Midland Radio SP-300 service manual Receive State

MAXON

SP-300 HAND HELD

RECEIVE STATE

PIN #	IC1	IC2	IC3	IC5	IC6	IC401	IC402
1	GND	1.6	-	4.0	1.4	0.0	0.0
2	GND	5.0	-	3.5	GND	1.0	0.0
3	GND	5.0	-	4.0	0.0	1.3	AUDIO
4	5.0	5.0	-	4.1	GND	0.0	0.0
5	GND	5.0	-	3.8	AUDIO	0.0	5.0
6	7.5	0.0	-	3.8	7.5	0.0	0.0
7		0.0	-	3.8	4.0	0.0	0.0
8		0.0	-	4.2	1.5	2.0	0.0
9		5.0		AUDIO		0.0	4.0
10		2.6		0.8		4.0	0.0
11		2.6		1.0		4.0	0.0
12		5.0		0.0		5.0	0.0
13		3.0		4.0		0.0	0.0
14		5.0		GNS		5.0	5.0
15		0.0		0.0
16		0.0		1.8
17		5.0
18		0.0
19		0.0
20		2.5
PIN #	IC404	IC406	IC407	IC408	IC410	IC411
1	-	3.0	1.9	0.0	AUDIO	2.0
2	-	1.9	0.0	0.0	AUDIO	AUDIO
3	-	1.9	1.9	0.0	AUDIO	4.0
4	-	5.0	1.9	0.0	5.0	AUDIO
5	-	1.9	1.9	GND	AUDIO	AUDIO
6	-	1.9	5.0	5.0	AUDIO	GND
7	-	1.9	1.9	5.0	AUDIO	GND
8	-	1.9	A	5.0	AUDIO	GND
9	-	1.9	CLK		AUDIO	0.0
10	-	1.9	0.0		AUDIO	0.0
11	-	GND	5.0		5.0	5.0
12	-	1.9	0.0		AUDIO	0.0
13	-	1.9	1.9		AUDIO	1.9
14	-	1.9	1.9		AUDIO	1.9
15						AUDIO
16						5.0
17
18
19
20

zNOTE: IC4, 403 and 405 are not fitted on this model series.

Page -27- May 2001