Frontier LP7500 - Page 865

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6. Electrical parts
66220
66220
Explanation of PCBs (Processor section)
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! Adjustments and precautions for PCB replacement
• Even if the circuit breaker of the machine is turned off, voltage is applied to terminal TA3 on processor relay PCB. If
processor relay PCB is to be replaced, be sure to turn off the circuit breaker of the main power supply.
• Wire the terminal strip TA3 according to the voltage specification of the main body.
• Check the voltages of P642, P645, P658, and P661.
IMPORTANT
• Replace the connector so that the voltage described on the connector lower part matches the applied one.
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! Unused connector
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! Component parts table
Connector No. Purpose Remarks
P647 Unused The starter jumper is connected at forced startup.
LED No. Purpose Status
LED1 SSR1 operation check (CD heater) ON during operation
LED2 SSR2 operation check (BF heater) ON during operation
LED3 SSR3 operation check (STB heater) ON during operation
LED4 SSR4 and 6 operation check (dryer heater 1) ON during operation
LED5 SSR5 and 7 operation check (dryer heater 2) ON during operation
LED6 SSR8 operation check (dryer heater 3) ON during operation
LED7 Relays X6 and X7 operation check (processing solution float switch) ON during operation
LED8 Relay X1 operation check (processing solution float switch safety thermostat) ON during operation
LED9 Relay X10 operation check (printer main relay) ON during operation
LED10 Relay X8 operation check (dryer cover) ON during operation
LED11 Relay X5 operation check (processor top cover) ON during operation
LED12 Relays X2, 3 and 4 operation check (dryer safety thermostat) ON during operation
LED13 Relay X9 operation check (dryer fan) ON during operation
LED14 DC+24 V power supply check On when the power supply is
turned on.
Test point No. Purpose Measurement with voltmeter Remarks
TP1 DC+24 V voltage measurement Possible
TP2 Ground Possible
TP3 Ground Possible
Fuse No. Rating Purpose Remarks
FL1 T5 A/250 V Protection circuit for power surges Cannot be replaced.
FL2 T5 A/250 V Protection circuit for power surges Cannot be replaced.
FL3 T5 A/250 V Protection circuit for power surges Cannot be replaced.
FL4 T5 A/250 V Protection circuit for power surges Cannot be replaced.
F1 T10 A/250 V Dryer heater
F2 T10 A/250 V Processing solution heater
F3 T5 A/250 V Dryer heater
F4 T6.3 A/250 V Dryer heater
F5 T3.15 A/250 V CD heater
F6 T3.15 A/250 V BF heater
F7 T5 A/250 V STB heater
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