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6. Adjusting the FL Meter
After adjusting the playback level, playback the test tape
(A-BEX TCC-130) and adjust RT401 (L ch), RT402 (R
ch) so that the FL meter indicates OdB when the LINE
OUT terminal level is OdB (0.775V).
7. Adjusting the Recording Section
(1) Adjusting
the
record/play back
overall
frequency
response.
1)
Load the test tape HD7E/C60; record a signal with
an input level of—38 dB, 1 KHz at the LINE IN
terminal; play back this recording.
2)
Change the frequency of the input signal to
12kHz, record and playback; adjust RT104(Lch),
RT204 (R ch) so that the characteristic standards
meet the following diagram when compared to the
1kHz signal output level.
Record/Playback Overall Frequency Response
Tape: H07E
Dolby: off
Level: —20dB from Dolby.
(16)
(2) Adjusting the record/pi ay back levels
1)
Load the test tape HD7E/C-60 and record a signal
of 1kHz (-38 dB).
2)
Adjust RT102 (L ch), RT202 (R ch) so that the
output level is the same when the MONITOR
switch
is switched
from SOURCE to TAPE
position.
(3) Checking the Dolby C record/playback overall fre¬
quency response
1)
Set the DOLBY NR switch to the "C" position.
2)
Using the test tapes DXM, HD7E/C-60.DX3H, per¬
form record/playback in the same manner as 7-(1).
3)
Check to make sure that the record/playback
overall frequency response meets the specifications
in the diagram.
Dolby C Record/Playback Overall Frequency Response.
Tape: HD7E
Dolby: on, C
Level: — 20dB from Dolby
OOLBY-C
m
RE CORO/PLAY BACK
• Beat Interference
Beat interference may result if the unit is used close to an
AM tuner.
In this case separate the distance between the
tuner and the cassette deck.
(17)
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