Service manual

MD-MX30/MX30W
– 32 –
Figure 32 BLOCK DIAGRAM (1/5)
23
13
12
9
16
10
15
11
14
3
8
17
5
20
6
19
4
2
21
24
1
5
3
7
8
9
10
6
5
4 3
13
11
12
15
16
19
20
21
17
10
24 23
1
7
13
12
6
9
18
3 4
7
6
2
8
1
5
22
20 21
1
17
8
4
2
18
16
14
15
1 2
3
OUT
BASS TRE
OUT
Function/Volume/Tone
AUDIO
REC
SELO
MDDVDD
TO CD
TO DISPLAY
TO MD
M-COM.CONT.
LINE PULL-UP
POWER
ICU01
LC75341M
AUDIO PROCESSOR
1
4
3
2
VDD
VSS
TUNER
MD/CD
AUX
JTU01
AUX INPUT
+5V BACK UP
+5V(USWD)
MW
MUTE
MO/ST
IO2
ST IND
FM
PD AIN AOUT VSS VDD
IF OUT
CE DI CLK DO
STEREO
ROUT
SD
FM/AM
MO/ST
STEREO
TP301
IC303
LA1832
FM IF DET./
FM MPX./AM IF
AM OSC OUT
AM OSC IN
MO/ST
(FM/AM)
PHASE
FM IN AM IN IF IN
IC302
LC72131
TUNER PLL CONTROLLER
XIN
FE301
FM FRONT END
ANT
VCC
GND GND GND FOUT VT
+5V
VT
Q360
XOUT
4.5MHz
TUNER
TUN MUTE
VCC
Q371
DO
ANTENNA
TERMINAL
FM 75Ω
AM
GND
SO301B
T306
AM
ANT
COIL
AM
OSC
COIL
T302
X352
IF IN FM
VCO
MPX
456KHz
X351 CF351
CF352
AM MIX OUT
AM IF IN
FM/AM OUT AM RF IN
T351
AM IF
FM DET
MPX IN
SWITCHING
FM +B
+B3
+12V
FM/AM
+B3
+5V
VSM
+5V
+5V
SD
TUN MUTE
+B3
+2.7V
DI
CL
CL
V
C
+B3
-B3
+B7
+B8
+B14 +7V(M)
+B12
+5V(SWD)
+6V
TO FAN MOTOR
+B5
+B6
QU07
ICU03
PST9140
RESET
RESET
SWITCHING
SYS-STOP
+5V(D)
+B7
TO DISPLAY SECTIONTO CD SECTION
VOLTAGE
REGULATOR
FM MUTE LEVEL
VR351
VOLTAGE REGULATOR
M
D
V
O
RE
G
CD+7V
-B3
+B3
+B3
+B13
+B4
-1
2
+12V(A)
MDAVCC
VOLTAGE
REGULATOR
IF OUT
LOUT
CF302
CNPU01 TO CNPD01
6
7
8
9
10
11
5
12
4 3 2 1
13
14
15
16
18
17
19
21
22
23
24
25
26
27
28
POWER
QU05 QU06
DIGOUT D.GND DIGIN MD-RESET MD-ST MD-D-STB MD-DATA MD-KDATA MD-SERCH MD-DSCK
D.GND
MDDVDD
+B6
PCONTO
MD-LOADSW
LIN
AAGND
RIN LOUT BACKUP MDAVCC ROUT
AAGND ADGND
CNPU04
CNS8 TO CNP8
TO MD SECTION
+B4
20
+5V
+5V