Frontier LP7500 Service Manual page 862

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LED No.
LED20 DC+5 V power supply check
*1. Table (You can check whether the pump is working by ON/OFF of LED16, 17 and 18.)
CD−W
Refilling water
pump
LED16 On
LED17 Off
LED18 Off
Cleaning pump
LED16
LED17
LED18
Test point No.
TP1 AC+24 V voltage measurement
TP2 AC+24 V voltage measurement
TP3 DC+5 V power supply measurement
TP4 DC+24 V voltage measurement
TP5 Ground
TP6 Ground
Fuse No.
F14
F15
F16
Purpose
BF−W
Refilling water
pump
Off
On
Off
On
On
On
Purpose
Rating
T6.3 A/125 V
T6.3 A/125 V
T3.15 A/125 V
66210
Explanation of PCBs (Processor section)
STB1−W STB2−W
Refilling water Refilling water
pump pump
On Off
On Off
Off On
Measurement with voltmeter
Possible
Possible
Possible
Possible
Possible
Possible
Purpose
DC+24 V power voltage protection
DC+24 V power voltage protection
AC+24 V power supply protection
66210
Status
On when the power supply is turned on.
STB3−W STB4−W
Refilling water Refilling water
pump
On
Off
On
Remarks
Remarks
pump
Off
On
On
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