JVC KD-S821R Service Manual page 26

KD-S821R
TA2109F-X (IC521) : RF amp.
1. Pin layout
24
1
2. Block diagram
SBAD
13
FEO
14
FEN
15
VRO
16
RFRP
17
RFIS
18
RFGO
19
RFGC
20
AGCI
21
re=130 ohm
RFO
22
GND
23
RFN
24
3. Pin function
Pin
Symbol I/O
No.
1 Vcc - Power supply input terminal
2 FNI I Main beam I-V amp input terminal
3 FPI I Main beam I-V amp input terminal
4 TPI I Sub beam I-v input terminal
5 TNI I Sub beam I-V input terminal
6 MDI I Monitor photo diode amp input terminal
7 LDO O Laser diode amp output terminal
8 SEL I Laser diode control signal input terminal
9 TEB I T. error balance adj. signal input terminal
10 2VRO O Reference voltage output terminal
11 TEN I TE amp negative input terminal
12 TEO O TE error signal output terminal
1-26
13
12
15k ohm
15k ohm
20uA
50k ohm
36pF 10k ohm
7.96k ohm
10k ohm
21k ohm
21k ohm
50uA
20k ohm
12k ohm
12k ohm
20k ohm
PEAK
BOTTOM
23.5k ohm
12k ohm
1.53k ohm
3.3k ohm
3.3k ohm
Pin function
30k ohm
7.67k ohm
10k ohm
10k ohm
30k ohm
10k ohm
21k ohm 29k ohm
24k ohm 24k ohm
3 STATE
47k ohm
1.74k ohm
SW2
SW3
180k ohm
13k ohm
20pF
180k ohm
20pF
20k ohm
180k ohm
40pF
60k ohm
20k ohm
60k ohm
180k ohm 40pF
Pin
Symbol I/O
No.
13 SBAD O Sub beam adder signal output terminal
14 FEO O Focus error signal output terminal
15 FEN I FE amp negative input terminal
16 VRO O Reference voltage (VREF) output terminal
17 RFRP O Track count signal output terminal
18 RFIS I RFRP detect circuit input terminal
19 RFGO O RF gain signal output terminal
20 RFGC I RF amplitude adj. control signal input terminal
21 AGCI I RF signal amplitude adj. amp input terminal
22 RFO O RF signal output terminal
23 GND - Ground terminal
24 RFN I RF amp negative input terminal
TEO
12
20pF
TEN
11
2VRO
10
TEB
9
DET.
SEL
SW1
8
LDC
LDO
1k ohm
7
680 ohm
MDI
6
2.12k ohm
TNI
I-I 5
TPI
I-I 4
FPI
3
20k ohm
FNI
2
20k ohm
Vcc
1
Pin function