BenQ 2720S Service Guide - Page 34
Motor, Driver
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J11 5.7.2 MainBoard J1 J13 J4 ASP RAM ASIC CPU 78e516 ASIC MOTOR DRIVER Host J2 Figure 5-11 Main Board of Film Scanner Connector J1 on Scanner 2740S MainBoard J1 is connected to the line motor to drive the stepping motor. Pin # 1 2 3 4 Signal name LM1A LM1B LM2A LM2B Description Line motor pulse phase 1 of coil A Line motor pulse phase 1 of coil B Line motor pulse phase 2 of coil A Line motor pulse phase 2 of coil B 5-12 API Confidential No Copy/Reproduction allowed Electrical Systems
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5.7.2 MainBoard
ASP
ASIC
ASIC
CPU
78e516
J1
J2
J11
Host
J13
J4
RAM
MOTOR
DRIVER
Figure 5-11 Main Board of Film Scanner
Connector J1 on Scanner 2740S MainBoard
J1 is connected to the line motor to drive the stepping motor.
Pin #
Signal name
Description
1
LM1A
Line motor pulse phase 1 of coil A
2
LM1B
Line motor pulse phase 1 of coil B
3
LM2A
Line motor pulse phase 2 of coil A
4
LM2B
Line motor pulse phase 2 of coil B
5-12
API Confidential
Electrical Systems
No Copy/Reproduction allowed