Chapter 5
Troubleshooting
Introduction
Before opening the unit, verify the customer’s complaint. If possible, save any customer data
stored in RAM. Perform a Hard Reset to return the unit to factory defaults thereby eliminating
any chance of operator error. Reinstall the operating system and objects files. Always check for
recently installed options and verify the installation.
Surface-Mount Devices
The removal and replacement of surface-mount devices requires training and the proper
equipment. If you do not have the training or equipment to remove or replace surface-mount
devices, contact the service department to order a board replacement. International service
technicians should contact their appropriate Young Chang Distributor.
Cables, Connectors
All cable connectors are keyed, and therefore cannot be reversed. Flat ribbon cables have locking
cable clips. Be sure to reapply the clips when connecting cables.
In some cases, tape secures cable connections or fastens cables to the bottom enclosure. Always
peel back the tape from one side when disconnecting cables so that the tape remains properly
positioned.
Using the Disk Drive
Formatting Floppy Disks
1. Insert a blank disk into the disk drive and press the Disk button to enter the Disk Mode
page.
Warning: So that you don’t accidentally format a connected SCSI device, be sure that the
LCD shows Floppy highlighted as the current disk.
2. The Format command is on the second Disk Mode page. Press the more> soft button to
advance the page. Press the soft button below Format. The display prompt changes to:
Format this floppy disk? Press the Yes soft button.
3. The LCD displays three soft buttons. Two soft buttons to select either 720K or 1.4M for the
disk format, and one soft button, Cancel, to exit. Select 720K for double-density or 1.4M
for high-density disks. If you insert a disk and select the wrong format, the format process
will fail.
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