Unico UV-2802 Service Manual

Trouble Shooting
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6.5 Filter check failed
Filter positioning failed
1. Solving the wiring of CN1 on
PCB SST8.414.103(104)
2. Replace PCB
SST8.414.103(104)
3. Replace PCB SST8.412.113
Filter motor works OK?
N
1. Solving the wiring of J9 on
PCB SST8.414.103(104)
2. Replace photo-coupler.
Y
Y
1. Solving the wiring of filter
motor
2. Solving the wiring of CN2
on PCB SST8.414.103(104)
3. Replace PCB
SST8.414.103(104)
4.Replace filter motor
5.Replace PCB
SST8.412.113
DC +1.2V on pin 3 of J9 on PCB
SST8.414.103(104) OK?
1. Solving the wiring CN1 on
PCB SST8.414.103(104) to
PCB SST8.412.113
2. Replace PCB
SST8.414.103(104)
N
Y
DC +12V on pin 5 of J5 on
PCB SST8.414.103(104)
OK?
Y
Refer 6.18
N
N
DC +12V on pin 1 of CZ1 on
PCB SST8.412.113 OK?
N
1. Solving the wiring of CN2
on PCB SST8.414.103(104)
2. Replace PCB
SST8.414.103(104)
3.Replace PCB
SST8.412.113
Y
The voltage level on pin 2 of J9
on PCB SST8.414.103 changes
within 0— 3.2V during the filter
positioning?

Unico UV-2802 Specifications

General

Brand	Unico
Model	UV-2802
Category	Measuring Instruments
Language	English