AR-M550 (serv.man14). (7) Settings and adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 44

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AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 44
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 volt-
age is 24 V.
(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 volt-
age is 38 V.
(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 voltage
is 12 V.
ADJ 17
Adjusting the supply voltage
RV202
(CN3, 4pin) (CN3, 1pin)
GND
+24V
RV201
(CN8, 4pin) (CN8, 1pin)
GND
+38V
RV102
(CN4, 6pin) (CN4, 1pin)
GND
+12V
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