Troubleshooting Checklist - HP 9845B/C CE Handbook

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9845B/C Mainframe Troubleshooting
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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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