Aiwa CSD-ED79 Service Manual page 14

ADJUSTMENT <TUNER / CD>
3
L003 (BAR ANT)
A
MAIN C.B
2
L004
3
TC001
L006
5
L005
IC001 IC002
L007
1 4
< TUNER SECTION >
1. AM (MW) IF Adjustment
L007 .............................................................................. 450 kHz
2. AM (MW) VT Adjustment
Settings : • Test point : TP3
• Adjustment location : L004
Method : Set to AM (MW) 1710kHz (HA, LH), 1602kHz (HR)
1611kHz (EZ) and adjust L004 so that the test point
is 6.0 ± 0.05V (HA, LH), 5.6 ± 0.05V (HR, EZ).
3. AM (MW) Tracking Adjustment
L003 .................................. 600kHz (HA, LH), 603kHz (HR, EZ)
TC001 ............................ 1400kHz (HA, LH), 1404kHz (HR, EZ)
4. FM VT Adjustment
Settings : • Test point : TP3
• Adjustment location : L006
Method : Set to FM 108MHz and adjust L006 so that the test
point is 6.0 ± 0.05V.
5. FM Tracking Adjustment
L005 ............................................................................. 108MHz
6. LW VT Adjustment<EZ>
Settings : • Test point : TP3
• Adjustment location : L051
Method : Set to LW 288kHz and adjust L051 so that the test
point is 4.5 ± 0.05V.
7. LW Tracking Adjustment<EZ>
L003 ............................................................................... 153kHz
TC051 ............................................................................ 288kHz
All manuals and user guides at all-guides.com
C
CD MAIN C.B
TP2 (VREF)
IC402
IC401
SFR430
IC404
TP1 (RF)
< CD SECTION >
8. Focus Bias Adjustment
Make the focus bias adjustment when replacing and repairing
the optical block.
+
TP3 (RF)
-
TP2 (VREF)
1) Connect an oscilloscope to the test points TP1 (RF) and TP2
(VREF).
2) Turn on the power switch.
3) Insert test disc TCD-782 (YEDS-18) and play back the
second composition.
4) Adjust SFR430 so that RF signal of the test point TP1 (RF)
is MAX and CLEAREST.
RF signal waveform
EYE PATTERN
Must be CLEAR and MAX
VOLT / DIV: 50mV
TIME / DIV: 0.5µs
21
PRACTICAL SERVICE FIGURE
<TUNER SECTION>
<FM SECTION>
IHF Sensitivity :
(THD 3%)
6
Signal to noise ratio :
Distortion :
Auto stop level :
6
Stereo separation :
Intermediate frequency : 10.7MHz
<AM(MW) SECTION>
Sensitivity :
S/N (10dB)
Signal to noise ratio :
Distortion :
Auto stop level :
Intermediate frequency : 450kHz
<LW SECTION> (EZ)
Sensitivity :
(S/N 10dB)
Oscilloscope Signal to noise ratio :
(DC range)
Distortion :
Auto stop level :
Intermediate frequency : 450kHz
MAX
<DECK SECTION>
Tape speed :
Less than 18dB
[at 87.5 / 98 / 108MHz] Wow & flutter :
Mono : More than 66dB Take-up torque :
Stereo : More than 58dB
[at 98MHz ] F.F & REW torque :
Less than 3% [at 98MHz ]
24dB ± 10dB
Distortion :
[at 87.5 / 98 / 108MHz]
More than 20dB [at 98MHz] S/N ratio :
Max Noise level :
Less than 48dB Min Noise level :
[at 600kHz]
Less than 46dB Erasing ratio :
[at 1000kHz] Test tape :
Less than 44dB
[at 1400kHz]
More than 30dB
[at 600 / 1000 / 1400kHz]
Less than 3%
[at 1000kHz]
Less than 70dB
[at 600kHz]
Less than 65dB
[at 1000kHz]
Less than 60dB
[at 1400kHz]
Less than 60dB [at 153kHz]
Less than 58dB at [198kHz]
Less than 56dB [at 288kHz]
More than 30dB
[at 153 / 198 / 288kHz]
Less than 3% [at 198MHz ]
Less than 80 / 75 / 70dB
[at 153 / 198 / 288kHz]
22
3000Hz +90 / -60Hz (TN-21ZVC-1816
3000Hz ± 90Hz (TN-51RV-240)
Less than 0.4% (R.M.S)
30 ~ 60g-cm (FWD) (TN-21ZVC-1816
20 ~ 60g-cm (FWD) (TN-51RV-240)
55 ~ 140g-cm (TN-21ZVC-1816)
55 ~ 120g-cm (TN-51RV-240)
Less than 3% (PB, 1kHz, DC)
Less than 5% (REC/PB, 1kHz, DC)
More than 35dB (PB, AC, DC)
More than 25dB (REC/PB, AC, DC)
Less than 45mV (PB, DC, AC, VOL
MAX)
Less than 1mV (PB, DC, VOL MIN)
Less than 1.2mV (PB, AC, VOL MIN)
More than 45dB
TTA–100
TTA–210
TTA–782
TTA–602 (NORMAL)