msec, the transport belt motor reverse rotation begins at a low speed.
12) When the rotational pulse of the transport belt motor increases to 63 pulse
count, the transport belt motor stops. (Only in switch back)
SV029
2-3
Structure
(3) Two-sided original feed
• This operation turns over the original at the reverse section then feeds it to the
platen glass. (During this operation, if an original is already on the platen glass,
that original will exit.)
SV030
1) When the original is not in the original timing feed position, the original timing
feed operation begins.
2) After 50msec, the original reverse and exit motor begins to rotate
simultaneously. (At this time, JAM timer (3) starts it count to 1225msec.)
3) After 100msec of the original feed motor reverse start timer, the original feed
motor reverse rotation begins. (At this time, JAM timer starts its count to
840msec, and JAM timer starts it count to 1585msec.)
4) When an original is on the platen glass, JAM timer(6) within 1585msec, and
the original timing feed position original JAM timer(3) within 1225msec have
arrived at the original exit/reverse sensor, and have passed the registration
sensor within 840msec of JAM timer(2), the original on the platen glass is
exited, and the original timing feed position original is reversed.
2-4
(4) 2 in 1 feed
• This operation feeds two originals in one pair from the original feed tray onto the
platen glass.
(During this operation, if an original is already on the platen glass, that original
will exit.)
SV033
1) When the original is not on the original timing feed position, the original timing
feed operation begins.
2) After the original timing feed operation, the transport motor begins to rotate
normally.
3) After 105msec, the original feed motor reverse rotation commences.
(At this time, JAM timer stopped by the timing sensor starts its count to
955msec.)
4) When the original passes the timing sensor within 955msec, the original feed
stop pulse of the transport belt motor starts its count to 103. And at the same
time the original feed motor stops.
5) When the rotational pulse of the transport motor increases to a predetermined
pulse count, the transport motor stops. (If an odd number, the original is not
flipped over.)
6) The original timing feed operation begins. (In an even number, the original is
fed.)
7) When the original of an even number arrives at the registration sensor, and
the count increases to 100, the original feed motor stops.
8) The original feed motor reverse rotation begins. <Start of 2 in 1 original feed >
9) After timing sensor is turned ON, the transport motor begins to rotate normally
by 7 pulses.
10) When the transport motor begins to rotate normally by, two originals in one
pair are transported to the platen glass.
11) When the original passes the timing sensor, pulse count to stop original feed by the
transport belt motor starts to 135. At the same time the original feed motor stops.
12) The rotational pulse of the transport motor reaches pre-fixed number, the
transport motor stops. (Completion of original set on the glass surface)
1) ~ 6)
7) ~ 12)
2-5
Structure
2.2 Original paper exit system
(1) Original Exiting
• This operation exits the originals. When a page with the lower page number of
original is not facing downward, the original will be turned over before being
exited. (The originals are always exited so that the page with lower page number
is on top.)
SV031
1) Only when the original is in the original timing feed position, one-sided original
feeding is done. The original on the platen glass is exited, and the original on
the timing feed position is moved to the platen glass. (When exiting both, the
original on the platen glass and the original on the timing feed position is
done, only when it is necessary is a reversal done.)
2) After completion of the transfer in 1) above, the reverse transport belt motor
begins to rotate normally. (At this time, JAM timer (3) starts its count to
1225msec.)
3) When the original arrives at the original exit/reverse sensor within 1225msec
of JAM timer (3), the original reverse motor begins the deceleration pulse
count. (At this time, JAM timer (5) starts its count to 1080msec.)
4) When the count of the original reverse motor deceleration pulse increases,
the original reverse motor switches from high gear to low gear.
5) When the original passes the original exit/reverse sensor within 1080msec of
JAM timer (5), the transport motor stops. Simultaneously, the original reverse
motor stop pulse begins its count to 307.
6) When the original reverse motor stop pulse increases to 307, the original
reverse motor stops.
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