Sony CDP-X3000, Service Manual

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SECTION 5
DIAGRAMS
5-1. IC PIN FUNCTION DESCRIPTION
•
SERVO BOARD IC105 CXD2545Q
(DIGITAL SIGNAL PROCESSOR, FOCUS/TRACKING/SLED SERVO, EFM COMPARATOR)
Pin No. Pin Name I/O Function
1 SRON O Sled servo drive PWM signal output terminal Not used (open)
2 SRDR O Sled servo drive PWM signal (–) output to the BA6297AFP (IC106)
3 SFON O
Sled servo drive PWM signal output terminal Not used (open)
4 TFDR O
Tracking servo drive PWM signal (–) output to the BA6297AFP (IC106)
5 TRON O Tracking servo drive PWM signal output terminal Not used (open)
6 TRDR O
Tracking servo drive PWM signal (+) output to the BA6297AFP (IC106)
7 TFON O
Tracking servo drive PWM signal output terminal Not used (open)
8 FFDR O
Focus servo drive PWM signal (+) output to the BA6297AFP (IC106)
9 FRON O
Focus servo drive PWM signal output terminal Not used (open)
10 FRDR O Focus servo drive PWM signal (–) output to the BA6297AFP (IC106)
11
FFON O Focus servo drive PWM signal output terminal Not used (open)
12 VCOO O Oscillator circuit output terminal for analog PLL of the playback EFM Not used (open)
13 VCOI I Oscillator circuit input terminal for analog PLL of the playback EFM Not used (fixed at “L”)
14 TEST I Input terminal for the test (fixed at “L”)
15 DVSS — Ground terminal (digital system)
16 TES2 I Input terminal for the test (fixed at “L”)
17 TES3 I Input terminal for the test (fixed at “L”)
18 PDO O Charge-pump output terminal for analog PLL of the playback EFM Not used (open)
19 VPCO O PLL charge-pump output terminal for the variable pitch Not used (open)
20 VCKI I Clock signal input from external VCO for the variable pitch Not used (fixed at “L”)
21
AVD2 — Power supply terminal (+5V) (analog system)
22 IGEN I Power supply terminal (+5V) (for operational amplifier)
23
AVS2 — Ground terminal (analog system)
24
(ADIO)ADII I Input terminal for the A/D converter Not used (open)
25 (RFAC)ADIO O Output terminal of the operational amplifier Not used (open)
26
RFDC I RF signal (DC level) input terminal for the digital servo process
27 TE I
Tracking error signal input from the RF amplifier in optical pick-up
28 SE I Sled error signal input from the RF amplifier in optical pick-up
29
FE I Focus error signal input from the RF amplifier in optical pick-up
30
VC I Middle point voltage (+2.5V) input from the RF amplifier in optical pick-up
31
FILO O Filter output terminal for master clock of the playback master PLL
32 FILI I Filter input terminal for master clock of the playback master PLL
33
PCO O Phase comparison output terminal for master clock of the playback EFM master PLL
34
CLTV I Internal VCO control voltage input of the playback master PLL
35 AVS1 — Ground terminal (analog system)
36
RFAC I RF signal (AC level) input terminal for the EFM demodulator
37
BIAS I Constant current input terminal of the playback EFM asymmetry circuit
38 ASYI I Playback EFM asymmetry comparator voltage input terminal
39
ASYO O
Playback EFM full-swing output terminal
40 AVD1 — Power supply terminal (+5V) (analog system)
41 DVDD — Power supply terminal (+5V) (digital system)
42 ASYE I Playback EFM asymmetry circuit on/off selection input terminal (fixed at “H”)
43 PSSL I Audio data output mode selection input terminal (fixed at “L”)