Ricoh bk5010 - 4.4 TEST POINTS

4-41
Trouble-
shooting
19 April 2006
TEST POINTS
+UNREG
GND/
PGND
VCC
+UNREG: Outgoing unregulated 36V, after interlock relay. Measure between Test
Point +UNREG and Test Point GND/PGND using a voltmeter. The voltage will be
shown on the voltmeter unless:
- Voltage is outside allowed range 29-43V. Voltage will be 0V.
- Machine is interlocked (i.e. the top cover is open). Voltage will be 0V.
VCC: Stabilised and rectied 5V made from incoming 10V AC from transformer.
- Measure between Test Point VCC and Test Point GND/PGND using a voltmeter.
The voltage will be shown on the voltmeter. Range 4.9-5.1V.
GND / PGND: Ground /Power Ground is the minus when measuring either unregu-
lated 36V (+UNREG) or 5V (VCC).
Motor Drive PCB (MD6DC) in Booklet Maker & Trimmer
4.4 TEST POINTS