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AM ADJUSTMENT
Band select switch : MW
Ste~
1
2
3
4
Adjusting
Circuit
IF
Tuning
coverage
Tracking
Repeat ac
Connection
SG
Position of
Input
output
Frequencl
tuning dial
Close the outpul
Connect sweep generator
450 KHZ
Low
terminal by
to IC101 pin No. 13
sweep
generator,
it
place to IC101
pin No.1 with
22KQ resistor in
series.
Connect AM SG Connect VTVM to
520 KHz
Low end
to TEST LOOP.
headphone jack with 32f2
dummy load.
1635KHz
High end
150 KHZ
Low end
285 KHz
High end
Connect AM SG Connect VTVM to
600 KHZ
600 KHZ
to TEST LOOP.
headphone jack with 32f2
dummy load.
m
250 KHz
250 KHz
ustment procedure
1 to 3 until maximum output achieve.
Adj.
T101
L105
TC3
NIL
CT101
L102
TC4
L108
CT102
VTVM
Oscilloscope
Maximum
Maximum
Maximum
.
Set the internal modulation
of signal generator to 30% 400Hz
FM ADJUSTMENT
Band select switch : FM
FM Dummy antenna : 75Q unbalance
m
1
IF
2
Tuning
coverage
3
Tracking
Connection
SG
Position of
Adjustment
VTVM
Frequency
tuning dial
Oscilloscope
Input
I output
No need to adjust
Connect
I Connect VTVM to
I 87.35 MHz
I Low end
I L104
] Maximum
'::to
'eadphone'ac
ANT1. And 32f2 dummy load.
Connect
Connect VTVM to
90.00 MHZ
90.00 MHZ
L103
Maximum
FM SG to
headphone jack with
ANT1. And 32Q dummy load.
Ground
106. OOMHZ 106. OOMHZ TC1
—
-.
.
Set the internal modulation
of signal generator to 22.5 KHz Dev. 400Hz
3-
- Quick Links:
- Tape Speed Adjustment
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