Panasonic SB-WA500EB / SB-WA500EE / SB-WA500EG / SB-WA500GN / SB-WA500GS / SB-WA500PH Service Manual ▷ View online
21
Step 4 : Remove Switch Regulator IC (IC5200) from the Heat-
sink Unit.
sink Unit.
7.11.2.
Assembly of Switch Regulator IC
(IC5200)
(IC5200)
Step 1 : Apply Grease on the Heatsink Unit.
Step 2 : Mount the Switch Regulator IC (IC5200) onto the D-
Amp P.C.B..
Step 2 : Mount the Switch Regulator IC (IC5200) onto the D-
Amp P.C.B..
Step 3 : Solder pins of Switch Regulator IC (IC5200) on the sol-
der side of D-Amp P.C.B..
Caution : Ensure the pins of Switch Regulator IC are prop-
erly seated & soldered on D-Amp P.C.B. during assembly.
der side of D-Amp P.C.B..
Caution : Ensure the pins of Switch Regulator IC are prop-
erly seated & soldered on D-Amp P.C.B. during assembly.
22
Step 4 : Flip back the D-Amp P.C.B..
Caution : Avoid touching the Heatsink Unit due to its high
temperature after prolonged use. Touching it may lead to
injuries.
Caution : Avoid touching the Heatsink Unit due to its high
temperature after prolonged use. Touching it may lead to
injuries.
Step 5 : Fix the Heatsink Clip onto the Heatsink unit.
Caution : Ensure the Heatsink Clip is fully inserted onto
the Heatsink unit.
Caution : Ensure the Heatsink Clip is fully inserted onto
the Heatsink unit.
23
8 Service Position
Note: For description of the disassembly procedures, see the Section 7.
8.1.
Checking and Repairing of D-Amp P.C.B.
Step 1 : Remove Amp Module Assembly.
Step 2 : Place the Support Box underneath the Amp Module Assembly.
Step 3 : Flip over ID Switch P.C.B. and D-Amp P.C.B. as arrow shown.
Step 4 : D-Amp P.C.B. can be checked and repaired as diagram shown.
Step 2 : Place the Support Box underneath the Amp Module Assembly.
Step 3 : Flip over ID Switch P.C.B. and D-Amp P.C.B. as arrow shown.
Step 4 : D-Amp P.C.B. can be checked and repaired as diagram shown.
24
9 Voltage Measurement & 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.
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.
9.1.
D-AMP P.C.B.
9.2.
Waveform Chart
REF NO.
MODE
1
2
3
4
5
6
7
8
CD PLAY
0
0
0
-15.0
0
0
0
16.0
STANDBY
0
0
0
-15.1
0
0
0
16.0
REF NO.
MODE
1
2
3
4
5
6
7
8
CD PLAY
0
0
0
-14.9
0
0
-0.3
16.0
STANDBY
0
0
0
-15.1
0
0
-0.3
16.0
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
-19.5
0
0
24.3
0
-24.8 -16.3 24.9
8.9
0
-25.0 -15.0 -25.0 -0.2
8.8
24.9 -24.8 -24.8
0
24.6
STANDBY
-19.5
0
0
24.6
0
-24.9 -16.4 24.9
8.9
0
-25.1 -15.0 -25.1
0
8.9
24.9 -24.9 -24.9
0
24.6
REF NO.
MODE
21
22
23
CD PLAY
0
0
4.7
STANDBY
0
0
2.3
REF NO.
MODE
E
C
B
E
C
B
E
C
B
E
C
B
E
C
B
CD PLAY
24.3 24.3 23.6
5.0
4.8
4.1
0
0
3.1
0
4.6
0
0
3.5
0
STANDBY
24.2 24.2 23.6
4.4
4.6
3.9
0
0
3.1
0
0
3.1
0
2.9
0
REF NO.
MODE
E
C
B
E
C
B
E
C
B
E
C
B
E
C
B
CD PLAY
0
3.7
0
0
0
3.3
24.2 24.2
0
-25.0 -25.0 -24.4
16.0 24.0 16.0
STANDBY
0
3.0
0
0
0
3.3
24.2 24.2
0
-25.0 -25.1 -24.5
16.0 23.9 16.6
REF NO.
MODE
E
C
B
E
C
B
CD PLAY
0
-15.7 -0.6
-15.1 -24.7 -15.7
STANDBY
0
-15.7 -0.6
-15.1 -24.8 -15.7
Q2010
Q2011
SB-WA500EB/EE/EG/GN/GS/PH D-AMP P.C.B.
Q1007
Q1008
Q1009
Q1010
Q1011
Q2002
Q1003
Q1004
Q1005
Q1006
IC3001
IC3002
IC5200
IC5200
WF No. IC5200-10,14 (PLAY)
68Vp-p(1usec/div)
WF No. IC5200-21 (PLAY)
0.72Vp-p(200usec/div)
WF No. IC5200-2 (PLAY)
0.72Vp-p(200usec/div)
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