AL-840 (serv.man6). AL800 840 Service Manual-Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 18

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 ADJ M8 
Power voltage adjustment
*
Location
*
Adjustment value
Range (MIN)
23.5V
Range (MAX)
24.5V
Standard value
24V
*
Execution time
Enforcement
time
JOB No
Content
S 009/Ua 001
When replacing a power in the
PWB unit.
*
Necessary condition
1) Adjust with the AC power voltage in the specified range (90 
110% of the standard power voltage).
*
Job content
1) Manually turn on the cabinet switch.
2) Turn on the power.
3) Put a digital multi-meter between the check point (24V) on the
power PWB and GND.
4) Turn the adjustment volume (VR601) on the power PWB and
adjust the 24V output to 24 
±
 0.5V.
*
Trouble caused by improper job
1) Circuit malfunction
2) Circuit parts damage
*
Necessary tool
Name
Digital multi-meter
Parts code/Price rank
ADJ M9
Copy lamp light quantity adjustment
*
Location value
Range (MIN)
3.9 V
Range (MAX)
4.1 V
Standard value
4.0 V
Default
4.0 V
*
Program used
Test command (Simulation)
MODE
Normal
MAIN CODE
63
SUB CODE
1
*
Enforcement time
Enforcement
time
JOB No
Content
S 004/Ua 001/
P 002
When replacing the scanner
(copy) lamp control PWB
When replacing the copy lamp
In case of E7 (05) trouble
In case of E7 (04) trouble
In case of E7 (12) trouble
In case of E7 (15) trouble
Cycle
Condition
Normal copy exposure is not
obtained.
*
Necessary condition
1) The scanner section must be clean.
ADJ M8(VR601)
7 – 18
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