Sony CDX-V7800X, Service Manual

Page: 15 / 56

15
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTIONS
• IC513 CXP81960M-659R (CD SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 A MUTE O Audio mute control output
2 N.C — Not used. (Open)
3 CD ON O CD servo power supply control output
4 RW/R O RF amplifier gain control output (H: CD-RW, L: CD-R/CD-DA)
5 SLD MINUS O Sled motor control output
6 SELF SW I Disc self store switch input
7 E/(U) I Destination setting input (Fixed at H in this set)
8 PH1 I Photo coupler input 1 (Not used in this set)
9 SDA I/O I2C interface data input/output for video encoder IC.
10 SCL O I2C interface clock output to video encoder IC.
11 H WAIT I Wait input from MPEG decoder (Host) IC.
12 H INT I Interruption input from MPEG decoder IC.
13 – 20 HDATA7 – 0 I/O Host data 7 – 0 input for MPEG decoder IC.
21 EMPH O O D/A converter emphasis control output to DSP IC.
22 CD DATA O Data output to CD servo IC.
23 CD XTAL O System latch output to CD servo IC.
24 CD CKO O Clock output to CD servo IC.
25 D SW I Disc switch input
26 N.C — Not used. (Fixed at H in this set)
27 LIMIT SW I Sled limit switch input
28 SUBQ I CD sub-Q serial data input from DSP IC.
29 N.C — Not used. (Open)
30 SQCK O Sub-Q clock output to DSP IC.
31 N.C — Not used. (Open)
32 MSRQ O Serial request output of master microcomputer.
33 N.C — Not used. (Open)
34 CD RST O CD reset output
35, 36 N.C — Not used. (Open)
37 MP I Connect to VSS.
38 RESET I Slave microcomputer hard reset input
39 VSS — Ground
40 XTAL O Crystal oscillation output (12 MHz)
41 EXTAL I Crystal oscillation input (12 MHz)
42 N.C — Not used. (Fixed at H in this set)
43 TEXT IN I Not used. (Connect to SUBQ)
44 N.C — Not used. (Open)
45 TEXT CLK O Not used. (Connect to SQCK)
46 PH2 I Photo coupler input 2 (Not used in this set)
47 – 49 N.C — Not used. (Open)
50 AVSS — Analog ground
51 AVREF — Analog power supply reference input
52 AVDD — Analog power supply pin
53 GFS/MNT2 SEL I GFS/MNT2 select input of DSP IC. (Fixed at H in this set)
54 N.C — Not used. (Fixed at H in this set)
55 FOK I Focus OK input from DSP IC.
56 GFS I Guard frame synchro input from DSP IC.
57, 58 N.C — Not used. (Fixed at L in this set)
59 TEMP H I Not used. (Open)
60 TEMP L I Not used. (Open)
61 LOCK I Lock input from DSP IC.
62 TEST MODE I Not used. (Fixed at H in this set)
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