– 30 –
ADJUSTMENT <TUNER / DECK / FRONT>
< TUNER SECTION >
1. Clock frequency Check
Settings :
• Test point :
TP2 (CLK)
Method :
Set to AM(MW) 1602kHz and check that the test
point is 2052kHz
±
45Hz.
2. AM VT Check <HS only>
Settings :
• Test point :
TP1 (VT)
Method :
Set to AM 1602kHz and check that the test point is less
than 8.0V. Then set to AM 531kHz and check that the
test point is more than 0.6V.
3. AM Tracking Adjustment <HS only>
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location : L951(1/3)
Method :
Set to AM 999kHz and adjust L951(1/3) so that the
test point becomes maximum.
4. MW VT Adjustment <HR only>
Settings :
• Test point :
TP1 (VT)
• Adjustment location : L953
Method :
Set to MW 1602kHz and adjust L953 so that the test
point becomes 8.0V
±
0.05V. Then set to MW 531kHz
and check that the test point is more than 0.3V.
5. MW Tracking Adjustment <HR only>
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location :
L952 .................................................... 603kHz
TC941 ................................................ 1404kHz
Method :
Set up TC941 to center before adjustment.
The level at 603kHz is adjusted to MAX. by L952.
Then the level at 1404kHz is adjusted to MAX. by
TC941.
6. SW VT Adjustment <HR only>
Settings :
• Test point :
TP1 (VT)
• Adjustment location : L942
Method :
Set to SW 17.9MHz and adjust L942 so that the test
point becomes 8.0V
±
0.05V. Then set to SW 5.9MHz
and check that the test point is more than 0.3V.
7. SW Tracking Adjustment <HR only>
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location :
L941 .................................................... 5.9MHz
TC943 ................................................ 17.9MHz
Method :
Set up TC943 to center before adjustment.
The level at 5.9MHz is adjusted to MAX. by L941.
Then the level at 17.9MHz is adjusted to MAX. by
TC941.
8. AM IF Adjustment
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location :
L802 .................................................... 450kHz
9. FM VT Check
Settings :
• Test point :
TP1 (VT)
Method :
Set to FM 87.5MHz and check that the test point is
more than 0.5V. Then set to FM 108.0MHz and check
that the test point is less than 8.0V.
10. FM Tracking Check
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
Method :
Set to FM 98.0MHz and check that the test point is less
than 9dB
µ
V.
11. DC Balance / Mono Distortion Adjustment
Settings :
• Test point :
TP3, TP4 (DC)
• Adjustment location : L801
• Input level :
60dB
µ
V
Method :
Set to FM 98.0MHz and adjust L801 so that the
voltage between TP3 and TP4 becomes 0V
±
0.3V.
Then check that the distortion is less than 1.3%.
12. Output Level Check
<AM(MW)>
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Input level :
74dB
µ
V
Method :
Set to AM(MW) 999kHz and check that the test point
is 74mV
±
3dB.
<FM>
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Input level :
60dB
µ
V
Method :
Set to FM 98.0MHz and check that the test point is
320mV
±
3dB.
13. FM Separation Check
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Input level :
60dB
µ
V
Method :
Set to FM 98.0MHz and check that the test point is
more than 25dB.
< DECK SECTION >
14. Tape Speed Adjustment (DECK 2)
Settings :
• Test tape :
TTA–100
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location : SFR1
Method :
Play back the 3kHz signal of the test tape and adjust
SFR1 so that the test point becomes 3000Hz
±
5Hz
(FWD) and FWD SPEED
±
45Hz (REV).
15. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings :
• Test tape :
TTA–330
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location : Head azimuth
adjustment screw
Method :
Play back (FWD) the 8kHz signal of the test tape and
adjust screw so that the output becomes maximum.
Next, perform on REV PLAY mode.
16. PB Frequency Response Check (DECK 1, DECK 2)
Settings :
• Test tape :
TTA–330
• Test point :
TP8 (Lch), TP9 (Rch)
Method :
Play back the 315Hz and 8kHz signals of the test
tape and check that the output ratio of the 8kHz
signal with respect to that of the 315Hz signal is
0dB
±
5dB.
17. PB Sensitivity Check (DECK 1, DECK 2)
Settings :
• Test tape :
TTA–200
• Test point :
TP8 (Lch), TP9 (Rch)
Method :
Play back the test tape and check that the output level
of the test point is 110mV
±
3dB.
Содержание NSX-VC38
Страница 14: ... 14 SCHEMATIC DIAGRAM 1 MAIN 1 3 ...
Страница 15: ... 15 SCHEMATIC DIAGRAM 2 MAIN 2 3 DECK SECTION HEAD 1 ...
Страница 16: ... 16 SCHEMATIC DIAGRAM 3 MAIN 3 3 TUNER SECTION HR ...
Страница 17: ... 17 SCHEMATIC DIAGRAM 4 MAIN 3 3 TUNER SECTION HS ...
Страница 19: ... 19 SCHEMATIC DIAGRAM 5 FRONT DECK ...
Страница 21: ... 21 SCHEMATIC DIAGRAM 6 AMP 1F ...
Страница 22: ...WIRING 5 PT 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A B C D E F G H I J K L M N O P Q R S T U ...
Страница 23: ... 23 SCHEMATIC DIAGRAM 7 PT ...
Страница 24: ...WIRING 6 DECK HEAD 1 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A B C D E F G H I J K L M N O P Q R S T U ...
Страница 25: ... 25 IC BLOCK DIAGRAM ...
Страница 26: ... 26 ...
Страница 32: ... 32 CD TEST MODE ...
Страница 41: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 9420025 0251431 ...
