Panasonic KX-NS500 / KX-NS520 Service Manual / Supplement ▷ View online
13
3.1.4.
Battery Backup Function Does Not Operate / PSU can Not Charge Batteries
Changed from Original Service Manual as section 9.2.4.
14
4 Schematic Diagram
4.1.
Power Supply Board
Changed from Original Service Manual as section 12.6.
12
13
14
15
1
16
17
19
18
11
10
5
6
4
2
3
9
8
7
21
20
22
23
24
30
33
28
29
25
27
26
31
32
34
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D
D
C
C
B
B
A
A
T1
5
F1
T
4
A/
2
5
0
VAC
1
1
3
3
CN
2
VH
-3
A
2
L
3
1
4
F3
T
4
A/
2
5
0
VAC
R17
82K/
2WS
R11
02
R/
1
D7 FR
2
0
7
D1
1
F
R
1
0
7
C1
4
4.7uF
/0
C2
1
2.2n
F
/0
Q6
F
D
P
F
15N
65
C5
2200P
/6
30
V
R
3
4
100R
/1
R4
6
1.8k
/0
C1
3
63
V
2
2U
D1
2
1N
4148
R22
NC
R40
10
K
/0
R2
1
NC
R3
3
22R
/1
RS
1
0.
13
R/
3
W
S
C1
7
10
1
/1
K
V
VIN
VC
C
R3
2
2.
7
K
/1
R67
100K
/0
R7
1
51
K
/0
R63
0.18
R/
2
W
S
R8
0
15K
/0
CX
1
0.22uF
/275V
CY
3
222/250V
1
2
3
4
5
6
7
8
9
10
CN
1
0
1
B1
0
B
-X
A
S
K-
1
+1
5
V
U1
B
K1
0
1
0
C1
8
10nF/0
C4
180uF/450V
U4
B
K1
0
1
0
C2
2
0.
1u
F/
50
V
R5
5
10K
/0
R5
3
43K
/0
R48
1.
2
K
/1
R5
4
4.7k
/0
R6
0
30K
/0
R5
9
3K
/0
U5
TL
4
3
1
0.
5
%
C1
9
225
t?
RT
2
22
0
K
t?
RT
1
M
F
72-
2.5R
RT
1
FB
2
CS
3
GND
4
Vou
t
5
Vcc
6
VH
8
U2
L
D
77
65
Q23
PDTD123
TT
U6
A
K1
0
1
0
R87
15K
/0
DC
-AL
M
C3
3
10
3
R82
27
K
/0
/1
%
R7
6
33K
/0
/1
%
AC
-A
L
M
1
2
3
4
C
N
102
55
6
9
-04
A1
-2
1
0
U6
B
K1
0
1
0
U3
A
K
101
0
+4
1
V
R70 180K
/0
R7
4
560
R
/0
+41
V
R85
10
K
/0
R72 20
K
/0
R8
3
47K
/0
R73 20
K
/0
R6
1
20K
/0
C2
5
684
R8
4
20K
/0
C2
10
00
pF/
1
K
V
D6
Y
G
902C
3R
1
R
7
220R
/1
R
1
0
220R
/1
R
1
4
220R
/1
R5
220R
/1
B
A
Q3
MM
B
T
2
9
0
7
Q1
0
MM
B
T
4
9
1
R2
4.3R
/1
/1
%
R3
4.3R
/1
/1
%
R4
N
C
R1
4.
