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I have a MC2205 mcitosh amp sr. # AX6581. There

I have a MC2205 mcitosh amp sr. # AX6581. There is a thermistor with no identifying marks between the power in and the 10 amp 250 volt fuse holder. Can you tell me what it is ?

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You can use this temporarily

THR part number is NTC 5D -9

these might be near or similar to yours ST2R503B

Posted on Nov 14, 2009

  • Rommel Cana
    Rommel Cana Nov 14, 2009

    you can also series 100w incandescent bulb just to test if really the
    thermistor you are really having problem with, if the bulb glows bright
    then it is on the load , not on the thermistor



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Push the black cap in and turn.

I doubt that the fuse will fix it, though. Static sounds and then shutting down is a sign that something has gone wrong in the amp. It needs servicing by a competent tech.

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The thermistors, heater lamp and thermoswitches are components that make up the fusing unit, the lamp is in charge of heating rollers, thermistors regulate temperature and thermoswitches turn on and off according to heat in the fuser.
They can sell separately or sell the whole unit, it will depend on the suppliers and the model of your printer or copier.
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Canon iR2200 / iR2800 / iR3300
Некоторые ошибки зависят от того, какая опция установлена: например, ошибки E514 для Saddle Finisher-G1 и Finisher-J1 имеют разные причины.

Код ошибки Субкод Описание E000 0000 The reading of the main thermistor does not reach 30oC 1 sec after the main power switch is turned on. Or, it does not reach 70oC 2 sec thereafter E001 0000 The main thermistor detects 250oC or higher 0001 The main thermistor or the sub thermistor detects overheating (hardware circuit detection) 0002 The sub thermistor detects about 295oC or higher E002 0000 The temperature of the fixing film is as follows:
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  • has exceeded 140oC, but does not reach 150oC within 1 sec thereafter.
  • has exceeded 160oC, but does not reach 165oC within 1 sec thereafter
  • E003 0000 The main thermistor reading is lower than 140oC when paper is moved 0001 Low fixing temperature detection after standby (by sub thermistor) E007 0000 An error in the rotation of the fixing film is detected.
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    It does in fact appear to be a thermistor and the TH1 board marking seems to confirm that.
    What markings are on the component (it appears to be a power transistor of some kind) adjacent to it?

    If we can find a standard part number for it and you own some kind of meter, perhaps we can either eliminate or identify it as the original culprit.

    The failed thermistor is either acting as a temperature sensitive clamp to prevent lamp failure or regulates lamp intensity dependent on temperature.

    Maybe an email to NEC would get you the value of it (TH1) since I suspect a schematic or parts list will be hard to acquire.

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