Panasonic KX-MB771GR Service Manual page 240

KX-MB771GR
16.2.4. MAIN BOARD (4)
1
A
1:1D;1:4A
RING
1:4A
DP
B
1:4B;1E
AFECLK
1:4B
ASPCLK
1:4A
ABITCLK
1:4A
ARXD
1:4A
ATXD
DG
1:4A;1E
AFERST
1:4B
AINT
C
I
C
3
0
0
D
1:1E;3:4F
DAOUT
1:4A
BTXD
1:4A
BRXD
1:4B
BSPCLK
1:4B;1B
AFECLK
E
1:4A
BBITCLK
1:4A;1C
AFERST
HS TX:
F
HS RX:
MONITOR_RX:
CID
TONE
FAX-TX,RX :
HS -TX,RX :
MONITOR_RX:
2
+3.3VA1
IC100
1 16
MCLK *OFHK
+3.3VA1
15
2 *FSYNC
*RGDT/FSD/M1
14
3
SCLK
M0
4 13
VD
VA
5 12
SDO GND
11
6
SDI AOUT/*INT
+3.3VA1 10
7
FC/*RGDT C1A
8 9
*RESET
C2A
C102
K0.1u
DG
DG
+5VD +5VA
L200
VREF
L230
0
( )
NC
L229
( )
NC
DG DG2
DG
IC200
1 SPKRR
2 MBIAS
3 HDST
4 SDI
5 SDO
6 *FSYNC
7 MCLK
8 SCLK
DG DG
DG
3
R104
C106
1.07k(1/2W)
50V/1u
C104
R101 R136
56
33p/250V
C105
R102 R137
56
33p/250V
C107
R103
K0.1u
F1M
C121
10p/250V
C122
( )
NC
DG
+3.3VA1
+3.3V
L227
0
+3.3VA2
+3.3V
L202
0
+5VA
R209
( )
NC
R205
0
+3.3VA2
16
R214
SPKRL
15
0
LINEO
14
GND
13
VA
DG DG
12
VD
11
LINEI
L203
10
MIC ( )
NC
9
*RESET
C203 K0.022u R210 8.2k
C205 K0.1u R212 22k
+3.3VA2
C204 NC R211 NC
DG
( ) ( )
Q200
1:3E
B
CNGMUTE
DG
DG
KX-MB771GR SCHEMATIC DIAGRAM (MAIN BOARD No.04) (1/2)
240
4
HS-RX
IC101
1 16
QE DCT2
2
15 R108
DCT IGND
3.65k(1/2W)
3 14
RX DCT3
4 13
IB QB
5 12
C1B QE2
6
11
C2B SC
7 10
VREG VREG2
8 9
RNG1 RNG2
HS-TX
C108 R105
K0.1u 0
R109
( )
NC
R106
R112
15M
5.1M(2125)
C110
R110
( )
NC
R107
R113
15M
5.1M(2125)
C109
R219
1:1D
HSSPMUTE (
NC
C238
L208
C216
( ) ( )
( )
NC
NC
NC
C217
( )
IC201
NC
NC
DG
DG
L212
(
NC
DG L209
R218
C215
( )
( )
NC NC
C213
IC202
K1000p
1
V+
AOUT
R217
2
BOUT
A-IN
180k 3
B-IN
A+IN
R253 C247
L210 L211
4
B+IN
V-
8.2k K0.022u
DG
C214
( )
NC
C
E
5
1/2
4
-1
FAX-RX
R114
(1)
F536(3216)
(2)
Q102
R111
C
B
E
150
(3)
(4)
(5)
FAX-TX
C111
K2700p
(6)
(7)
(8)
120p
(9)
120p
R224 NC
) ( ) (10)
IC203
NC
1 8 (11)
CD VO2
2 7 (12)
FC2 GND
6
3
(13)
FC1 VCC
5
4
VIN VO1 (14)
R223
( )
NC
C221
) ( )
NC
(15)
C222
( )
8
NC
R220
7
L213
0
6
(16)
( )
C218
NC
5
( )
L214
NC
(17)
( )
R221
NC
( )
NC
C219
VREF
( )
NC
L215
R222
180k
C220
K1000p