Sharp Z-21, Service Manual

Page: 9 / 54

2. How to identify the production control
number
<<TD cartridge>>
The control number label is on the top of the TD cartridge, which
shows the year and the month of the production.
Destination No.
Japan Black option 1
Outside Japan Black option 2
Japan Red option 3
Outside Japan Red option 4
Japan Blue option 5
Outside Japan blue option 6
Japan Same package 8
Outside Japan Same package 9
<Drum cartridge>
The control number label is on the top of the drum cartridge, which
shows the year and the month of the production.
The last
digit of
the year Serial No.
(00001
∼
99999)
            
Destination
(1~9) The month
of the
production
Jan.
Sep.
Oct.
Nov.
Dec.
. . . 1
. . . 9
. . . 0
. . . X
. . . Y
.
.
.
.
.
.
31000819
The last
digit of
the year Serial No.
(00001
∼
99999)
            
Factory
(Normally "5") The month
of the
production
Jan.
Sep.
Oct.
Nov.
Dec.
. . . 1
. . . 9
. . . 0
. . . X
. . . Y
.
.
.
.
.
.
35000019
Display position
<Display example>
[5] INTERNAL STRUCTURE
1. PWB arrangement
Name Functions
1
Main PWB
In addition to overall function control,
this PWB also functions as the copy
lamp control circuit and the high
voltage output circuit (except for
developing bias). The paper exit
sensor in on this PWB also.
2
Power PWB
This PWB supplies power to each load.
It is equipped with the power switch,
the power inlet, the interlock switch,
document table sensor, and the paper
entry sensor and the circuit which
generates developing bias.
3
Operation PWB
Differs in the Z-21 and in the Z-26.
4
Copy lamp PWB
Different from the conventional models,
the PWB is equipped with a fuse bulb.
5
Motor control
PWB
Pulses to control the drive motor and
the paper start (PS clutch ON timing)
are generated by the encoder attached
to the drive motor shaft, and are
converted into electrical signals.
1
2
4
5
3
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