AR-M550 (serv.man14). (7) Settings and adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 5

AR-M550/M620  SETTING AND ADJUSTMENTS  7 - 5

3) Go through the modes specified in Simulation 8-17.

4) Select the number that corresponds to the adjustment item (SHF

FRONT / SHF BACK) using the numeric keypad. 

5) Press the Start key. 

6) Set each adjustment item to the default value (enter the adjust-

ment value and then press the Start key). 

Note: The adjustment items (SHF FRONT / SHF BACK) correspond

to the AC component of the 'transfer belt cleaning mode voltage'
applied to the transfer roller, but  this voltage component cannot
be determined. If the voltage seems to be abnormal after setting
the default adjustment value, therefore, the high voltage PWB
(MC/DV/TC) should be replaced.

7) Select the number that corresponds to cleaning operation mode

(THV-) using the numeric keypad.

Note: The adjustment items (THV-) corresponds to the DC component

of the 'transfer belt cleaning mode voltage' applied to the trans-
fer roller.

8)  Press the Start key. 

9) Press the Start key to have the voltage output for 30 seconds. 

If the output voltage is not within the requirement, do the following
steps. 

The operation can be stopped with the CUSTOM SETTINGS key. 

10) Enter the adjustment value using the numeric keypad. 

11) Press the Start key.

(The adjustment value is put into memory, and the corresponding
voltage is output for 30 seconds.) 

Repeat steps 10 to 11 until the output requirement is satisfied.

This adjustment is needed in the following situations: 

• The high voltage power PWB (TC cleaning) has been replaced. 

• U2 trouble has occurred. 

• The PCU PWB has been replaced.

• The EEPROM of the PCU PWB has been replaced.

1) Connect the transfer section to the main body side using the trans-

fer extension harness (DHAi-3629FCZZ).

2) Remove the front frame cover of the duplex section, and remove

the rear frame cover of the transfer section.

3) Apply a digital multi-meter to the check pin of the high voltage

PWB (TC cleaning) and the chassis GND.

Press [START] key.

Press [CUSTOM SETTINGS] key.

Press [START] key.

Press [CUSTOM SETTINGS] key.
Or after 30sec output.

SIMULATION 8-17

1

TRANSFER ROLLER SETTING. SELECT 1-3, AND PRESS START.

1.SHV FRONT 

450

2.SHV BACK  

450

3.THV-  

30

SIMULATION 8-17

TRANSFER ROLLER SETTING. INPUT VALUE, AND PRESS START.

1.FRONT (0-600)

450

SIMULATION 8-17

TRANSFER ROLLER SETTING. EXECUTING···.

1.FRONT(0-600)

450