HP LaserJet 4 Service Manual - Page 151
Functional Overview 5-39 - error 51
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If a failure occurs during this period, the following errors may be displayed: 50 SERVICE This error occurs when the fusing roller fails to reach the correct temperature in the required time (see "50 SERVICE") in Chapter 7). 51 ERROR This error occurs when the BD signal is not received by the DC controller, (see "51 ERROR BEAM DETECT)" in Chapter 7). 52 ERROR This error occurs when the scanner motor fails (see "52 ERROR," Chapter 7). Functional Overview 5-39
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 |
 |
If a failure occurs during this period, the following errors may be
displayed:
50 SERVICE
This error occurs when the fusing roller fails to
reach the correct temperature in the required
time (see
“
50 SERVICE
”
) in Chapter 7).
51 ERROR
This error occurs when the
BD signal is not
received by the DC controller, (see
“
51 ERROR
BEAM DETECT
)
”
in Chapter 7).
52 ERROR
This error occurs when the scanner motor fails
(see
“
52 ERROR
,
”
Chapter 7).
Functional Overview 5-39