GE FRU-57QL Series Service Manual page 32

5. Main PCB
5-1. Basic Model
2
5
Function / Parts
NO
1 Make refrigerator cooler
2 Regulator IC ( 5V )
3 Fan Power Controller
4 Relay Power Controller
Current Fuse
5
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1
When consumer claim about the refrigerator's temperature follow this.
- Cut the J1 : Change the resistance and 1.5 degree down.
- Cut the J1 & J2 : Change the resistance and 3 degree down.
( Look 21 page in more details. )
Make voltage ( 12V - 5V ) to MICOM.
Voltage check of IC#6 ( Input : 12V, Output : 5V )
Receive signal ( 5 V ) from the MICOM.
Deliver singal ( 12V ) each electric device.
Check input and output voltage of MICOM and IC7
Check when each device does not work. ( 250V, 3.15A )
31
HOW TO CHECK EACH PART
3
4
Check Point
Check input and output voltage of Fan
#2 : Input
#5 : Output