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Date: Feb. 16, 1994
LASER PRINTER: JX-9400
CHANGE IN THE ICU CIRCUIT BOARD UNIT.
1.Model name: JX-9400 (models bound for the destinations listed below).
Destination: (AE / AL / AU only)
USA, Canada, Barbados, Dominican Republic, Central America, Colombia, Venezuela,
Costa Rica.
2.General: The ICU circuit board unit has been changed to improve productivity.
ICU Circuit board unit Old New
Parts code CPWBX0056GC51 CPWBX0063GC51
No. : LPE-184
The circuit changes and parts changes which have been carried out in accordance with
the above mentioned change in circuit board are as described below in numbers ➀to
➇.
➀ Discontinuation of 16.000 MHz crystal (RCRS-1014ACZZ).
➁ In order to change the CPU clock from 8 MHz to 9.83 MHz, the CPU has been
changed to a 10 MHz unit (VHI68EC000-10 68pin PLCC).
Mass production circuit board
(CPWBX0056GC51)
19.660MHz
19.66MHz
16.000MHz
16MHz
CPU
64pin DIP
8MHz
19.66MHz
CF78057 CF78057
CPU
68pin PLCC
New circuit board
(CPWBX0063GC51)
19.66MHz
19.66MHz
9.83MHz
➀ Discontinued crystal.
➁ CPU changed.
SHARP CORPORATION Printer and Scanner Division
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Orange
C
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➂ The program ROM has been changed from two 1M mask ROM (VHI27C0121EGC /
VHI27C0122EGC) units to one 2M mask ROM (VHILH532G65-1) unit.
1M mask ROM
Upper 8bit
1M mask ROM
Lower 8bit
CPU CPU
16 bit
DATA
2M mask ROM
16bit
➂
➃ The CG ROM has been changed from two 2M mask ROM (VHILH532HG3-1 /
VHILH532HG4-1) units to one 4M mask ROM (VHILH534FHJ-1) unit.
2M mask ROM
Upper 8bit
2M mask ROM
Lower 8bit
CPU CPU
16bit
DATA
4M mask ROM
16bit
➃
➄ Change in 256K DRAM.
Due to a production halt by the maker, the part corresponding to VHIMN41464A08
(location No. IC 1, 2) has been changed to VHILH2464-10C, a part with the same
specifications.
➅ Discontinuation of CPU pull down resistance.
The new circuit board does not have block resistance installed in locations no. RA 8,
12, 15, 17, or 19 (refer to the figure below).
➅ Not installed.
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➆ Addition of capacitors.
1. Two 1µF capacitors (RC-K1E104HCZZ) have been added between Vcc and GND
of LS244 (CG address).
+ 5v
+ 5v
Vcc
IC23
LS244
GND
0.1µF
Vcc
IC24
LS244
GND
CGA (8)
CGA (18 : 22)
CGA (0 : 7)
IC26
LS294
IC27
LS244
CGA (8)
CGA (18 : 22)
CGA (0 : 7)
2. A 330 pF capacitor (VCKYPU1HB331K) has been added between Vcc and GND of
the photo card.
330
+ 5V
60
Vcc
32
pF
GND
CN501
Added
➇ Discontinuation and change of screws.
1. The screw (RCORF1005ACZR 41A01) on the GND side of the 7.601 MHz crystal
and 19.660 MHz crystal has been eliminated.
2. The screw (RCORF1005ACZR) on the Vcc side of the 7.601 MHz crystal has been
changed to RCORF1009ACZZ (32A06).
+ 5V
+ 5V
0.1
0.1
+ 5V
19.660 MHz
14
41A01
7.601 MHz
12
6
41A01
34
41A01
41A0141A01
GND
58
0.1µ
32A06
0.1µ
7.601 MHz
12
+ 5V
0.1µ
41A01
0.1µ
6
19.660 MHz
14
41A01
41A01
39
58
GND
3.Action: From 1993 November production.
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JX9400 JX9400
1 ICU PWB unit
4/11
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JX9400 JX9400
1 ICU PWB unit
5/11
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Circuit diagram (1/5) of ICU circuit board (CPWBX0063GC51)
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Circuit diagram (2/5) of ICU circuit board (CPWBX0063GC51)
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Circuit diagram (3/5) of ICU circuit board (CPWBX0063GC51)
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Circuit diagram (4/5) of ICU circuit board (CPWBX0063GC51)
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Circuit diagram (5/5) of ICU circuit board (CPWBX0063GC51)
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List of Changed Parts for model JX - 9400.
Old circuit board parts
Parts code
68000CPU
VHI68000-08-1
Program ROM
VHILH531H89-1
Program ROM ➁
VHILH531H90-1
CGROM
VHILH532HG3-1
CGROM
VHILH532HG4-1
ICU Circuit board
QPWBX0056GCZZ
DRAM 256k
VHIMN41464A08
1kBIT EEPROM
VHICAT93C46//
Crystal 16.000MHz
RCRS-1014ACZZ
32Pin IC socket
QSOCZ2042SC32
41A01 screws
RCORF1005ACZR
22kΩ Block resistance
RMPTC8223QCKB
2.2kΩ Block resistance
RMPTC8222QCKB
22Ω Resistance
VRS-TP2BD220J-
560Ω Resistance
VRS-TP2BD561J-
2.2kΩ Resistance
VRS-TP2BD222J-
10µF/16V Electrolytic
capacitor
VCEAJA1CW106M
Jump line
VWVUDB6-00000
➀
➀
➁
—
New circuit board parts
Parts code
68000CPU
(VHI68EC000-10)
Program ROM
(VHILH532G65-1)
CGROM
(VHILH534F -1)
ICU Circuit board
QPWBX0063GCZZ
DRAM 256k
VHILH2464-10C
1kBIT EEPROM
VHICAT93C46//
—1 → 0
40 Pin IC socket
QSOCZ0002GCZZ
← 8 Ä 4
32A06 screws
RCORF1009ACZZ-
← 7 Ä 4
← 3 → 1
← 50 → 31
33Ω Resistance
VRS-TP2BD330J-
← 5 Ä 3
← 18 Ä 17
← 2 → 1
330pF Outside
capacitor
0.1µF Outside
capacitor
0Ω Resistance
VRS-TP2BD000J-
Q’ty
(Old → New)
1 → 1
1 Each → 1
(Total: 2)
1 Each → 1
(Total: 2)
1 → 1O
2 → 2
1 → 1 Change in name from 93C46HK to 93C46K.
2 → 1 Change in company: JAE → AMP
0 → 1
0 → 19
0 → 1
0 → 2
60 → 0
0 → 1
CPU clock change from 8MHz to 10MHz
(New parts authorization no. P-00309)
Change from 1Mbit ROM x 2 to 2Mbit ROM x 1
LH532G series authorization no.
Change from 2Mbit ROM x 2 to 4Mbit ROM x 1
LH534F series authorization no.
Change in parts from one with an access time
of 80ns to one with an access time of 100ns.
Discontinued in accordance with a change in
the CPU clock.
Note
New
parts
O
O
O
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