Revox B261

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8261 SA
sEcTtoN
4/1
ALIGNMENT INSTRUCTIO}IS
8261
TUNER
Required
test
equipment
(for
all adjustments)
-
Digital
voltmeter
-
FM
standard-signal
generator
-
Stereo modulator
-
Generator 30
Hz
...
200 kHz, Ri 50 ohms
-
AF voltmeter
(up
to 200
kHz)
-
Frequency counter
-
Oscilloscope
with externally
triggerable
probe 10:1
-
RF voltmeter
Programming the required
receiving
frequencies
Twelve station selector
keys
should
be
programmed for the
following receiving
frequencies
before starting
with the
adjustments:
-
Station key 1
-
Station key
2
-
Station
key
3
-
Station
key 4
-
Station
key
5
-
Station
key 11
-
Station
key 12
-
Station key 13
-
Station key 14
-
Station key 15
-
Station key 16
-
Station key 17
The fol-Iowing instructions
refer to these
statj-on selector
keys.
4.I POWER SUPPLY I.126.720
4.I.1 Adjusting
the
+33
V
supply voltage
Required
test equipment
:
-
Digital voltmeter
Switch tuner on and
measure
the voltage against
ground
on
the
card edge connector
(or
on the corresponding
printed
conductor
of the master board):
+33
V
+0.5
V Adjustable
on
R24 with an insulated
screwdriver
87.5 MHz
90.0 MHz
98.0 MHz
106.0 MHz
108.0 MHz
91 .9 MHz
97.925
MHz
97.95
MHz
98.0
tqllz
98.05
MHz
98.075
MHz
98.1 MHz
Pin I