Sharp DV-550U, Service Manual

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DV-550U
12-4. IC707 IX1473GE
SERVO PROCCESSOR
Pin No. Terminal name I/O Operation function Remarks
1 VSS – Digital ground terminal.
2 BCK O Bit clock (1.4122MHz) output terminal.
3 AOUT O Audio data output terminal.
4 DOUT O Digital out output terminal.
5 MBOV O Buffer memory over signal output terminal. Over: “H”
6 IPF O Correction flag output terminal. When correction disable symbol
is given if AOUT output is C2 correction: “H”.
7 SBOK O Sub-code Q data CRCC judgment result output terminal.
Judgment result OK: “H”.
8 CLCK I/O Sub-code P to W data read clock output/input terminal.
Selectable with command bit.
9 VDD – D power terminal
10 VSS – Digital ground terminal
11 DATA O Sub code P-W data output terminal.
12 SFSY O Playback system frame sync signal output terminal.
13 SBSY O Subcode block sync output terminal.
When subcode sync is detected, S1 position: “H”.
14 SPCK O Processor status signal read clock (176.4 kHz) output terminal.
15 SPDA O Processor status signal output terminal.
16 COFS O Correction system frame clock (7.35 kHz) output terminal.
17 MONIT O LSI internal signal monitor terminal.
DSP internal flag and PLL system clock can be monitored with
microcomputer command.
18 VDD – D power terminal.
12-4
Pin No. Terminal name I/O Operation function
45 EQIN I DVD/CD-EQ input.
46 EQOUT O Output after passing of RFNIN and RFPIN VCA.
47 DVDsel I DVD/CD selection control input. H:CD L: DVD (PNP open space)
48 RFGain I RF signal VCA control input.
49 VCC3 – RF system VCC.
50 MDIN I Laser diode APC monitor input.
51 LDC I LD ON/OFF control input. H:ON, L:OFF
52 LDOUT O LD external current driver control output.
53 LDPsel I APC control polarity selection input. H: Positive polarity L: Negative polarity.
54 RFPIN I RF signal nonreverse input from PU.
55 RFNIN I RF signal reverse input from PU.
56 VCC1 – Servo system VCC.
57 AIN I Main beam 4-division detector A input for focus error (FE) generation.
58 BIN I Main beam 4-division detector B input for focus error (FE) generation.
59 CIN I Main beam 4-division detector C input for focus error (FE) generation.
60 DIN I Main beam 4-division detector D input for focus error (FE) generation.
61 VrefIN I 2.1V reference voltage potential input.
62 EIN I Sub-bean E input.
63 FIN I Sub-bean F input.
64 S/Dsel I Single/double layer system selection input. H: Double layer, L: Single layer