Toshiba e-STUDIO453 Service Manual page 8

12.4 Auto-Toner Circuit ..............................................................................................................12-4
12.4.1 General description . ................................................................................................12-4
12.4.2 Function of auto-toner sensor .................................................................................12-5
12.4.3 Adjustment using the temperature / humidity sensor . .............................................12-7
12.4.4 Adjustment using the drum thermistor ....................................................................12-7
12.5 Disassembly and Replacement . .........................................................................................12-8
13. FUSER UNIT / PAPER EXIT SECTION ......................................................................13-1
13.1 General Description ...........................................................................................................13-1
13.2 Operation ...........................................................................................................................13-1
13.3 Functions . ...........................................................................................................................13-2
13.4 Heater Control Circuit . ........................................................................................................13-4
13.4.1 Configuration . ..........................................................................................................13-4
13.4.2 Heating principle of IH Heater . ................................................................................13-5
13.4.3 IH control circuit interface .......................................................................................13-6
13.4.4 Relation between system configuration and IH output . ...........................................13-7
13.4.5 Temperature detection section . ...............................................................................13-8
13.4.6 Abnormality in the IH control circuit ......................................................................13-13
13.5 Control Circuit of Exit Motor ............................................................................................13-15
13.6 Exit Motor Drive . ..............................................................................................................13-15
13.7 Disassembly and Replacement . .......................................................................................13-16
14. AUTOMATIC DUPLEXING UNIT (ADU) .....................................................................14-1
14.1 General Description ...........................................................................................................14-1
14.2 Description of Operations . ..................................................................................................14-2
14.3 Drive of ADU ......................................................................................................................14-8
14.4 Flow Chart . .........................................................................................................................14-9
14.5 Disassembly and Replacement . .......................................................................................14-11
15. POWER SUPPLY UNIT ...............................................................................................15-1
15.1 Construction .......................................................................................................................15-1
15.2 Operation of DC Output Circuits ........................................................................................15-1
15.3 Output Channel ..................................................................................................................15-2
15.4 Fuse ...................................................................................................................................15-4
15.5 Configuration of Power Supply Unit ...................................................................................15-5
15.6 Sequence of Power Supply . ..............................................................................................15-6
15.7 AC Wire Harness ..............................................................................................................15-7
16. PC BOARDS ...............................................................................................................16-1
e-STUDIO350/352/353/450/452/453
CONTENTS
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