Sony CDX-M770 - Fm/am Compact Disc Player, Руководство по обслуживанию

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CDX-M770
• IC901 CXD2727Q-4 (DIGITAL SIGNAL PROCESSOR, DIGITAL FILTER, D/A CONVERTER) (MAIN BOARD)
Pin No. Pin Name I/O Pin Description
1 DGND — Ground terminal (digital system)
2 – 21 NIL I Input terminal for the test (fixed at “L”)
22 – 24 JPE1 – JPE3 I External condition jump terminal “H”: condition jump (fixed at “L”)
25 DVDD — Power supply terminal (+3.3 V) (digital system)
26 DA1GND — Ground terminal (for D/A converter 1) (analog system)
27 DA1LO O
D/A converter 1 (L-ch side) output terminal
Analog signal output for front side (L-ch side) output in this set
28 DA1VDD — Power supply terminal (+3.3 V) (for D/A converter 1) (analog system)
29 DA1RO O
D/A converter 1 (R-ch side) output terminal
Analog signal output for rear side (L-ch side) output in this set
30 DA1VDD — Power supply terminal (+3.3 V) (for D/A converter 1) (analog system)
31 DA1GND — Ground terminal (for D/A converter 1) (analog system)
32 ADLVDD — Power supply terminal (+3.3 V) (for L-ch side A/D converter) (analog system)
33 ADLGND — Ground terminal (for L-ch side A/D converter) (analog system)
34 ADLREF O Connected to the bus control for A/D converter (for L-ch side)
35 ADLIN I
A/D converter (L-ch side) analog input terminal
Tuner and bus audio input signal (L-ch side) in this set
36 DA2GND — Ground terminal (for D/A converter 2) (analog system)
37 DA2VDD — Power supply terminal (+3.3 V) (for D/A converter 2) (analog system)
38 DA2LO O D/A converter 2 (L-ch side) output terminal (Not used.)
39 MCKVDD — Power supply terminal (+3.3 V) (for master clock) (analog system)
40 MCKO O System clock output terminal (16.9344 MHz)
41 MCKI I System clock input terminal (16.9344 MHz)
42 MCKGND — Ground terminal (for master clock) (analog system)
43 DA2RO O
D/A converter 2 (R-ch side) output terminal
Analog signal output for sub woofer output in this set
44 DA2VDD — Power supply terminal (+3.3 V) (for D/A converter 2) (analog system)
45 DA2GND — Ground terminal (for D/A converter 2) (analog system)
46 ADRIN I
A/D converter (R-ch side) analog input terminal
Tuner and bus audio input signal (R-ch side) in this set
47 ADRREF O Connected to the bus control for A/D converter (for R-ch side)
48 ADRGND — Ground terminal (for R-ch side A/D converter) (analog system)
49 ADRVDD — Power supply terminal (+3.3 V) (for R-ch side A/D converter) (analog system)
50 DA3GND — Ground terminal (for D/A converter 3) (analog system)
51 DA3VDD — Power supply terminal (+3.3 V) (for D/A converter 3) (analog system)
52 DA3LO O
D/A converter 3 (L-ch side) output terminal
Analog signal output for rear side (R-ch side) output in this set
53 DA3VDD — Power supply terminal (+3.3 V) (for D/A converter 3) (analog system)
54 DA3RO O
D/A converter 3 (R-ch side) output terminal
Analog signal output for front side (R-ch side) output in this set
55 DA3GND — Ground terminal (for D/A converter 3) (analog system)
56 DGND — Ground terminal (digital system)
57 SYS RST I System reset signal input from the master controller (IC501) “L”: reset
58 BFOT O Master clock signal output terminal
59 SCK I Serial data transfer clock signal input from the master controller (IC501)
60 REDY O
Transfer enable signal output to the master controller (IC501)
“L”: transfer prohibition
61 TRDT O Serial data output to the master controller (IC501)
62 XLAT I Serial data latch pulse input from the master controller (IC501)
63 RVDT I Serial data input from the master controller (IC501)
64 24/32BIT (NIH) I
Serial data 24/32 bit slot selection signal input terminal
“L”: 24 bit slot, “H”: 32 bit slot (validity at slave mode) (fixed at “L” in this set)