Sharp FO-2080 Spezifikationen PDF herunterladen (Seite 78)

ADJ 1

Charging (main charger) voltage

adjustment

∗

Adjustment value

Range (MIN) –1050 V

Range (MAX) –1200 V

Standard value –1100 V

Default –1100 V

∗

Program used

Test command (Simulation) MODE Normal

MAIN CODE 8

SUB CODE 2

∗

Execution condition (time)

Enforcement

time

JOB No Content

S 009/Ua 004 When replacing the High

voltage/motor drive PWB unit

Cycle —

Condition 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.

∗

Work content

1) Connect between the power PWB and the MCU 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 charging voltage (main charer) is out-

putted.)

4) Measure the charging (main charger) voltage with a digital multi-

meter (effective value meter, input impednce 1000MΩ or above).

Adjust VR801 so that the output voltage is –1050 ∼ –1200 V.

Before measurement, connect the capacitor and the diode to the

tip of the digital multi-metar as shown below.

∗

Troubles caused by improper work

1) Copy (print) defective (Insufficient density, background copy, dirt,

etc.)

2) The copy density cannot be adjusted in the proper range with SIM

46-1.

3) The photoconductor is damaged.

∗

After-work

JOB No. Content

ADJ M1 Copy density adjustment

∗

Necessary tools

Name Digital multi-meter/High voltage probe

Parts code/Price rank —

Note Internal impedance 1000 or above,

effective value measurement

Recommendable unit:

(FLUKE 87/FLUKE 80K-40)

Name Diode

Parts code/Price rank VHDSV03///-1

Note Other type withstand voltage of 2KV or

above can be used instead.

Name Capacitor

Parts code/Price rank VCKYQ3FB102K

Note Other type withstand voltage of 3KV with

1000pF can be used instead.

∗

Note

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

pedance of 1000MΩ 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.

FO-3800M

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