Philips AZT9240, Руководство по обслуживанию, Страница: 12 / 37

PIN DESCRIPTION OF INTEGRATED CIRCUITS
TZA1024 – HF-PREAMPLIFIER AND LASER SUPPLY CIRCUIT
Pin Name Direction Description
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1 LD HF-preamp
→
CD-drive current output to laser diode
2 VCCL +2.7 laser supply voltage
3 CFIL
→
HF-preamp external filter capacitor
4 MON CD-drive
→
HF-preamp laser monitor diode input
5 DIN CD-drive
→
HF-preamp central diode input
6 GND GND ground
7 PWRON CD10
→
HF-preamp power-on select input
8 CMFB +2.7 / 2 common mode feedback voltage input
9 RFFB
→
HF-preamp external RF feedback resistor
10 RFEQO HF-preamp
→
RF amplifier output
11 CDRW CD10
→
HF-preamp gain select input for CDDA/CDRW
12 EQSEL CD10
→
HF-preamp equalizer/speed select input
13 VCC2 +2.7 supply voltage
14 RGADJ GND external laser supply gain adjust resistor
MPC17A51VM – 4-CHANNEL H-BRIDGE SERVODRIVER
Pin Name Direction Description
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
1 VG servo driver
→
charge pump output, supply for pre-driver circuit
2 DGND GND digital ground for control circuit
3 CLK
→
servo driver clock signal input
4 OE
→
servo driver output enable
5 VLG +2.7 power supply input for control circuit
6 VIN12 +A power supply input for CH1 and CH2 H-bridge driver block
7 OUT1A servo driver
→
focus actuator CH1 H-bridge output A
8 PGND1 GND power ground for CH1 H-bridge driver block
9 OUT1B servo driver
→
focus actuator CH1 H-bridge output B
10 OUT2B servo driver
→
track actuator CH2 H-bridge output B
11 PGND2 GND power ground for CH2 H-bridge driver block
12 OUT2A servo driver
→
track actuator CH2 H-bridge output A
13 VIN1-2 +A power supply input for CH1 and CH2 H-bridge driver block
14 CF2
→
servo driver CH2 capacitor connection for phase compensation
15 ERR2 CD10
→
servo driver CH2 error level input (radial error signal)
16 ERR1 CD10
→
servo driver CH1 error level input (focus error signal)
17 CF1
→
servo driver CH1 capacitor connection for phase compensation
18 VR +1.4 reference voltage input
19 AGND GND analog ground for control circuit
20 CF3
→
servo driver CH3 capacitor connection for phase compensation
21 ERR3 CD10
→
servo driver CH3 error level input (slide error signal)
22 ERR4 CD10/µP
→
servo driver CH4 error level input (disc motor speed error signal)
23 CF4
→
servo driver CH4 capacitor connection for phase compensation
24 VIN3-4 +A power supply input for CH3 and CH4 H-bridge driver block
25 OUT4A servo driver
→
disc motor CH4 H-bridge output A
26 PGND4 GND power ground for CH4 H-bridge driver block
27 OUT4B servo driver
→
disc motor CH4 H-bridge output B
28 OUT3B servo driver
→
slide motor CH3 H-bridge output B
29 PGND3 GND power ground for CH3 H-bridge driver block
30 OUT3A servo driver
→
slide motor CH3 H-bridge output A
31 VIN34 +A power supply input for CH3 and CH4 H-bridge driver block
32 VCG +2.7 power supply input for charge pump circuit
33 C2L
→
servo driver capacitor connection for charge pump
34 C1L
→
servo driver capacitor connection for charge pump
35 C1H
→
servo driver capacitor connection for charge pump
36 C2H
→
servo driver capacitor connection for charge pump
3-1
CS 46 752