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ADJUSTMENTS
@
Instruments Required
e
Regulator Adjusting Steps
Signal Source
1. RF Signal generator (AM, FM).
For band
For stages on each band
2. IF sweep generator (Centered 455/468 kHz for AM
IF
and 10.7 MHz for FM).
Output Indicator
.
1. V.T.V.M.
2. Oscilloscope
RF frequency range
RF tracking
IF
RF frequency range
RF tracking
AM-IF Alignment
Alignment
indicator
—
Connect to
Oscilloscope
AM det.
output tab
AM IF sweep gen.
TP3 (AM
IF input)
AM-RF Alignment
:
Sweep centered
455 kHz (EE)
468 kHz (UK)
CFT601
IF T601
Maximum
Maximum
Min. Freq
Alignment
indicator
Signal source
AM signal gen
Connect to
L602
(OSC coil)
515 kHz
(Low end)
AM cet.
output tab
515 kHz
(Modulated)
Loop antenna
FM-IF Alignment
Signal source
indicator
Set radio dial to
Oscilloscope
Max
Sweep centered
FM det.
Max.
Ere
-
|FT501
Symmetrical
10.7 MHz
Output tab
.
ea
1FT502
response
equal height
Symmetrical
FM det.
output tab
Max. Freq.
response,
(Repeat 1 and 2 to obtain a balanced "'S" curve linearity.)
centered
indicator
87 MHz
10.7 MHz
FM signal gen.
V.T.V.M.
.
FM cet.
L505
;
109 MHz
FM cet.
TC-3
Connect to
FM |F sweep gen.
TP] (FM IF input)
Sweep centered
TP1(FM IF
i n p u t
npay
10.7 MHz
IF T503
FM-RF Alignment
Signal source
Maximum
Maximum
MPX Adjustment
@
19 kHz
@
MPX
Conditions:
Conditions:
Selector switch: FM
ST/MONO switch: STEREO
Dial position: detuned from station
Adjust SFR501
for 19 kHz
+ 30 Hz frequency at 19 kHz
test point (TP-5).
Carrier frequency: 98 MHz
Input Signal: 60 dB
Modulation:
Pilot signal 10%
Composite signal 90%
Modulation frequency:
1 kHz
Tune dial to 98 MHz and adjust SF R502 for optimum sepa-
ration (40 dB).
How to change the upper limit of FM frequency range from 109 MHz to 104 MHz.
(EE model only)
18 pF
88-251-180-01
88-251-180-01
Ceramic Capacitor
88-251-100-01
* Attach a 10 pF ceramic capacitor to the rear of the C514 on the tuner circuit board.
LEVEL
DIAGRAM
TUNER
TUNER
HIGH FILTER
RIAA EQ
TONE
AMP
(-12dB/oct)
(36 dB)
TAPE
(30dB)
[~
PHONO
esagMONITOR
LOUDNESS | VOLUME
$c]
S..
mids
7?
7?
g
=
OI SELECTORCY
Ce
|
mOOe
TONE CONTROL
POWER AMP
TAPE-2/PLAY
(AUX) bin AMP
BALANCE LOUDNESS
CONTROL
POWER AMP
fees owed]
-16.5dB
bee
TONE
TONE
TAPE-|
AMP
CONTROL
MONITOR , REC OUT ='6:2e8
a
MONITOR
DIN AMP
Peel
TAPE™|
es
AUX(TAPE -2)
~16.54B
-12.5 dB
O
ree
J
-22.5dB
PHONO
O
- 52.5dB
PROTECTOR
S
20dB 4
25\
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