JVC DR-E34BK Service Manual page 27

1) Add a 1 kHz (-8 dbs) input to the
AUX terminal and record on the
left and right channels using
normal tape.
2) When playing this back, adjust the
recording signal current so that
output among W022(L), W021(E)
of TPOO1 and W020(R), W021(E) of
TPOO1 is -5.Sdbs.
Recording/ Record a 1 kHz(-8 dbs) AUX input
playback signal.
distortion 2) Play this back and check the out-
check put with a distortion meter to
make sure it is the rated value.
Recording/
playback
SIN ratio
check
Record 1 kHz (-8dB) AUX output
signal, While recording, remove
the input and record without a
signal.
2) Play this back and use an
electronic voltmeter to compare
the 0 dB recording output and the
out-put of the recording without a
signal to make sure this is the
rated values
Erase ratio
check
Record a 1 kHz(0 dB) AUX input
signal.
Rewind and erase part of the
recorded section.
Compare the outputs of the
recorded and erased sections using
an electronic voltmeter.
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PB LEVEL
ADJ.
TPOO2
Adjustment Method
DR-E34BK
DR-E34LBK
Adjustment | Standard
Location Value
R367(L) Adjust with normal tape and make
sure that the level difference is 1.5 dB
or less with CrO2tape and that the
left/right level difference is 1.0 dB or
less.
a: or less |Perform after the bias current and
with recording level adjustments.
normal
tape or
CrO2 tape.
45 dB or
more with
normal
tape or
CrO2 tape
60 dB or
more
Connect a 1 kHz band-pass filter
between the deck and electronic
Voltmeter When making the
adjustment.
1kHz 0dB Deck record /
Input erase
Electronice
voltmeter
Band-pass
filter
REC LEVEL
AOI.
R367 R368
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(No. 20162) 1-27