Teac MC-D90 - TA2109 F RF;DIGITAL SERVO IC

SERVICE MANUAL
11
TA2109F (RF/DIGITAL SERVOR)
PIN No. NAME I/O DESCRIPTION REMARK
VCC
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEB
2VRO
TEN
TEO
SBAD
FEO
FEN
VRO
RFRP
RFIS
RFGO
RFGC
AGCI
RFO
GND
RFN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Power supply input terminal
Main beam I-V amp input terminal
Main beam I-V amp input terminal
Sub beam I-V amp input termianl
Sub beam I-V amp input termianl
Monitor phono diode amp input terminal
Laser diode amp output terminal
Laser diode control signal input terminal and APC
circuit ON/OFF control signal input terminal
Tracking error balance adjustment signal input
terminal. Controlled by 3 PWM signal
(PWM carrier = 88.2 kHz)
Reference voltage (2 VREF) output terminal
2
VREF = 4.2V when VCC = 5V
TE amp negative input terminal
TE error signal output terminal
Sub beam adder signal output terminal
Focus error signal output terminal
FE amp negative input terminal
Reference voltage (V
REF) output terminal
V
REF = 2.1V when VCC = 5V
Track count signal output terminal
RFRP detect circuit input terminal
RF gain signal output terminal
RF amplitude adjustment control signal input
terminal. Controlled by 3 PWM signal
(PWM carrier = 88.2 kHz)
RF signal amplitude adjustment amp input terminal
RF signal output terminal
Ground terminal
RF amp negative input terminal
-
Connected to pin diode A,C
Connected to pin diode B,D
Connected to pin diode F
Connected to pin diode E
Connected to monitor photo
diode
Connected to laser control circuit
3 signal input (V
CC, Hi-Z, GND)
3 signal input (2 V
REF, VR, GND)
-
Connected to TEO through
feedback register
-
-
-
Connected to FEO through
feedback register
-
-
Connected to RFO through
condenser
-
3 signal input (2
VREF
, VR, GND)
Connected to RFO through
condenser
-
-
-
-
I
I
I
I
I
O
I
I
O
I
O
O
O
I
O
O
I
O
I
I
O
-
I
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