Sharp DOS HOSPITALITY (serv.man48) Service Manual / Technical Bulletin ▷ View online
2-1. Discontinuance of the CPU temperature detecting circuit (1).
1.Model Name:
UP-5700
2.General:
The redundant CPU temperature detecting circuit of the CPU PWB has been
discontinued.
3.Description:
Changed parts:
Ref. No.
Parts Code
Description
C2
VCKYTV1HB103K
Discontinued
C3
VCKYTV1HB103K
C4
VCKYTV1HF104Z
IC5
VHIKIA555F/-1
IC6
VHILM334S8/-1
R17
VRS-TS2AD202J
R18
VRS-TS2AD221J
There is no problem whether or not the parts listed above are packaged or not.
4.Action:
For production: From March 1998 production.
5.Other:
Attached supplementary documents: Circuit diagrams of the changed section.
2-2. Change carried out in the CPU PWB (2).
1.Model Name:
UP-5700
2.General:
An OS capacitor has been packaged in the 2.9 V power supply line of the CPU PWB.
In accordance with this, the redundant OS capacitor on the main PWB side has been
discontinued.
discontinued.
3.Description:
C18 (RC-EZ1572RC01) of the main PWB has been discontinued.
4.Action:
For field: No field action is necessary.
For production: From December 1997 production.
For production: From December 1997 production.
5.Other:
Attached supplementary documents: Circuit diagrams of the changed section, Figure 3.
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2-3. Change carried out in the CPU PWB (3).
1.Model Name:
UP-5700
2.General:
A change has been carried out in the CPU PWB. This action has been carried out as a
measure to improve productivity concerning the finishing operations on the added
capacitor.
capacitor.
3.Description:
A change has been carried out in the CPU PWB. The PWB version has been changed
from X7550BH-70 to X7550BH-83. Details of the content of the change are as follows.
from X7550BH-70 to X7550BH-83. Details of the content of the change are as follows.
<1> C59: 150
µ
F / 6.3 V
Added PWB pattern
<2> C60: 1000 pF
Added PWB pattern
4.Action:
For production: Running change from March 1998 production.
5.Other:
Attached supplementary documents: PWB silk screening of the changed section,
Figure 4.
Figure 4.
2-4. Change carried out in the CPU PWB (4).
1.Model Name:
UP-5700
2.General:
A change has been carried out in the pattern of the CPU PWB. This action has been
carried out as a measure to improve productivity of the finishing operations on the
carried out as a measure to improve productivity of the finishing operations on the
added jumper wire.
3.Description:
A change has been carried out in the CPU PWB. The PWB version has been changed
from X7550BH-83 to X7550BH-84. The finishing operations on the added jumper wire
from X7550BH-83 to X7550BH-84. The finishing operations on the added jumper wire
have been discontinued.
4.Action:
For production:
<1> UP-5700 : Running change carried out from August 1998 production.
<1> UP-5700 : Running change carried out from August 1998 production.
5.Other:
Attached supplementary documents: PWB pattern of the changed section, Figure 5.
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Fig. 1
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Fig. 1