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Note:
On adjusting, use the transmitter TV set.
2. L-ch adjustment should be completed before performing R-ch
adjustment.
[Receiving
Frequency
Adjustment]
Preparation:
AF OSC
input phg
Feed a signal to TV set and connect a power supply.
1.
Volume control: Optional position.
2 .
Short-circuit: Q3 (Q53) Base - Emitter (Ground)
3 .
[Connection
and
Adjustment
SECTION 3
ADJUSTMENTS
Location]
frequency counter
Procedure:
I.
Connect a oscilloscope to SPI or SPX
2 .
Turn on the power switch on the headphones.
3 .
Adjust to make minute input level with changing the direction of the
emitting position of jig so that the noise appears on the waveform.
4 .
Adjust with L5 (L-ch) or L55 (R-ch) to maximize the reading on the
oscilloscope.
5 .
Adjust with Ll (L-ch) or L51 (R-ch) to maximize the reading on the
oscilloscope.
6 .
Release the short-circuit position.
Q3 (Q53) Base - Emitter (Ground)
Clock Frequency Check]
1.
Connect a frequency counter to TP2 and TP (GND).
2 .
Check the reading on the frequency counter becomes to the checking
value.
Checking value: 300 Hz - 390 Hz.
o s c i l l o s c o p e
0
I
+
.
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