Chapter V Troubleshooting; Preface; Troubleshooting Procedure; Note On Troubleshooting - Brother HL-4000CN Service Manual

CHAPTER V TROUBLESHOOTING

1.

PREFACE

1.1

Troubleshooting Procedure

The troubleshooting procedure can roughly be divided into two:
Level 1 troubleshooting
The level 1 FIP isolates the presence of various troubles including fail codes.
Level 2 Troubleshooting
Level 2 troubleshooting is a procedure in which troubles are classified by FIP, BSD or fail
codes list.
1.2 Notes on Troubleshooting
When replacing parts, check in advance that the connectors are connected securely.
When replacing parts, turn the power off.
If there are several troubles, you may refer to the same FIP again. Note that the
judgment may differ in the middle even when the FIP is identical.
When the power is on, do not touch the parts listed below. You may receive an electrical
shock.
HVPS
LVPS
When the power is on, do not remove drum cartridge. An invisible laser beam may
damage your eye.
Heat roll and pressure roll, and their peripheries become very hot. Do not touch when
they are still hot. You may get burnt.
WARNING
WARNING
WARNING
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