Philips ACT300, Service Manual

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PIN DESCRIPTION OF INTEGRATED CIRCUITS
TZA1024 – HF-PREAMPLIFIER AND LASER SUPPLY CIRCUIT
Pin Name Direction Description
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
1 LD HF-preamp
→
CD-drive current output to laser diode
2 VCCL +2.6V 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 +2.6V / 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 +2.6V supply voltage
14 RGADJ GND external laser supply gain adjust resistor
SC111259AFTA – SERVO DRIVER & POWER MANAGEMENT IC
Pin Name Direction Description
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
1 SLEEP µP → servo driver sleep input
2 WAKE µP
→
servo driver wake input
3 VR +VR reference voltage input (motor driver)
4 ERR4 CD10
→
servo driver control signal input (slide error signal)
5 CF4
→
servo driver phase correction capacitor connect (CH4)
6 CF3 → servo driver phase correction capacitor connect (CH3)
7 ERR3 CD10
→
servo driver control signal input (radial error signal)
8 ERR2 DSP/µP
→
servo driver control signal input (disc speed error signal)
9 CF2
→
servo driver phase correction capacitor connect (CH2)
10 CF1
→
servo driver phase correction capacitor connect (CH1)
11 ERR1 CD10 → servo driver control signal input (focus error signal)
12 OUT1A servo driver
→
CD-drive positive drive output (CH1)
13 PGND1 GND H-bridge driver ground
14 OUT1B servo driver
→
CD-drive negative drive output (CH1)
15 VIN12 +A CH1 and CH2 H-bridge driver supply voltage
16 OUT2B servo driver → CD-drive negative drive output (CH2)
17 PGND2 GND H-bridge driver ground
18 OUT2A servo driver
→
CD-drive positive drive output (CH2)
19 OUT3A servo driver
→
CD-drive positive drive output (CH3)
20 PGND2 GND H-bridge driver ground
21 OUT3B servo driver → CD-drive negative drive output (CH3)
22 VIN34 +A CH3 and CH4 H-bridge driver supply voltage
23 OUT4B servo driver
→
CD-drive negative drive output (CH4)
24 PGND4 GND H-bridge driver ground
25 OUT4A servo driver
→
CD-drive positive drive output (CH4)
26 VG servo driver → charge pump output
27 C2H
→
servo driver charge pump capacitor connect
28 C1H
→
servo driver charge pump capacitor connect
29 C1L
→
servo driver charge pump capacitor connect
30 C2L
→
servo driver charge pump capacitor connect
31 VIN battery → servo driver battery supply voltage
32 RSTB servo driver
→
reset block output
33 CHGSW servo driver
→
charge circuit transistor drive output for battery charger
34 RS charge circuit
→
servo driver OpAmp non-inverting input for battery charger
35 INM2
→
servo driver error amplifier inverting input
36 RF2 → servo driver error amplifier output
37 DCIN +DC DC power supply from AC/DC adaptor
38 VDET servo driver
→
DCIN over voltage and VIN low voltage detect output
39 VREF servo driver
→
Voltage reference circuit output
40 DTC
→
servo driver max. duty control voltage input for power management
41 VOUT servo driver → DC/DC converter PWM output for power management
42 VC
→
servo driver power management power supply
43 CGND GND internal ground
44 RF1 servo driver
→
OpAmp output for power management
45 INM1
→
servo driver OpAmp inverting input for power management
46 CLK → servo driver clock input
47 OE DSP
→
servo driver output enable for motor drivers
48 CHGON µP
→
servo driver charge enable for battery charger
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