2. Self diag functions
When a trouble occurs in the machine, the display indicates it and the machine stops immediately.
The display section differs in the Z-21 and in the Z-26.
<List of the self dial functions>
Display
Content
Major cause
Z-21
Z-26
All indicators except for the ready
indicator blink.
L3
After the motor starts rotation, the table
sensor (TPSP) signal keeps unchanged for 15
sec.
•
Table sensor defect
•
Main PWB defect
•
Power PWB defect
•
Drive unit defect
All indicators except for the ready
indicator blink.
L4
The motor rotary encoder (MRE) signal keeps
unchanged for more than 50ms after turning
on the power or after returning to the auto
shut off state.
•
Motor defect
•
Motor rotary sensor defect
•
Main PWB defect
•
An abnormal load is applied to the drive
section to prevent the motor from rotating
normally.
All indicators except for the ready
indicator blink.
L8
•
AE sensor output abnormality
•
AE sensor defect
•
The read value (AESP signal) of the white
mylar section in the back of the table glass
detected by the sensor is 0.2V or less.
•
Dirt on the light receiving section of the AE
sensor
•
White strip on underside of glass is dirty.
•
Full wave signal is not inputted for more
than 1.5 sec.
•
Copy lamp disconnection (breakage) (Does
not light up.)
•
Power PWB defect
•
Main PWB defect
All indicators except for the ready
indicator blink.
H2
Thermistor open detection
•
Thermistor breakage
•
Main PWB defect
All indicators except for the ready
indicator blink.
H3
Abnormally high temperature of the heater
roller
•
Main PWB defect
When the fusing temperature reaches 180°C.
•
Triac defect
All indicators except for the ready
indicator blink.
H4
Abnormally low temperature of the heater
roller
•
Heater lamp disconnection (breakage)
•
When a low temperature of 100°C is
detected for more than 3 sec during
copying.
•
Main PWB defect
•
Power PWB defect
•
The temperature does not reach 149°C
within 40 sec after turning on the power or
after auto shut off.
•
Thermostat open
Note
•
The Z-26 provides "P" display for paper feed error display, and paper empty display.
•
A thermostat (which is open at 165 C) is provided to prevent against abnormally high temperature in the fusing section.
[Reference]
Since the Z-21 has no copy quantity display, the trouble codes are not displayed.
When the display PWB of the Z-26 is connected to the Z-21, however, the trouble codes can be checked similarly with the Z-26.
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Содержание Z-21
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