Faulty Pre-Regi. Sensor - Star Micronics WinType 4000 Technical Manual

TROUBLESHOOTING

3.8 Faulty Pre-regi. Sensor

Step
1 (Initial Check)
Are any parts dirty, broken, malformed, incorrectly
installed or different from those listed in the specifica-
tions?
• Principle Parts to be Checked:
(1) Pre-regi. sensor (2) Feed roll assembly
(3) MCU PWB, (4) Harness assembly P/H
(5) LVPS assembly
2 (Check that power is supplied to the pre-regi. sensor.) *1
Is a voltage of 1.2VDC supplied between P18-1PIN
↔P18-2PIN?
3 (Check the ON signal for the pre-regi. sensor.) *1
Is a voltage of 1.2VDC supplied between P18-
3PIN↔P18-2PIN?
4 (Check the ON signal for the pre-regi. sensor.) *1
Is the voltage 0VDC between P/J18-3PIN↔P/J18-
2PIN when the exit sensor detects that paper is
present, and is a voltage of 5VDC supplied when the
exit sensor detects that paper is not present?
5 (Check the P/H harness assembly.)
Is there continuity between P18↔J181?
*1: Be sure the EP toner cartridge is installed and the front cover assembly is securely closed.
Check
– 138 –
Remedy
YES
Replace the part or
install the part
correctly.
See step 3.
See step 4.
Replace the MCU
PWB.
Replace the pre-regi.
sensor.
NO
See step 2.
See section 3.1
Faulty LVPS
Assembly 5VDC.
Replace the MCU
PWB.
See step 5.
Replace the P/H
harness assembly.