Sharp CD-MPS900 Service Manual download pdf (Page 78)

CD-MPS900/CD-MPS99

8 – 1

AudioCD-MPS900/CD-MPS99Service ManualCD-MPS900/CD-MPS99MarketE

CHAPTER 8. OTHERS

[1] Function table of IC

IC1 VHiLC78648E-1: CD Servo (LC78648E) (1/2)

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

Pin No. Terminal Name Input/Output Setting in Reset Function

1 AVDD1 Output — Analog power supply pin 1.

2 SLCO Output —

slice level con-

trol.

Slice level Control output pin.

3 EFMIN Input — RF signal input pin.

4 RF Output — RF signal Output pin.

5 LPF Output — RF signal DC level detection LPF capacitor connection pin.

6 JITTC Input — Jitter detection capacitor connection pin.

7 AIN Input — A signal input pin.

8 CIN Input — C signal input pin.

9 BIN Input — B signal input pin.

10 DIN Input — D signal input pin.

11 FEC Output FE signal LPF capacitor connection pin.

12* PHLPF/RFMON Output ZHI Reference supply setting terminal.

13 VREF Output AVDD1/2 VREF voltage output pin.

14 EIN Input — E signal input pin.

15 FIN Input F signal input pin.

16 TEC Output TE signal LPF capacitor connection pin.

17 TE Output — TE signal output pin.

18 TEIN Input — TES signal generation TE signal input pin

19 LDD Output — Laser power control signal output pin.

20 LDS Input — Laser power control signal input pin.

21 FDO Output ADAVDD/2 Focus control output pin. D/A output.

22 TDO Output ADAVDD/2 Tracking control output pin. D/A output.

23 SLDO Output ADAVDD/2 Thread control output pin. D/A output.

24 SPDO Output ADAVDD/2 Spindle control output pin. D/A output.

25 AVSS2 — — Analog GND pin 2. Must always be connected to 0 V.

26 AVDD2 — — Analog power supply pin 2.

27 DVDD — — Digital power supply pin.

28 DVSS — — Digital GND pin 2. Must always be connected to 0 V.

29* VPB Output H Rough servo/phase control automatic switching monitor output pin.“H” for rough

servo and “L” for phase servo.

30* DEFECT Output L Defect signal output pin.

31* FSEQ Output L Synchronization signal detection output pin.

Outputs a high level when the Synchronization signal detection from the EFM sig-

nal and the internally generated Synchronization signal agree.

32 EFLG Output L C1, C2 error correction monitor pin

33* FSX Output L 7.35 kHz Synchronization signal output pin.

CLV playback mode.

34 CONT1 Input/Output Input General pur-

pose I/O pin 1.

Controlled by command from the microprocessor. Any of these

that are unused must be either set up as input pin ports and

connected to 0 V, or set up as output pin ports and left open.

35 CONT2 Input/Output Input General pur-

pose I/O pin 2.

36 CONT3 Input/Output Input General pur-

pose I/O pin 3.

37* MONI1 Input/Output Input External deiemphasis setting pin, INternal signal monitor pin 1. Controlled by

microprocessor.

38* MONI2 Output L Internal signal monitor pin 2.

39* DOUT Output L Digital OUT output Pin. (EIAJ format)

40 TEST Input L Test input pin. Must always be connected to 0 V.

41 LVDD — —

Left channel

D/A converter

L channel Power supply pin.

42 LCHO Output LVDD/2 L channel output supply pin.

43 LRVSS — — LR channel GND pin. Must always be connected to 0 V.

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Sharp CD-MPS900 Service Manual Page 78

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