Sony STR-DE245/DE345 specifications IC Block Diagrams, Pin No Pin Name Description

3-2. IC BLOCK DIAGRAMS

IC281 NJM2279 (VIDEO BOARD)

V-	SW2	VIN1	MUTE1	VOUT1	NC	V+
14 13 12			11	10	9	8
				AMP
				AMP
1	2	3	4	5	6	7
VIN3	SW1	VIN2	MUTE2	VOUT2	GND2	GND1

IC701, IC702 uPC2581V (MAIN BOARD)

BIAS CIRCUIT

PROTECTOR
REG	DRIVE	PRE	PRE	DRIVE
		DRIVE	DRIVE

1

2

3

4

5

6

7

8

9

10 11 12

13 14

15

MUTE

+VOUT1

–VOUT1

COMP1

NF1

IN1

GND

IN2

NF2

COMP2

–VOUT2

+VOUT2

VCC1 VCC2

VEE

IC501

STK350-230 (MAIN BOARD)

TR3

R1

TR1

INPUT

1

TR2

NF

2

TR4

R2

3

4

-VEOUT

5

R6

+VEOUT

TR7

6

TR6

R4

TR5

VSS

7

R3

D4

D3

GND

8

SUB

D1

D2

R5

R8

R7

VCC

9

R9

TR8

IC1	BU1924 (MAIN BAORD)
RCLK	(NC)	XO	XI	VDD2	VSS2	T1	T2
16	15	14	13	12	11	10	9
	CLOCK						TEST
		DEFFERENTIAL		BIPHASE	PLL		PLL 57KHz
		DECODER		DECODER	1187.5Hz		RDS/ARI
					8TH SWITCHED
					CAPACITOR
						FILTER
1	2	3	4	5	6	7	8
QUAL	RDATA	VREF	MUX	VDD1	VSS1	VSS3	CMP

IC950 NJM2103 (POWER BOARD)

CR	1						8	RESET
						–	+
VSC	2	VREF					7	VSA
	+	–
OUTC	3						6	VSB/SESIN
GND	4						5	V+
		Q
		R	S	+	–	+	–

3-3. IC PIN FUNCTION DESCRIPTION IC103 μPD780205GF (DISPLAY BOARD)

Pin No.				Pin Name				I/O	Description
1				VDD +5V				I	Power supply to μ-com
2							S1	O	Control Video IC switching
3							S2	O	Control Video IC switching
4				IC.MUTE				O	Control mute of Video IC
5							P34	—
6							P33	—
7	S.DATA (M61501FP)							O	Volume IC data
8	S.CLK (M61501FP)							O	Volume IC clock
9	S.CE (M61501FP)							O	Volume IC enable
10								I	Read μ-com reset signal
					RESET
11							X2	—
12							X1	—	For μ-com clock
13							VSS	—	Programming pow. supply
14							—	—	No use
15		RDS.DATA.IN						I	Read decoded RDS data
16				VDD +5V				—	Power supply to μ-com
17								O	Chip enable for ICs
		S.CE (LV1050M)
18								O	Output clock signal
	S.CLK(DOLBY.TUNER)
19								O	Output data signal
	S.DATA(DOLBY.TUNER)
20		S.CE (TUNER)						O	Chip enable for ICs
21								I	Tuner has tuned to a freq.
			AUTO-STOP
22				T.MUTE				O	Mute tuner during scanning
23								I	Tuned freq. has stereo
			STEREO-IN
24								I	Input tuner freq. data
				PLL.DATA
25						AVSS		—	Analog ground
26								I	Read remote comm. signal
						SIRCS
27							P16	—
28				SIGNAL				I	Detect RDS signal level
29				VERSION				I	Read version setting
30					A/D IV			I	Read key push signal
31					A/D III			I	Read key push signal
32						A/D II		I	Read key push signal
33							A/D I	I	Read key push signal
34		AVDD +5.0V						—	Analog Power Supply
35				AVREF				—	Analog reference ground
36							P03	—
37							P02	—
38		RDS.CLK.IN						I	Read decoded RDS clock
39								I	Read signal when AC off
							STOP
40							VSS	—	μ-com ground
41							P74	—
42							P73	—
43							P72	—
44							P71	—
45		MUTING LED						O	Control mute LED
46			VDD +5.0V					—	Power supply to μ-com
47								I	Detect Protector Status
				PROTECT
48			POWER-RY					O	Control Power relay
49			ENCODER					I	Read volume encoder changing
50			ENCODER					I	Read volume encoder changing

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