Sony STR-DE845 service manual • DIGITAL BOARD IC1503 AK4527 A/D, D/A CONVERTER

• DIGITAL BOARD IC1503 AK4527 (A/D, D/A CONVERTER)

Pin No.		Pin Name	I/O			Description
1		SDOS	I	Data source select terminal	“L”: internal ADC output “H”: DAUX input
2		I2C	I	Control mode select terminal	“L”: 3-wire serial “H”: I2C bus
3		SMUTE	I	Soft mute signal input from the system controller (IC1201)
4		BCLK	I	Audio serial data clock signal input from the digital audio interface receiver (IC1101)
5		LRCK	I	Input channel clock signal input from the digital audio interface receiver (IC1101)
6		SDT1	I	DAC1 audio serial data input from the audio DSP (IC1401)
7		SDT2	I	DAC2 audio serial data input from the audio DSP (IC1401)
8		SDT3	I	DAC3 audio serial data input from the audio DSP (IC1401)
9		SDTO	O	audio serial data output to the dolby digital audio decoder (IC1301)
10		DAUX	I	Audio serial data input terminal		Not used (fixed at “L”)
11		DFS	I	Double speed sampling mode signal input from the system controller (IC1201)
				“L”: normal speed “H”: double speed
12, 13	DEM1, DEM0		I	De-emphasis signal input terminal Not used (fixed at “L”)
14		TVDD	—	Power supply terminal (+5V) (for output buffer )
15		D5V	—	Power supply terminal (+5V) (digital system)
16		DGND	—	Ground terminal (digital system)
17		PD	I	Power down and reset signal input terminal “L”: power down and reset
18		ICKS2	I	Clock select 2 input terminal (fixed at “L” in this set)
19		ICKS1	I	Clock select 1 input terminal (fixed at “H” in this set)
20		ICKS0	I	Clock select 0 input terminal (fixed at “H” in this set)
21		CAD1	I	Chip address 1 input terminal	Used during the serial control mode (fixed at “L” in this set)
22		CAD0	I	Chip address 0 input terminal	Used during the serial control mode (fixed at “L” in this set)
23		LOUT3	O	L-ch 3 analog output to the select switch (IC1502)
24		ROUT3	O	R-ch 3 analog output to the select switch (IC1502)
25		LOUT2	O	L-ch 2 analog output to the select switch (IC1502)
26		ROUT2	O	R-ch 2 analog output to the select switch (IC1502)
27		LOUT1	O	L-ch 1 analog output to the select switch (IC1502)
28		ROUT1	O	R-ch 1 analog output to the select switch (IC1502)
29		LIN–	I	L-ch analog negative input from the line amp (IC1504)
30		LIN+	I	L-ch analog positive input from the line amp (IC1504)
31		RIN–	I	R-ch analog negative input from the line amp (IC1504)
32		RIN+	I	R-ch analog positive input from the line amp (IC1504)
33		DZF2	O	Zero input detect 2 terminal	Not used (open)
34		VCOM	O	Common voltage output terminal
				Large external capacitor is used to reduce power supply noise
35		VREFH	I	Positive voltage reference input terminal (+5V)
36		A5V	—	Power supply terminal (+5V) (analog system)
37		AGND	—	Ground terminal (analog system)
38		DZF1	O	Zero input detect 1 terminal	Not used (open)
39		MCLKI	I	Master clock input from the digital audio interface receiver (IC1101)
40		S/P	I	Parallel or serial select terminal		“L”: serial control mode (fixed at “L” in this set)
41		CS	I	Chip select signal input from the system controller (IC1201)
42		CCLK	I	Clock signal input from the system controller (IC1201)
43		CDTI	I	Control signal output to the system controller (IC1201)
44		LOOP1	O	Loop back mode 1 signal output terminal (fixed at “L” in this set)

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