hp laserjet 50 service error message


DC voltage check: 5V, -5V and 24V check ok.

Fuser resistance checks: fuser lamp and thermoprotecter ~2 Ohms

Thermistor resistance check: 17.6K Ohms between pins 1, 2 on J332

This should read more than a 1M Ohms according to your test
page.

It appears that I need a new thermistor. Is it possible to
buy the thermistor alone?

Oddly, I took off the bottom cover and could not find the
thermistor bypass switch, SW205??? Is this something HP
omitted in newer models of the laserjet iii or am going
blind in my declining years?




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