ADJUSTMENT
<RADIO SECTION>
1. AM IF Adjustment
L105 ....................................................................... 450kHz
2. AM VT Check
Settings : • Test point : TP2 (VT)
Method : Set to AM 530kHz and check that the test
point is more than 0.8V. Then set to AM 1710
kHz and check that the test point is less than
8.7V.
3. AM Tracking Adjustment
L101 ....................................................................... 630kHz
VC101 .................................................................. 1440kHz
4. FM VT Adjustment
Settings : • Test point : TP2 (VT)
• Adjustment location : L103
Method : Set to FM 76MHz and adjust L103 so that the
test point becomes 1.0V ± 0.1V. Then set to
FM 108.1MHz and check that the test point
is less than 8.5V.
5. FM Tracking Adjustment
L102 ....................................................................... 76MHz
<TAPE PLAYER SECTION>
6. Tape Speed Adjustment
Settings : • Test tape : TTA–100 (TAPE CENTRE)
• Test point : Phones Jack (J1)
• Adjustment location : SFR1
• Tape/radio : TAPE
• S-BASS : OFF
• Volume : NON-CLIP(MAX -10dB )
Method : Play back the test tape and adjust SFR1 for
3000 ± 10Hz. Then confirm WOW is less than 0.50%.
7. Azimuth Adjustment
Settings : • Test tape : TTA–330/TTA–420
• Test point : Phones Jack (J1)
• S-BASS : OFF
• Tape/radio : TAPE
• Volume : MAX
• Adjustment location : Head azimuth adjustment
screw
Method : Play back the 8KHz signal of the test tape and
adjust screw so that the output becomes maximum.
MAIN C.B
A
PHONES
J1
6
VR1
VOLUME
SFR 1
6
IC1
1
3
L101
BAR ANT
5
4
2
4
3
L105
L103
L102
VC101
TP2(VT)
P HEAD
FWD
7
IC101
PRACTICAL SERVICE FIGURE
<TAPE SECTION>
Tape speed : 3000Hz ± 60Hz
Wow & flutter : Less than 0.50% (RMS)
Take-up torque : 35 ~ 50g-cm (FWD)
F.F torque : More than 36g-cm
Rew torque : 60 ~ 170g-cm
Back tension : 1.5 ~ 4.5g-cm (FWD)
S/N ratio : More than 43dB (YU,YL,YH,YJ)
More than 40dB (YZ)
Distortion : Less than 3.0%
Noise level : Less than 7.0mV (YU,YL,YH,YJ)
Less than 4.0mV (YZ)
(Vol MAX, without tape)
Less than 0.3mV (YU,YL,YH,YJ)
Less than 0.2mV (YZ)
(Vol MIN, without tape)
Frequency response : 63Hz + 1/-5dB ~ 8kHz ± 4dB
(NORMAL)
Test tape : TTA – 100
TTA – 210
TTA – 320 (NORM)
<TUNER SECTION>
Sensitivity :
(IHF, THD 3%) F M Less than 20dB [at 76MHz (YU,YL)]
Less than 20dB [at 87.5MHz (YH,YJ,YZ)]
Less than 20dB [at 90MHz (YU,YL)]
Less than 20dB [at 98.1MHz (YH,YJ,YZ)]
Less than 20dB [at 108.0MHz]
Sensitivity : AM Less than 59dB [at 630KHz]
(S/N 10dB) Less than 56dB [at 1000KHz (YU,YL)]
Less than 56dB [at 999KHz (YH,YJ)]
Less than 59dB [at 999KHz (YZ)]
Less than 56dB [at 1440KHz (YU,YL,YH,YJ)]
Less than 59dB [at 1440KHz (YZ)]
S/N Ratio F M More than 43dB [at 76MHz (YU,YL)]
More than 43dB [at 87.5MHz (YH,YJ,YZ)]
More than 43dB [at 90MHz (YU,YL)]
More than 43dB [at 98.1MHz (YH,YJ,YZ)]
More than 43dB [at 108MHz]
AM More than 25dB [at 630kHz (YU,YL,YH,YJ)]
More than 24dB [at 630kHz (YZ)]
More than 27dB [at 1000KHz (YU,YL)]
More than 27dB [at 999KHz (YH,YJ)]
More than 25dB [at 999KHz (YZ)]
More than 27dB [at 1440KHz (YU,YL,YH,YJ)]
More than 25dB [at 1440KHz (YZ)]
Intermediate frequency : FM 10.7MHz ± 0.1MHz
AM 450kHz ± 3KHz
FM stereo separation : More than 16dB [at 90MHz (YU,YL)]
More than 16dB [at 98.1MHz (YH,YJ,YZ)]
3029
(56 pages)
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