Service manual

49 50
7. ALIGNMENT PROCEDURES
1. AM IF Adjustment
REMARK: For receiving antenna, the adapted one is available.
This adjustment is not necessary normally, because the coil LA06 is preset by the original supplier.
It is necessary when the incorrect usable sense and frequency response.
2. AM Tracking Adjustment (MW) [For N only]
4. AM auto stop Adjustment
5. FM MONO. Distortion Adjustment
3. AM Tracking Adjustment (LW) (ONLY N VERSION)
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to
transmission *loop antenna.
(*:Standard required loop)
999 kHz
(F, K, N, S)
1000 kHz
(U)
Level 300 µV/m (50dB/m)
Mod. 400 Hz 30%
Tuning point LA06
Output level
(L or R)
Maximum
at TAPE-OUT
Step
**Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to
transmission *loop antenna.
(*:Standard required loop)
603 kHz
(F, K, N, S)
600 kHz
(U)
Level 300 - 400 µV/m
Mod. 400 Hz 30%
LA01
Output level
(L or R)
Maximum
at TAPE-OUT
2
3
Output level
(L or R)
Maximum
at TAPE-OUT
CA01
603 kHz
(F, K, N, S)
600 kHz
(U)
1404 kHz
(F, K, N, S)
1400 kHz
(U)
Level 300 - 400 µV/m
Mod. 400 Hz 30%
1404 kHz
(F, K, N, S)
1400 kHz
(U)
Repeat step 1 and 2 until sensitivity be maximized.
Step
**Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to
transmission *loop antenna.
(*:Standard required loop)
171 kHz
Level 300 - 400 µV/m
Mod. 400 Hz 30%
LA03
Output level
(L or R)
Maximum
at TAPE-OUT
2
3
Output level
(L or R)
Maximum
at TAPE-OUT
CA08
171 kHz
270 kHz
Level 300 - 400 µV/m
Mod. 400 Hz 30%
270 kHz
Repeat step 1 and 2 until sensitivity be maximized.
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to
transmission *loop antenna.
(*:Standard required loop)
999 kHz
(F, K, N, S)
1000 kHz
(U)
500 µV/m (54 dB/m)
RA11
"TUNED"
indicate on FLD
2
Only Confirm
999 kHz
(F, K, N, S)
1000 kHz
(U)
AUTO
SCAN
"TUNED"
indicate on FLD
1000 µV/m (60 dB/m)
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
500 µV (54 dB)
MONO 1 kHz /
Dev.40kHz 53.3%
(K, N, S)
MONO 1 kHz /
Dev. 75 kHz 100% (U, F)
Distortion level
Minimum
at TAPE-OUT
1
Signal generator output to
FM antenna terminal. (75 Ω)
98 MHz
(K, N, S, U)
83 MHz
(F)
98 MHz
(P2)
L201
6. FM Muting Level Adjustment
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to
FM antenna terminal. (75 Ω)
10 µV (20 dB)
MONO 1 kHz /
Dev.40 kHz 53.3% (K, N, S)
MONO 1 kHz /
Dev. 75 kHz 100% (U,F)
R212
Turn the variable resistor R212 to no indication ("TUNED") point. And return that valuable resistor in opposite to the
"TUNED" indicate point.
"TUNED"
indicate on FLD
"TUNED"
indicate on FLD
2 Only Confirm
AUTO
SCAN
Over mentioned level
+3 dB
7. FM STEREO Distortion Adjustment
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to
FM antenna terminal. (75 Ω)
500 µV (54 dB)
L or R 1 kHz /
Dev. 40 kHz 53.3%
PILOT 19 kHz /
Dev. 6 kHz 8% (K, N, S)
L or R 1 kHz /
Dev. 67.5 kHz 90%
PILOT 19 kHz /
Dev. 6.75 kHz 9% (U, F)
IF COIL
in
FRONT END
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.
2
Distortion level
Minimum
at TAPE-OUT
Distortion level
Simimlar
as L ch.
at TAPE-OUT
R ch.
8. FM STEREO Separation Adjustment
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1 R211
2 R211
Output level
Similar as Rch
at TAPE-OUT
channel L
Signal generator output to
FM antenna terminal. (75 Ω)
same specification as
FM STEREO distortion
adjustment.
Input only L channel.
same specification as
FM STEREO distortion
adjustment.
Input only R channel.
Output level
Minimum
at TAPE-OUT
channel R
98 MHz
(K, N, S, U)
83 MHz
(F)
98 MHz
(K, N, S, U)
83 MHz
(F)
98 MHz
(P2)
83 MHz
(P2)
98 MHz
(P2)
83 MHz
(P2)
98 MHz
(P2)
83 MHz
(P2)
98 MHz
(P2)
83 MHz
(P2)
98 MHz
(K, N, S, U)
83 MHz
(F)
98 MHz
(K, N, S, U)
83 MHz
(F)
Only Confirm
LA01
CA01
LA03
R211
R212
L201
LA06
RA11
CA08
LW OSC
MW OSC
LPF
LPF
MW 600 / 603 kHz
LW 171 kHz
LW 270 kHz
AM IF
FM DIST
ST DIST
AM TUNED
SEP
FM MUT
A101
MW 1400 / 1404 kHz
FRONT
REAR
WA300J301-2 P104