SHARP ETE294 Technical Report
Date: May 23, 1994
ELECTRONIC TYPEWRITER: PA-4000 etc.
[Parts changes]
1. CHAN GE OF T HE M AIN CON T ROL PW B PARTS
2. CHAN GE OF THE RI BB ON HO LD ER PARTS F OR THE CARR IA GE UNI T
3. CHAN GE AND ADDI TIO N OF T HE PARTS FOR IM PRO VI NG THE
PRODUCT QUALI T Y
4. CHAN GE OF T HE SO LEN OI D FIXIN G SC REW AND OF THE RATCHET
S SHAPE
1. CHANGE OF THE MAIN CONTROL PWB PARTS
1) Model name: PA-4000
2) General: The following main control PWB parts have been and will be changed.
No. : ETE-294
3) Description: The causes and descriptions are as follows.
No. Cause Description
(1)
(2)
(3)
Correction of P/G
error
(4)
(5)
(6)
Improvement of
(7)
printing looks
Improvement of the
(8)
productivity
(6) Addition of the PWB fixing screw (XUPSD30P08000)
Change of the resistor R39 & R40 from
4.7KΩ to 10KΩ
Disuse of the resistor R4 10KΩ VRD-RC2EY103J
Addition of the resistor R42 10KΩ
Addition of the resistor R43 4.7KΩ
Addition of the resistor R44 & R45 1KΩ
Addition of the control PWB fixing screw
(shown in the following figure)
Change of the mask CPU (IC4) VHIM38002-232 VHIM38002- 235
Change of the connector (18 pin) CN1 QCNCW5 1 1 1B C 1H QCNCW5132BC1H Jun. ’94
Parts code
Before changing Changed
VRD-RC2EY472J VRD-RC2EY103J
—
—
—
—
—
VRD-RC2EY103 J
VRD-RC2EY472 J
VRD-RC2EY102 J
XUPSD30P0800 0
Application
1st lot
Feb. ’94
4) Application: From the 1st lot - The a bove No. ( 1) ~ (6)
From the Feb. production in 1994 - The above No. (7)
From the June production in 1994 - The above No. (8)
SHARP CORPORATION
Printer and Scanner Division
Main control PWB
1/5
Orange
C
2. CHANGE OF THE RIBBON HOLDER PARTS FOR THE CARRIAGE UNIT
1) Model name: PA-4000/3000III/3000X/3020III/3030III/3030X, QL-100/200/300, SM-8400
2) General: The following parts of the ribbon holder for the carriage unit have been changed for better
reliability.
3) Description: The following are the troubles and the relative changes.
Model Trouble & countermeasure Change Before changing Changed Remarks
PA-4000
PA-4000
PA-3030III
PA-3020III
PA-3000X
PA-3030X
QL-100
QL-200
QL-300
SM-8400
PA-4000
The ratchet mechanism has
been added to prevent the ribbon
from looseness.
The ratchet gear shape and the
R idle gear shape have been
changed to improve defective
overstrike which brings about
poor printing looks by imperfect
ribbon winding.
The back tension spring shape
has been changed to prevent the
back tension spring and the
correction gear from touching
each other.
Change of the RF
gear
Addition of the RF
ratchet
Addition of the
gear spring
Shape change of
the ratchet gear
Shape change of
the R idle gear
Shape change of
the back tension
spring
NGERH5142CHZZ NGERH5129CHZZ
—
— MSPRD5206CHZZ
NGERH5130CHZZ NGERH5130CHZA
NGERH5131CHZZ NGERH5131CHZA
NGERH5131HHZZ NGERH5131HHZA
MSPRD5201CHZB MSPRD5201CHZC
PTME-5019CHZZ
Refer to (A) in the
following fig.
Refer to (B) in the
following fig.
Refer to (C) in the
following fig.
Refer to (D) in the
following fig.
Refer to (E) in the
following fig.
Refer to (E) in the
following fig.
Refer to (F) in the
following fig.
(B) Addition of the RF ratchet
(A) Change of the RF gear
(C) Addition of the gear spring
4) Application: From the 1s t lo t - PA -4 000
From the Jan. production in 1994 - PA-3020III/3030III
From the April production in 1994 - QL-100/200/300, PA-3000X/3030X, SM-8400
(E) Change of the R idle gear
(D) Change of the ratchet gear
(F) Change of the back tension spring
2/5
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