System 90*s 32/16 Mode Scan + MPL Head Cable Pinout Example
		- Description
		- J1 Connector
		- Black 22 Pin Connector
		- #1 Gray 22 Pin Connector
		- #2 Gray 22 Pin Connector
		- #1 Light Purple 22 Pin Connector
		- #2 Light Purple 22 Pin Connector
		- Blue 6 Pin Connector
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Here is a typical negative ground pinout for a System 90*s HLN4336A (8 mode select with scan and display), HLN4298A (4 bank select, volume, squelch and power) and a TRN4324A (8 code operator select MPL) control head . This is a 32 mode control head with scan and display, and an 8 mode System 90*s operator select MPL. The pinout is for the radio connector J1, control head conectors 22 pin black, 22 pin gray #1, 22 pin gray #2, 22 pin light purple #1, 22 pin light purple #2 and 6 pin blue. There are also wires that just connect from one control head connector to another control head connector.

The 16 mode version of this control head using the HLN4296A (2 bank select, volume, squelch and power) board instead of the HLN4298A (above) has the same wiring except Mode 5 on pin 3 of the 6 pin blue connector and its wire is not used.

Cable's J1 connector front view pin out (cable on left side).

J1 SYSTEM 90*s PINOUT
J1	22 pin BLACK	22 pin GRAY #1	22 pin GRAY #2	22 pin Lt. PURPLE #1	22 pin Lt. PURPLE #2	J1 DESCRIPTION
A						A+ (Red Wire)
B						A- (jumpered to J1 pins 8 and 10)
J1-1		11				Control Head Strobe
J1-2	16					Detected Audio
J1-3	20					Volume - Receiver Audio
J1-4	22					PTT
J1-5	14					PTT Reference
J1-6		15				Squelch Tail {moved from Display Enable}
J1-7						Securenet Modulation
J1-8			2			Switched B- (jumpered to J1 pins 10 & B)
J1-9						Switched B+ to Accessories
J1-10		2				Chassis (jumpered to J1 pins 8 & B)
J1-11		10				Mode 12
J1-12				3		Mode 5
J1-13				8		Mode 1
J1-14	21					Shield
J1-15			1			Switched B+
J1-16				11		Mode 6
J1-17				7		Mode 2
J1-18
J1-19		9				Mode 10
J1-20						Transmit Indicator
J1-21						Transmit Mode
J1-22	6					Speaker Audio Low
J1-23				10		Mode 7
J1-24				6		Mode 3
J1-25				2		Mode 4
J1-26		8				Mode 9
J1-27	11					Mic. High
J1-28	17					Squelch
J1-29				5		Mode 8
J1-30		7				Mode 11
J1-31				1		Channel Scan Enable {JU1 removed}
J1-32	4					PL/DPL Disable
J1-33						Display Enable {JU14 installed}
J1-34						Sidetone In
J1-35						EMS Mute
J1-36						Transmit DVP
J1-37	3					Speaker Audio High

• Important notice: If you have a HLN4760C Personality Board J1-33 is a DVP-XL line, not a Display Enable line. In this case JU14 should be installed and J1-33 should not be connected to anything except a DVP-XL control head (if you are using one) or to pin 7 of of the Black 22 pin connector (which is not connected inside the control head). Also jumper J21 should be in the A position. If it is in the B position then J1-5 becomes a DVP-XL line and it should only be connected to a DVP-XL control head.
• The HLN4257 and TRN8861 Personality Boards which do not have jumper JU14 can have a custom jumper wire installed on the solder side of the Personality Board from the J1-33 pin to the J1-8 pin.
• The Squelch Tail J1-6 signal is used by the HLN4298A to detect false mode 32 indications. This cable did not come wired correctly so the old Display Enable J1-33 wire was moved to J1-6 and Personality Board jumper JU-14 was installed to activate the display enable function.
• Sometimes a J1-34 Sidetone wire will be installed in a spare 22 pin connector that is not used and tied back to the cable. Sidetone is only hooked up inside the radio on "VXJ" models.

22 pin System 90*s connector rear view pin out.

