2-9. Micom
TROUBLE DIAGNOSIS
- 117 -
Problems
Symptom
Causes
Checks
Measures
Remarks
Bad PCB
All display
Bad connection
Bad connector
Visual check on connector
Reconnect
electric power.
LEDS are off.
between Main PCB
connection from main
connection.
connector.
and display circuit.
PCB to display PCB.
Defective PCB trans.
PCB Trans winding is
Check resistance of PCB Trans
Replace PCB Trans
Applicable to
cut.
input and output terminals with
or PCB.
model without
PCB Trans temperature
a tester. (If resistance is infinity,
dispenser.
fuse is burnt out.
trans winding is cut).
DefectivePCB electric
Defective regulator IC
Check voltage at input/output
Replace regulator.
Refer to electric
circuit parts.
(7812, 7805).
terminals.
circuit in circuit
explanation.
PCB electric terminal
Check fuse in PCB electric
Replace PCB fuse.
fuse is burnt out.
terminal with a tester.
STR Parts are
Check if STR No. 2 and 3 pins
Replace parts.
Applicable to
damaged.
are cut when power is off.
model with
dispenser.
Abnormal
Bad connection
Lead Wire connecting
Check Lead Wire terminals
Reconnect Lead
display LED
between Main PCB
main PCB and display
connecting Main PCB and
Wire and directly
operation
and display circuit.
PCB is cut or connector
display PCB with a tester.
connect defective
terminal connection is
contact terminal to
bad.
Lead Wire.
Defective LED
Defective LED.
Check if all LEDs are on when
Replace display
Refer to display
module.
Main PCB Test switch is
PCB.
circuit in circuit
pressed (or when both freezer
explanation.
key and power freezer key are
pressed at the same time for
more than one second.)
Summary of Contents for GC-B207
Page 32: ...EXPLATION FOR MICOM CIRCUIT 32 GC P L207 88 LED GC P L207 Bar LED GC P L207 Dot LED ...
Page 35: ...EXPLATION FOR MICOM CIRCUIT 35 GC P L207 Bar LED GC P L207 Dot LED ASSEMBLY ASSEMBLY ...
Page 44: ...EXPLATION FOR MICOM CIRCUIT 44 GC B C207 88 LED E A B C D ...
Page 50: ...EXPLATION FOR MICOM CIRCUIT 50 GC P L207 Bar LED GC P L207 Dot LED b a e d b a e d ...
Page 51: ...EXPLATION FOR MICOM CIRCUIT 51 GC B C207 88 LED GC B C207 Bar Dot LED b a e d b a e d ...
Page 62: ...EXPLATION FOR MICOM CIRCUIT 62 GC P L207 Bar LED ...
Page 63: ...EXPLATION FOR MICOM CIRCUIT 63 GC P L207 Dot LED ...
Page 64: ...EXPLATION FOR MICOM CIRCUIT 64 GC B C207 88 LED ...
Page 65: ...EXPLATION FOR MICOM CIRCUIT 65 GC B C207 Bar Dot LED ...
Page 66: ...3 2 Parts List EXPLATION FOR MICOM CIRCUIT 66 GC P L207 88 LED ...
Page 67: ...EXPLATION FOR MICOM CIRCUIT 67 GC P L207 88 LED ...
Page 68: ...EXPLATION FOR MICOM CIRCUIT 68 GC P L207 Bar LED ...
Page 69: ...EXPLATION FOR MICOM CIRCUIT 69 GC P L207 Bar LED ...
Page 70: ...EXPLATION FOR MICOM CIRCUIT 70 GC P L207 Dot LED ...
Page 71: ...EXPLATION FOR MICOM CIRCUIT 71 GC P L207 Dot LED ...
Page 72: ...EXPLATION FOR MICOM CIRCUIT 72 GC B C207 88 LED ...
Page 73: ...EXPLATION FOR MICOM CIRCUIT 73 GC B C207 88 LED ...
Page 74: ...EXPLATION FOR MICOM CIRCUIT 74 GC B C207 Bar Dot LED ...
Page 75: ...EXPLATION FOR MICOM CIRCUIT 75 GC B C207 Bar Dot LED ...
Page 77: ...EXPLATION FOR MICOM CIRCUIT 77 PCB ASSEMBLY DISPLAY PCB ASSEMBLY MAGIC DISPLAY ...
Page 78: ... GC P L207 Bar LED EXPLATION FOR MICOM CIRCUIT 78 ...
Page 79: ...EXPLATION FOR MICOM CIRCUIT 79 PWBASSEMBLY DISPLAY ...
Page 80: ... GC P L207 Dot LED EXPLATION FOR MICOM CIRCUIT 80 ...
Page 81: ...EXPLATION FOR MICOM CIRCUIT 81 PWBASSEMBLY DISPLAY ...
Page 82: ... GC B C207 88 LED EXPLATION FOR MICOM CIRCUIT 82 ...
Page 83: ...EXPLATION FOR MICOM CIRCUIT 83 PCB ASSEMBLY MAGIC DISPLAY ...
Page 84: ... GC B C207 Bar Dot LED EXPLATION FOR MICOM CIRCUIT 84 ...
Page 85: ...EXPLATION FOR MICOM CIRCUIT 85 PWBASSEMBLY DISPLAY ...
Page 93: ...CIRCUIT 93 GC P L B C207 Bar LED ...