Philips AZT9240 Service Manual page 12

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