Unico SQ Series, Service Manual

Page: 64 / 96

Trouble Shooting
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6.2 Deuterium lamp off
Deuterium lamp off
1.Solving the wiring from J7
to deuterium lamp
2.Replace deuterium lamp
Y
N
DC +49V on pin 2,3 of J7 on PCB
SST8.411.128A OK?
N
N
Replace PCB
SST8.411.128A
Y
DC +0.7V between pin 2,3(B,E) and
DC +43V between pin 1,3(CE) of J6
on PCB SST8.411.128A OK?
DC +3.85V on pin 3 of J9 on PCB
SST8.411.128A OK?
1. Solving the wiring of J5
on PCB SST8.411.128A
2. Replace transformer.
DC +3.85V on pin 2 of CZ7 on PCB
SST8.412.113 OK?
Solving the wiring from CZ7
to J9 on PCB
SST8.411.128A
Replace PCB SST8.412.113
AC 5.5V between pin 1,2 of
J5 on PCB SST8.411.128A
OK?
Y
1.Solving the wiring from J6
to 2SC2625
2.Replace 2SC2625
Y
N
AC 250V between pin 1,2
and AC95V between pin 3,5
of J4 on PCB
SST8.411.128A OK?
Y
DC +46V on pin 1 of J6 on
PCB SST8.411.128A OK?
Y
N
N
1. Solving the wiring of J4
on PCB SST8.411.128A
2. Replace transformer.
N
Y