Service error codes (9xx.xx) (continued)

Error

Sub

Display text

Description

Action

code

codes

 

 

 

 

 

 

 

 

 

 

920

.22

Hot roll fell too far below

Bad thermistor, circuit, or cabling.

Go to “920.xx—Cold fuser

 

 

the desired temperature

Noisy thermistor signal.

service check” on page 2-87.

 

 

while printing. Fuser

 

 

 

Fuser not receiving AC power.

 

 

 

page count between

 

 

 

200,000 and 299,999.

• Poor supply line voltage.

 

 

 

 

 

 

 

 

Low voltage or incorrect lamp.

 

 

 

 

Incorrect hot roll.

 

 

 

 

 

 

 

920

.23

Hot roll too cool while

Bad thermistor, circuit, or cabling.

Go to “920.xx—Cold fuser

 

 

checking for slope

Noisy thermistor signal.

service check” on page 2-87.

 

 

change. Fuser page

 

 

 

Fuser not receiving AC power.

 

 

 

count between 200,000

 

 

 

and 299,999.

• Poor supply line voltage.

 

 

 

 

 

 

 

 

Low voltage or incorrect lamp.

 

 

 

 

Incorrect hot roll.

 

 

 

 

 

 

 

920

.24

Hot roll too cool when

Bad thermistor, circuit, or cabling.

Go to “920.xx—Cold fuser

 

 

heating to desired

Noisy thermistor signal.

service check” on page 2-87.

 

 

temperature after slope

 

 

 

Fuser not receiving AC power.

 

 

 

change. Fuser page

 

 

 

count between 200,000

• Poor supply line voltage.

 

 

 

and 299,999.

 

 

 

Low voltage or incorrect lamp.

 

 

 

 

 

 

 

 

Incorrect hot roll.

 

 

 

 

 

 

 

920

.26

Fuser is not increasing

Fuser is not receiving AC power.

Go to “920.xx—Cold fuser

 

 

in temperature even

• Poor supply line voltage.

service check” on page 2-87.

 

 

though the lamp has

 

 

 

 

 

 

 

 

been on for an extended

 

 

 

 

 

tim. Fuser page count

 

 

 

 

 

between 200,000 and

 

 

 

 

 

299,999.

 

 

 

 

 

 

 

 

 

920

.27

Fuser has been below

Bad thermistor, circuit, or cabling.

Go to “920.xx—Cold fuser

 

 

the desired temperature

Very noisy thermistor signal.

service check” on page 2-87.

 

 

for too long while media

 

 

 

Fuser not receiving AC power.

 

 

 

is in the nip. Fuser page

 

 

 

count between 200,000

• Poor supply line voltage.

 

 

 

and 299,999.

 

 

 

Excessive load on the fuser.

 

 

 

 

 

 

 

 

Low voltage or incorrect lamp.

 

 

 

 

Incorrect hot roll.

 

 

 

 

Abrupt change in temperature that

 

 

 

 

 

has disrupted control.

 

 

 

 

 

 

 

920

.31

Under temperature

Bad thermistor, circuit, or cabling.

Go to “920.xx—Cold fuser

 

 

during steady state

Fuser not receiving AC power.

service check” on page 2-87.

 

 

control. Fuser page

 

 

 

Poor supply line voltage.

 

 

 

count between 300,000

 

 

 

and 399,999.

Low voltage or incorrect lamp.

 

 

 

 

 

 

 

 

Incorrect hot roll.

 

 

 

 

 

 

 

Diagnostic information 2-11

Page 47
Image 47
Toshiba e-STUDIO500P manual During steady state Fuser not receiving AC power