Marantz 5010 - Page 15

8. Reocrd-Playback Frequency Response Ad-
justment
SET UP
1. Power voltage:- 50 or 60Hz AC voltage
rated for the unit to be used in a market
country.
2. Input signal:- 1kHz, —60dB with —20dB
referenced as OVU.
3. TAPE selector switch:- Fe-Cr.
4. Output terminal:- LINE OUT.
5. Load:- Measuring instrument input im-
pedance.
6. Test tape used:- SONY CS-30.
PROCEDURES
1. Connect the input signal to the MIC ter-
minal. Set up the tape deck to the normal
recording state.
2. {In turn, reduce the input level by 20dB with
the use of the attenuator. Record the 1 and
10kHz tones.
3. Play the 1kHz, 20dB-down recorded tone
back as OdB. Adjust the recording bias
current until the 10kHz response is within
+1dB as referenced to the 1kHz, OdB re-
sponse,
4. Proceed both for the right and left channels
in the same manner.
5, If the recording bias current is reduced in
the above adjustment, be sure to measure
the distortion.
Mode: record
\kHz, 60dB
af OSC
Sionk Tope
attenuator
Recorded
Portion VTVM
!00KQ LZ]
im
9. Record-Playback Output Level Adjustment
SET UP
1. Power voltage:- 50 or 60Hz AC voltage rated
for the unit to be used in a market country.
2. Input:- 1kHz, —60daB signal.
3. TAPE selector switch position:- NORMAL.
4. Output terminal:- MAIN P.W. Board (P100)
J120 and J220.
5. Load:- Measuring instrument input im-
pedance.
6. Test tape used:- TDK AC-211.
PROCEDURES
1. Connect the 1kHz, —60dB input signal to
the MIC terminal. Set up the tape deck to
the normal recording state.
2. Adjust the REC LEVEL semi-fixed resistors
R140 and R240 until the recorded signal is
reproduced at 623mV +0.5cB.
CAUTION
1. If the bias current is changed, be sure to
perform the above adjustment.
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Mode: record
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af OSC Blank Tape
VTVM
Recorded
Portion [
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