Specifications

∗
C0500, C0510
Step Check Item Result Action
1
When the Fusing Unit Front Door is
removed and the Power Switch is turned
ON, do the Upper Fusing Roller Main and
Sub Heater Lamps H1 and H2 light up?
NO
•
To Step 4.
2
Is TH1 connected securely or clean?
YES
•
Connect TH1 securely or clean
TH1.
3
Disconnect CN24 (4P). Is the resistance
across CN24-2 and -3 on the Fusing Unit
side infinite?
YES
•
Change TH1.
NO
•
Change PWB-A.
4
With the Power Switch ON and the Front
Door closed, check the H1 and H2 ON/OFF
signals from the Master Board as described
below:
 
1) Select "IC Port Data Check".
2) Is the data of P51 (H1) and P46 (H2) on
PWB-A (IC1A) "0"? (See the 1/8 screen
on T-7.)
NO
•
Change PWB-A.
5
Disconnect CN6 (6P). Is there continuity
across CN6-1, 2 and 3 on the Fusing Unit
side?
YES
•
Change SSR1 or SSR2.
NO
•
Check H1, H2 and Fusing
Thermoswitch TF2 for
continuity.
∗
C0520, C0522
Step Check Item Result Action
1
Do the Upper Fusing Roller Main and Sub
Heater Lamps H1 and H2 remain lit up after
the copier has completed warming up?
NO
•
To Step 3.
2
By changing the H1 and H2 ON/OFF signals
from the Master Board, check whether H1
and H2 are turned OFF or not as described
below:
 
1) Select "IC Port Data Check".
2) Is the data of P51 (H1) and P46 (H2) on
PWB-A (IC1A) "1"? (See the 1/8 screen
on T-7.)
NO
•
Change PWB-A.
3) By pressing the "Change" key to change
the data from "0" to "1", are H1 and H2
turned OFF?
NO
•
Change SSR1 or SSR2.
3
Disconnect CN22 (8P). Is the circuit across
CN22-1 and -2 on the Fusing Unit side
shorted?
YES Change TH1.
NO
•
Change PWB-A.
T-88