SHARP S183 Technical Report

Date: Apr. 19, 1996

COPIER : SF-2025

(Service Information)

No. : S-183

ADDITIONS TO THE SERVICE MANUAL AND PART GUIDE

1.Model Name: SF-2025/2030/2040 (Taiwan version only)

2.Description Since the T aiwan version of the SF-2025/2030/2040 differs from other models (It has an

added original size detector), we have added the information listed below.

Original sensing section

(1) Original sensing arm unit adjustment
➀ OC switch ON timing adjustment

Execute Sim. 41-01 (C → P → 0 → P → 4 → 1 → PSW → 1 → PSW).

.

Slowly tilt down the original sensing arm unit, loosen the original cover switch
actuator adjustment screw, and slide and adjust the actuator back and forth
so that the reverse display of OCSW is changed to the normal display when the
height of the arm unit top from the table glass is 36.5 ± 0.5mm. (If the original cover
switch ON timing is shifted, the original sensing function may be nullified.)

Original sensing arm unit

36.5 ± 0.5mm

Glass

Original cover switch actuator

Actuator adjustment screw

SHARP CORPORATION Reprography Division

1/5

Green

C

(2) Original sensing level adjustment
(Original sensing level input)
The reference value used to judge whether there is an original or not is inputted. It is
used also for monitoring the sensor operation.

➀

PSW 21 PSW40C

At this time, the ready lamp (RPL) lights up.

➁ Press the PRINT (PSW) switch without any original with the cover open. The ready

lamp goes off and lights up again. For the SF-2025, the interrupt lamp is lit at the same
time. (The sensor level without original is read.)

➂ Place a transfer paper of A3 size (11" x 17") on the original table, and press the

PRINT switch with the original cover open. (The sensor level with an original is read
and the judgement level of original presence is stored into memory.)

2/5

Sensor level without an original

Sensor level

Judgement level (center value)

Sensor level with an original

➃ Adjustment is completed.

(Each sensor level can be checked with Sim. 41-03.)
<Reference> Principle of sensing level setting
The sensor level with an original and that without an original are read and the center

(average) value of the two is read.
(Sensor check mode)
The photo sensor operation can be checked with Sim. 41-01. (When the original
sensing judgement level is inputted, the machine goes into the check mode
automatically.)
Photo sensor checking procedure