Ic Pin Function Description; Waveforms - Sony CDP-XA50ES Service Manual

• Waveforms

– SERVO Section –
1 IC101 @§ (RFDC) 200 mV/DIV, 500 ns/DIV 6 IC101 $¶ (BLCK)
+0.25
1.2 Vp-p
–0.20
7 IC101 ^™ (XTAI)
2 IC101 @¶ (TE) 200 mV/DIV, 100 µs/DIV
Approx. 400 mVp-p
3 IC101 @ª (FE) 200 mV/DIV, 50 ns/DIV 8 IC101 (§ (MDP)
Approx. 200 mVp-p
4 IC101 #§ (RFAC) 200 mV/DIV, 500 ns/DIV 9 IC201 #¡ (XTALI)
+0.25
1.2 Vp-p
–0.20
5 IC101$∞ (LRCK)
5.2 Vp-p
22.7 s
– AUDIO Section –
1 IC602 1
5.2 Vp-p
16.9344 MHz
474 ns
2 IC602 6
5.2 Vp-p
16.9344 MHz
180 ns
3 IC603 0 (XIN)
2.8 Vp-p
22 ns
8 ns
4 IC604 3
4.8 Vp-p
4 MHz 45.159 MHz
5 IC610 1 (CK)
44 ns
– 53 –

6-9. IC PIN FUNCTION DESCRIPTION

SERVO BOARD IC101 CXD2545Q
(DIGITAL SIGNAL PROCESSOR, FOCUS/TRACKING/SLED SERVO, EFM COMPARATOR)
Pin No. Pin Name I / O
1 SRON O Sled servo drive PWM signal output terminal
2 SRDR O
Sled servo drive PWM signal (–) output to the BA6297AFP (IC102)
3 SFON O Sled servo drive PWM signal output terminal
4 TFDR O Tracking servo drive PWM signal (–) output to the BA6297AFP (IC102)
1.8 Vp-p
5 TRON O
Tracking servo drive PWM signal output terminal
6 TRDR O
Tracking servo drive PWM signal (+) output to the BA6297AFP (IC102)
7 TFON O
Tracking servo drive PWM signal output terminal
8 FFDR O
Focus servo drive PWM signal (+) output to the BA6297AFP (IC102)
9 FRON O
Focus servo drive PWM signal output terminal
10 FRDR O Focus servo drive PWM signal (–) output to the BA6297AFP (IC102)
11
FFON O Focus servo drive PWM signal output terminal
12
VCOO O Oscillator circuit output terminal for analog PLL of the playback EFM
13 VCOI I Oscillator circuit input terminal for analog PLL of the playback EFM
4.8 Vp-p
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
19 VPCO O PLL charge-pump output terminal for the variable pitch
20 VCKI I Clock signal input from external VCO for the variable pitch
21
AVD2 — Power supply terminal (+5V) (analog system)
22
IGEN I Power supply terminal (+5V) (for operational amplifier)
23 AVS2 — Ground terminal (analog system)
4.8 Vp-p
24 ADII I Input terminal for the A/D converter
25
ADIO O Output terminal of the operational amplifier
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
840 mVp-p
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")
4 Vp-p
43 PSSL I Audio data output mode selection input terminal (fixed at "L")
Function
Not used (open)
Not used (open)
Not used (open)
Not used (open)
Not used (open)
Not used (open)
Not used (open)
Not used (fixed at "L")
Not used (open)
Not used (open)
Not used (fixed at "L")
Not used (open)
Not used (open)
– 54 –