BLACK 22 PIN CONNECTOR SYSTEM 90*s PINOUT (HLN4298A)
PIN #	22 pin GRAY #1	22 pin GRAY #2	22 pin Lt. PURPLE #1	22 pin Lt. PURPLE #2	6 pin BLUE	J1	DESCRIPTION
1	12						Switched B+
2							Hang Up Box Gnd.
3						37	Speaker Audio
4-15						32	PL/DPL Disable
5							N.C.
6-9						22	Speaker Audio Low
7							(Display Enable) {moved}
key
9-6	13						(Chassis)
10							(Shield)
11						27	Mic. High
12							A+ Unswitched  (Green Wire)
13							A+ Ignition Switch  (Orange Wire)
14						5	PTT Reference
15-4							Hang Up Box Switched
16						2	Detected Audio
17						28	Squelch
key
19-21							(Shield)
20						3	Volume - Receiver Audio
21-19						14	Shield
22						4	PTT

• N.C. - No connection.
• This cable did not come wired correctly so the old Display Enable wire was moved from pin 7 of this connector to pin 15 of the 22 gray pin connector.
• When two pin numbers are separated by a dash (i.e. 4-15) it indicates the circuit board the connector plugs into shorts these pins together. Because the shorts are provided by the circuit board, they are missing when the connector is removed and the radio may not function until all the connectors are correctly installed.

#1 GRAY 22 PIN CONNECTOR SYSTEM 90*s PINOUT (HLN4336A)
PIN #	22 pin BLACK	22 pin GRAY #2	22 pin Lt. PURPLE #1	22 pin Lt. PURPLE #2	6 pin BLUE	J1	DESCRIPTION
1-12		12					Switched B+
2-3-13		13					Switched B-, J1-10 Chassis
3-2-13							(Switched B-)
key
5					6		PTT Indicator
6-16							(Lights)
7-17						30	Mode 11
8-18						26	Mode 9
9-19						19	Mode 10
10-20						11	Mode 12
11-22						1	Control Head Strobe
12-1	1						(Switched B+)
13-2-3	9						(Switched B-)
key
15						6	Squelch Tail {moved from Display Enable}
16-6							(Lights)
17-7		7					(Mode 11)
18-8		8					(Mode 9)
19-9		9					(Mode 10)
20-10		10					(Mode 12)
21					4		Mode Strobe
22-11		11					(Control Head Strobe)

• The PTT Indicator signal pin 5 and Squelch Tail signal pin 15 are used by the HLN4298A to detect false mode 32 indications. This cable did not come wired correctly so the old Display Enable wire on the 22 pin black connector pin 7 was moved to pin 15 of this 22 pin gray connector.
• When two pin numbers are separated by a dash (i.e. 8-18) it indicates the circuit board the connector plugs into shorts these pins together. 2-3-13 indicates all three pins are shorted together by the circuit board. Because the shorts are provided by the circuit board, they are missing when the connector is removed and the radio may not function until all the connectors are correctly installed.
• Please note the mode lines, control head strobe and power lines have duplicate connections. These are used to daisy chain these lines to the gray #2 connector. Even more of these gray connectors can be daisy chained.

#2 GRAY 22 PIN CONNECTOR SYSTEM 90*s PINOUT (TRN4324A)
PIN #	22 pin BLACK	22 pin GRAY #1	22 pin Lt. PURPLE #1	22 pin Lt. PURPLE #2	6 pin BLUE	J1	DESCRIPTION
1-12						15	Switched B+
2-3-13						8	Switched B-, J1-10 Chassis
3-2-13							(Switched B-)
key
5							special customer application
6							special customer application
7-17		17					Mode 11
8-18		18					Mode 9
9-19		19					Mode 10
10-20		20					Mode 12
11-22		22					Control Head Strobe
12-1		1					(Switched B+)
13-2-3		2					(Switched B-)
key
15
16
17-7							(Mode 11)
18-8							(Mode 9)
19-9							(Mode 10)
20-10							(Mode 12)
21							Mode Strobe
22-11							(Control Head Strobe)

• Please note the mode lines, control head strobe and power lines have duplicate connections. These are used to daisy chain these lines to the gray #1 connector. Even more of these gray connectors can be daisy chained.

