AR-C270 (serv.man12). (Section 7) Settings Adjustments M21-M25 - Sharp Copying Equipment Service Manual (repair manual). Page 2

Read Sharp AR-C270 (serv.man12) Service Manual online

(AR-C250/C160/C270)
Repeat procedures 2) –  9) until the condition of procedure 8) is satis-
fied.
ADJ M23
Power voltage adjustment
(AR-C100/C150/C250/C270)
This adjustment must be performed in the following cases:
When a part in the DC power unit is replaced. 
ADJ 1
3.4V power voltage adjustment
1) Put the multi-meter on the 3.4V line of the DC main PWB and
GND.
2) Turn VR704 on the DC main PWB to adjust so that the voltage is
3.4V.
ADJ 2
5.0V power voltage adjustment
1) Put the multi-meter on the 5.0V line of the DC main PWB and
GND.
2) Turn VR703 on the DC main PWB to adjust so that the voltage is
5.0V.
ADJ 3
24V power voltage adjustment
1) Put the multi-meter on the 24V line of the DC main PWB and
GND.
2) Turn VR702 on the DC main PWB to adjust so that the voltage is
24.0V.
ADJ M24
Manual paper feed size detection level
adjustment
This adjustment must be performed in the following cases:
When the manual paper feed tray section is disassembled. 
When the manual paper feed tray is replaced. 
When a U2 trouble occurs. 
When the PCU main PWB is replaced. 
When the EEPROM of the PCU main PWB is replaced. 
1) Execute SIM 40-2.
2) Extend the manual paper feed guide fully.
3) Press [MAX POSITION] on the LCD of the operation panel to
highlight it.
4) Press [EXECUTE] on the LCD of the operation panel to highlight
it.
If normal, the highlight is shifted from [MAX POSITION] to [MIN
POSITION].
5) Narrow the manual paper feed tray guide fully.
6) Press [EXECUTE] on the LCD of the operation panel to highlight
it.
Check that [COMPLETE] is highlighted.
ADJ M25
OHP sensor adjustment
This adjustment must be performed in the following cases:
When the OHP sensor is replaced. 
When the OHP sensor is disassembled.
When a U2 trouble occurs. 
When the PCU main PWB is replaced. 
When the EEPROM of the PCU main PWB is replaced. 
1) Enter the SIM 40-5 mode. 
2) Set A4 (11 
×
 8.5) paper to the manual paper feed tray.
3) Press the EXECUTE key. 
Paper in the manual paper feed tray is fed and stopped at the OHP
sensor section. 
The sensor LED current level is automatically adjusted so that the
specified (target) output of the OHP sensor is supplied. 
After adjustment, paper is discharged and the result data is displayed.
When the adjustment is completed normally, ADJUSTMENT COM-
PLETE is displayed. When an error occurs, ADJUSTMENT ERROR
is displayed.
7 –  46
Page of 2
Display

Download Sharp AR-C270 (serv.man12) Service Manual (Repair Manual)