Text preview for : schtun1.pdf part of PANASONIC SA-PM25 S.M.
Back to : PANASONIC SA-PM25.part1.r | Home
SCHEMATIC DIAGRAM-5
: AM/FM SIGNAL LINE : AM OSC SIGNAL LINE : AM SIGNAL LINE : FM OSC SIGNAL LINE : FM SIGNAL LINE
0.01
TUNER (MAIN) CIRCUIT TUNER PACK CIRCUIT
5.6P 2SK544 RF AMP
: +B SIGNAL LINE
1.2u
1 FM EXT ANT 75 OHM 1 2 2 3
100K 100K
2.2P 0.47u
CF1 RLFFETWN02DD 7 1 3 C4 1000P
R5 470
<0.38V> (0V)
330
2SC2786M FM MIXER
C3
R7
R6 470K
<3.65V> (0V)
C5 5.6P
<0.57V> (0V)
R8
820K
3.3P
180P
10P
680
0.001
390 0.001
2
Q1
<0V> (0V)
100K 220 390 2SC1675L1L2 BUFFER AMP LOCAL OSC 390
4 5
2.7K
6
16V100 0.01 C2
560K 4.7P
C1
R3 100
2.2P
680K 2.2P
10P
JK1
8
Q1
2SC2787LTA
SWITCHING Q2 AMPLIFIER FM IF
<3.95V> (4.27V)
2SC2786MTA
<5.44 (5.77
C36
C14
AM LOOP ANT
C9
3
50V3.3
L1 0.68UH Z1 AM ANT COIL
2
1000P
1000P
24
FM IF in OSC OUT
R19
0.68UH
R18
5 1 6
4.7K
4
33K
<2.06V> (2.06V)
AM EXT ANT
4
L2
3
RLA2Z006M-T
AM OSC COIL
9 8 7
1
<5.4 (5.7
16V22 C26
0.047
C27
R10 5.6K
C7 0.047 100K C8 R12 8.2P
Z2 R
2 1 6
R17 68K R11 390
C30 6.3VV100 1000P C25 25V22 R13 10K C32 D1
R28 82
R14 5.6K
C11 50V 4.7
R15 560
R29
0.47UH 1000P C13
27K
<0.01V> (0V)
<2.50V> (0V)
C10 0.01
C33 15P
<2.59V> (2.59V)
<0V> <1.84V> <0.92V> <0.92V> (0V) (1.09V) (0.93V) (0.93V)
<5.24V> (5.24V)
<0.01V> (2.48V)
<0.01V> (0.01V)
C12 0.01
R16 1K 16
PD
L3
20
Xout
19
VSS
18
AOUT
17
AIN
15
VDD
14
FMIN
13
AMIN
12
MONO STRQ
11
IFIN
<0.07V> (14.77V)
X3 CL Xin CE
IC2
SDC DO AM LW DI FM
<0.01V> (0V)
<0.32V> (0.32V)
C34 18P
R38 3.3K R30 10K
<0.46V> (0.46V)
<0.46V> (0.47V)
<5.24V> (5.24V)
<4.35V> (0.16V)
1K R35
R37
IC2
1K R34 470
1K R36
PLL IC (TUNER)
LC72131MDTRM
CE
DI
DO
CL
<3.93V> (4.25V)
<0.03V> (0.02V)
<2.56V> 1 (2.56V)
2
3
4
5
6
7
8
9
10