Toshiba 1550, Руководство по обслуживанию

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Mar. 1998 © TOSHIBA 6 - 11 1550/1560 DRIVE
6.4.2 Control signal
(1) MAIN-CW/CCW (LGC
→
MTR: Input)
This is a signal to change the direction of rotation of the main motor. When the CW/CCW signal is at
“L” level, the main motor rotates counterclockwise when viewed from the rear, and drives the devel-
oper, drum and heat roller in the designated direction.
(2) PLL-OK signal (MTR
→
LGC: Output)
When the FG pulse cycle difference against the reference frequency is within the range of +4.6%
and –5.3%, it is defined as the lock range (normal state), and the signal becomes “L” and LED
“ED1” comes ON.
(3) MTR-BRK signal (LGC
→
MTR: Input)
This is the signal to control the speed of the main motor. The brake is applied to the main motor
when the signal becomes “L” level.
(4) MAINMTR-ON signal (LGC
→
MTR: Input)
This is a signal to turn ON/OFF the main motor. The main motor turns when this signal becomes “H”
level.
(5) MOT-FG signal
This signal generates FG signals while the motor is rotating.
Signal level of motor circuit.
Signal name “H” level “L” level
MAIN-CW/CCW CW direction CCW direction
PLL-OK Control deficiency Normal
MOT-FG Rotation pulse signal
MTR-BRK Brake OFF Brake ON
MAINMTR-ON Motor ON Motro OFF
The signals are respectively the level on the input/output pins of
IC1 and 3.