SHARP ETE287 Technical Report

Date: Nov. 9, 1993

ELECTRONIC TYPEWRITER: PA-3000III

1. CHANGE IN THE OPERATION MANUAL

2. COUNTERMEASURE TAKEN AGAINST A READ/WRITE ERROR

1. CHANGE IN THE OPERATION MANUAL

1) Model name: PA-3000III

2) General: A parts code in the operation manual for Brazil has been changed.

3) Action: ((For the production))

From the first product in July, 1993.

No. : ETE-287

2. COUNTERMEASURE TAKEN AGAINST A READ/WRITE ERROR

1) Model name: QL-W20

2) General: A SOS ROM has been added to the mask ROM as a temporary countermeasure against a

READ/WRITE ERROR. As a permanent countermeasure, a new mask ROM will be added.

3) Trouble

A DISK READ/WRITE ERROR occurs at a FILE STORE/RETRIEVE.

description:

4) Cause: It is caused by writing the NULL CODE in the sector in use when the TC signal turns active by

AC line noise in the state of FILE STORE.

5) Description changed:

The following have been added to the mask ROM (VHILH534GK-1). (1) A SOS ROM (Version No."B75U1") has been added. (2) An IC socket has been added to the IC3 and the above ROM has been mounted. (3) A jumper wire has been added to J9.

6) Application: From the Sept. production, 1993.

Parts change:

Ref

Model

No.

name

1 PA-3000III Brazil 4 - 10 TINSP5655CHZZ TINSP5655CHZA AP

2 QL-W20 U. Kingdom

1. Interchangeable. 4. Not interchangeable.

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 specified ones for maintaining the safety and performance of the set.

Version

P/G No.

6 — VHI27C02B75U1 BE

Current parts

Parts code Parts code

— QSOCZ2051SC32 AC

New parts

Effec-

Inter-

tive

Price

rank

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

6. Others.

Parts name

Operation manual (Type-G)

SOS ROM

IC socket

change-

time

ability

Jul. ’93 1

Sep. ’93 6 IC3

Note

Change (Q’ty: 1)

SHARP CORPORATION

Printer And Scanner Division

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