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13. REC/PB Sensitivity Adjustment
Settings:
*
Test tape: TTA-602
*
Test point: TP301
¢
Input signal: 1kHz /10kHz (LINE IN)
«
Adjustment location:
SFR305 (Lch)
SFR306 (Rch)
Method:
Establish the record mode. Input the 1kHz
signal from LINE IN with the input level so
that TP301 has the signal level of 12mV.
Record the 1kHz signal, then play it back.
Adjust SFR so that the output level becomes
12mV+0.5dB.
PRACTICAL SERVICE FIGURE
< TUNER SECTION >-
(LH MODEL)
<FM SECTION>
IHF Sensitiviy:
(THD 3%)
Signal to noise ratio:
Distortion:
(Input: 54dB)
Stereo separation:
Intermediate frequency:
<AM SECTION>
Sensitivity:
(S/N 20dB)
Signal to noise ratio:
Cinput: 100dB)
Distortion:
Intermediate frequency:
- (EZ MODEL)
<FM SECTION>
THF Sensitiviy:
(THD 3%)
Signal to noise ratio:
Distortion:
Stereo separation:
Intermediate frequency:
<MW SECTION>
Sensitivity:
(S/N 20dB)
Signal to noise ratio:
(Input: 100dB)
Distortion:
Intermediate frequency:
4dB+6dB
(at 87.5/98.0MHz)
5dB+6dB (at 108MHz)
More than 65dB
(at 98.0MHz)
Less than 1.3%
(at 98.0MHz)
More than 25dB
(at 98.0MHz)
10.7MHz
54dB+6dB (at 600kHz)
52dBi6dB
(at 1000/1400kHz)
~ 41dB+36dB (at 1000kHz)
Less than 1.5%
_ (at 1000kHz)
450kHz
-2-14dB (at 87.5/98.0MHz)
0-16dB (at 108.0MHz)
More than 60dB
(98.0MHz)
Less than 1.3% (98.0MHz)
More than 25dB (98.0MHz)
10.7MHz
54dB+6dB (at 600kHz)
52dBi6dB
(at 1000/1400kHz)
41dB+36dB (at 1000kHz)
Less than 1.5%
(at 1000kHz)
450kHz
14. Bias OSC Frequency Adjustment
Settings:
¢
Test tape: TTA-601
¢
Test point: TP10 (R311)
¢
Adjustment location: L351
Method:
Set to the REC mode. Adjust L351 so that the
frequency at TP10 is 85.0kHz+1kHz.
<LW SECTION>
Sensitivity: .
Distortion:
Intermediate frequency:
< DECK SECTION >
Tape speed:
Wow & flutter:
(W.R.M.S)
Take-up torque:
FF torque:
REW torque:
Back tension:
PB Output level:
REC/PB Output level:
Distortion (REC/PB):
Noise level (PB):
Noise level (REC/PB):
Erasing ratio:
REC bias frequency:
Test tape:
49
64+5dB [at 144kHz]
62+5dB [at 198kHz]
60+5dB [at 290kHz]
Less than 1.8%
450kHz
3000Hz+2.0%
Less than 0.21%
30-55g-cm (FWD, REV)
75-160g-cm
75-160g-cm.
3+4g-cm (FWD, REV)
450mV+2dB (LINE OUT)
300mV+2dB (LINE OUT)
Less than 2%
(NORM, CrOQ2)
Less than 3mV
(DOLBY NR OFF, NORM)
Less than 2mV
(DOLBY NR ON, CrO2)
Less than 3.2mV
(DOLBY NR OFF, NORM)
Less than 2.2mV
;
(DOLBY NR ON, CrO2)
More than 60dB (125Hz)
85kHz
NORMAL
TTA-100
TTA-300
TTA-601
TTA-602
CrO2
TTA-200
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