Frontier LP7500 - Printer I;O Pcb 3 (J)

Description of PCB (printer section)
1/2
6. Electrical parts
66040
66040
Printer I/O PCB 3 (J391253)
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! Function
• Relays the control signals and input signals of paper magazine mounts B and C, exposure advance unit, paper advance unit 1,
paper advance unit 2, and processor loading unit.
• Drive function of motors of paper advance unit 2.
• Drive function of control box cooling fans 2, 3, and 4.
• Relays the control signals of paper magazine lamp B/C.
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! Reference
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! Adjustments and precautions for PCB replacement
• None
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! Unused connector
• None
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! Component parts table
Layout diagram Symptom due to the poor connection of
wiring
Symptoms of fuse blowout
☞63000 ☞4202 ☞4252
LED No. Purpose Status
LED1 DC+5 V input check On when the power supply is turned on.
LED2 DC+24 V-3 input check ON when power is supplied, OFF when the interlock switch is
off.
LED3 DC+24 V-4 input check ON when power is supplied, OFF when the interlock switch is
off.
Test point No. Purpose Measurement with
voltmeter
Remarks
TP1 DC+5 V voltage measurement Possible
TP2 DC+24 V−3 voltage
measurement
Possible 0 V when interlock switch is off.
TP3 DC+24 V-4 voltage
measurement
Possible 0 V when interlock switch is off.
TP4 Ground Possible
G068359
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