3R
/1
/1
%
R3
5
100K
/0
R2
3
100K
/0
D
1
S
B
560
R1
1
3
3
0
R/
0
R1
9
47K
/0
+41
V
Z1
27V
Q1
P
3506D
T
F
R3
6
100K
/0
C1
0
3300uF/50V
Q4
MM
B
T
2
9
0
7
R6
47
K
/0
R13
10
0K
/0
R3
9
27
K
/0
R2
6
47
K
/0
R9
47
K
/0
Q9
PM
BT
3904
R3
1
20
K
/0
R2
7
20K
/0
Q7
MMB
T
4
9
1
R2
5
100K/0
R1
2
47k
/0
F2
T
4
A/
2
5
0
VA
C
L1
4
u
H
Z2
10
V
C7
10nF
Q2
P3
50
6
D
TF
C6
10
0
n
F
Q5
M
M
B
T
2907
R1
8
10K
/0
+15
V
R6
8
68K
/0/1%
R7
7
2.2
K
/0/1%
R8
6
10K
/0/1%
R78
43K
/0
/1
%
Q2
5
2N
3906
Q2
1
PM
B
T
3
9
0
4
R6
2
0.2R
/2W
S
R66 220
K
/0
Z4
27V
Z3
36
V
C31
47
1
Q11
MM
B
T
2
9
0
7
R4
3
47K
/0
Q1
4
PM
B
T
3
9
0
4
R4
7
10
0
K
/0
R5
2
47K
/0
R56
47K
/0
+15
V
Z6
12
V
CY
4
47
1
/250V
VOUT
C1
2
1000uF/50V
1
2
C
N
100
B
2
P-VH-B
(L
F
)(
S
N)
C24
50
V
3
3
0
u
F
VR
1
1
4
D
471
U1
A
K
1
010
R20
10K
/0
R30
10K
/0
U4
A
K
1010
D8
1N4
1
4
8
C1
1
3300uF/50V
2.5A
䲀⍱
L2
4
u
H
R8
1
47K
/0
R8
8
5.1K
/0
Q2
2
PM
B
T
3
9
0
4
R7
9
47K
/0
+15
V
D1
5
1N
41
48
Q18
PD
TD
123T
T
R75
47K
/0
R8
9
5
1
K
/0
VO
U
T
R2
9
160K
/0
R3
8
160K
/0
D9
RL
20
7
D1
0
RL
2
0
7
R4
2
160K
/0
R4
9
39
K
/0
Q1
2
PM
BT
3
9
0
4
Z
7
6.8V
R5
1
100K
/0
R4
4
82
0
K
/0
R4
1
10
K
/0
R3
7
56
K
/0
R2
8
22
K
/0
Q8
MMB
T
3
9
0
6
R4
5
56
K
/0
Q13
PMBT390
4
R50
22
K
/0
VC
C
L
N
C1
5
100n
F/0
C20
10
0
n
F
/0
Q2
6
PM
B
T
3
9
0
4
CY
5
4
7
1/25
0
V
L
4
S
H
G
1908A
-103-
L
1,L
2
C2
8
25
V
1
0
0
uF
Q1
7
MMBT3906
U8
T
L
43
1
0.
5
%
R9
1
10K
/0
+15
V
R9
2
47
K
/0
R93
10K
/0
R9
4
47K
/0
R9
5
0R
/0
R9
6
3.9
K
/0
D1
7
1N
4148
FT
1
Vi
n
1
Vou
t
2
GND
3
FB
4
SD
5
U7
AP
1
5
01
L3
10
0
u
H
D1
4
SB
5
6
0
R64
3
3
K
/0/1%
R6
5
3K
/0/1%
R6
9
12K
/0
C2
6
25V
220uF
+1
5
V
320m
A
Q2
7
MMB
T
2
9
0
7
Q28
MM
B
T
4
9
1
D1
8
BA
W
5
6
Q2
9
M
M
B
T
2907
Q3
0
MMB
T
3
9
0
6
Q3
1
MMB
T
4
9
1
Z1
2
18V
R97
4.
7K
/0
D1
6
1N
41
4
8
R9
8
20K
/0
R9
9
15K
/1
R1
00
47K
/0
C2
7
4
72
D1
9
F
R
1
0
7
C3
2
50
V
4
.7
U
C3
0
103
R1
0
1
6.8
K
/0
C3
5
22
1
C36
3300uF/50V
R9
0
0Ω
/0
D2
0
R
L
207
D2
1
RL
20
7
Z1
3
15V
Q1
5
P
371
0
B
T
F
Q1
9
UM
X
2
NT
R
Z1
1
15V
D2
2
1N
4148
C3
4
NC
+4
1V
-2
C3
7
25
V
1
0
0uF
D2
3
1N
41
4
8
+6
0V
+6
0V
R10
2
47
K
/0
C3
8
47
4
D2
4
1N
41
4
8
C4
1
NC
C4
2
NC
L5
4
u
H
C4
4
10
4
C4
3
10
4
F4
T
2
A
/250V
AC
U3
B
K
1010
Z9
36V
VOUT
R5
7
1K
/0
Z8
10V
D1
3
BA
V
7
0
Z1
0
18V
R5
8
6.
