Panasonic KX-TC1811B Service Manual ▷ View online
25 CIRCUIT BOARD (Base Unit)
25.1. Component View
RF UNIT
CN101
B
C
E
C
E
B
C
E
C
E
E
B
B
B
E
E
C
E
B
B
C
C
ANT GND
ANT
LA
LB
E
C
B
C
B
E
C
B
C
B
E
C
B
C
B
B C E
C381
C371
C773
C774
R771
R772
C774
R771
R772
Q381
R134
R371
R133
R381
R382
R140
R139
R432
R431
C704
R383
C431
C133
R132
D381
C432
C433
C798
J902
C551
C797
C927
C796
C795
C794
C793
C792
C791
R901
R902
C905
C904
C903
R757
C919
L903
L501
R541
R703
R703
C108
C920
RA903
RA902
R385
Q751
R107
C926
C922
J911
C506
C507
R726
C727
R727
R727
R411
C446
C444
C413
R412
R414
R542
Q304
D515
R321
R715
Q321
D715
D716
D717
D321
MICP
R344
C724
R336
R335
IC331
R334
R722
R724
C726
R332
R903
R331
R331
C332
C342
Q342
Q341
R345
J900
Q343
MICM
R413
C412
L515
J2
R443
C443
C443
Q753
R461
C441
R442
R415
C415
C470
D445
C782
R779
C463
C781
R782
J903
R465
C465
R446
C442
C445
R444
R702
C783
C411
L902
L901
J910
R708
R707
C735
R752
C701
D371
E C B
IC551
IC501
IC301
IC751
B
E C
E C
B
E C
E C
B
E
E
C
C
C
E B
E B
C
C
E B
E B
B
E C
E C
B
E C
E C
C
B E
C685
R765
C686
Q461
C464
Q752
Q445
C780
JGND1
R448
R447
C467
C467
R464
R762
C717
R445
C915
R728
C684
Q601
SP+
SP-
CM+
CM-
KX-TC1811B
69
25.2. Flow Solder Side View
KX-TC1811B
70
26 SCHEMATIC DIAGRAM (Base Unit)
IC331
IC301
IC551
SP Phone Tx
SP Phone Rx
TALK Tx
TALK Rx
-51dBm/600
Ω
1.1KHz
4.2V
215mV
730mV
4.1V
4.5V
4.5V
4.2V
3.6V
10.5V
7.6V
10.5V
7.7V
7.4V
4.2V
960mVp-p
255mVp-p
760mVp-p
105mVp-p
175mVp-p
85mVp-p
22mVp-p
1000mVp-p
Output
140mVp-p
(-25dBm/600
Ω
)
Input 1.1kHz
IC751
IC501
* "NC" is the part not used.
KX-TC1811B
71
KX-TC1811B
72
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