– 19 –
1. Tape Speed Adjustment (DECK 1)
Settings : • Test tape : TTA–100
• Test point : TP5 (Lch), TP6 (Rch)
• Adjustment location : SFR391
Method : Play back the test tape and adjust SFR391 so that the
frequency counter reads 3000Hz
±
5Hz (FWD) and
±
45Hz (REV) with respect to forward speed.
2. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape : TTA–330
• Test point : TP5 (Lch), TP6 (Rch)
• Adjustment location : Head azimuth
adjustment screw
Method : Play back (FWD) the 8kHz signal of the test tape
and adjust screw so that the output becomes maximum.
Next, perform on REV PLAY mode.
3. PB Frequency Response Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–330
• Test point :TP5 (Lch), TP6 (Rch)
Method : Play back the 315Hz and 8kHz signals of the test
tape and check that the output ratio of the 8kHz
signal with respect to that of the 315Hz signal is
0dB
±
4dB.
4. REC/PB Frequency Response Check (DECK 1)
Settings : • Test tape : TTA–602
• Test point : TP5 (Lch), TP6 (Rch)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at the TP5,
TP6 becomes 8mV. Record and play back the 1kHz and
8kHz signal and check that the output of the 8kHz
signals is 0dB
±
5dB with respsct to that of the 1kHz
signal.
5. REC/PB Sensitivity Check (DECK 1)
Settings : • Test tape : TTA–602
• Test point : TP5 (Lch), TP6 (Rch)
• Input signal : 1kHz (LINE IN)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP5, TP6
becomes 80mV. Record and play back the 1kHz signals
and check that the output is –2dB
±
3.5dB.
6. PB Sensitivity Check (DECK 1, Deck 2)
Settings : • Test tape : TTA–200
• Test point :TP5 (Lch), TP6 (Rch)
Method : Play back the test tape and check that the output level of
the test point is 110mV
±
3.5dB.
< FRONT SECTION >
1.
µ
-CON OSC Adjustment
Settings : • Test point : TP7 (K-SCAN) and TP8 (GND)
• Adjustment location : L501
Method : Insert AC plug while pressing function key and power
key. Adjust L501 so that the frequency at the test point
is 92.5Hz
±
0.1Hz.
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 531 kHz and check that the
test point is more than 0.6 V.
3. MW Tracking Adjustment
Settings : • Test point : TP5(Lch), TP6(Rch)
• Adjustment location : L951(1/3)
Method : Set to AM 999kHz and adjust L951(1/3) so that the test
point becomes maximum.
4. LW VT Adjustment
Settings: • Test point :TP1 (VT)
• Ajustment location : L942
Method : Set to LW 144kHz and adjust L942 so that the test point
becomes 1.3V
±
0.05 V.
Then set to LW 290kHz and check that the test point is
less than 8.0V.
5. LW Tracking Ajustment
Settings : • Test point :TP5(Lch),TP6(Rch)
• Ajustment 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. 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.
7. 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 13.0dB
µ
V.
Settings : • Test point : TP5(Lch), TP6(Rch)
• Adjustment location :
L802..............................450kHz
7. DC Balance / Mono Distortion Adjustment
Settings : • Test point : TP3, TP4 (DC Balance)
: TP5 (Lch), TP6 (Rch) (Distortion)
• Adjustment location : L801
• Input level : 60dB
Set to FM 98.0MHz and adjust L801 so that the voltage
between TP3 and TP4 becomes 0V
±
0.04V.
Then check that the distortion is less than 1.3%.
< TUNER SECTION >
ADJUSTMENT <TUNER / DECK / FRONT>
< DECK SECTION >
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