Adj 16 Adjusting The Touch Panel Coordinates; Adj 17 Adjusting The Supply Voltage - Sharp AR-M550N Service Manual

ADJ 16 Adjusting the touch panel
coordinates
This adjustment is needed in the following situations:
• The operation panel has been replaced.
• U2 trouble has occurred.
• The MFP control PWB has been replaced.
• The EEPROM on the MFP control PWB has been replaced.
1) Go through the modes specified in Simulation 65-1.
SIMULATION 65-1
2) Press the four cross mark points.
Pressing the cross mark points correctly results in gray display. When
the touch panel adjustment is complete with the four points pressed,
the sub-number entry screen for simulation reappears.
If any error is detected, the touch panel returns to adjustment mode.
Note: Never use something with a sharp tip (such as a needle or pin)
to press the touch panel.
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 volt-
age is 24 V.
RV202
GND +24V
(CN3, 4pin) (CN3, 1pin)
AR-M550/M620/M700 SETTING AND ADJUSTMENTS 7 - 43
(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.
RV201
(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.
GND +12V
(CN4, 6pin) (CN4, 1pin)
GND +38V
(CN8, 4pin) (CN8, 1pin)
RV102