Frontier LP7500 Service Manual page 865

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