#1 Lt. PURPLE 22 PIN CONNECTOR SYSTEM 90*s PINOUT (HLN4336A)
PIN #	22 pin BLACK	22 pin GRAY # 1	22 pin GRAY # 2	22 pin Lt. PURPLE #2	6 pin BLUE	J1	DESCRIPTION
1						31	Channel Scan Enable
2-12						25	Mode 4
3-14						12	Mode 5
key
5-16						29	Mode 8
6-17						24	Mode 3
7-18						17	Mode 2
8-19						13	Mode 1
9
10-21						23	Mode 7
11-22						16	Mode 6
12-2				2			(Mode 4)
key
14-3				3			(Mode 5)
15
16-5				5			(Mode 8)
17-6				6			(Mode 3)
18-7				7			(Mode 2)
19-8				8			(Mode 1)
20
21-10				10			(Mode 7)
22-11				11			(Mode 6)

• When two pin numbers are separated by a dash (i.e. 8-19) it indicates the circuit board the connector plugs into shorts these pins together. Because the shorts are provided by the circuit board, they are missing when the connector is removed and the radio may not function until all the connectors are correctly installed.
• Please note the mode lines have duplicate connections. These are used to daisy chain these signals to additional System 90*s accessories (i.e. MPL select, operator non-priority scan select, etc.). Even more of these lt. purple connectors can be daisy chained.

#2 Lt. PURPLE 22 PIN CONNECTOR SYSTEM 90*s PINOUT (TRN4324A)
PIN #	22 pin BLACK	22 pin GRAY # 1	22 pin GRAY # 2	22 pin Lt. PURPLE #1	6 pin BLUE	J1	DESCRIPTION
1
2-12				12			Mode 4
3-14				14			Mode 5
key
5-16				16			Mode 8
6-17				17			Mode 3
7-18				18			Mode 2
8-19				19			Mode 1
9
10-21				21			Mode 7
11-22				22			Mode 6
12-2					1		(Mode 4)
key
14-3					3		(Mode 5)
15
16-5							(Mode 8)
17-6							(Mode 3)
18-7							(Mode 2)
19-8							(Mode 1)
20
21-10							(Mode 7)
22-11							(Mode 6)

• Please note the mode lines have duplicate connections. These are used to daisy chain these signals to additional System 90*s accessories (i.e. MPL select, operator non-priority scan select, etc.). Even more of these lt. purple connectors can be daisy chained.

6 pin System 90*s connector rear view pin out.

BLUE 6 PIN CONNECTOR SYSTEM 90*s PINOUT (HLN4298A)
PIN #	22 pin BLACK	22 pin GRAY #1	22 pin GRAY #2	22 pin Lt. PURPLE #1	22 pin Lt. PURPLE #2	J1	DESCRIPTION
1					12		Mode 4 {16* & 32 mode  control heads}
key
3					14		Mode 5 {32* mode control  heads}
4		21					Mode Strobe
5							DVP Audio In
6		5					PTT Indicator

• The PTT Indicator signal pin 6 orignates here and is used by the HLN4298A to detect false mode 32 indications.
• * - remember an 8 mode Talkaround control head is really a 16 mode control head and a 16 mode Talkaround control head is really a 32 mode control head.
• In some cases that are different from this example, when there is no Mode Strobe signal supplied by any other boards, a Ground is substituted for the Mode Strobe signal. The Mode Strobe signal is used to electronically disconnect the control head bank select diodes from mode lines 4 and 5 when other System 90*s boards are using these mode lines for other purposes.
• Radios that have DVP control heads use DVP Audio In (above) instead of the Detected Audio on pin 16 of the 22 pin black connector.

• All of the yellow highlighted signals do not connect to the radio. They are external power hookups, interconnections between control head boards and accessories (i.e. the hangup box).
• When two pin numbers are separated by a dash (i.e. 14-3) it indicates the circuit board the connector plugs into shorts these pins together. 2-3-13 indicates all three pins are shorted together by the circuit board. Because the shorts are provided by the circuit board, they are missing when the connector is removed and the radio may not function until all the connectors are correctly installed.
• All boards must have their internal jumpers set correctly.

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PL, Private Line, DPL, Digital Private Line, MPL, Talkaround, MDC-600, MDC-1200, MVS-20, Securenet, Smartnet, Privacy Plus, Trunked X2, Trunked X3, Touch Code, Quick Call II, Channel Scan, Talkback Scan, System 90, System 90*s, Systems 9000, Mitrek, Micor, Spectra, MataTrac, Syntor, Syntor X, Syntor X 9000 and Syntor X 9000E are trademarks of Motorola Inc.