Revox C 221 Bedienungsanleitung Seite 36

User and Service Manual C221
CD Player
nd/ox
4.2
Table of
contents
4
4.1
Functional description
Seruo board
4.1.1
Control of the supply voltages
-
power supply
4.1.2
Focus
control
-
photo diode signal processor
4.1.3
Radial
control
-
radial processor
4.1.4
Motor speed control
-
demodulator
4.1
.5
Servo processor
Convefter board
4.2.1
Microprocessor
4.2.2
Serial
system bus
-
optocoupler
4.2.3
Parallel remote connection
-
optocoupler
4.2.4
Digital/analog conversion
4.2.5
Reset circuit
4.2.6
Modulation start monitoring
4.2.7
DIP
switches (SWl)
Line amplifier board
4.3.1
Line
amplifier
4.3.2
Muting of the balanced outputs
Front board
4.4.1
Keypad
4.4.2
Display
5
Test points/alignment
5.1
Test points
-
seruo board
5.2
Test points
-
converter board
5.3
Alignment
-
seruo board
5.3.1
Aligning the focus voltage
5.3.2
Aligning the laser current
5.4
Alignment
-
converter board
6
Measuring the audio data
6.1
Required auxiliary materials
6.2
Harmonic distortion
6.3
Output level
6.4
Frequency response
6.5
Channel separation
6.6
Signal-to-noise ratio, unweighted
6.7
Signal-to-noise ratio, weighted
6.8
Phase linearity
6.9
Listening test
29
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30
30
30
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32
32
33
33
33
34
35
36
36
36
37
37
37
38
38
39
40
40
40
40
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42
43
43
44
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44
4.3
4.4
41
41