Sharp XL-40H Service Manual page 44

XL-40H/50H
IC801 VHiTA2109F/-1:Servo Pre Amp. (TA2109F)
Pin No. Terminal Name
1 VCC
2 FNI
3 FPI
4 TPI
5 TNI
6 MDI
7 LDO
8 SEL
9 TEB
10 2VRO
11 TEN
12 TEO
13 SBAD
14 FEO
15 FEN
16 VRO
17 RFRP
18 RFIS
19 RFGO
20 RFGC
21 AGCI
22 RFO
23 GND
24 RFN
Input/Output
— Power voltage terminal
Input Main beam amp input terminal
Input Main beam amp input terminal
Input Sub-beam amp input terminal
Input Sub-beam amp input terminal
Input Monitor photodiode amp input terminal
Output Laser diode amp output terminal
Input Laser diode control signal input and APC circuit ON/OFF signal input terminal
Input Tracking error balance adjustment signal input terminal
To be controlled by 3-value PWM signal. (PWM carrier = 88.2 kHz)
Output Standard voltage (2VR) output terminal. When Vcc = 5V, 2VR = 4.2V.
Input Tracking error signal generation amp reversed phase input terminal
Output Tracking error signal generation amp output terminal
Output Sub-beam addition signal output terminal
Output Focus error signal generation amp output terminal
Input Focus error signal generation amp reversed phase input terminal
Output Standard voltage (VR) output terminal. When Vcc = 5V, VR = 2.1V.
Output Track count signal generation amp output terminal
Input RFRP detection circuit input terminal
Output RF signal output terminal
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.
Input RF signal amplitude adjustment amp input terminal
Output RF signal generation amp output terminal
— GND terminal
Input RF reversed phase input terminal
Function
– 44 –