Read Sharp XL-70 (serv.man19) Service Manual online
– 47 –
XL-60H/70H
IC801 VHiTA2109F/-1:Servo Pre Amp. (TA2109F)
1
VCC
—
Power voltage terminal
2
FNI
Input
Main beam amp input terminal
3
FPI
Input
Main beam amp input terminal
4
TPI
Input
Sub-beam amp input terminal
5
TNI
Input
Sub-beam amp input terminal
6
MDI
Input
Monitor photodiode amp input terminal
7
LDO
Output
Laser diode amp output terminal
8
SEL
Input
Laser diode control signal input and APC circuit ON/OFF signal input terminal
9
TEB
Input
Tracking error balance adjustment signal input terminal
To be controlled by 3-value PWM signal. (PWM carrier = 88.2 kHz)
To be controlled by 3-value PWM signal. (PWM carrier = 88.2 kHz)
10
2VRO
Output
Standard voltage (2VR) output terminal. When Vcc = 5V, 2VR = 4.2V.
11
TEN
Input
Tracking error signal generation amp reversed phase input terminal
12
TEO
Output
Tracking error signal generation amp output terminal
13
SBAD
Output
Sub-beam addition signal output terminal
14
FEO
Output
Focus error signal generation amp output terminal
15
FEN
Input
Focus error signal generation amp reversed phase input terminal
16
VRO
Output
Standard voltage (VR) output terminal. When Vcc = 5V, VR = 2.1V.
17
RFRP
Output
Track count signal generation amp output terminal
18
RFIS
Input
RFRP detection circuit input terminal
19
RFGO
Output
RF signal output terminal
20
RFGC
Input
RF amplitude adjustment control signal input terminal
The amplitude of RF signal can be controlled by using the 3-value PWM signal (PWM
carrier = 88.2 kHz) which is output from the RFGC terminal of TC9432F.
The amplitude of RF signal can be controlled by using the 3-value PWM signal (PWM
carrier = 88.2 kHz) which is output from the RFGC terminal of TC9432F.
21
AGCI
Input
RF signal amplitude adjustment amp input terminal
22
RFO
Output
RF signal generation amp output terminal
23
GND
—
GND terminal
24
RFN
Input
RF reversed phase input terminal
Terminal Name
Pin No.
Input/Output
Function
IC801 VHiTA2109F/-1:Servo Pre Amp. (TA2109F)
Figure 47 BLOCK DIAGRAM OF IC
15k
Ω
15k
Ω
50k
Ω
10k
Ω
7.96k
Ω
10k
Ω
21k
Ω
21k
Ω
12k
Ω
12k
Ω
20k
Ω
20k
Ω
23.5k
Ω
12k
Ω
1.53k
Ω
20k
Ω
3.3k
Ω
180k
Ω
60k
Ω
60k
Ω
20k
Ω
20k
Ω
20k
Ω
180k
Ω
180k
Ω
180k
Ω
13k
Ω
2.12k
Ω
680k
Ω
1k
Ω
47k
Ω
1.74k
Ω
24k
Ω
30k
Ω
24k
Ω
21k
Ω
29k
Ω
10k
Ω
7.67k
Ω
30k
Ω
10k
Ω
10k
Ω
20k
Ω
3.3k
Ω
20pF
20pF
40pF
20pF
40pF
36pF
10pF
PEAK
BOTTOM
re = 130
Ω
SW
3
SW
2
SW
1
65
µ
A
50
µ
A
20
µ
A
2
3
4
5
1
7
8
9
6
12
13
14
15
11
17
18
19
10
16
22
23
24
21
20
VCC
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEB
2VRO
TEN
TEO
RFN
GND
RFO
AGCI
RFGC
RFGO
RFIS
RFRP
VRO
FEN
FEO
SBAD
3 STATE
DET.
I . I
I . I
SEL
L
HiZ
H
SW1
SW2
LDC
SW3
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
LDC
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