< TUNER SECTION >< DECK SECTION >
1. Clock frequency Check10. Tape Speed Adjustment (DECK 2)
Settings : Y Test point : TP2Settings : Y Test tape : TTA�100
Method : Set to WM 1602kHz and check that the test point isY Test point : TP8(Lch), TP9(Rch)
2052kHz ? 45Hz.Y Adjustment location : SFR1
Method : Play back the test tape and adjust SFR1 so that the
2. MW VT Adjustmentfrequency counter reads 3000Hz ? 5Hz and ?45Hz
Settings : Y Test point : TP1 (VT)(REV) with respect to forward speed.
Y Adjustment location : L953
Method : Set to MW 1710kHz, 530kHz and adjust L953 so11. Head Azimuth Adjustment (DECK 1, DECK 2)
that the test point is less than 8.5V (1710kHz) andSettings : Y Test tape : TTA�330
more than 0.6V (530kHz).Y Test point : TP8(Lch), TP9(Rch)
Y Adjustment location : Head azimuth
3. SW VT Adjustment adjustment screw
Settings : Y Test point : TP1 (VT)Method : Play back (FWD) the 8kHz signal of the test tape
Y Adjustment location : L942and adjust screw so that the output becomes
Method : Set to SW 17.9MHz, 5.73MHz and adjust L942 somaximum. Next, perform on REV PLAY mode.
that the test point is 8.0V ? 0.05V (17.9MHz) and
more than 0.3V (5.9MHz).12. PB Frequency Response Check (DECK 1, DECK 2)
Settings : Y Test tape : TTA�300
4. FM VT CheckY Test point :TP8(Lch), TP9(Rch)
Settings : Y Test point : TP1 (VT)Method : Play back the 315Hz and 8kHz signals of the test
Method : Set to FM 87.5MHz, 108.0MHz and check that thetape and check that the output ratio of the 8kHz
test point is more than 0.5V (87.5MHz) and lesssignal with respect to that of the 315Hz signal is
than 8.0V (108.0MHz).within 5dB.
5. MW Tracking Adjustment13. PB Sensitivity Check (DECK 1, DECK 2)
Settings : Y Test point : TP8(Lch), TP9(Rch)Settings : Y Test tape : TTA�200
Y Adjustment location :Y Test point : TP8(Lch), TP9(Rch)
L952 ...................................... 603kHzMethod : Play back the test tape and check that the output
TC941 ...................................1404khzlevel of the test point is 140mV ? 3dB.
Method : Set to MW 603kHz and adjust L952 so that the
level at the test point becomes maximum.14. REC/PB Frequency Response Adjustment (DECK 2)
Next, set to MW 1404kHz and adjust TC941 soSettings : Y Test tape : TTA�602
that the level at the test point becomes maximum.Y Test point : TP8(Lch), TP9(Rch)
Y Input signal : 1kHz / 8kHz (LINE IN)
6. SW Tracking AdjustmentY Adjustment location : SFR451 (Lch)
Settings : Y Test point : TP8(Lch), TP9(Rch)SFR452 (Rch)
Y Adjustment location :Method : Apply a 1kHz signal and REC mode. Then adjust
L941 ...................................... 5.9MHzOSC attenuator so that the output level at the TP8,
TC943 ...................................17.9MhzTP9 becomes -20VU. Record and play back the
Method : Set to SW 5.9MHz and adjust L941 so that the level1kHz and 8kHz signals and adjust SFRs so that the
at the test point becomes maximum.output of the 8kHz signals becomes 0dB ? 0.5dB
Next, set to SW 17.9MHz and adjust TC943 so thatwith respect to that of the 1kHz signal.
the level at the test point becomes maximum.
15. REC/PB Sensitivity Check (DECK 2)
7. FM Tracking CheckSettings : Y Test tape : TTA�602
Settings : Y Test point : TP8(Lch), TP9(Rch)Y Test point : TP8(Lch), TP9(Rch)
Method : Set to FM 98.0MHz and check that the test point isY Input signal : 1kHz (LINE IN)
less than 9dB?V.Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP8, TP9
8. AM IF Adjustmentbecomes 0VU. Record and play back the 1kHz
Settings : Y Test point : TP8(Lch), TP9(Rch)signals and check that the output is �2dB ? 3.0dB.
Y Adjustment location :
L802 ............................................. 999kHz< FRONT SECTION >
16. ?-CON OSC Adjustment
9. DC Balance / Mono Distortion AdjustmentSettings : Y Test point : TP7 and GND
Settings : Y Test point : TP3, TP4 (DC Balance)Y Adjustment location : L331
: TP8(Lch), TP9(Rch) (Distortion)Method : Insert AC plug while pressing POWER and TUNER
Y Adjustment location : L801function keys. Adjust L331 so that the frequency at
Y Input level : 60dB?Vthe test point is 153.84Hz ? 0.15Hz.
Method : Set to FM 98.0MHz and adjust L801 so that the
voltage between TP3 and TP4 becomes 0V ? 0.3V.
Next, check that the distortion is less than 1.3%.
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ACEC
