Adjusting The Supply Voltage - Sharp MX-M550U Service Manual

ADJ 17

Adjusting the supply voltage

This adjustment is needed in the following situations:
* One or more parts of the DC main power supply unit have been
replaced.
* One or more parts of the DC sub power supply unit have been
replaced.
(24 V supply voltage adjustment)
1) Apply a digital multi-meter to the DC main PWB 24 V line
(CN3, 1 pin) and GND (CN3, 4 pin).
2) Turn RV202 on the DC main power supply PWB so that the
voltage is 24 V.
RV202
(38 V supply voltage adjustment)
3) Apply a digital multi-meter to the DC main PWB 38 V line
(CN8, 1 pin) and GND (CN8, 4 pin).
4) Turn RV201 on the DC main power supply PWB so that the
voltage is 38 V.
RV201
GND +24V
(CN3, 4pin) (CN3, 1pin)
GND +38V
(CN8, 4pin) (CN8, 1pin)
MX-M700N ADJUSTMENTS 6 – 43
(12 V supply voltage adjustment)
5) Apply a digital multi-meter to the DC sub PWB 12 V line (CN4,
1 pin) and GND (CN4, 6 pin).
6) Turn RV102 on the DC sub power supply PWB so that the volt-
age is 12 V.
GND +12V
(CN4, 6pin) (CN4, 1pin)
RV102