Panasonic SA-AK18 Service Manual page 41

SCHEMATIC DIAGRAM-8
MAIN/TUNER CIRCUIT
R401
JK305
10K
Lch
AUX
Rch
R201
10K
R210
1K
RCH
R209
47K
R410
LCH 1K
R409
47K
R454
10K
DO/ST
SD
C300
0.01
CE
R300
C301
4.7K
1000P
CN303
CDL
1
A GND
2
CDR
3
CDDGND
4
CD3.3V
5
6
CD7.5V
7
PGND
8
TO
+7.5V
9
PANEL
MIC
10
CIRCUIT
MIC G
11
(CP605) ON
CHG_AD1
12
SCHEMATIC
SD
13
DIAGRAM-11
CHG_AD2
14
SPCLK
15
SPDATA
16
CD
17
MUTEA
18
PCONT
19
LVL1/VBASS
20
CN304
PBL
10
PBR
9
AGND
8
TO
RECL
7
DECK
RECR
6
CIRCUIT
+14V
112mA
5
(H1001/W1001)
DGND
4
ON SCHEMATIC
75-700mA
MO+B
DIAGRAM-12 3
MOGND
2
MECA.G
1
: +B Line
: -B Line
R233 R307
220K 10K
R433
220K
MIC=1.3V
CD0dB=1.58V
R301 C305
22K 1500P
R305
CLA=276mV 10K
R302 C306
302
18K 50V0.1
0V((0V))
TUNERL 30%MOD=120mV
<0V>
R207
0V((0V))
1.5K CLA=215mV
PBR <0V>
0V((0V))
<0V>
0V((0V))
80mV
<0V>
-7.5V((-7.5V))
<-7.5V>
0V((0V))
<0V>
CLA=276mV
0V((0V))
<0V>
ST_DO
301
0V((0V))
SD
<0V>
R407
0V((0V))
1.5K
PBL
<0V>
0V((0V))
<0V>
0V((0V))
<0V>
R308
3.3K
+7.5V
R309 R344
3.3K 10K
15V
0V
PLLCK ((0V))
<0V>
PLLDA
PLLCE
R212 R412
CDL
4.7K 4.7K
CDR
R211 R411
CD3.3V
2.2K 2.2K
CDR
CD7.5V
CDL
+7.5V
MIC
CHG_AD1
SD
CHG_AD2
SPCLK
SPDATA
CD
MUTEA
PCONT
LVL1
PBL
PBR
15V
MO10V
: Main Signal Line : Playback Signal Line
: AUX Signal Line : CD Signal Line
R310
C308
1K
0.047
C207
50V1
0V((0V))
<0V>
64 63 62 61 60 59 58 57 56 55 54 53 52 51
65
66
IN2F VIDEO/MD
67 IN2E TUNER
68
IN2D TAPE PB
69 IN2C CD
70 IN2B EXTIN
71 IN2A PHONO/AUX
IC303
72 AVSS
73 AGND IC303
M62433AFP
74 IN1A PHONO/AUX
AUDIO IC
75 IN1B EXTIN
IN1C CD
76
77 IN1D TAPE PB
78
IN1E TUNER
79 IN1F VIDEO/MD
80
1 2 3 4 5 6 7 8 9 10 11 12 13 14
0V((0V))
<0V>
R306
1.2K
R304
C307
22K
1000P
0.1V
D311
((0.1V))
1SS355TE17
<0.1V>
Q304
Q304
KTC3875GRTA
SWITCHING
(LEVEL 3DAI)
CLA=480mV
R213 R413
39K 39K
CD-0dB=1.58V
20mV
R215 R415
1K
1K
41
: FM/AM Signal Line
: Record Signal Line
C217 C218
0.033 50V0.15
50 49 48 47 46 45 44 43 42 41
0V((0V))
VOLOUT2
<0V>
40
0V((0V))
<0V>
BUFIN2 39
0V((0V)) C220
<0V> 1000P
38
BUFNF2
0V((0V))
<0V>
AUX SENS 263mV BUFOUT2 37
7.6V((7.6V))
<7.6V>
AVDD 36
0V((0V))
<0V>
35
DGND
5V((5V))
<5V>
LATCH 34
0V((0V))
<0V>
DATA 33
0V((0V))
<0V>
32
CLK
5.2V((5.2V))
<5.2V>
DVDD
31
0V((7.5V))
<7.5V>
PLLCE PORTB 30
0V((0V))
<0V>
29
AI3D PORTA
0V((0V))
<0V>
AUX SENS 263mV BUFOUT1 28
0V((0V))
<0V>
BUFNF1 27
0V((0V))
<0V>
BUFIN1 26
0V((0V)) C420
<0V> 1000P
25
VOLOUT1
15 16 17 18 19 20 21 22 23 24
C417 C418
0.033 50V0.15
SA-AK18
40mA
R321
2.7
C312
0.1
C223
50V22
R218
R217
3.3K
68K
C222
470P
C221
0.056
R216
5.6K
R456
4.7K
R453
4.7K
R416 C421
5.6K 0.056
C422
470P
R417
68K
R418
3.3K
C423
50V22