Goldstar FFH-295AX, FFH-293AX, FFH-1920 block diagram
- 2-37 -
INTERNAL BLOCK DIAGRAM OF ICs
■ BU1923/BU1923F
RDS/RBDS decoder
- 2-38 -
• Internal circuit configuration
■ BA3126N
2-channel head switch for radio cassette recoreders
■ BU2090F
-12 -bit, Serial IN, parallel OUT driver
Control circuit
12-bit shift register
Latch
VSS
2
1
3
4
5
6
7
8
DATA
CLOCK
Q0
Q1
Q2
Q3
Q4
16
15
14
13
12
11
10
9
VDD
Q11
Q10
Q9
Q8
Q7
Q6
Q5
Output buffer
(open drain)
- 2-39 -
+5V
18K15K
IN (L)
1µF
15K 1µF
MUTE/
ST-BY
GND
IN (R)
1µF
4.7Ω
4.7Ω
100nF
100nF
OUT (L)
OUT (R)
1000µF
1000µF
+V
S
3
5
7
9
6
11
2
4+
+
-
-
D94AU085
RL (L)
RL (R)
-V
S
µP
560Ω
18K
IN- (L)8
10 IN- (R)
1
560Ω
18K
■ TDA7265
■ BA3308
Dual preamplifier with ALC
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