Aiwa XR-M171 Service Manual download pdf (Page 29)

1 DEFI I Defect detection signal (DEF) input.

2 TAI I Test input. A pull-down resistor is built in. Must be connected to 0V.

3 PDO O External VCO control phase comparator output.

4 VVSS – Internal VCO ground. Must be connected to 0V.

5 ISET O PDO output current adjustment resistor connection.

6 VVDD – Internal VCO power supply.

7 FR – VCO frequency range adjustment.

8 VSS – Digital system ground. Must be connected to 0V.

9 EFMO O Slice level control; EFM signal output.

10 EFMIN I Slice level control; EFM signal input.

11 T2 I Test input. A pull-down resistor is built in. Must be connected to 0V.

12 CLV+

Disc motor control output.

13 CLV–

Three-value ouput is also possible when specified by microprocessor command.

14 V/P O

Rough servo/phase control automatic switching monitor output. Outputs a high level

during rough servo and a low level during phase control.

15 HFL I Track detection signal input. This is a Schmitt input.

16 TES I Tracking error signal input. This is a Schmitt input.

17 TOFF O Tracking off output.

18 TGL O Tracking gain switching output. Increase the gain when low.

19 JP+

Track jump output.

20 JP–

Three-value output is also possible when specified by microprocessor command.

21 PCK O

EFM data playback clock monitor. Outputs 4.3218 MHz when the phase is locked.

(Not used)

Synchronization signal detection ouput. Outputs a high level when the synchronization

22 FSEQ O signal detected from the EFM signal and the internally generated synchronization signal

agree. (Not used)

23 VDD – Digital system power supply.

24 SL+

O Serial data command sled signal output terminal from microprocessor.

25 SL–

26 NC – Not used.

27 PU IN I CD pickup inside limit switch.

28 CD R/W O CD R/W gain ON/OFF signal.

29 EMPH O

De-emphasis monitor pin. A high level indicates playback of a de-emphasis disk.

(Not used)

30 C2F O C2 flag output. (Not used)

31 DOUT O Digital output (EIAJ format). (Not used)

32 T3

I Test input. A pull-down resistor is built in. Must be connected to 0V.

33 T4

34 NC – Not connected.

35 MUTEL O Left channel one-bit D/A converter mute output.

36 LVDD – Left channel one-bit D/A converter power supply.

Pin No. Pin Name I/O Description

IC, LC78622NE

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Aiwa XR-M171 Service Manual Page 29

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