Toshiba 453 User Manual
13 - 6
13
e-STUDIO350/352/353/450/452/453
FUSER UNIT / PAPER EXIT SECTION
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
13.4.3 IH control circuit interface
The IH control circuit uses a photocoupler as an insulation against the secondary circuit.
The interface signals are as follows.
The IH control circuit uses a photocoupler as an insulation against the secondary circuit.
The interface signals are as follows.
(*Note) IH status signal
• When the temperature (due to insufficient cooling) of the switching element (IGBT) is abnormal:
“10: Coil is abnormal, IH FAN OFF” → After a certain period of time → Error [C480]
• When the upper limit of the power voltage is abnormal: “00: Initializing” → After a certain period
of time → Error [C470]
• When the lower limit of the power voltage is abnormal: “00: Initializing” → After a certain period
of time → Error [C470]
• Defective circuits → : “11: Abnormal circuit, IH coil abnormality” → Error [C490]
• Ready state after the initialization: “01: Ready”
CN No.
Name of signal
Direction
Definition
CN455-1
IH2 ON
LGC to IH
IH coil energization permitting signal
CN455-2
VDD
Switching signal of power setting
CN455-3
H1PWR1
CN455-4
H1PWR2
CN455-5
H1PWR3
CN455-6
H2PWR1
CN455-7
H2PWR2
CN455-8
H2PWR3
CN456-1
IH1 ON
LGC to IH
IH coil energization permitting signal
CN456-2
SG
CN456-3
NC
-
Not connected
CN456-4
H1ERR1
IH to LGC
IH status signal (*Note)
CN456-5
H1ERR2