Playback Equalization Check; Level Meter Check - Pioneer CT-730 Service Manual

12.2.4 Playback Equalization Check
Settings
AC mV meter
Test tape
Tape selector
Mode
o o
o o
6 . 3 k H z l e v e l - 3 3 3 H 2 l e v e l - + 1 5 + 2 d B
6 . 3 k H z l e v e l - 3 3 3 H 2 l e v e l
2 5
l - - l r o - 3 r 4 A I
g 6 | 33312 20dB I
o o
[-irr".
-zoce
I
Fig. 12-11 Playback equalization check
Procedure
1. Play the 333H2, -2OdB portion and record the
AC mV meter reading.
2. Then play the 6.3kHz, - 20dB portion, and
check that the meter reading lies within +1.5
12dB 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
-2.511dB of the reading obtained in step 3.
Connect to OUTPUT ter-
minals
STD-341A (333H2,
- 20dB) (6.4W12, - 20dB)
NORM
Playback
12.2.5 Level Meter Check
Settings
AC mV meter Connect to TP1 (L ch) and
TP2 (R ch)
Input signal
333H2, - 10dBv (316mV)
to INPUT terminals
Mode
Record
Fig. 12-12 Level meter check
Procedure
Adjust the INPUT level control so that the
meter reads of - 5.2dBv (0.54V), and check that
the level meter segments light up in a 0dBt L seg-
ment range.
lDTape selector .
M E T A L p o s r t t o n
5 . 2 d a v ( 0 . 5 4 V )