HP 9825A - Page 11

9825A/B Troubleshooting 4-1
Chapter 4
9825A1B Troubleshooting
Troubleshooting Checklist
Here's a list of checkpoints to be verified when a 9825 doesn't seem to work correctly. Several
items are identified
and their respective page number in the 9825 CE Handbook are shown for
reference.
Checkpoint
Power Source
Correct Voltage
Correct Frequency
Proper Receptacle Contact
Proper Grounding
Noise/Interference Free
Power Cord
Correct Connector Polarity
Wiring Continuity
Plugged in (Both ends)
Mainframe Configuration
Power Selector Switches
Voltage Select Correct
Power Switch On .
Fuse, correct size, rating and type
Power Supply
Output Voltages within Specifications
Power Harnesses connected to all assemblies
Processor
Clock Frequency within Specifications
All Memory Switches set correct (9825A/S only)
Memory and peripheral busses connected
Memory
9825A/S
Correct Jumper Positions on A22 and A23
Correct Option ROM for Application
9825B/T
A24 RWM Size Switch Set Correct for Application
A24 9862-9872 Plotter Switch Set Correct for Application
Correct Option ROM for Application
Keyboard, Ribbon Cables Connected
Tape
Good Fuse on A61
Ribbon Cables Connected
Data Cartridge Not Damaged
Clean Read-Write Head
Sense Lamps On
Printer
Proper Paper Installed Correctly
Print Head Correctly Aligned
Paper Advance Set Correct
Correct Wire Connections
Display
Connected to KDP board
Interfacing-Good fuses on A71
Page
2-1
2-1
2-2
2-1
2-2
2-2
8-5
6-1
6-2
3-1
3-1
9-2
9-2
6-2
6-3
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