Sony CDX-C8850 - Fm/am Compact Disc Player, Service Manual

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• IC300 CXD2727Q (DIGITAL SIGNAL PROCESSOR) (MAIN BOARD)
Pin No. Pin Name I/O Pin Description
1 VSS1 — Digital ground
2 – 15 TD0 – 13 I Test pin (Normally, fixed at “L”.)
16 – 21 TST0 – 5 I Test pin (Normally, fixed at “L”.)
22 – 24 JPE1 – 3 I External condition jump input (“H” : condition jump) (Fixed at “L” in this set.)
25 VDD1 — Digital power supply pin (+3.3 V)
26 AVS3 — Analog ground (for D/A converter 1)
27 FL-OUT O Analog signal output for front (L-ch) output.
28 AVD3 — Analog power supply pin (+3.3 V) (for D/A converter 1)
29 RL-OUT O Analog signal output for rear (L-ch) output.
30 AVD5 — Analog power supply pin (+3.3 V) (for D/A converter 1)
31 AVS5 — Analog ground (for D/A converter 1)
32 AVD1 — Analog power supply pin (+3.3 V) (for A/D converter L-ch)
33 AVS1 — Analog ground (for A/D converter L-ch)
34 LREF O Pass control connection pin for A/D converter. (for L-ch)
35 LIN I Tuner and bus audio in signal input (for L-ch)
36 AVS7 — Analog ground (for D/A converter 2)
37 AVD7 — Analog power supply pin (+3.3 V) (for D/A converter 2)
38 NCO — Not used. (Open)
39 AVDX — Analog power supply pin (+3.3 V) (for master clock)
40 XTLO38 O System clock output (16.9344 MHz)
41 XTLI38 I System clock input (16.9344 MHz)
42 AVSX — Analog ground (for master clock)
43 SUB-OUT O Analog signal output for sub woofer output.
44 AVD8 — Analog power supply pin (+3.3 V) (for D/A converter 2)
45 AVS8 — Analog ground (for D/A converter 2)
46 RIN I Tuner and bus audio in signal input (for R-ch)
47 RREF O Pass control connection pin for A/D converter. (for R-ch)
48 AVS2 — Analog ground (for A/D converter R-ch)
49 AVD2 — Analog power supply pin (+3.3 V) (for A/D converter R-ch)
50 AVS6 — Analog ground (for D/A converter 3)
51 AVD6 — Analog power supply pin (+3.3 V) (for D/A converter 3)
52 RR-OUT O Analog signal output for rear (R-ch) output.
53 AVD4 — Analog power supply pin (+3.3 V) (for D/A converter 3)
54 FR-OUT O Analog signal output for front (R-ch) output.
55 AVS4 — Analog ground (for D/A converter 3)
56 VSS2 — Digital ground
57 RST I System reset signal input from system control (IC500). (“L” : reset)
58 BFOT O Master clock output for CD.
59 SCK I Clock signal input for serial data transfer from system control (IC500).
60 REDY O
Micon interface transfer permission signal output to system control (IC500).
(“L” : transfer prohibit)
61 TRDT O Serial data output to system control (IC500).
62 LAT I Serial data latch pulse input from system control (IC500).
63 RVDT I Serial data input from system control (IC500).
64 XS24 I
Serial data 24/32 bit slot select signal input from system control (IC500).
(“L” : 24 bit slot, “H” : 32 bit slot) (Valid at slave mode.)
65 VDD2 — Digital power supply pin (+3.3 V)
66 VSS3 — Digital ground
67 – 69 SO1 – 3 O Serial data output (Not used in this set.)
70 SOUT O Serial data output (Not used in this set.)
71 SI1 I Serial data input
72, 73 SI2, 3 I Serial data input (Fixed at “L” in this set.)