AL-800 (serv.man6). AL800 840 Service Manual-Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 16

*

1) Copy (print) defective

(Insufficient density, background copy, dirt, etc.)

(Ghost)

2) The copy density cannot be adjusted with SIM 46-1.

3) Photoconductor damage

*

JOB No.

Content

ADJ M1

Copy density adjustment

*

Name

Digital multi-meter/High voltage probe

Parts code/Price rank

—

Note

Internal impedance of 1000M

Ω

 or

above, effective value measurement
(Recommendable unit: FLUKE
87/FLUKE 80K-40)

*

1) Use a digital multi-meter (effective value meter, internal im-

pedance of 1000M

Ω

 or above).

Connect the capacitor and the diode to the tip of the digital multi-
meter for measurement. If the above condition are not satisfied,
the proper measurement of voltage cannot be made.

2) Since a high voltage is outputted, be careful of electric shock.

*

Range (MIN)

+3200V

Range (MAX)

+3700V

Standard value

+3500V

Default

+3500V

*

Test command (Simulation)

MODE

Normal

MAIN CODE

8

SUB CODE

2

*

Enforcement
time

JOB No

Content

S 009/Ua004

When replacing the high
voltage/motor drive PWB unit

Cycle

—

Condition

1) Print (copy) density is too

dark or too light.
Though copy density
adjustment is executed
with the Test command
(simulation) 46-1,
satisfactory denstiy cannot
be obtained.

2) Ghost is generated.

*

1) Connect between the power PWB and the PCU PWB, the high

voltage/motor drive PWB unit and the operation unit with har-
nesses.

2) Manually turn on the cover switch and turn on the power.

3) Execute SIM 8-2.

(The transfer charger voltage is outputted.)

4) Measure the transfer charger voltage (D805) with the digital multi-

meter (effective value meter).

Check that the output voltage is +3200 

∼

 +3700V. If it is not in the

range, replace the high voltage/motor drive PWB unit.

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