Table of Contents
Advertisement
< TUNER SECTION >
1. Clock frequency Check
Settings : • Test point : TP2 (CLK)
Method : Set to AM 1602kHz and check that the test point is
2052kHz ± 45Hz.
2. AM VT Check
Settings : • Test point : TP1 (VT)
Method : Set to AM 1602kHz, 531kHz and check that the test
point is less than 8.0V (1602kHz) and more than
0.6V (531kHz).
3. FM VT Check
Settings : • Test point : TP1 (VT)
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).
4. AM Tracking Adjustment
Settings : • Test point : TP5(Lch), TP6(Rch)
• Adjustment location :
L951(1/3) ........................................ 999kHz
Method : Set to AM 999kHz and adjust L951(1/3) to MAX.
5. 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 9dBµV.
6. AM IF Adjustment
Settings : • Test point : TP5(Lch), TP6(Rch)
• Adjustment location :
L802 ................................................ 450kHz
7. DC Balance / Mono Distortion Adjustment
Settings : • Test point : TP3, TP4 (DC balance)
• Test point : TP5(Lch), TP6(Rch)
• Adjustment location : L801
• Input level : 60dBµV
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 ± 300mV.
All manuals and user guides at all-guides.com
< DECK SECTION >
8. Tape Speed Adjustment (DECK 2)
9. Head Azimuth Adjustment (DECK 1, DECK 2)
10. PB Frequency Response Check (DECK 1, DECK 2)
11. PB Sensitivity Check (DECK 1, DECK 2)
12. REC/PB Frequency Response Adjustment (DECK 2)
13. REC/PB Sensitivity Check (DECK 2)
< MICON SECTION >
14. µ-CON OSC Adjustment
– 32 –
Settings : • Test tape : TTA–100
• Test point : TP5(Lch), TP6(Rch)
• Adjustment location : SFR1
Method : Play back the test tape and adjust SFR1 so that the
frequency counter reads 3000Hz ± 5Hz and ± 45Hz
(REV) with respect to forward speed.
Settings : • Test tape : TTA–330
• Test point : TP5(Lch), TP6(Rch)
• Adjustment location : Head azimuth
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.
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
within 5dB.
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 230mV ± 3dB.
Settings : • Test tape : TTA–602
• Test point : TP5(Lch), TP6(Rch)
• Input signal : 1kHz / 8kHz (LINE IN)
• Adjustment location : SFR351 (Lch)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at the TP5,
TP6 becomes -20VU. Record and play back the
1kHz and 8kHz signals and adjust SFRs so that the
output of the 8kHz signals becomes 0dB ± 0.5dB
with respect to that of the 1kHz signal.
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 0VU. Record and play back the 1kHz
signals and check that the output is 0dB ± 3.5dB.
Settings : • Test point : TP7 (O-KSCAN), TP8 (GND)
• Adjustment location : L101
Method : Insert AC plug while pressing TUNER function key.
Adjust L101 so that the frequency at the test point is
208.80Hz ± 0.21Hz.
adjustment screw
SFR352 (Rch)
Advertisement
Table of Contents
