Panasonic Facsimile UF-590, Service Manual

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155
Note:
If an 021 series Error Code occurs, 021-25 (Thermistor Open) or 021-26 (Thermistor detected
temperature over 392
°
F (200
°
C), a pre-programmed recovery safety software is activated to protect the
unit and the service personnel during abnormal increase in temperature.
Once activated, this program is downloaded into the LPC PC Board’s SRAM, disabling the Fuser Lamp
and preventing it from turning ON again.
In order to reset this circuit, please follow the procedure below.
1) Reset the LBP Fuser by using Service Mode 7-1-2 (Section 5.1.7.) and Power OFF/ON.
2) Replace the Thermistor or Fuser Unit. If the problem persists.
3) Replace the SC PCB.
64 Unit detected “No Cassette”. 1. Cassette not installed or partially open.
2. Cassette Sensor defective.
65 Unit detected “Out of Paper”. 1. The Paper Cassette is empty.
2. Paper Detect Sensor defective.
81 No response from LP Controller. 1. SC PCB defective.
82 Illegal response from LP Controller. 1. SC PCB defective.
Error
Code
Description of Problems Cause