19
20
21
22
23
AM
MIX
12
LEVEL
DET.
FM IF
S-
CURVE
2
3
REG
4
13
AGC
COMP.
6
8
1
10
AM
RF
AMP
AM
IF
AM/FM
IF
BUFF.
24
1
FM
DET.
AM
OSC
BUFF.
ALC
TUNING
DRIVE
18
FM ANT
RF AMP
FM MIXER
LOCAL OSC
9
Vcc
+B(FM)
FM IF
AMP
+B3
AM
IFT
1
20
7.2MHz
XIN
XOUT
SWALLOW COUNTER
1/6,1/17 4bit
12 BIT
PROGRAMMABLE
DIVIDER
CE
2
3
DI
4
CL
D0
5
9
8
7
10
STRQ
SDC
FM
15
V
DD
16
PD
IFIN
11
LW
1/2
14
13
FM IN
AM IN
+B3
+B5
+B(FM)
SD
PLLCE
PLLDT
DO
STEREO
SW
17
LA1833MN
FM / AM I F AMP,
DET / AM OSC,
MIX / FM MPX
15
PILOT
CANCEL
16
VCO
FF
FF
FF
AM
DET.
DECODER
AM
6
MONO
12
19
Vss
POWER
ON
RESET
LC72131M
PLL
FREQUENCY
SYNTHESIZER
+B3
GND
5
7
ST
MONO
FM/AM
SD
FMDET
FM IF
IN
OSC
OUT
AFC
OSC
AM RF
IN
AGC
AM
OUT
DET
OUT
PILOT
IN
MPX
IN
PILOT
OUT
Lch
14
Rch
17
18
AIN
AOUT
AM ANT
+B3
STRQ
AM IF
IN
AM
MIX
OUT
Rch
A
IFT
+B(FM)
+B(FM)
+B(FM)
•
MAIN SECTION
BUFFER
AMP
AM
ANT
COIL
AM
OSC
COIL
PHASE
DET.
PILOT
DET.
PHASE DETECTOR
CHARGE PUMP
REFERENCE
DIVIDER
UNIVERSAL
COUNTER
DATA SHIFT REGISTER
LATCH
POWER
SUPPLY
(FM:ON)
19
SA-AK78
Summary of Contents for SA-AK78
Page 6: ......
Page 7: ...7 SA AK78 ...
Page 34: ...34 SA AK78 ...
Page 57: ...16 Wiring Connection Diagram 57 SA AK78 ...
Page 58: ...58 SA AK78 ...
Page 59: ...17 Troubleshooting Guide 59 SA AK78 ...
Page 61: ...18 1 1 Deck Mechanism Parts Location 18 1 Mecanismo do Deck Montado RD JMD034 Z 61 SA AK78 ...
Page 62: ...62 SA AK78 ...
Page 64: ...18 2 CD Loading Mechanism RD DAC024 Z 18 2 1 CD Loading Mechanism Parts Location 64 SA AK78 ...
Page 65: ......
Page 67: ...18 3 1 Cabinet Parts Location 18 3 Cabinet 67 SA AK78 ...
Page 68: ...68 SA AK78 ...
Page 69: ......