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ADJUSTMENT (TUNER / FRONT / DECK)
< 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 : TP4 (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 : TP8 (Lch), TP9 (Rch)
• Adjustment location : L951
Method :
Set to MW 999kHz and adjust L951 so
that the test point becomes maximum.
4. LW VT Adjustment
Settings :
• Test point : TP4 (VT)
• Adjustment location : L942
Method :
Set to LW 144kHz and adjust L942 so that the
test point becomes 1.3V
±
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 : TP8 (Lch), TP9 (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 : TP8 (Lch), TP9 (Rch)
• Adjustment location :
L802 ........................... 450kHz
7. FM VT Check
Settings :
• Test point : TP4 (VT)
Method :
Set to FM 108.0MHz and check that the test
point is less than 8.0V. Then set to FM
87.5 MHz and check that the test point is more
than 0.5V.
8. 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 13dB
µ
V.
9. DC Balance / Mono Distortion Adjustment
Settings :
• Test point : TP3,TP4 (DC balance)
TP8 (Lch), TP9 (Rch) (Distortion)
• 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
±
0.03V.
Next, check that the distortion is less than
1.2%.
10. FM Separation Check
Settings :
• Test point : TP8 (Lch), TP9 (Rch)
• Input level : 60dB
µ
V
Method :
Set to FM 83.0MHz and check that the test point
is more than 12dB.
Summary of Contents for CX-NHG2MD
Page 13: ...13 IC BLOCK DIAGRAM...
Page 14: ...14...
Page 16: ...16 SCHEMATIC DIAGRAM 1 MAIN 1 2 FUNCTION TAPE P SUPPLY P AMP SECTION...
Page 17: ...17 SCHEMATIC DIAGRAM 2 MAIN 2 2 TUNER SECTION...
Page 20: ...20 SCHEMATIC DIAGRAM 3 FRONT...
Page 21: ...WIRING 3 PT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H I J K L M N O P Q R S T U 21...
Page 22: ...22 SCHEMATIC DIAGRAM 4 PT...
Page 23: ...WIRING 4 DECK 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...
Page 24: ...24 FL 11 BT 177GNK GRID ASSIGNMENT ANODE CONNECTION PIN CONNECTION GRID ASSIGNMENT...
