Kenwood C929, Service Manual

Page: 4 / 18

PORT
No.
PORT NAME I/O FUNCTION OPERATING CONDITION
1 - - -
2 TSTB O Text data strove.
3 T-BANK I Tracking filter bank SW signal. "H" : Bank 1 (Gain-up mode).
4 F-OK I Focus-on signal. "H" : Focus on.
5 XTALEN O DAC servo IC oscillation stop control. "H" : Oscillation stop.
6 RESET O Servo IC reset. "L" : Reset.
7 SAO O Servo IC communication address setting.
8 SSTB O Servo IC communication strove.
9 VDD - VDD
10 X2 - Main clock 2.
11 X1 I Main clock 1.
12 VSS - GND.
13 - - -
14 XT1 - Sub clock 1.
15 RESET I Reset.
16 FO-GUP I Focus gain-up SW. "H" : Focus gain up.
17 MG-SW I Magazine SW. "H": Magazine inserted.
18 EJ-SW I Eject SW. "H" : Switch on.
19 B-REQ-H I Communication request signal.
20 PACK I Text data - Pack synchronization signal.
21 SYS-ON I Changer control from head unit. "L" : System on.
22 BU-DET I Back-up momentary power-down detection. "H" : Momentary power down.
23 AVDD - VDD.
24 A VREF 0 I Inner A/D converter reference voltage.
25 HOT I Temperature-up detection.
Detects over 4V, releases the detection
when the voltage goes to be under 4V.
26 LPS I Mechanism deck height detection.
27 LO-E-SW I Loading end SW. "L" : Loading ends.
28 LIM-SW I Limit switch.
"L" : Laser pick-up being most inside
detection.
29 T-OFF I Tracking-off mode. "H" : Tracking off.
30 ADJ-SEL I Servo automatic adjustment on/off. "H" : Automatic adjustment off.
31 TEST1 I For mechanism endurance test.
32 TEST2 I For mechanism endurance test.
33 AVSS - GND.
34 AUDIO O Audio relay control out. "H" : Changer source.
35 A-MUTE O Audio mute. "L" : Mute on.
36 A VREF 1 - Inner A/D converter reference voltage.
37 S-DI I Servo IC communication serial data.
38 S-DO O Servo IC communication serial data.
39 S-CK O Servo IC communication serial clock.
40 B-DIC I Bus serial.
41 B-DCOM O Bus serial.
42 B-CLK O Bus serial clock.
43 B-C/D O Bus command data SW.
44 CH-MUTE O Audio mute to head unit. "L" : Mute on.
45 TSI I Text data.
46 TSO O Text data.
47 TSCK O Text clock.
48 A0 O Address setting to S-RAM.
49 A1 O Address setting to S-RAM.
50 A2 O Address setting to S-RAM.
51 A3 O Address setting to S-RAM.
52 A4 O Address setting to S-RAM.
(X32-) IC7 : µ-COM
C929
4
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