TB 9-6625-2057-35
b. Adjustments. No adjustments can be made.
18. Distortion
a. Performance Check
(1) Connect OUTPUT 600 Ω to audio analyzer using voltage divider.
(2) Set RANGE switch to X1 and FREQ dial to 5.
(3) Adjust AMPLITUDE control fully cw. If audio analyzer does not indicate
distortion less than one percent (see fig. 1 for dB and % relationship), perform b below.
(4) Repeat technique of (2) and (3) above for RANGE switch and FREQ dial
settings listed in table 8. Audio analyzer will indicate less than one percent on all ranges.
Test Instrument
RANGE switch settings
FREQ dial settings
X10
5
X10
10
X100
1
X1K
10
X10K
10
b. Adjustments
(1) Set RANGE switch to X100 and FREQ dial to 10.
(2) Adjust R36 (fig. 4) for minimum distortion as indicated in audio analyzer (R).
19. Power Supply
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
a. Performance Check
(1) Connect OUTPUT 600 Ω to multimeter.
NOTE
For models that rechargeable batteries, connect multimeter
between junction of TI and C102 (fig. 5) and floating ground
(located on front panel binding post.)
(2) Position controls as listed in (a) through (c) below:
(a) FREQ dial to 10.
(b) RANGE switch to X100.
(c) AMPLITUDE control fully cw.
(3) Adjust DC BAL (rear panel) for a 0.0 V dc indication on multimeter.
