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KX-F910BX
(RECEPTION)
TRANSMISSION
MOTOR
TM0
(RMO)
TM1
(RM1)
TM2
(RM2)
TM3
(RM3)
73
(67)
74
(68)
75
(69)
76
(70)
13
(13)
4
3
2
1
5
12
(12)
11
(11)
10
(10)
4
(4)
TXE
(RXE)
77
(71)
R44
(R46)
R43
(R45)
5
(5)
6
(6)
7
(7)
+24V
+5V
Q1
(Q3)
D1
(D2)
Q2
(Q4)
IC7(IC8)
GATE ARRAY
(IC1)
9
(D4)
D3
CN9
(CN10)
4-4. STEPPING MOTOR DRIVE CIRCUIT
(1) Function
Two individual stepping motors are used for transmission and reception. They feed document or recording paper
synchronized for reading or printing.
(2) Circuit Operation
During motor drive, gate array IC1 pin 77/pin 71 becomes high level, Q2/Q4 are turned ON, and Q1/Q3 go ON as a result,
+24 V is supplied to the motor coil.
Stepping pulses are output form gate array IC1, causing driver IC7/IC8 to go ON. The motor coil is energized sequentially in
2 phase increments, which causes a 1-step rotation. Rotation of 1-step 0.13mm of recording paper or document paper.
Timing chart is below.
Timing Chart
Copy
FAX
Function
Mode
Drive Phase
Pattern
Speed
STD
Fine/Half Tone
Super Fine
STD
Fine/Half Tone
Super Fine
Paper Feed
1-2
1-2
1-2
1-2
1-2
1-2
1-2
434 pps
434 pps
217 pps
434 pps
434 pps
217 pps
217 pps
Stepping Motor Phase Pattern
1-2. Phase (Asic TM0-TM3, RM0-RM3 output)
Circuit Diagram
TM0 (RM0)
TM1 (RM1)
TM2 (RM2)
TM3 (RM3)
Phase 0
Phase 1
Phase 2
Phase 3
max.
1
/
4
3
4
(sec)
When the motor is OFF, gate array IC1 pin 77/pin 71 becomes low level and Q2/Q4 are turn OFF. This causes Q1/Q3 to
also go OFF and inserted of +24V, +5V is supplied through D1/D2 so that the motor is held in place.
Содержание KX-F910BX
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