UP-X500 (serv.man17). UP-X500 Corrective action against CPU Freeze Problem — Sharp EPOS Technical Bulletin (repair manual)

Model
UP-X500 (serv.man17)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
216.17 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
EPOS / UP-X500 Corrective action against CPU Freeze Problem
File
up-x500-sm17.pdf
Date

View Sharp UP-X500 (serv.man17) Technical Bulletin online

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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1
CORRECTIVE ACTION
AGAINST THE CPU FREEZE
PROBLEM
1. Model Name: UP-X500 (CR-A352)
2.General:
In the field, they have experienced some problems such as
freezing in BIOS booting, etc.
Accordingly, the countermeasure is provided as follows.
3.Cause:
As the reserved pin of the CPU datasheet and recommended
circuit is internally a pin of JTAG function, the pin is not
connected via a terminal.
For this reason, the malfunction has occurred due to the
noise factor.
4.Action:
A Jumper wire (1pc), which directly connects the AF25pin of
CPU (reset signal) to GND, is to be added.
(For fields)
Take the above action on a problem-occurrence basis.
(For production)
This is to be implemented from April 2004 production.
From the midstream of May 2004 production, the pattern of the PWB is to be
changed and the jumper wire is to discontinue.
5.Parts Action:
No change is to be made for parts.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Download Sharp UP-X500 (serv.man17) Technical Bulletin

Here you can view online or download Sharp UP-X500 (serv.man17) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp UP-X500 (serv.man17) EPOS. Information contained in Sharp UP-X500 (serv.man17) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).