TB 9-6625-2002-35
(4) Disconnect TI from the oscilloscope Vertical 1 input.
(5) Connect the TI ~ 600 OHM output to the audio analyzer INPUT HIGH.
(6) Position TI FREQUENCY Hz dial to 2.
(7) Position audio analyzer controls to measure frequency. If audio analyzer does
not indicate between 19.0 and 21.0 Hz, perform b below.
(8) Repeat (6) and (7) above at FREQUENCY Hz dial and MULTIPLIER
pushbutton settings listed in table 3. Audio analyzer will indicate within limits specified.
Test instrument
Audio analyzer indication
MULTIPLIER
FREQUENCY Hz
pushbutton
dial positions
settings
Min
Max
2
X100
190
Hz
210
Hz
.6
X100
57
Hz
63
Hz
.5
X1K
475
Hz
525
Hz
5
X1K
4750
Hz
5250
Hz
1.4
X10K
13,300
Hz
14,700
Hz
.6
X10K
5700
Hz
6300
Hz
.6
X100K
54
kHz
66
kHz
1
X100K
90
kHz
110
kHz
5
X100K
450
kHz
550
kHz
b. Adjustments
(1) Press POWER switch on the power module to off position.
(2) Remove TI from power module and remove cover from TI.
(3) Connect TI to power module, using extender and pull POWER switch to ON.
NOTE
For SN B073750 and up omit paragraphs 4, 5, 6 and 7.
(4) Connect audio analyzer INPUT HIGH to AGC TEST (fig. 1) and chassis ground.
Position audio analyzer controls to measure V dc.
(5) Set FREQUENCY Hz dial to 1 and press MULTIPLIER X1K pushbutton.
(6) Adjust R115 AGC ADJUST (fig. 1) for a -0.6 V dc indication on the audio
analyzer. (R)
(7) Disconnect audio analyzer inputs from the TI.
(8) Connect audio analyzer INPUT HIGH to TI ~ 600 OHM output. Position audio
analyzer controls to measure frequency.
(9) Set FREQUENCY Hz dial to 5 and press MULTIPLIER X1K pushbutton.
(10) Adjust FREQUENCY Hz dial for a 5 kHz indication on the audio analyzer.
(11) Loosen setscrews on the collar behind the front panel. Adjust dial until 5 is
aligned with the reference mark and tighten setscrews. (R)
(12) Press POWER switch on the power module to off position.
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