B FRONT C.B18
FL901
D981D984
<HA><HR>
TP11
1
IC901
GND
L951+
< CR NETWORK FILTER >
C913
301SS133
10?F10?F1k&
TP11
(KEY-SCAN)TO
FREQUENCY
1k&0.1?F 47k&
COUNTER
(GND)
D DECK C.B<HA>D DECK C.B<HR>
SFR1SFR1
12
12
DECK �1 P HEAD<HR>
DECK �1 P HEAD<HA>
DECK �2 R/P/E HEAD
FWDREV
FWDREV
1313
13 13
< DECK SECTION >
12. Tape Speed Adjustment (DECK 2)16. REC/PB Frequency Response Adjustment (DECK 2)
Settings : Y Test tape : TTA�100Settings : Y Test tape : TTA�602
Y Test point : TP8(Lch), TP9(Rch)Y Test point : TP8(Lch), TP9(Rch)
Y Adjustment location : SFR1Y Input signal : 1kHz / 8kHz (LINE IN)
Method : Play back the test tape and adjust SFR1 so that theY Adjustment location : SFR451 (Lch)
frequency counter reads 3000Hz ? 5Hz (FWD) andSFR452 (Rch)
FWD SPEED ? 45Hz (REV).Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the TP8, TP9
13. Head Azimuth Adjustment (DECK 1, DECK 2)becomes -20VU (-26dBV). Record and play back the
Settings : Y Test tape : TTA�3301kHz and 8kHz signals and adjust SFRs so that the
Y Test point : TP8(Lch), TP9(Rch)output of the 8kHz signals becomes 1.5dB ? 0.5dB with
Y Adjustment location : Azimuth adjustment screwrespect to that of the 1kHz signal.
Method : Play back (FWD) the 8kHz signal of the test tape and
adjust screw so that the output becomes maximum.17. REC/PB Sensitivity Check (DECK 2)
Next, perform on REV PLAY mode.Settings : Y Test tape : TTA�602
Y Test point : TP8(Lch), TP9(Rch)
14. PB Frequency Response Check (DECK 1, DECK 2)Y Input signal : 1kHz (LINE IN)
Settings : Y Test tape : TTA�330Method : Apply a 1kHz signal and REC mode. Then adjust OSC
Y Test point :TP8(Lch), TP9(Rch)attenuator so that the output level at TP8, TP9 becomes
Method : Play back the 315Hz and 8kHz signals of the test tape0VU (-6dBV). Record and play back the 1kHz signals
and check that the output ratio of the 8kHz signal withand check that the output is -1dB ? 3.5dB.
respect to that of the 315Hz signal is within 5.0dB.
< FRONT SECTION >
15. PB Sensitivity Check (DECK 1, DECK 2)
Settings : Y Test tape : TTA�200
18.?-con OSC Adjustment
Y Test point : TP8(Lch), TP9(Rch)
Settings : Y Test point : TP11(KEY-SCAN), GND
Method : Play back the test tape and check that the output level of
Y Adjustment location : L951
the test point is 110mV ? 3.0dB.
Method : Connect a frequency counter across TP11 and GND via
a CR network filter. Then adjust L951 so that the test
point becomes 184.94Hz ? 0.18Hz.
� 21 � |
ACEC
AIWA
