Read Panasonic KV-S2087 (serv.man2) Service Manual online
123
13.1.25. No.25 (DC/DC Converter)
KS-V2087H MAIN Board No.25
F
E
D
C
B
A
78
56
4
23
F
D
A
B
E
C
+3.3VCPU
+12V
D31
Q31
C818
10u
35v
POWER_SW
1:2D;22:4C
Q32
C822
10u
25
GND
POWER_CNT
1:7C
C821
5 2
u 0 1
D30
+VCC_SUB
C834
1000p
+VCC_SUB
C843
1000p
C817
10u
25v
+3.3VSLP
GND
+2.5VSLP
+VCC_SUB
C847
10u
25v
F3
1A
+3.3VL
Q27
+3.3VCPU
R1249
1.2k
C814
47u
16v
C812
0.1u
R1252
4.7k
R1251
47k
R1254
47k
R1256
47k
R1255
47k
+VCC_SUB
C846
10u
25v
C870
1000p
C829
47u
16v
R1263
47k
R1257
4.7k
R1262
47k
D32
Q26
OVP
24:8E
R1243
820
C810
0.1u
GND
R1245
390
R1248
27k
R1247
10k
+12V
Q28
R1250
2.2k
C813
10u
25
D27
D28
R1253
1k
D29
R1266
0
D33
IC56
1
A
2
B
4
Y
5
VCC
3
GND
+3.3VCPU
GND
*SLEEP_LOG
1:7B;21:2C;24:3E;24:4C
R1244
1.2k
C811
2.2u
GND
R1246
12k
D26
Q25
+VCC_SUB
GND
C815
1u
Q29
GND
C841
10u
25v
Q34
Q33
R1267
47k
IC59
1
BOOT
2
VIN
3
SW
4
GND1
5
FB
6
COMP
7
EN
8
SS
9
GND2
R1269
1%
75k
R1270
1%
24k
C845 0.1u
L114
10u
C850
0.1u
C849
4700p
C848
39p
C838
1000p
C828
0.1u
R1264
75k
1%
R1265
24k
1
C826
4700p
R1259
2.2k
1%
C824
39p
L113
10u
C820
0.1u
C816
10u
25v
C823
39p
C827
0.1u
GND
R1260
62k
1%
L112
15u
R1261
11.8k
1%
C825
4700p
R1258
10k
1%
C819
0.1u
IC58
1
BOOT
2
VIN
3
SW
4
GND1
5
FB
6
COMP
7
EN
8
SS
9
GND2
IC57
1
BOOT
2
VIN
3
SW
4
GND1
5
FB
6
COMP
7
EN
8
SS
9
GND2
C855
39p
C861
0.1u
GND
IC61
1
BOOT
2
VIN
3
SW
4
GND1
5
FB
6
COMP
7
EN
8
SS
9
GND2
R1273
25.5k
1%
R1274
12k
1%
C858
4700p
R1272
3.3k
1%
C852
0.1u
L116
6.8u
L115
6.8u
C854
39p
C860
0.1u
GND
IC60
1
BOOT
2
VIN
3
SW
4
GND1
5
FB
6
COMP
7
EN
8
SS
9
GND2
R1275
21k
1%
R1276
12k
1%
C857
4700p
R1271
3.3k
1%
C851
0.1u
CF2
+5VSLP
C836
0.1u
C856
0.1u
C859
1000p
C862
0.01u
C863
0.01u
C865
0.01u
C833
0.1u
C835
0.01u
C867
0.1u
C869
1000p
C871
0.01u
C872
0.01u
C873
0.01u
C868
0.01u
C839
0.1u
C842
0.1u
C844
1000p
C837
0.01u
C840
0.01u
CL513
D34
C882
10u
10v
C883
0.1u
CL517
C874
0.1u
GND
C875
10u
10v
CL512
+1.2VCPU
C877
0.1u
C880
10u
10v
CL520
CL522
C885
10u
10v
GND
CL515
C881
10u
10v
C886
10u
10v
D37
GND
C889
0.1u
C878
0.1u
CL516
CL523
CL518
+1.2VB
+2.2VSLP
+2.2VSLP
C879
10u
10v
+2.2VSLP
C887
0.1u
C876
0.1u
D35
C884
10u
10v
CL521
CL519
CL514
GND
D36
C888
0.1u
+1.2VF
IC62
6
VIN
3
ON/OFF
1
VOUT
2
VSS1
4
SSC
5
VSS2
IC64
6
VIN
3
ON/OFF
1
VOUT
2
VSS1
4
SSC
5
VSS2
IC65
6
VIN
3
ON/OFF
1
VOUT
2
VSS1
4
SSC
5
VSS2
IC63
3
SSC
4
VIN
5
VOUT
1
ON/OFF
2
VSS
C2137
1000pF
GND
+1.8VSLP
C2138
1000pF
GND
C2139
1000pF
C2140
1000pF
C2141
1000pF
C2142
1000pF
+2.2VSLP
GND
+2.5VSLP
C2143
1000pF
C2144
1000pF
C2145
1000pF
C2146
1000pF
GND
+3.3VL
C2150
1000pF
C2151
1000pF
C2152
1000pF
C2153
1000pF
C2154
1000pF
C2155
1000pF
GND
+3.3VSLP
C2156
1000pF
C2157
1000pF
C2158
1000pF
C2159
1000pF
C2160
1000pF
C2161
1000pF
C2162
1000pF
C2163
1000pF
GND
C2185
0.1u
GND
C853
47uF
6.3V
C830
22u
10V
C832
22u
10V
C831
47u
6.3V
C866
47u
6.3V
C864
47u
6.3V
R1268
3.3k
1%
CL622
CL623
CL624
CL625
CL626
Q30
R2162
47k
R2163
47k
Q62
Q63
R2164
10k
GND
R2165
10k
R2166
12k
R2167
100k
+12V
C2269
0.1u
D2101
5.856V
12V
3.3V
2.5V
2.2V
5V
3.3V
Power ON/OFF
OVP
3.3VCPU
1.2VCPU
2.2V
1.8V
2.2V
1.2VFRONT
2.2V
1.2VBACK
DC/DC Converter
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