8K
/0
+15V
R1
04
18K
/1
R1
06
100K
/0
Z1
4
24V
+4
1
V
R1
08
20K
/0
R1
07
43K
/0/
1
%
C4
5
103
+15V
R1
0
5
6
8
0R
/0/1%
R
121,
R
1
22
15K
/1
VIN
R1
09
56K
/0
R2
4
5
.1
R
/1
R
103
10
0R
/1
D2
5
1N
4148
C8
1u
F
/0
C3
9
10
5
Z5
NC
C3
1uF
/0
Z1
5
NC
Z1
6
NC
Z1
9
24V
Z2
0
24
V
Z1
7
24V
Z1
8
24
V
N
L
C1 1000pF
/1K
V
Q1
6
NC
Q3
3
PK
6
1
5
B
M
A
Q3
2
2N
70
0
2
Q2
4
2N
70
0
2
R1
1
2
56K
/0/1%
R1
13
4
3
K
/0/1%
TVS
1
18
0
V
F5
T
2
A
/250V
AC
F6
T
2
A
/250V
A
C
Q34
PMBT390
4
R11
5
4.7K
/0
R116
4.7K/0
R11
7
20K
/1
Q35
PMBT390
4
R1
18
4.7K
/0
R1
19
10K
/0
+15
V
R11
1N
C
C9
NC
D2
6
N
C
R13
2
4.
3
K
/1
R13
3
4.
3
K
/1
R1
3
4
4.
3
K
/1
R1
3
5
4.
3
K
/1
TV
S
2
55
0
V
TVS3
22
V
TVS4
27
V
TV
S
5
NC
D3
1N
414
8
D4 1N
414
8
R
136
510
K
/0
C23
475
C29
475
R1
3
7
0.56
R/
2W
S
C16
10
4
FG
FG
FG
C4
0
NC
+
4
1
V-2
R1
38
12K
/0
AC
I
N
P
U
T
N
-LI
NE
L-
L
IN
E
MM
B
T
3
9
0
4
MM
B
T
3
9
0
4
MM
B
T
3
9
0
4
MMB
T3904
MMB
T3
90
4
MMB
T3
904
MMB
T3904
MM
BT
3
9
0
4
MMB
T
3
9
0
4
Ba
tt
er
y+
Ba
tt
er
y-
CY
7
222/250V
R1
4
2
4.
7K
/0
R1
3
9
47R
/0
R1
40
NC
VC
C
1
VC
C
1
LF
2
S
H
D
1
0
3
2F
-1
74S
-L
F2
CX
2
0
.47
uF/275
V
R8 1M
/1
R1
5
1M
/1
R1
6
1M
/1
D2
K
B
J
408
L
N
CY1
222/250V
CY
2
22
2/2
50
V
LF
1
SH
G
3
2
0
2
E
-1
5
5
S
-L
F
1
R11
4
1M
/1
FG
R
123,
R
1
24,R
12
5
R
126,
R
1
27,R
12
8
R
129,
R
1
30
15
4.2.
Waveform
4.2.1.
Power Supply Board
Changed from Original Service Manual as section 12.7.6.
1
2
3
4
5
6
7
8
VOLTAGE
312V
312V
VOLTAGE
328V
328V
CYCLE
10.00ms
10.00ms
VOLTAGE
18.0V
18.0V
CYCLE
10.00ms
10.00ms
VOLTAGE
14.6V
14.6V
CYCLE
30.80μs
30.80μs
VOLTAGE
5.84V
5.84V
VOLTAGE
2.80V
2.80V
16
９
10
11
12
13
14
15
16
VOLTAGE
0V
0V
VOLTAGE
19.0V
19.0V
VOLTAGE
18.8V
18.8V
VOLTAGE
472V
472V
CYCLE
32.40μs
32.40μs
VOLTAGE
27.2V
27.2V
CYCLE
32.20μs
32.20μs
VOLTAGE
48.0V
48.0V
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