Aiwa Z-L100 Service Manual page 23

B FRONT C.B
< 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
adjustment screw
Method : Play back (FWD) the 8kHz signal of the test tape
and adjust screw so that the output becomes
maximum.
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 5dB.
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 140mV ± 3dB.
16
TP7
(K-SCAN)
D-GND
L101
FL201
IC101
SFR701
10
DECK–1 R/P/E, DECK-2 P HEAD
11
14. REC/PB Frequency Response Adjustment (DECK 1)
Settings : • Test tape : TTA–602
• Test point : TP8 (Lch), TP9 (Rch)
• Input signal : 1kHz / 8kHz (LINE IN)
• Adjustment location : SFR451 (Lch)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at the TP8,
TP9 becomes -20VU (9~11mV). 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.
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 (90~110mV). Record and play back the
1kHz signals and check that the output is 0dB ± 3.0dB.
< FRONT SECTION >
16. MICON OSC Adjustment
Settings : • Test point : TP7 (K-SCAN) and D-GND
• Adjustment location : L101
Method : Pull out AC plug, then insert AC plug again with
pressing of TUNER function key and POWER key.
Adjust L101 so that the frequency across the test point is
58.3525Hz ± 0.058Hz or 17.1372ms ± 0.017ms.
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11
SFR452 (Rch)