TEST EQUIPMENT REQUIRED
1)
AM/FM Signal Generator
2) Video Signal Generator
3)
Digital Multimeter
4) Distortion level meter
ALIGNMENT PROCEDURES
1.
FM
MONO.
Distortion Adjustment
Step
Input
Signal
Source
Signal
Source
Signal
Outp~t
Level
Reception
Adjustment
Connection
Frequency
and
Modulatidn
Frequency
Point
500 uV/m (54 dB/m)
Signal generator output to
MONO 1
KHz/
98MHz
1
FM
antenna terminal. (75
98MHz
Dev.40KHz
53.3%0
(P2)
L201
ohm)
MONO
1KHz/
Dev. 75KHz 100%
..
2.
FM
Muting
Level
Adjustment
Turn variable resistor
R212
and stop at position
"TUNED"
is not shown (not indicated), then again turn the
variable resistor
R212
to the opposite revolution and stop at a position
,"TUNED"
is shown.
I
Step
Input
Signal
Source
Signal
Source
Signal
Outp11t
Level
Reception
Adjustment
Connection
Frequency
and
Modulation
Frequency
Point
10 uV/m (20 dB/m)
Signal generator output to MONO 1
KHz/
98MHz
1
FM
antenna terminal. (75 98 MHz
Dev.40KHz 53.3%
0
(P2)
R212
ohm) MONO
1KHz/
Dev. 75KHz 100%
D
....--
2
Over mentioned level
AUTO SCAN Only Confirm
+3dB
3.
FM
STEREO
Distortion Adjustment
Adjustment
Value
Distortion level
Minimum
atTAPE-OUT
Adjustment
Value
"TUNED"
indicate on FLD
"TUNED"
indicate on FLD
Adjust the
L
channel
with the RF signal modulated only L
channel
first and confirm the R
channel
with the RF signal
modulated only
R channel.
Step
Input
Signal
Source
Signal
Source
Signal
Output
Level
Reception
Adjustment Adjustment
Connection
Frequency
and
Modulation
Frequency
Point
Value
500 uV/m (54 dB/m)
Signal generator output to
L+R
1KHz/
98MHz
IFCOIL
Distortion level
1
FM
antenna terminal. (75
98 MHz Dev. 40KHz 53.3%
(P2)
in
Minimum
ohm)
PILOT 19KHz /
FRONT END at TAPE-OUT
Dev.
6KHz8%
•
-
L+R
1KHz/
Distortion level
2
Dev. 67.5KHz 90%
R218
Minimum
PILOT 19KHz /
Dev. 6.75KHz 9%
8
at TAPE-OUT
REMARK:
Adjustment with
R128
is
not necessary when the distortion level is less than 0.5% with adjusting IF coil.
4.
FM
STEREO
Separation Adjustment
Step
Input
Signal
Source
Signal
Source
Signal
Output
Level
Reception
Adjustment Adjustment
Connection
Frequency
and
Modulation
Frequency
Point Value
Signal generator output to
same specification as Output level
FM
STEREO
distortion
98MHz
Minimum
1
FM
antenna terminal. (75 98 MHz
adjustment.
(P2)
R211
at TAPE-OUT
ohm)
Input only L channel.
channelR
-
same specification as Output level
2
98MHz
FM
STEREO
distortion
98MHz
R211
Similar as
Reh
adjustment.
(P2) atTAPE-OUT
Input only
R channel.
channell
AVR80
7
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