FORMA: Service & Maintenance manual - rev. 3.0
Page 6.33
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
(1) Place the tester probes between pins 5 (signal) and 12 (ground) of connector K4 on the CPU
board. Press the “↑” key: the measured value should be 4.65 Vdc. Place the tester probes
between pins 3 (signal) and 12 (ground) of connector K4 on the CPU board. Press the “↓”
key: the measured value should be approximately 4.65 Vdc.
(2) Place the tester probes between pins 2 (signal) and 12 (ground) of portable connector CN28.
Press the “↑” key: the measured value should be approximately 4.65 Vdc. Place the tester
probes between pins 1 (signal) and 12 (ground) of portable connector CN28. Press the “↓”
key: the measured value should be approximately 4.65 Vdc.
(3) Place the tester probes between pins 5 (signal) and 12 (ground) of connector J6 on the driver
board. Press the “↑” key: the measured voltage should be 4.65 Vdc. Place the tester probes
between pins 3 (signal) and 12 (ground) of connector J6 on the driver board. Press the “↓”
key: the measured value should be approximately 4.65 Vdc.
(4) Check that there are no visible scorch marks, and that the travel of the moving parts is not
obstructed.
To Next Page
Loading...
