ADJUSTMENT
IC BLOCK DIADRAM
IC, LAG668FT2
<TUNER SECTION>
1. AM IF Adjustment
L105 ....................................................................... 455kHz
2. AM Frequency range Adjustment
L104 ..................................................... 515 ± 5kHz<YZ1>
L104 ........................................ 517 ± 5kHz<YU,YL,YL1>
TC104 .............................................. 1670 ± 10kHz<YZ1>
TC104 ................................. 1775 ± 10kHz<YU,YL,YL1>
3
AM Tracking Adjustment
L101 ....................................................................... 600kHz
TC101 .................................................................. 1400kHz
4. FM Frequency range Adjustment
L103 ................................. 87.0 ± 0.1MHz <YU,YL,YL1>
L103 ............................................. 87.4 ± 0.1 MHz <YZ1>
TC103 ............................ 109.0 ± 0.1MHz <YU,YL,YL1>
TC103 ......................................... 108.3 ± 0.1MHz <YZ1>
5. FM Tracking Adjustment
L102 .................................................................... 88.0MHz
TC102 ............................................................... 108.0MHz
<TAPE PLAYER SECTION>
6. Tape Speed Adjustment
Settings :
• Test tape :
TTA–100
(TAPE CENTRE)
• Test point :
PHONES JACK (J1)
• Volume :
NON-CLIP
(MAX-10dB)
• Tape/Radio :
TAPE
• Tape select :
NORM
• Adjustment location : SFR1
Method :
Play back the test tape and adjust for 3000Hz
± 15Hz.
7. Head Azimuth Adjustment
settings :
• Test tape :
TTA–330
• Test point :
PHONES JACK (J1)
• Volume :
MAX
• Tape/Radio :
TAPE
• Tape select :
NORM
• Adjustment location : Head azimuth
adjustment screw
Method :
Play back the 8kHz signal of the test tape and
adjust so that the output becomes maximum.
SFR 1
A MAIN C.B
PHONES
J1
L104
L102
PVC1
TC101
TC103
TC104
TC102
BAR ANT
L105
L103
1
4
2
2
3
3
L101
VR1
6 7
6
VOLUME
5
IC1
PRACTICAL SERVICE FIGURE
<TUNER SECTION>
<FM SECTION>
Sensitivity :
(IHF, THD 3%)
Less than 17dB[at 88/98MHz]
Less than 18dB[at 108MHz]
Signal to noise ratio :
More than 50dB
[at 88/98/108MHz]
Distortion :
Less than 3%[at 98MHz]
Intermediate frequency : 10.7MHz ± 0.1MHz
FM stereo separation :
More than 16dB[at 98.0MHz]
<AM SECTION>
Sensitivity :
(S/N 10dB)
Less than 58dB
[at 600/1000kHz]
Less than 56dB[at 1400kHz]
Signal to noise ratio :
More than 28dB[at 600kHz]
More than 29dB
[at 1000/1400kHz]
Distortion :
Less than 5%[at 1000kHz]
Intermediate frequency : 455kHz ± 3kHz
<TAPE SECTION>
Tape speed :
3000Hz ± 60Hz
Wow & flutter :
Less than 0.50% (RMS)
Take-up torque :
35 ~ 50 g-cm (FWD, REV)
F.F torque :
More than 36 g-cm
Rew torque :
60 ~ 170 g-cm
Back tension :
3 ± 1.5 g-cm (FWD, REV)
S/N ratio :
More than 43dB (PB, DC)
Distortion :
Less than 3% (PB, DC)
Noise level :
Except YZ1: Less than 7.0mV
(PB, DC, VOL MAX)
YZ1: Less than 4.0mV
(PB, DC, VOL MAX)
Frequency response :
63Hz + 2/-4dB ~ 8kHz + 3/-4dB
Test tape :
TTA– 100
TTA– 210
TTA– 320 (120µ)
TTA– 330
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