Tait T800 SL2 25W User Manual

C5.14 T854 Fault Finding M8SL2-00-002-812
© Copyright Tait Electronics Limited August 2004. All rights reserved.
5.7.4 T854 Drive Amplifier
12.9V on Q334
collector?
Check continuity
of power rails
& DC paths to
Q333 & Q332.
Exciter OK
Replace coaxial
Link and go to
PA flow chart
Key exciter
& lock
synthesiser.
NN
YY
Y
Check VCO.
N
Y
Y
N
Y
Y
N
Y
Check 9V &
13.8V supplies.
Check
regulators.
Check temp.
shutdown
circuit.
N
Y
N
Y
N
Y
3.3V on Q337
collector?
13.6V on Q336
collector?
11.5V on
IC350 pin 7?
N
Check lock det.
path back to
synth. IC740,
IC750, Q325.
Check TP305
>+8V.
Check TP320
<0.6V.
Check Q330,
Q325 Q326
>2V RF at
VCO output?
>1V RF
at R381?
N Check attenuator
pad #R517, #R518,
#R519.
>0.5V RF at
Q337 base?
Check C355, C358,
C360, Q350, D340,
D380, D360, L320.
N
Check Q350.
>2.5W at
Sk310?
Check Q336.
>5V RF at
C361
Key exciter
& lock
synthesiser.
Check
Q334 Q3814a
paths between
Ic350 Q334
And Q326.
& signal path.
From collector
To Sk310

Tait T800 SL2 25W Specifications

General

Brand	Tait
Model	T800 SL2 25W
Category	Accessories
Language	English