Voltage Measurement And Waveform Chart; Voltage Measurement; Waveform Chart - Panasonic SB-WA840 Service Manual

SB-WA840EE

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.
Q515
MODE E C
CD PLAY 0.1 0.1
STANDBY 0 6.0
Ref No.
MODE 1 2
CD PLAY 0 0
STANDBY 0 0
Ref No.
MODE 21 22
CD PLAY -67.5 0
STANDBY 0.4 0
Q501
Ref No.
MODE E C
CD PLAY 0 5.2
STANDBY 0 0.7
Q511
Ref No.
MODE E C
CD PLAY 5.2 33.5
STANDBY 0.4 -0.3
Q554
Ref No.
MODE E C
CD PLAY 5.1 -
STANDBY 0.4 0
7.2.

Waveform Chart

CN501 PIN 1
CD PLAY
19.4Vp-p (10msec.div)
CN501 PIN 22
CD PLAY
7.20Vp-p (10msec.div)
Q516
B E C B
0.8 0 3.7 -0.2
0 0 3.6 -0.3
TRANSFORMER P.C.B.
3 4 5 6 7
67.5 -67.6 0 33.2 -33.3
16.8 0.4 0 0 0
23 24 25 26
0 0 0 0
0 0 0 0
Q502
B E C B
0 0 5.2 0
0 0 0.7 0
Q512
B E C B
5.6 -11.3 -33.5 -11.9
-0.3 0 0.1 0.1
Q555
B E C B
4.7 4.7 5.2 -
0 0.5 0.4 0
CN501 PIN 3
CD PLAY
19.4Vp-p (10msec.div)
CN501 PIN 24
CD PLAY
6.92Vp-p (10msec.div)
INLET P.C.B.
Q517
E C B
6.0 13.6 6.6
6.0 11.3 6.5
IC501
8 9 10 11 12
0 0.1 0 0 0
0 0 0 0 0
IC501
Q503
1 2 3
0 0 -1.5
0 0 0
Q520
E C B
0 -1.5 0
0 0 0
Q556
E C B
0 0.4 -0.2
0 0.3 0
CN501 PIN 8
CD PLAY
1.00Vp-p (10msec.div)
CN503 PIN 1
CD PLAY
69.6Vp-p (10msec.div)
14
Q519
E C B
0.1 0.8 0
0 0 0
13 14 15 16 17
0 -0.2 33.5 -33.6 -10.5
0 0 0 0 0
Q505
E C B E
0 0.8 0 0.8
0 -0.3 0 -0.3
Q552
E C B E
0 -11.3 0.2 -11.3
0 0 0 0
Q557
E C B
0.3 5.2 0
0.3 0.7 0
CN501 PIN 21
CD PLAY
5.28Vp-p (10msec.div)
CN503 PIN 7
CD PLAY
70.0Vp-p (10msec.div)
18 19 20
0 0 67.6
0 0 17.0
Q506
C B
0 0.8
0 -0.3
Q553
C B
5.0 -11.3
0.4 0