Sony CDX-3900R, Service Manual

Page: 17 / 54

17
• IC5 CXP84640-063Q (CD SYSTEM CONTROL) (SERVO BOARD)
Pin No. Pin Name I/O Pin Description
1 ITRPT — Not used in this set.
2, 3 — — Not used in this set.
4, 5 NCO — Not used in this set.
6 OPEN I Front panel open detection input
7 CLOSE O Front panel close control output
8 LINKOFF I Bus interface link input
9 NCO — Not used in this set.
10 D SW I Down switch input (SW4)
11 SSTP I Limit switch input (SW3)
12, 13 NCO — Not used in this set.
14, 15 — — Not used in this set.
16 EMPH O O De-emphasis ON/OFF control output
17 CDMON O CD mechanism deck power control output
18 CD ON O CD power control output
19 A MUT O System attenuate control output
20 LD ON O Laser power ON/OFF control output
21 CD RST O CD system reset output
22 HOLD O Hold switch output
23 AGC CONT O AGC control output
24 — — Not used in this set.
25 PH3 I Not used in this set.
26 TSTIN0 I Not used in this set.
27 TSTIN1 I Not used in this set.
28 TST.CLV I Not used in this set.
29 NCO — Not used in this set.
30 RESET I System reset input (“L”=Reset)
31 X IN I X’tal oscillator input from system clock. (10 MHz)
32 X OUT O X’tal oscillator output for system clock. (10 MHz)
33 GND — Analog ground
34 XT OUT O Not used in this set.
35 XT IN I Not used in this set.
36 AVSS — A/D converter ground
37 AVREF I A/D converter reference voltage input
38 TEP L I Not used in this set.
39 TEP H I Not used in this set.
40 SLED– I Sled drive input
41 PH2 I Not used in this set.
42 SEK/SMET I Fixed at “H” in this set.
43 GFS/MNT2 SEL I Fixed at “H” in this set.
44 SC-JIG ON/OFF I Fixed at “H” in this set.
45 SCLK O CD-TEXT data read clock output
46 LOCK I/O Lock signal input/output
47 — — Not used in this set.
48 SCK2 O Sub Q read clock output
49 SI2 I Sub Q 80 bit, PCM peak and level data 16 bit input.
50 — — Not used in this set.
51 BUS CLK I/O Bus system serial clock input/output
52 BUS SI I Bus system serial interface input
53 BUS SO O Bus system serial interface output
54 F OK I Focus OK signal input
55 GFS I GFS signal detection input
56 TEST MODE I Fixed at “H” in this set.
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