Aiwa XR-MD510, Service Manual

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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 I PDO output current adjustment resistor connection.
6 VVDD – Internal VCO power supply.
7 FR I 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+
O
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+
O
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 Serial data command sled signal output terminal from microprocessor.
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).
32 T3
I Test input. A pull-down resistor is built in. Must be connected to 0V.
33 T4
34 NC – Unused. Must be left open.
35 MUTEL O Left channel one-bit D/A converter mute output. (Not used)
36 LVDD – Left channel one-bit D/A converter power supply.
37 LCHO O Left channel one-bit D/A converter output.
Pin No. Pin Name I/O Description
IC, LC78622ED