Goldstar ffh-313, ffh-315 Service Manual
INTERNAL BLOCK DIAGRAM OF ICs
LA1831
Pre Out
Ch2
3.3µF
3.3µF
3.3µF
3.3µF
3.3µF
1000µF
1000µF
47µF
47µF
47µF
0.018µF
1000µF
3.3µF
47µF
1.2µF
100
µF
R . R
Vcc
1000
µF
47µF
0.018µF
10kΩ
10kΩ
150kΩ
150kΩ
1MΩ
2.2kΩ
2.2kΩ
Rec IN
Ch2
Rec
IN
Rec IN
Ch1
ALC
Rec Out
Ch2
180kΩ
180kΩ
Gv
Gvo
180kΩ
180kΩ
1kΩ
1kΩ
1kΩ
1kΩ
100kΩ
100Ω
10kΩ
10kΩ
10Ω
300kΩ
9.1kΩ
100Ω
Pre IN
Ch2/B
(Play Rec)
Pre IN
Ch2/A
(Play only)
Pre IN
Ch1/B
(Play Rec)
Pre Out
Ch1
Pre IN
Ch1/A
Ch1/B
NF
Ch2/A
Ch1/A
Ch1/B
Gvo
Gv
Gvo
Gv
Vcc
M
N
NF
NF
Ch1
Ch1
Ch2
Gvc
GV
Ch2
ALC
GND
Rec
15
14
13
12
11
23
24
1
2
161718192122
IN
Vref1
Vref
Vref2
A/B
Metal
Out
Pre
Out
REC
Out
Rec Out
Ch1
Mix
Out
GND1 M/N
6.8kΩ
A
B
1000pF
1000pF
6.8kΩ
9.1kΩ
20
10 987643 5
M/N
REC SW REC SWGND P/B SW P/B SWCONT GND GNDV
CC
1 2 3 4 5 6 7 8 9
KA3082
1 2 3 4 5 6 7 8 9 10 11 12
24
ALC
BUFF
LEVEL
DET
AM/FM
IF
BUFF
AM/FM
SW
STEREO
SW
PILOT
DET
S-CURVE
FM
IF
FM
DET
TUNING
DRIVE
REG
GND
VCC
VCO
FF FF
DECODER
MUTE
TRIG
STEREO DRIVE
FF
PHASE DET
FM
AM
COMP
AM
OSC
AM
MIX
AM
RF-AMP
AM
DET
AM
IF
AGC
23 22 21 20 19 18 17 16 15 14 13
KIA6289N
- 26 -
- 27 -
KA8301
KIA7805 P/PI ~ KIA7824P/PI
DRIVER
PRE
LOGIC
2 3 4 5 6 7 8 9 101
GND
Vout1
Vz1VrFin
Rin
Vcc1
Vcc2
Vz2
Vout2
3
1
2
4
R
12
R
1
C
21
R
12
Q
1
Q
7
Q
13
Q
10
Q
6
Q
5
Q
4
Q
3
Q
11
Q
15
Q
14
Q
9
Q
8
Q
16
Q
17
Q
INPUT
OUTPUT
GND
2
Q
1
Z
18
R
8
R
9
R
13
R
11
R
17
R
5
R
6
R
1
R
2
R R
16
R
20
R
19
R
14
R
10
R
7
R
- 28 -
LC7273M
TDA7440D
+5V
+5V
VREF
CINFLOUTVREF
Vdda
Vssa
MPXIN
TEST
XIN XOUT
Vssd
Vddd
RDCL
RDDA
MODE
RST
RDS-ID
READY
CLK(4.332MHz)
SMOOTHING
FILTER
OSC
PLL
(57kHz)
DATA
DECODER
RAM
(128bit)
RDS-ID
DETECT
CLOCK
RECOVERY
(1187.5Hz)
ANTIALIASING
FILTER
REFERENCE
VOLTAGE
57kHz
BPF
(SCF)
TEST
L-IN1
100K
100K
100K
100K
100K
100K
100K
100K
4 8 9 18
27
21
22
20
26
24
25
LOUT
SCL
SDA
DIG_GND
ROUT
V
S
AGND
R
B
R
B
14 15
10 11 19 12 13 23
5
G
G
6
7
3
2
INPUT MULTIPLEXER
+GAIN
MUXOUTR INR TREBLE(R) BIN(R) BOUT(R) CREF D98AU883
0/30dB
2dB STEP
MUXOUTL
VOLUME TREBLE
I CBUS DECODER + LATCHES
BASS
SPKR ATT
LEFT
VOLUME TREBLE BASS
SUPPLY
V
REF
SPKR ATT
RIGHT
INL TREBLE(L) BOUT(L)BIN(L)
1
28
L-IN2
L-IN3
L-IN4
R-IN1
R-IN2
R-IN3
R-IN4
2
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