Read Panasonic KX-UT248RU / KX-UT248RU-B (serv.man2) Service Manual Simplified online
6
KX-UT248RU/KX-UT248RU-B
1.3.3.
Main Board No.3
Change from the Original Service Manual Section 12.3
L1
L2
C
E
B
A
D
F
3
6
4
2
5
8
7
MAIN BOARD No.3
F301
32
3
OPE_VCC
004:7C
C357 0.01u
DG
DG
DG
DG
DG
IC304
1
CE
2
GND
3
VFB
5
VIN
4
EXT
R320
10
DG
Q301
R305
47
DG
DG
DG
DG
LF301
1
2
3
4
PoE_DC
C362 1000p
C343 NC
DG
PDN
D304
2
1
1
3
R312
0
DG
DG
C322
0.01u
16
L302
10u
C311
10u
DL302
1
2
3
DG
DG
DG
DG
DG
DG
DG
DG
DL301
1
2
3
DL303
1
2
3
DG
DG
C301
NC
DG
C365 0.01u
16
DG
DG
D301
D302
D303
D305
D308
IC303
NC
2
VSS
3
VIN
1
VOUT
DG
R311
NC
R329
100
D310
2
1
R310
10k
C335
470u
16
C336
470u
16
L301
22u
C314
NC
R307
51
C315
0.1u
16
C321
470p
IC302
1
CE
2
VIN
4
BST
5
GND
3
LX
6
VFB
C306
0.1u
C307
0.1u
C310
0.1u
C313
0.1u
C323
0.1u
C353
0.1u
C363
0.1u
C364
0.1u
R302
33k
1%
R313
33k
F
1%
R306
1.2k
1%
F
R303
6.2k
1%
F
R304
47k
1%
R319
20k
1%
CN
80
3R
R309
100k
1%
R318
10k
F
DG
DG
L304
10u
C354
6 1
u 1 . 0
DG
D309
DG
LCD20V_EN
001:7C;001:9E
C302
10u
C316
10u
DG
C308
10u
DG
DG
C355
4.7u
16V
IC305
1
SW
2
GND
4
CTRL
5
OV
3
FB
6
VIN
C356
4.7u
16V
R328
100k
C317
0.1u
DG
DG
C326
0.1u
C342
0.1u
16
DG
C339
0.1u
16
C305
10u
C312
10u
R321
47k
24V
3.3V
12V
12V
DCIN
3.3V
VDD33
3.3VA
3.3VA
5V
3.3V
1.2V
5V
24V
1.2V
DG
3.3V
DCIN1
3.3VA
5V
R325
47k
DG
R324
62k
5V_PNL
L303
C319
0.1u
C304
47u
6.3
R333
10
R334
10
JK301
2
3
1
AG
STARPOINT-G2
IC301
1
CE/CSS
2
VSS
3
FB
5
VIN
4
EXT/
C325 0.1u
C309
0.01u
R326
47
Q302
D306
DG
L305
10u
R315
0.1
C318
0.01u
DG
C303
22u
R301
0
R316
0
R317
10k
R327
30k
C327
1000p
DG
C320
3300pF
C328
0.01u
C359
0 5
u 1 . 0
C366
10u
16
C324
10u
16
C329
1000p
C330
1000p
C331
1000p
C332
1000p
C334
1000p
C337
1000p
C338
1000p
AG
DG
R330
150
IC306
1
VIN
2
VSS
3
CE
5
VOUT
4
NC
R314
11k
R322
4.3k
R323
430
Vr=30V/Vf=0.39V
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