Panasonic KX-FC965RU Service Manual ▷ View online
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KX-FC965RU-T
6.4.4.
Scanning Block
The scanning block of this device consists of a control circuit and a contact image sensor made up of a celfoc lens array, a light
source, and photoelectric conversion elements.
source, and photoelectric conversion elements.
When an original document is inserted and the start button pressed, pin 34 of IC10 goes to a high level and the transistor Q21 turns
on.This applies voltage to the light source to light it. The contact image sensor is driven by each of the FTG-F1 signals output from
IC10, and the original image illuminated by the light source undergoes photoelectric conversion to output an analogue image signal
(SIG). The analogue image signal is input to the system ASIC on AIN1 (pin 3 of IC10) and converted into 8-bit data by the A/D con-
verter inside IC10. Then this signal undergoes digital processing in order to obtain a high-quality image.
on.This applies voltage to the light source to light it. The contact image sensor is driven by each of the FTG-F1 signals output from
IC10, and the original image illuminated by the light source undergoes photoelectric conversion to output an analogue image signal
(SIG). The analogue image signal is input to the system ASIC on AIN1 (pin 3 of IC10) and converted into 8-bit data by the A/D con-
verter inside IC10. Then this signal undergoes digital processing in order to obtain a high-quality image.
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KX-FC965RU-T
6.4.5.
Stepping Motor Drive Circuit
1. Function
One individual stepping motor is used for transmission and reception. It feeds the document or recording paper synchronized
for reading or printing.
for reading or printing.
2. Circuit Operation
During motor driving, pin 124 of ASIC IC10 becomes a high level, and Q403, Q402 turns ON. As a result, +24V is supplied to
the motor coil.
Stepping pulses are output from ASIC IC10 pins, 120~123, causing driver IC401 pins, 11~14 to drive the Motor Coil. The
motor coil is energized sequentially in 2 phase increments, which causes a 1-step rotation. A 1-step rotation feeds 0.13 mm of
recording paper.
The timing chart is below.
the motor coil.
Stepping pulses are output from ASIC IC10 pins, 120~123, causing driver IC401 pins, 11~14 to drive the Motor Coil. The
motor coil is energized sequentially in 2 phase increments, which causes a 1-step rotation. A 1-step rotation feeds 0.13 mm of
recording paper.
The timing chart is below.
Stepping Motor Drive Mode
Function
Mode
Phase Pattern
Speed
Copy
Fine, Photo
1-2
432 pps (t=1/432)
Super Fine
1-2
216 pps (t=1/216)
FAX Sending
Standard
2-2
432 pps (t=1/432)
Fine, Photo
1-2
432 pps (t=1/432)
Super Fine
1-2
216 pps (t=1/216)
FAX Receiving
Standard, Fine, Photo
1-2
432 pps (t=1/432)
Super Fine
1-2
216 pps (t=1/216)
Paper Feed
———
1-2
432 pps (t=1/432)
Stand-by
———
All phases are currently off.
None
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KX-FC965RU-T
When the motor suspends while it is in the receive mode (about 70~80 msec), pin 124 of ASIC IC10 becomes a low level and
Q403 turns OFF. Then Q402 also turns OFF, and instead of +24 V, +6 V is supplied through D401 so that the motor is held in
place. When the system is in the stand-by mode, all of the motor drive transistors turn OFF. Consequently, the motor current
stops.
Q403 turns OFF. Then Q402 also turns OFF, and instead of +24 V, +6 V is supplied through D401 so that the motor is held in
place. When the system is in the stand-by mode, all of the motor drive transistors turn OFF. Consequently, the motor current
stops.
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KX-FC965RU-T
6.4.6.
Gear Section
This section shows how the motor-driven gear mechanism works in the main operations: FAX transmission, FAX reception the
motor and copying.
motor and copying.
6.4.6.1.
Mode Selection
When the motor attached to the Drive Motor Gear rotates counterclockwise (CCW), Swing Gear A engages the CAM and the CAM
turns counterclockwise to select a mode. (See Fig. A.) There are three mode options controlled by the Switch: A: Transmit mode,
B: Receive mode and C: Copy mode. In Fig. B, you can see which mode is selected by the position of the rib in the CAM.
turns counterclockwise to select a mode. (See Fig. A.) There are three mode options controlled by the Switch: A: Transmit mode,
B: Receive mode and C: Copy mode. In Fig. B, you can see which mode is selected by the position of the rib in the CAM.
<Fig. A>
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