Frontier LP7700 - Page 862

6. Electrical parts
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Explanation of PCBs (Processor section)
*1. Table (You can check whether the pump is working by ON/OFF of LED16, 17 and 18.)
LED20 DC+5 V power supply check On when the power supply is turned on.
CD−W
Refilling water
pump
BF−W
Refilling water
pump
STB1−W
Refilling water
pump
STB2−W
Refilling water
pump
STB3−W
Refilling water
pump
STB4−W
Refilling water
pump
LED16 On Off On Off On Off
LED17 Off On On Off Off On
LED18OffOffOffOnOnOn
Cleaning pump
LED16 On
LED17 On
LED18 On
Test point No. Purpose Measurement with voltmeter Remarks
TP1 AC+24 V voltage measurement Possible
TP2 AC+24 V voltage measurement Possible
TP3 DC+5 V power supply measurement Possible
TP4 DC+24 V voltage measurement Possible
TP5 Ground Possible
TP6 Ground Possible
Fuse No. Rating Purpose Remarks
F14 T6.3 A/125 V DC+24 V power voltage protection
F15 T6.3 A/125 V DC+24 V power voltage protection
F16 T3.15 A/125 V AC+24 V power supply protection
LED No. Purpose Status
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