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ADJUSTMENT <TUNER/DECK/DISPLAY>
< TUNER SECTION >
1. Clock Frequency Check
Settings : • Test point :
Method : Set to MW 1602kHz and check that the test point is
2052kHz ± 45Hz.
2. MW VT Adjustment
Settings : • Test point :
• Adjustment location: L953
Method : Set to MW 1710kHz and adjust L953 so that the test
point becomes 8.0V ± 0.05V. Then set to MW 530kHz
and check that the test point is more than 0.3V.
3. MW Tracking Adjustment
Settings : • Test point :
• Adjustment location :
L952 ................................................ 603kHz
TC941 ............................................ 1404kHz
Method : Set up TC941 to center before adjustment. The level at
603kHz is adjusted to max. by L952. Then the level at
1404kHz is adjusted to max. by TC941.
4. AM IF Adjustment
Settings : • Test point :
• Adjustment location :
L802 ................................................ 405kHz
5. SW VT Adjustment
Settings : • Test point :
• Adjustment location:
Method : Set to SW 17.9MHz and adjust L942 so that the test
point becomes 8.0V ± 0.2V. Then set to SW 5.73MHz
and check that the test point is more than 0.3V.
6. SW Tracking Adjustment
Settings : • Test point :
• Adjustment location:
L941 ............................................... 5.9MHz
TC942 ........................................... 17.9MHz
Method : Set up TC942 to center before adjustment. The level at
5.9MHz is adjusted to max. by L941. Then the level at
17.9MHz is adjusted to max. by TC942.
7. FM VT Check
Settings : • Test point :
Method : Set to FM 87.5MHz, 108.0MHz and check that the
test point is more than 0.5V (87.5MHz) and less than
8.0V (108.0MHz)
8. FM Tracking Check
Settings : • Test point :
Method : Set to FM 98.0MHz and check that the test pooint is less
than 9dBµV
9. DC Balance / Mono Distortion Adjustment
Settings : • Test point :
• Adjustment location : L801
• Input level :
Method : Set to FM 98.0MHz and adjust L801 so that the
distortion is minimum.Then check the voltage between
TP3 and TP4 is 0V± 0.3V
All manuals and user guides at all-guides.com
TP2 (CLK)
TP1 (VT)
TP8(Lch), TP9(Rch)
TP8(Lch), TP9(Rch)
TP1 (VT)
L942
TP8(Lch), TP9(Rch)
TP1 (VT)
TP8(Lch), TP9(Rch)
TP3, TP4 (DC Balance)
TP8(Lch), TP9(Rch)
(Distortion)
60dBµV
– 40 –
< DECK SECTION >
10. Tape Speed Adjustment
Settings : • Test tape :
• Test point :
• Adjustment location : SFR1
Method : Play back the test tape and adjust SFR1 so that the
frequency counter reads 3000Hz ± 5Hz(FWD) and ±
45Hz(REV) with respect to forward speed.
11. Head Azimuth Adjustment
Settings : • Test tape :
• Test point :
• Adjustment location : Head azimuth
Method : Play back the 10kHz signal of the test tape and adjust
screw so that the output becomes maximum. Next,
perform on each FWD PLAY and REV PLAY mode.
12. PB Frequency Response Check (DECK 1, DECK 2)
Settings : • Test tape :
• Test point :
Method : Play back the 315Hz and 10kHz signals of the test tape
and check that the output ratio of the 10kHz signal with
respect to that of the 315Hz signal is within 0 ± 2dB.
13. PB Sensitivity Adjustment (DECK 1, DECK 2)
Settings : • Test tape :
• Test point :
• Adjustment location : SFR301 (DECK 1, Lch)
Method : Play back the test tape and adjust SFRs so that the
output level of the test points become 245mV±10mV.
14. REC/PB Frequency Response Adjustment (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
• Adjustment location : SFR351 (Lch)
Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the test points
becomes 12.5mV. Record and play back the 1kHz and
10kHz signals and adjust SFRs so that the output level
of the 10kHz signals becomes 0dB ± 0.5dB with respect
to that of the 1kHz signal.
15. REC/PB Frequency response Check (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the test points
becomes 12.5mV. Record and play back the 1kHz and
10kHz signals and check that the output is 0dB ± 2dB.
TTA–100(3kHz)
TP10(Rch), TP11(Lch)
TTA–300 (315/10kHz)
TP10(Rch), TP11(Lch)
adjustment screw
TTA–300 (315/10kHz)
TP10(Rch), TP11(Lch)
TTA–200 (400Hz)
TP10(Rch), TP11(Lch)
SFR302 (DECK 1, Rch)
SFR303 (DECK 2, Lch)
SFR304 (DECK 2, Rch)
TTA–602 (Normal)
TP10(Rch), TP11(Lch)
1kHz / 10kHz (LINE IN)
SFR352 (Rch)
TTA-615 (CrO
)
2
TP10(Rch), TP11(Lch)
1kHz/10kHz (LINE IN)
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