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HCD-M10
Record Level Check
Procedure:
1. Press FUNCTION button to select ANALOG IN.
2. Insert a tape into deck, press the z TAPE button, and then press
the X TAPE button to start recording.
3. Mode: Record
PJ301
ANALOG IN
1) 315 Hz
2) 60 Hz
3) 5 kHz
AF OSC
4) 10 kHz
600 Ω
attenuator
4. Mode: Playback
recorded
position
set
5. The playback output level should be –2 ±4 dBs (60 Hz),
–1 ±4 dBs (8 kHz) and –3 ±4 dBs (10 kHz) compared with 315Hz
playback level.
28
109 mV (–17 dB)
blank tape
CS-123
set
level meter
J301
PHONES
32 Ω
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
RF Level Check
CD BOARD
TP(RFAC)
TP(DVC 1.65V)
Procedure :
1. Connect oscilloscope to TP (RFAC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
Note: Clear RF signal waveform means that the shape "◊" can be
clearly distinguished at the center of the waveform.
E-F Balance (1 Track jump) Check
CD BOARD
TP(TE)
TP(DVC 1.65V)
Procedure:
1. Connect oscilloscope to TP (TE) and TP (DVC 1.65V).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the u button. (Becomes the 1track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
0V
B=1.3 ± 0.6Vp-p
A
Specification level:
1.3±0.6Vp-p
oscilloscope
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.1 ± 0.3Vp-p
Oscilloscope
Center of
waveform
B
A (DC voltage)
Symmetry
x 100=less than ±22%
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