SHARP sp2255 Technical Report

COPIER(OPTION) : SF-A57 etc.

Date

Mar. 16, 1998

1.MEASURE TO DIMINISH THE OPERATING NOISE OF THE COOLING FAN.

2.NEW ESTABLISHMENT OF REINFORCED TYPE OF ROLLER HOLDER BRACKET.

No. : SP-2255

1. Measure to diminish the operating noise of the cooling fan.

1.Model Name: SF-A18/A57

2.General: A change has been carried out in the PBA control PWB and in the EPROM (the change

was carried out in the content of the software). This action has been carried out as a measure to diminish the operating noise of the cooling fan.

3.Description: At present, the cooling fan is set so that it is constantly operating while the power

supply is turned ON. With the carrying out of this action, however, a thermostat has been added to the PBA control PWB and a change has been carried out in a portion of the content of the software of the EPROM. After the changes have been carried out, the cooling fan will operate only periodically in accordance with temperature (thermostat) control.

• When a temperature of 62°C or more has been detected by the thermostat,

the cooling fan will be turned ON.

• When a temperature of 40°C or less has been detected by the thermostat,

the cooling fan will be turned OFF. However, during operations using the ADF, the fan will always be turned ON.

4.Interchangeability:

∗

There is no interchangeability between the individual parts affected by this change, and therefore the PWB and the ROM should be replaced as a set.

SF-A18 PBA control PWB 0CW2224K200H/ → 0CW2224K206// SF-A18 EP ROM 0CW2224K203F/ → 0CW2224K208// SF-A57 PBA control PWB 0CW2223K200I/ → 0CW2223K206// SF-A57 EP ROM 0CW2223K203F/ → 0CW2223K208//

∗

Please refer to the parts list for details concerning the other individual parts (in the PBA control PWB) affected by this change.

SHARP CORPORATION Reprography Division

1/2

Green

5.Action From the 1st lot of 1998 January production.

∗

For machines bound for the Germany (SEEG) and England (SUK) markets: From the 1st lot of 1997 December production.

2. New establishment of reinforced type of roller holder bracket.

1.Model Name: SF-A14

2.General: When copy operations are carried out on extremely thick original documents such as

books, there was a possibility of the roller holder bracket becoming misshapen if the ADF was pressed down with excessive strength. As a measure to alleviate this danger, a reinforced type of roller holder bracket has been established as a service part. (There is no danger of the roller holder bracket becoming misshapen under the conditions of normal usage, and therefore factory action has not been carried out.)

Roller holder bracket (reinforce type) 3 -31 0CW2166P127//

Ref.

Model

No.

SF-A18

SF-A57

SF-A18 10

SF-A57

SF-A18

SF-A57

SF-A18 10

SF-A57

SF-A18 10

SF-A57

SF-A18

SF-A57

2 SF-A14 ----

1. Interchangeable. 4. Not interchangeable.

2. Current type can be used in place of new type.

3. Current type cannot be used in place of new 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.

name

10 -901 0CW2224K200H/ 0CW2224K206// CB PBA-control PWB

10 -91

9 -901 9 -97

All

9 3

New type cannot be used in place of current type.

New type can be used in place of current type.

Current parts New parts

Parts code Parts code

0CW2224K203F/ 0CW2224K208// AZ EP ROM

0CW2223K200I/ 0CW2223K206// CA PBA-control PWB

0CW2223K203F/ 0CW2223K208// AZ EP ROM

0CWE240000364 AF Thermostat

0CWE73328K471 AB Capacitor

----

0CWE312001337 AE

0CWE312001347 AC

0CWE74458WE02 AD Connecter

0CW2166P127// BB Roller holder bracket ---- ----

Price

rank

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

6. Others.

Parts name

Transistor

Effec-

tive

time

Inter-

change-

ability

Note

2/2