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CHAPTER 5 SELF DIAGNOSIS
Code
• Thermistor (TH1, TH2;
displacement, poor contact,
open circuit)
• Fixing heater (H1; open circuit,
E003
crack)
• Thermal fuse (FU1;
malfunction)
• Triac (faulty)
• DC controller (faulty)
• Triac (faulty)
E004
• Heater ON detection PCB
(faulty)
• Fixing film (displacement, tear)
• Tension roller (displacement,
E007
malfunction)
• Fixing film motor (M4; faulty)
• Fixing film sensor (PS9; faulty)
• Main motor (M1; faulty)
E010
• DC controller (faulty)
• Counter (open circuit)
• DC controller (faulty)
E030
• Composite power supply
E064
(faulty)
• DC controller (faulty)
• Scanner cable (displacement, tear)
E202
• Scanner home position sensor
(PS1; faulty)
(keys on
• Scanner motor (M2; faulty)
control panel
disabled)
• DC controller (faulty)
5-2
Cause
Table 5-1-2
Description
• After the main thermistor (TH1) detection
temperature reaches 95°C, the main ther-
mister detects lower than 95°C for 200 ms.
• After the sub thermistor (TH2) detection
temperature reaches 70°C, the sub ther-
mister detects less than 70°C for 200 ms.
The fixing heater is identified as being on
when the fixing heater drive signal is off
(HTRD=0).
The fixing film sensor output remains '1' or
'0' for 1.35 sec or more.
Reference:
The fixing film takes about 1.3 sec to make
a full rotation.
The main motor revolution is not as speci-
fied (MLOCK=0) for 1 sec or more while the
main motor drive signal is on (MMD=1).
Checks are made immediately before the
counter turns on or off and when copying
operation is started.
Normal if drive signal = 0 at time the
counter turns on; Normal if drive signal = 1
at time the counter turns off.
Note: Checks are made only when the
counter is installed.
The high voltage of the composite power
supply is different from the setting.
The scanner does not return to the home
position within 5 sec when it is started.
E002 may be checked in 'No. 108' of
service mode.
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