SHARP SP1541 Technical Report
Date: Feb. 25, 1993
COPIER : SF-7370
[Parts changes]
1. OPERATION BOARD PARTS CHANGES
2. IMPROVING THE DEVELOPING UNIT MAGNETIC SHEET SEPARATION
3. ADDING A WASHER TO THE CLUTCH UNIT AREA
4. USE OF A NEW AC POWER SUPPLY CABLE
1.Operation board parts changes
1.Model name: SF-7320/7370
No. : SP-1541
2.General: Note the following changes to the parts in the operation board.
3.Description: 1. Change in the print switch phototransistor (LD313) (to eliminate missing
display area)
2. Change in the diodes (D307-D311) (to provide more tolerance against
surge current)
3. Change in the operation panel screws
1. LD313 change
VHPSLR-320MC/ VHPSLR-40MC// Q’ty: 1
2. D307-D311 changes
VHDDSS133HV-1 VHDDSS131HV-1 Q’ty: 5
3. Screw changes
1) C03XCPSD30P06000 XEPSD30P06000 Q’ty: 6
2) C04XCPSD30P08000 XEPSD30P08000 Q’ty: 3
4.Action: (Factory action)
1. Since July 1992.
2. Running change since October 1992.
3. Running change since October 1992.
2. Improving the developing unit magnetic sheet separation
1.Model name: SF-7320/7370/7300/7350
SHARP CORPORATION Reprography Division
1/3
Green
C
2.General: Owing to variance in the cemented strength, the magnetic sheet might possibly become
separated after years. To avoid this, the material of the magnetic sheet is now changed.
3.Phenomenon: Toner dusting owing separation of the magnetic sheet.
4.Description: Material of the magnetic sheet is changed from rubber magnet to PET. From the
mid-May to November 1992, a glue was applied to avoid it from separating.
Magnetic sheet material change
(rubber magnet to PET)
5.Action: (Factory action)
Since December 1992. Since January 1993 for the SMF production.
3. Adding a washer to the clutch unit area
1.Model name: SF-7350
2.General: As the protuberance behind the upper frame hits the clutch unit when installing the
clutch, it might be installed askew. To avoid this, a washer is employed.
3.Description: Two 0.5 thick washers that comprise 1.0 thick are inserted into the clutch unit holding
screw behind the upper frame to avoid the problem.
Two 0.5 thick flat washers
Screw, M4x10
4.Action: (Factory action)
2/3
Behind the upper frame
Since August, 1992.
Clutch unit
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