– 16 –
ADJUSTMENT – 2 <DECK>
< DECK SECTION >
1. 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
test point becomes 3000Hz
±
5Hz (FWD) and FWD
SPEED
±
45Hz (REV) with respect to forward speed.
2. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape :
TTA–330
• Test point :
TP8 (Lch), TP9 (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 :
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
0dB
±
5dB.
4. 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 140mV
±
3dB.
5. REC/PB Frequency Response Adjustment (DECK 1)
Settings : • Test tape :
TTA–602
• Test point :
TP8 (Lch), TP9 (Rch)
• Input signal :
1kHz / 8kHz
(–20VU)
• Adjustment location : SFR451 (Lch)
SFR452 (Rch)
Method :
Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the TP8, TP9
becomes 0 dB (10mV). Record and play back the
1kHz and 8kHz signals and adjust SFRs so that the
output of the 10kHz signals becomes 0dB
±
1dB with
respect to that of the 1kHz signal.
6. REC/PB Sensitivity Check (DECK 1)
Settings : • Test tape :
TTA–602
• Test point :
TP8 (Lch), TP9 (Rch)
• Input signal :
1kHz (0VU)
Method :
Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP8, TP9
becomes 0 dB (100mV). Record and play back
the 1kHz signals and check that the output is
–1dB
±
3.5dB.
All manuals and user guides at all-guides.com
all-guides.com
Summary of Contents for Z-L120
Page 8: ...8 SCHEMATIC DIAGRAM 1 MAIN 1 2 All manuals and user guides at all guides com...
Page 9: ...9 SCHEMATIC DIAGRAM 2 MAIN 2 2 TUNER All manuals and user guides at all guides com...
Page 13: ...13 SCHEMATIC DIAGRAM 4 PT All manuals and user guides at all guides com...
Page 14: ...14 IC BLOCK DIAGRAM All manuals and user guides at all guides com...
Page 17: ...17 MECHANICAL EXPLODED VIEW 1 1 All manuals and user guides at all guides com...
