Sony HCD-C770 - Hi Fi Components, Руководство по обслуживанию

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90
HCD-C770/C990
• DVD BOARD IC401 CXD3068Q (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR)
Pin No. Pin Name I/O Description
1 DVDD0 —
Power supply terminal (+3.3V) (digital system)
2 XRST I
Reset signal input from the mechanism controller “L”: reset
3 MUTE I
Muting on/off control signal input from the mechanism controller “H”: muting on
4 DATA I
Serial data input from the mechanism controller
5 XLAT I
Serial data latch pulse signal input from the mechanism controller
6 CLOK I
Serial data transfer clock signal input from the mechanism controller
7 SENS O
Internal status (SENSE) signal output to the mechanism controller
8 SCLK I
SENSE serial data reading clock signal input from the mechanism controller
9 ATSK I/O
Input/output terminal for anti-shock Not used
10 WFCK O
Write frame clock signal output to the DVD decoder
11 RFCK O
RFCK signal output terminal Not used
12 XPCK O
XPCK signal output terminal Not used
13 GFS O
Guard frame sync signal output to the mechanism controller
14 C2PO O
C2 pointer signal output to the DVD decoder
15 SCOR O
Subcode sync (S0+S1) detection signal output to the DVD decoder and mechanism controller
16 C4M O
4.2336 MHz clock signal output terminal Not used
17 WDCK O
Guard subcode sync (S0+S1) detection signal output to the DVD decoder
18 DVSS0 —
Ground terminal (digital system)
19 COUT O
Numbers of track counted signal output to the mechanism controller
20 MIRR O
Mirror signal output to the mechanism controller
21 DFCT I/O
Defect signal input/output terminal Not used
22 FOK O
Focus OK signal output to the mechanism controller
23 PWMI I
Spindle motor external control signal input terminal Not used
24 LOCK O
GFS is sampled by 460 Hz “H” output when GFS is “H”
25 MDP O
Spindle motor servo drive signal output to the DVD decoder
26 SSTP I
Detection signal input from limit in switch The optical pick-up is inner position when “H”
27 FSTO O
2/3 divider output terminal Not used
28 DVDD1 —
Power supply terminal (+3.3V) (digital system)
29 SFDR O
Sled servo drive PWM signal (+) output
30 SRDR O
Sled servo drive PWM signal (–) output
31 TFDR O
Tracking servo drive PWM signal (+) output
32 TRDR O
Tracking servo drive PWM signal (–) output
33 FFDR O
Focus servo drive PWM signal (+) output
34 FRDR O
Focus servo drive PWM signal (–) output
35 DVSS1 — Ground terminal (digital system)
36 TEST I Input terminal for the test
37 TES1 I Input terminal for the test
38 VC I Middle point voltage (+1.65V) input terminal
39 FE I Focus error signal input from the DVD/CD RF amplifier
40 SE I Sled error signal input from the DVD/CD RF amplifier
41 TE I Tracking error signal input from the DVD/CD RF amplifier
42 CE I Middle point servo analog signal input
43 RFDC I RF signal input from the DVD/CD RF amplifier
44 ADIO O Output terminal for the test Not used
45 AVSS0 — Ground terminal (analog system)
46 IGEN I Stabilized current input for operational amplifiers