94 Reciter Fault Finding TB8100 Service Manual
© Tait Electronics Limited September 2006
7. Measure the audio voltages at the following test points on the system
interface board:
balanced line in IC206 pin 1
IC211 pin 7
unbalanced line in IC202 pin 7
Both balanced line in voltages should be approximately 0.5V
pp
. If the
voltages are 0.5V
pp
or higher, the digital board is faulty. Return the
complete reciter to your nearest CSO for repair or replacement. If
the voltages are less than 0.5V
pp
, replace the system interface board.
The unbalanced line in voltage should be approximately 1V
pp
. If the
voltage is 1 V
pp
or higher, the digital board is faulty. Return the
complete reciter to your nearest CSO for repair or replacement. If
the voltage is less than 1V
pp
, replace the system interface board.
Note Figure 3.8 shows an isolated system interface board. The test
points are in the same locations on the other models of system
interface board.
Figure 3.8 Location of audio test points on the system interface board
IC206
IC211
IC202
1
7
7
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