4-1
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9845B/C Mainframe Troubleshooting 4
Troubleshooting Checklist
Here's a list of checkpoints when your 9845 doesn't seem to work at
all
or correctly. Several
items are identified
and
their respective reference page
in
the 9845B/C Mainframe Handbook
is
shown.
Checkpoint
Power source
Correct Voltage
Correct Frequency
Ample
Power Available
Proper Receptacle Contact
Proper Grounding
Noise/Interference Free
Power Cord;
Correct Connector
Polarity
Wiring Continuity
Plugged
In,
Receptacle and 9845
Mainframe Configuration;
Power Selector Switches,
Correct for Line Voltage
AC
Line Switch at
"I"
Position
Fuse,
Page
2-1
2-1
2-1
2-12
2-12
2-13
2-12
2-11
2-10
2-11
2-11
2-13
Correct Size, Rating and Type 2-10
Power Supply,
Proper Assembly for Option lXX or
2XX
9-7
Output Voltage Within Specifications 9-7
Correct
LED
Indications on Opt.
2XX
A81
9-7
Processors,
Correct revision for application. 9-8
Memory,
System
ROM-
Correct Revisions of
ROM
Chips
for
Application 7-2
Proper Type
for
CRT used 9-2
Correct Type for Keyboard Language 7-3
Proper Type for Processor
OptionROM-
Proper
Type for Application 7-2
Correct Revision for Application
Installed
in
Correct Location 2-7
Drawers
Properly Seated/Installed 2-7
Standard
RWM-
Correct Assemblies for Opt. lXX or
2XX
9-9
Option
RWM-
Block Jumpers
In
Correct Position 9-9
Sufficient Optional
RWM
for Application 3-3
Keyboard-
Correct
ROM
Chip
In
A27 for Language 7-3
Ribbon Cables Connected
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