Table of Contents
Advertisement
< TUNER SECTION >
1. Clock frequency Check
Settings : • Test point : TP2 (CLK)
Method : Set to MW 1602kHz and check that the test point is
2052kHz ± 0.045kHz.
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 ± 0.05V. Then set to 531kHz and check that
the test point is more than 0.3V.
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. MW Tracking Adjustment
Settings : • Test point : TP8(Lch), TP9(Rch)
• Adjustment location :
L952 ............................................................... 603kHz
TC941 ............................................................ 1404kHz
Method : Set up TC941 to center before adjustment. The output
level at 603KHz is adjusted to MAX by L952. Then the
output level at 1404KHz is adjusted to MAX by TC941.
5. FM Tracking Check
Settings : • Test point : TP8(Lch), TP9(Rch)
Method : Set to FM 98.0MHz and check that the test point is less
than 9dBµV.
6. AM IF Adjustment
Settings : • Test point : TP8(Lch), TP9(Rch)
• Adjustment location :
L802 ............................................................ 450kHz
7. SW VT Adjustment
Settings : • Test point : TP1(VT)
• Adjustment location : L942
Method : Set to SW 17.9MHz and adjust L942 so that the test
point becomes 8.0V ± 0.05V.
Then set to SW 5.73MHz and check that the test point is
more than 0.3V.
8. SW Tracking Adjustment
Settings : • Test point : TP8(Lch), TP9(Rch)
• Adjustment location :
L941 ............................................................ 5.73MHz
TC943 .......................................................... 17.9MHz
Method : Set up TC943 to center before adjustment. The level at
5.73MHz is adjusted to MAX by L941. Then the level at
17.9MHz is adjusted to MAX by TC943.
9. DC Balance / Mono Distortion Adjustment
Settings : • Test point : TP3, TP4 (DC Balance)
• Adjustment location : L801
• Input level : 60dBµV
Method : Set to FM 98.0MHz and adjust L801 so that the voltage
between TP3 and TP4 becomes 0V ± 300 mV with
minimum distortion.
< DECK SECTION >
10. Tape Speed Adjustment (DECK 1)
Settings : • Test tape : TTA–100
• Test point : TP8(Lch), TP9(Rch)
• Adjustment location : SFR701
Method : Play back the test tape and adjust SFR701 so that the
frequency counter reads 3000Hz ± 5Hz.
11. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape : TTA–330
• Test point : TP8(Lch), TP9(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.
12. PB Frequency Response Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–330
• Test point :TP8(Lch), TP9(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 4dB.
13. PB Sensitivity Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–200
• Test point : TP8(Lch), TP9(Rch)
Method : Play back the test tape and check that the output level of
the test point is 110mV ± 3.5dB.
14. REC/PB Frequency Response Check (DECK 1)
Settings : • Test tape : TTA–602
• Test point : TP8(Lch), TP9(Rch)
• Input signal : 1kHz / 8kHz (LINE IN)
Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the test points
becomes -20VU. Record and play back the 1kHz and
8kHz signals and check that the output of the 8kHz
signals is 0dB ± 5dB with respect to that of the 1kHz
signal.
15. REC/PB Sensitivity Check (DECK 1)
Settings : • Test tape : TTA–602
• Test point : TP8(Lch), TP9(Rch)
• Input signal : 1kHz (LINE IN)
Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at TP8, TP9 becomes
0VU. Record and play back the 1kHz signals and check
that the output is -2dB ± 3.5dB.
< FRONT SECTION >
16. u-CON OSC Adjustment
Settings : • Test point : TP5(K-SCAN) / GND
• Adjustment location : L101
Method : Insert AC plug with pressing of TUNER function key
and POWER key. Adjust L101 so that the frequency
across the test point is 58.350Hz ± 0.02Hz.
27
–
–
adjustment screw
Advertisement
Table of Contents
