Ricoh A028 Service Training Manual page 170

Electrical Control
2.15.4 Paper feed control board
NOTE
LED and DGS are for system
checks.
TP (test poins) table
No.
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
Clock pulse for shield screen motor reverse rotation
Clock pulse for shield screen motor forward rotation
Clock pulse for jogger motor
Clock pulse for mirror/lens motor
Clock pulse for back fence motor
Clock pulse for duplex paper feed motor
Clock pulse for LCT motor
Not used
Clock pulse for 1st paper feed motor
Clock pulse for 2nd tray motor
Clock pulse for 2nd paper feed motor
Clock pulse for 3rd tray motor
Clock pulse for 3rd paper feed motor
-
Clock pulse for registration motor
+12V
+5V
GND
TXD
RXD
Description
2-134
1 July 1994