Marantz 5010 - Page 22

20
20. Erasing Effect Measurement
SET UP
1. Power voltage:- 50 or GOHzAC voltage rated
for the unit to be used in a market country.
2. Input:- 100Hz, —60qB signal with +10dB as
OVU.
3. Playback output level:- Same as the recorded
signal level.
4. Load:- Measuring instrument input im-
pedance.
5. TAPE selector switch position:- NORMAL,
CrO, and Fe-Cr.
6. Cassette tape used:- TDK AC-211, AC-511
and SONY CS&-30.
7. Filter used:- 100Hz band-pass filter.
PROCEDURES
1. Record the 100Hz input signal in the normal
recording state.
2. In turn, increase the input level by 10dB
with the attenuator, and record it.
3. Rewind a half portion of the 10dB-up tape
and record in no-signal state, or erase, on the
portion with the input signal disconnected
from the microphone jack.
4, Play back in the normal playback state the
input signal recorded in the normal record-
ing state.
5. tn turn, let the 10dB-up recorded signal level
be OdB as reference level. Read difference of
the level at the erased portion from the 0dB
reference level.
Mode: record
100Hz
af: 08C Blank Tape
Cy The, ator
ai ie
e aoe 3)
Mode: record
Halt of recorded
Portion
Mode: playback
vive
R
Batre 100 Hz venavoss
filter
Pek
Line Out
STANDARD
Greater than 55dB.
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21. Leak Bias Measurement
SET UP
1. Power voltage:- 50 or 6OHz AC voltage rated
for the unit to be used in a market country.
2. Input:- 1kHz, —60dB signal.
3. Load:- Measuring instrument input im-
pedance.
4. Level contro} position:- SRL.
5. TAPE selector switch position:- NORMAL,
CrO, and Fe-Cr.
PROCEDURES
1. Record the 1kHz input signal in the normal
recording state. Let the monitor output Jevel
at the LINE OUT terminal be OdB as
reference level. Read difference of the out-
put level having the input signal discon-
nected from the OdB reference levei.
2. Proceed both for the right and left channels
in the same manner.
Mode: record
= pa
,
at OSC
Line Out
Mi
STANDARD
Lower than —45dB.