< TUNER SECTION >
1. Clock Frequency Check9. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : Y Test point :TP2 (CLK)Settings : Y Test tape :TTA�300 (315/10kHz)
Method : Set to AM 1710kHz and check that the testY Test point :TP10(Lch), TP11(Rch)
point is 2160kHz ? 45Hz.Y Adjustment location : Head azimuth
adjustment screw
2. AM VT CheckMethod : Play back the 10kHz signal of the test tape
Settings : Y Test point :TP1 (VT)and adjust screw so that the output becomes
Method : Set to AM 1710kHz and AM 530kHzmaximum. Next, perform on each FWD PLAY
and check that the test point is lessand REV PLAY mode.
than 8.5V(1710kHz) and more than
0.6V(530kHz)10. PB Frequency Response Check (DECK 1, DECK 2)
Settings : Y Test tape :TTA�300 (315/10kHz)
3. AM Tracking AdjustmentY Test point :TP10(Lch), TP11(Rch)
Settings : Y Test point : TP8(Lch), TP9(Rch)Method : Play back the 315Hz and 10kHz signals of the
Y Adjustment location :test tape and check that the output ratio of the
L951(1/3)........................ 999kHz10kHz signal with respect to that of the 315Hz
Method : Set to AM 999kHz and adjustsignal is within 0 ? 3dB.
L951(1/3) so that the test point is max.
11. REC/PB Frequency Response Adjustment (DECK 2)
4. FM VT CheckSettings : Y Test tape :TTA�602 (Normal)
Settings : Y Test point :TP1 (VT)Y Test point :TP10(Lch), TP11(Rch)
Method : Set to FM 108.0MHz and check that the testY Input signal : 1kHz / 10kHz (LINE IN)
point is less than 8.0V.Y Adjustment location :
Set to FM 87.5MHz and check that the testSFR351 (Lch)
point is more than 0.5V.SFR352 (Rch)
Method : Apply a 1kHz signal and REC mode. Then adjust
5. FM Tracking CheckOSC attenuator so that the output level at the test
Settings : Y Test point :TP8(Lch), TP9(Rch)points becomes 9.0mV. Record and play back the
Method : Set to FM 98.0MHz and check that the test1kHz and 10kHz signals and adjust SFRs so that
point is less than 9.0dB?V.the output level of the 10kHz signals becomes
0dB ? 0.5dB with respect to that of the 1kHz
6. AM IF Adjustmentsignal.
Settings : Y Test point :TP8(Lch), TP9(Rch)
Y Adjustment location : L80212. REC/PB Frequency response Check (DECK 2)
Y Input level :VariableSettings : Y Test tape :TTA-615 (CrO)
2
Method : Adjust L802 so that the output becomes max.Y Test point :TP10(Lch), TP11(Rch)
Y Input signal : 1kHz/10kHz (LINE IN)
7. DC Balance / Mono Distortion AdjustmentMethod : Apply a 1kHz signal and REC mode. Then
Settings : Y Test point :TP3, TP4Adjust OSC attenuator so that the output level
(DC Balance)at the test points becomes 9.0mV. Record and
TP8(Lch), TP9(Rch)play back the 1kHz and 10kHz signals and
(Distortion)check that the output is 0dB ? 2dB.
Y Adjustment location : L801
Y Input level :60dB?V13. REC/PB Sensitivity Check (DECK 2)
Method : Set to FM 98.0MHz and adjust L801 so that theSettings : Y Test tape :TTA-615 (CrO2)
voltage between TP3 and TP4 becomes 0V ? 0.3V.Y Test point :TP10(Lch), TP11(Rch)
Next, check that the distortion is minimum.Y Input signal : 1kHz (LINE IN)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at the test
< DECK SECTION >points becomes 90mV. Record and play back the
1kHz signal and check that the output is -1dB ?
8. Tape Speed Adjustment (DECK 2)3dB.
Settings : Y Test tape :TTA�100(3kHz)
Y Test point :TP10(Lch), TP11(Rch)14. ?-CON OSC Adjustment
Y Adjustment location : SFR1Settings : Y Test point :TP5(K-SCAN)
Method : Play back the test tape and adjust SFR1 so thatY Adjustment location : L101
the frequency counter reads 3000Hz ? 5Hz(FWD) and ?Method : Insert AC plug with pressing TUNER function
45Hz(REV) with respect to forward speed.key. Adjust L101 so that the frequency across the
test point is 208.8Hz ? 0.2Hz.
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ACEC
AIWA
