– 33 –
< TUNER SECTION >
1. Clock Frequency Check
Settings :
• Test point :
TP2 (CLK)
Method :
Set to MW 1602kHz and check that the test point is
2052kHz
±
45Hz.
2. MW VT Check
Settings :
• Test point :
TP1 (VT)
Method :
Set to MW 1602kHz and check that the test point is
less than 8.0V. Then set to MW 531kHz and check
that the test point is more than 0.6V.
3. MW Tracking Adjustment
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
• Adjustment location : L951 (1/3)
Method :
Set to MW 999kHz and adjust L951 (1/3) so that the
test point becomes maximum.
4. LW VT Adjustment
Settings :
• Test point :
TP1 (VT)
• Adjustment location : L942
Method :
Set to LW 144kHz and adjust L942 so that the test
point becomes 1.5V
±
0.05V.
Then set to LW 290kHz and check that the test point
is less than 8.0V.
5. LW Tracking Adjustment
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
• Adjustment location :
L941 ........................... 144kHz
TC942 ......................... 290kHz
Method :
Set up TC942 to center before adjustment. The level at
144kHz is adjusted to maximum by L941. Then the
level at 290kHz is adjusted to maximum by TC942.
6. AM IF Adjustment
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
• Adjustment location :
L802 ........................... 450kHz
7. FM VT Check
Settings :
• Test point :
TP1 (VT)
Method :
Set to FM 108.0MHz and check that the test
point is less than 8.0V. Then set to FM
87.5MHz and check that the test point is more than
0.5V.
8. FM Tracking Check
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
Method :
Set to FM 98.0MHz and check that the test point is
less than 13dB
µ
V.
9. DC Balance / Mono Distortion Adjustment
Settings :
• Test point :
TP3, TP4 (DC balance)
• Adjustment location : L801
• Input level :
60dB
µ
V
Method :
Set to FM 98.0MHz and adjust L801 so that the
distortion is minimum. Then check the voltage
between TP3 and TP4 is 0V
±
300mV.
10. Output Level Check
<MW>
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
• Input level :
74dB
µ
V
Method :
Set to MW 999kHz and check that the test point is
80mV
±
3dB.
<FM>
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
• Input level :
60dB
µ
V
Method :
Set to FM 98.0MHz and check that the test point is
315mV
±
3dB.
11. FM Separation Check
Settings :
• Test point :
TP5 (Lch), TP6 (Rch)
• Input level :
60dB
µ
V
Method :
Set to FM 98.0MHz and check that the test point is
more than 12dB.
ADJUSTMENT <TUNER / DECK / MICON>
Содержание Z-L700
Страница 13: ...13 SCHEMATIC DIAGRAM 1 MAIN 1 3 VM...
Страница 14: ...14 SCHEMATIC DIAGRAM 2 MAIN 2 3 DECK HEAD 1 HEAD 2...
Страница 15: ...15 SCHEMATIC DIAGRAM 3 MAIN 3 3 TUNER...
Страница 17: ...17 SCHEMATIC DIAGRAM 4 MICON DECK...
Страница 19: ...19 SCHEMATIC DIAGRAM 5 CNT L KEY CD DK1 LED DK2 LED MIC...
Страница 22: ...22 SCHEMATIC DIAGRAM 6 AMP 27 27 22 0 22 0...
Страница 23: ...WIRING 6 PT 23 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 24: ...24 SCHEMATIC DIAGRAM 7 PT...
Страница 25: ...WIRING 7 DECK HEAD 1 HEAD 2 25 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 26: ...26 IC BLOCK DIAGRAM IC M61506FP IC BD3876KS2 IC M65849BFP631D...
Страница 27: ...27 IC BA7762AFS IC LC72131D IC BU2092F IC LA1843...
Страница 28: ...28 IC BU2099FV IC BU1920FS IC BU9990 03FS...
Страница 31: ...31 FL BJ751GNK GRID ASSIGNMENT AND ANODE CONNECTION GRID ASSIGNMENT...
Страница 32: ...32 ANODE CONNECTION...
Страница 35: ...35 MECHANICAL EXPLODED VIEW 1 1...
Страница 41: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 9301978 9630472 0251431...