Cambridge Audio Azur 840C, Service Manual

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Cambridge Audio Azur 840C CD Player
AP19129/5
D
A
C
T
est Signals (Main Signal P
aths Right Channel)
Test Point
Schematic Ref
Page
Signal Type
Measurement
Node
e
py
T
r
et
e
M
t
n
e
m
er
us
a
e
M
n
oit
pi
rc
s
e
D
Approx -0.45V dc
Voltmeter’scope
1kHz sine wave 2V p-p
scope
0.02% THD+N (22K BW)
THD meter
Voltage/Analogue
Approx -0.45V dc
voltmeter
THD meter
1kHz sine wave 2V p-p
scope
0.02% THD+N (22K BW)
THD meter
Voltage/Analogue
Less than 5mV dc
Voltmeter’scope
THD meter
1kHz sine wave 6.3V p-p
2.2Vrms
scope
approx 0.001% THD+N (22K
BW
)
THD meter
(0.0006% THD +N (22K BW)
bal a/c
p
ins 4 & 5 U35
)
THD meter
Voltage/Analogue
Less than 5mV dc
voltmeter
THD meter
1kHz sine wave 6.3V p-p
2.2Vrms
scope
approx 0.001% THD+N (22K
BW
THD meter
(0.0006% THD +N (22K BW)
bal a/c
p
ins 4 & 5 U35
)
THD meter
Voltage/Analogue
Less than 5mV dc
voltmeter
THD meter
1kHz sine wave 6.3V p-p
2.2Vrms
scope
approx 0.0006% THD +N (22K
BW
)
THD meter
Current to voltage O/P +ve dc voltage / ac waveform / THD measurement (CD selected With disc playing 1kHz 0dB FS tone)
6
ni
p
4
3
U
4
*
4
5
Current to voltage O/P -ve dc voltage / ac waveform / THD measurement (CD selected With disc playing 1kHz 0dB FS tone)
53
4
Voltage/Analogue
U33 pin 6
4
ni
p
5
3
U
4
*
5
5
THD measurement (CD selected With disc playing 1kHz 0dB FS tone)
5
ni
p
5
3
U
4
*
6
5
THD measurement (CD selected With disc playing 1kHz 0dB FS tone)
*THD Measurements: Measurements taken using Audio Precision System 1 with X1 1M scope prob
7
ni
p
0
5
U
4
*
7
5
O/P unbalanced stage dc voltage / ac waveform / THD measurement (CD selected With disc playing 1kHz 0dB FS tone)
30