Panasonic SB-WA840, Руководство по обслуживанию

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7 Voltage Measurement and Waveform Chart
Note:
· Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance)
with the chassis taken as standard.
Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
· Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point
because it may differ from actual measuring value due to difference of Measuring instrument and its measuring condition
and product itself.
7.1. Voltage Measurement
Ref No.
MODE E C B E C B E C B E C B
CD PLAY 0.1 0.1 0.8 0 3.7 -0.2 6.0 13.6 6.6 0.1 0.8 0
STANDBY 0 6.0 0 0 3.6 -0.3 6.0 11.3 6.5 0 0 0
Ref No.
MODE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CD PLAY 0 0 67.5 -67.6 0 33.2 -33.3 0 0.1 0 0 0 0 -0.2 33.5 -33.6 -10.5 0 0 67.6
STANDBY 0 0 16.8 0.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.0
Ref No.
MODE 21 22 23 24 25 26
CD PLAY -67.5 0 0 0 0 0
STANDBY 0.4 0 0 0 0 0
Ref No.
MODE E C B E C B 1 2 3 E C B E C B
CD PLAY 0 5.2 0 0 5.2 0 0 0 -1.5 0 0.8 0 0.8 0 0.8
STANDBY 0 0.7 0 0 0.7 0 0 0 0 0 -0.3 0 -0.3 0 -0.3
Ref No.
MODE E C B E C B E C B E C B E C B
CD PLAY 5.2 33.5 5.6 -11.3 -33.5 -11.9 0 -1.5 0 0 -11.3 0.2 -11.3 5.0 -11.3
STANDBY 0.4 -0.3 -0.3 0 0.1 0.1 0 0 0 0 0 0 0 0.4 0
Ref No.
MODE E C B E C B E C B E C B
CD PLAY 5.1 - 4.7 4.7 5.2 - 0 0.4 -0.2 0.3 5.2 0
STANDBY 0.4 0 0 0.5 0.4 0 0 0.3 0 0.3 0.7 0
Q512 Q553
Q556
Q520 Q552
Q503
Q515
INLET P.C.B.
Q516
Q554 Q555 Q557
Q501
Q511
Q519
TRANSFORMER P.C.B.
IC501
IC501
Q502
Q517
Q505 Q506
7.2. Waveform Chart
CN501 PIN 1
CD PLAY
19.4Vp-p (10msec.div)
CN501 PIN 3
CD PLAY
19.4Vp-p (10msec.div)
CN501 PIN 21
CD PLAY
5.28Vp-p (10msec.div)
CN501 PIN 22
CD PLAY
7.20Vp-p (10msec.div)
CN501 PIN 24
CD PLAY
6.92Vp-p (10msec.div)
CN503 PIN 1
CD PLAY
69.6Vp-p (10msec.div)
CN503 PIN 7
CD PLAY
70.0Vp-p (10msec.div)
CN501 PIN 8
CD PLAY
1.00Vp-p (10msec.div)
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SB-WA840EE