Mar. 1998 © TOSHIBA
13 - 21
1550/1560 OPTIONAL
13.6.2
Driving of the drive motor
The drive motor M10 (PFU-MOT) is driven by transistor Q1 as described below:
When the signal MOT-ON2*
1
from the copier becomes "L", an "L" voltage is applied to the base of Q1, Q1
is turned on, causing current to flow from +24V
f
Q1's emitter
f
Q1's collector
f
R3
f
DG. This will cause
the drive motor
M10
(PFU-MOT) to rotate. When the MOT-ON2 signal becomes "H", Q1 is turned off,
shutting off the above current route. But while the motor continues to rotate due to its inertia, current also
tries to continue to flow, causing a voltage to be generated between the input and output terminals of the
motor. Since this voltage is applied between the anode and cathode of D1, the inverse electromotive
voltage occurring in the motor is short-circuited and restricted.
*1: The MOT-ON2 signal is to cause the motor (PFU-MOT) M10 to rotate and is supplied by the copier.
When this signal becomes "L", the motor starts rotating.
M10
+24V
R1
R2
IC1
MOT-ON2
“H”
Q1
R3
D1
DG
Current route while the motor is turned on
Current route while the motor is turned off
M10
+24V
R1
R2
IC1
MOT-ON2
“L”
Q1
R3
D1
DG
Summary of Contents for 1550
Page 11: ...1550 1560 GENERAL 2 4 Mar 1998 TOSHIBA ...
Page 112: ...1550 1560 DRUM 9 12 Mar 1998 TOSHIBA 1 16 48 CLK SI1 LT OUT1 1 2 64 Timing chart ...
Page 167: ...Mar 1998 TOSHIBA 13 25 1550 1560 OPTIONAL 13 7 4 PC board assembly PWA F PFU ...
Page 188: ...Mar 1998 TOSHIBA 14 21 1550 1560 CIRCUIT DIAGRAMS Control Panel Circuit PWA F PNL 4 4 ...
Page 189: ...1550 1560 CIRCUIT DIAGRAMS 14 22 Mar 1998 TOSHIBA 14 4 Fuser Circuit PWA F FUS ...
