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ADJUSTMENT <TUNER>(MX-NDPH2100)
< 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 : L981 (1/3)
Method :
Set to MW 999kHz and adjust L981 (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 1.3V
±
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 : 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 MAX by L941. Then the level
at 290kHz is adjusted to MAX by TC942.
6. AM IF Adjustment
Settings :
• Test point : TP5 (Lch), TP6 (Rch)
• Adjustment location :
L772 ........................... 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)
: TP5(Lch), TP6(Rch) (Distortion)
• Adjustment location : L771
• Input level : 60dB
µ
V
Method :
Set to FM 98.0MHz and adjust L771 so that the
voltage between TP3 and TP4 is 0V
±
300mV. Next,
check the distortion is less than 1.3 %.
Summary of Contents for XR-DPH2100
Page 12: ... 12 SCHEMATIC DIAGRAM 1 MAIN VM CONN 10P MX NDPH2100 ...
Page 14: ... 14 SCHEMATIC DIAGRAM 2 FRONT MX NDPH2100 ...
Page 16: ... 16 SCHEMATIC DIAGRAM 3 TUNER MX NDPH2100 ...
Page 18: ... 18 SCHEMATIC DIAGRAM 4 AC1 SUB TRANS AC2 MX NDPH2100 ...
Page 20: ... 20 SCHEMATIC DIAGRAM 5 PRO LOGIC MX NDPH2100 ...
Page 22: ... 22 IC BLOCK DIAGRAM MX NDPH2100 IC NJM2152M ...
Page 23: ... 23 ...
Page 30: ... 30 TRANSISTOR ILLUSTRATION GE NDPH2100 E B C RN1410 ...
Page 32: ... 32 SCHEMATIC DIAGRAM MAIN GE NDPH2100 ...
Page 33: ... 33 FL GRID ASSIGNMENT AND ANODE CONNECTION GE NDPH2100 GRID ASSIGNMENT ANODE CONNECTION ...
