SHARP SP1904 Technical Report

Date: Aug. 21, 1995

COPIER : Z-20

No. : SP-1904

1.PERMANENT MEASURES FOR
TROUBLESHOOTING WASHED-OUT COPIES.

1. Permanent measures for troubleshooting washed-out copies.

1.Model name: Z-20/25/27

2.General: Market action which was taken to alleviate an unfavorable market situation for our

company was reported in T/R No. SP-1885. The temporary and permanent measures
designed for the production process, which are described below, have been carried out
and are hereby reported.

3.Description:

Action

Date of
object

Description

Marking

Market Action

For Machines produced
before 1995 mid-March
production.

1 Change in the copy
resistance.

2 The main PWB volume
(VR201) should be
turned as far to the right
as possible.

(Reproted in T/R No. SP-1885.)

None.

Temporary action

For machines produced
between 1995 mid-March
production and the end of
1995 May production.

1 The same as explained
at left.

2 The same as explained
at left.

3 The resistance of the
main PWB (R785)
had been change from
910Ω to 470Ω.

The unit code printing area
of the main PWB has been
marked in red.

Change in the resistance of the main PWB.

Old New

R785 VRS-TS2AD911J → VRS-TS2AD471J
R720 VRS-TS2AD752J → VRS-TS2AD622J

Permanent action

For manchines produced
from 1995 June production.

1 The same as explained
at left.

2 The volume of the main
PWB has been set to
510µ during the
production process.

3 The resistance of the
main PWB (R785) has
been changed from
910Ω to 470Ω. Also, the
resistor (R720) has been
changed from 7.5kΩ to

6.2kΩ.

Change in the unit code of
the main PWB.

SHARP CORPORATION Reprography Division

1/2

Green

C

Change in the unit code of the main PWB.

Old New

Z-20(110V) CPWBN1020FC51 → CPWBN1020FC5A
Z-20(120/127V) CPWBN1020FC55 → CPWBN1020FC5E
Z-20(220/240V) CPWBN1020FC52 → CPWBN1020FC5B
Z-25(110V) CPWBN1020FC53 → CPWBN1020FC5C
Z-25(120/127V) CPWBN1020FC56 → CPWBN1020FC5F
Z-25(220/240V) CPWBN1020FC54 → CPWBN1020FC5D
Z-27(110V) CPWBN1020FC57 → CPWBN1020FC5G
Z-27(120/127V) CPWBN1020FC58 → CPWBN1020FC5H
Z-27(220/240V) CPWBN1020FC59 → CPWBN1020FC5I

Change in the unit code of the main PWB. Old. New. Note: The main PWB unit of the
100 V line has been established as service parts, but the main PWB of the 200 V line is
scheduled to be changed in accordance with the CE mark standards, and therefore has
not been established as service parts. A report of this matter will be sent separately.

4.Action: From the start of 1995 June production.

Ref.

Model

No.

Z-20
Z-25
Z-27

Z-20

1

Z-25

Z-27

<Interchange>

1. Interc ha ng ea bl e. 4. N ot i nt er ch an ge ab l e.

2. Current type can be used in place of new type.
New type cannot be used in place of current type.

3. Current type cannot be used in place of new type.
New type can be used in place of current type.

Parts marked with “ ” is important for maintaining the safety of the set. Be sure to replace these parts with

speci fied on es fo r m ai n ta in ing the sa fe ty an d pe r fo r ma nce o f the set .

name

Version P/G No.

10 -117 VRS-TS2AD911J VRS-TS2AD471J

All

10 105 VRS-TS2AD752J VRS-TS2AD622J Resistance[R720]

110V

series

120/127V

series

110V

series

120/127V

series

110V

series

120/127V

series

7 -18

10 -901

7 -18

10 -901

7 -18

10 -901

7 -18

10 -901

7 -18

10 -901

7 -18

10 -901

!

Current parts New parts

Parts code Parts code

CPWBN1020FC51 CPWBN1020FC5A

CPWBN1020FC55 CPWBN1020FC5E

CPWBN1020FC53 CPWBN1020FC5C

CPWBN1020FC56 CPWBN1020FC5F BT

CPWBN1020FC57 CPWBN1020FC5G BU

CPWBN1020FC58 CPWBN1020FC5H BS

Price

rank

AA

BS

5. Interchangeable if replaced with same types of
relate d parts in use .

6. Others .

Parts name

Resistance[R785]

Main PWB

Effec-

tive

time

1st lot

’95/6

Inter-

change-

ability

3

Note

2/2