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12.2.4 Playback Equalization Check
Settings
AC mV meter
Test tape
Tape selector . .
Mode
Connect to OUTPUT ter-
minals
STD-341A (333H2,
- 20dB) (6.4kH2, - 20dB)
NORM
Playback
12.2.5 Level Meter Check
Settings
AC mV meter
. . Connect to DOL L (L ch)
and DOL R (R ch)
I n p u t s i g n a l
. . . 3 3 3 H 2 , - 1 0 d B v ( 3 1 6 m V )
to INPUT terminals
M o d e
. . . R e c o r d
Fig. 12-11 Level meter check
Procedure
Adjust the INPUT
level control
so that the
meter reads - 5.2dBv (0.54V), and check that
the level meter segments light up in a OdBt 1 seg-
ment range.
f ""*^
JJ
t s r m
- l
O @ l r r . - z m e I
oolT;-,ml
@ @
o 0
6effi
6 M
Fig. 12-10 Playback equalization
check
Procedure
1. Play the 333H2, - 20dB portion and record the
AC mV meter reading.
2. Then play the 6.3kHz, -2OdB portion, and
check that the meter reading lies within +1.5
t2dB of the reading obtained in step 1 above.
3. Switch the tape selector to METAL, play the
333H2, -20d8 portion again, and record the
meter reading.
4. Then play the 6.3kHz, -20dB portion again,
and check that the meter reading lies within
-2.5t1dB
of the reading obtained in step 3.
D O L L ( L c h )
D O L R ( R c h l
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