< TUNER SECTION >< DECK SECTION >
1. Clock frequency Check10. Tape Speed Adjustment (DECK 1)
Settings : Y Test point : TP2 (CLK)Settings : Y Test tape : TTA�100
Method : Set to MW 1602kHz and check that the test point isY Test point : TP8(Lch), TP9(Rch)
2052kHz ? 0.045kHz.Y Adjustment location : SFR701
Method : Play back the test tape and adjust SFR701 so that the
2. MW VT Checkfrequency counter reads 3000Hz ? 5Hz.
Settings : Y Test point : TP1 (VT)
Method : Set to MW 1602kHz and check that the test point is less11. Head Azimuth Adjustment (DECK 1, DECK 2)
than 8.0V ? 0.05V. Then set to 531kHz and check thatSettings : Y Test tape : TTA�330
the test point is more than 0.3V.Y Test point : TP8(Lch), TP9(Rch)
Y Adjustment location : Head azimuth
3. FM VT Checkadjustment screw
Settings : Y Test point : TP1 (VT)Method : Play back (FWD) the 8kHz signal of the test tape and
Method : Set to FM 87.5MHz, 108.0MHz and check that the testadjust screw so that the output becomes maximum.
point is more than 0.5V (87.5MHz) and less than 8.0VNext, perform on REV PLAY mode.
(108.0MHz).
12. PB Frequency Response Check (DECK 1, DECK 2)
4. MW Tracking AdjustmentSettings : Y Test tape : TTA�330
Settings : Y Test point : TP8(Lch), TP9(Rch)Y Test point :TP8(Lch), TP9(Rch)
Y Adjustment location :Method : Play back the 315Hz and 8kHz signals of the test tape
L952 ............................................................... 603kHzand check that the output ratio of the 8kHz signal with
TC941 ............................................................ 1404kHzrespect to that of the 315Hz signal is within 4dB.
Method : Set up TC941 to center before adjustment. The output
level at 603KHz is adjusted to MAX by L952. Then the13. PB Sensitivity Check (DECK 1, DECK 2)
output level at 1404KHz is adjusted to MAX by TC941.Settings : Y Test tape : TTA�200
Y Test point : TP8(Lch), TP9(Rch)
5. FM Tracking CheckMethod : Play back the test tape and check that the output level of
Settings : Y Test point : TP8(Lch), TP9(Rch)the test point is 110mV ? 3.5dB.
Method : Set to FM 98.0MHz and check that the test point is less
than 9dB?V.14. REC/PB Frequency Response Check (DECK 1)
Settings : Y Test tape : TTA�602
6. AM IF AdjustmentY Test point : TP8(Lch), TP9(Rch)
Settings : Y Test point : TP8(Lch), TP9(Rch)Y Input signal : 1kHz / 8kHz (LINE IN)
Y Adjustment location :Method : Apply a 1kHz signal and REC mode. Then adjust OSC
L802 ............................................................ 450kHzattenuator so that the output level at the test points
becomes -20VU. Record and play back the 1kHz and
7. SW VT Adjustment8kHz signals and check that the output of the 8kHz
Settings : Y Test point : TP1(VT)signals is 0dB ? 5dB with respect to that of the 1kHz
Y Adjustment location : L942signal.
Method : Set to SW 17.9MHz and adjust L942 so that the test
point becomes 8.0V ? 0.05V.15. REC/PB Sensitivity Check (DECK 1)
Then set to SW 5.73MHz and check that the test point isSettings : Y Test tape : TTA�602
more than 0.3V.Y Test point : TP8(Lch), TP9(Rch)
Y Input signal : 1kHz (LINE IN)
8. SW Tracking AdjustmentMethod : Apply a 1kHz signal and REC mode. Then adjust OSC
Settings : Y Test point : TP8(Lch), TP9(Rch)attenuator so that the output level at TP8, TP9 becomes
Y Adjustment location :0VU. Record and play back the 1kHz signals and check
L941 ............................................................ 5.73MHzthat the output is -2dB ? 3.5dB.
TC943 .......................................................... 17.9MHz
Method : Set up TC943 to center before adjustment. The level at< FRONT SECTION >
5.73MHz is adjusted to MAX by L941. Then the level at
17.9MHz is adjusted to MAX by TC943.16. u-CON OSC Adjustment
Settings : Y Test point : TP5(K-SCAN) / GND
9. DC Balance / Mono Distortion AdjustmentY Adjustment location : L101
Settings : Y Test point : TP3, TP4 (DC Balance)Method : Insert AC plug with pressing of TUNER function key
Y Adjustment location : L801and POWER key. Adjust L101 so that the frequency
Y Input level : 60dB?Vacross the test point is 58.350Hz ? 0.02Hz.
Method : Set to FM 98.0MHz and adjust L801 so that the voltage
between TP3 and TP4 becomes 0V ? 300 mV with
minimum distortion.
� 27 � |
ACEC
AIWA
