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12-25.
Input & Output Level Checks of
REC/P.B.
Connector
Connection:
As shown
in Fig. 12-34.
Switch Setting:
MONITOR switch ......... TAPE
VR Setting:
MIC VOLUME .............. indicated on page 25
(4)
Procedures:
(1)
Deliver a { kHz signal of -33 dB(17.5 mV)
to terminal
No. @
(L-CH) or @
(R-CH) of
the rec./p.b. connector shown
in Fig. 12-35.
AF
osc
REC Amp.
80k2
tape, blank
rec./p.b. connector
(terminal no.@),@®)
1 kHz
-33 dB
rec./p.b. connector
(terminal no. @),®)
Fig. 12-34
Input & output checks setup of REC/P.B.
connector
— 39 -—
(2) Place the machine
in record mode.
(3) Be
sure
that
the
reading
on
the
VIVM
connected
to the terminal No. @) (L-CH)
or () (R-CH) of the rec./p.b. connector is
-S~-] dB (0.44~0.7 V).
Set
the
MIC
VOLUME
to
the maximum
position
and
adjust
the signal level of the
audio oscillator to obtain OdB (0.775V) on
the VTVM
and be sure that the signal level
on
the audio
oscillator is less than -40 dB
(7.7 mV).
REC/P.B.
CONNECTOR
oe
R (4)
a
(2)
.
:
~ " output side
input side
ground
REC/P.B.
connector
(back view)
Fig. 12-35
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