Motorola HT 1000 Specific, If neighboring Pbga components are heated, Popcorn failure

	work for shorts due to solder bridges. When removing modules with
	metal enclosures, be sure to desolder the enclosure ground tabs as well
	as the module pins.
Flexible Circuits	The flexible circuits are made from a different material than the rigid
	boards, and different techniques must be used when soldering.
	Excessive prolonged heat on the flexible circuit can damage the
	material. Avoid excessive heat and excessive bending. For parts
	replacement, use the ST-1087 Temperature-Controlled Solder Station
	with a 600 or 700 degree tip, and use small diameter solder such as ST-
	633. The smaller size solder will melt faster and require less heat being
	applied to the circuit.
	To replace a component on a flexible circuit, grasp the edge of the
	flexible circuit with seizers (hemostats) near the part to be removed,
	and pull gently. Apply the tip of the soldering iron to the component
	connections while pulling with the seizers. Do not attempt to puddle
	out components. Prolonged application of heat may damage the
	flexible circuit.
Specific	During all repair procedures, heating neighboring components can be
	minimized by:
	• using upper heat only.
	• using the correct size heat-focus head, approximately the same size
	as the carrier being replaced.
	• keeping the heat focus head approximately 1/8” above the printed
	circuit board when removing or replacing the device.

Strip Connector (P301/ P704)

!	If neighboring PBGA components are heated
	above 365 degrees F. (185 degrees C.), they will
	suffer die-bond delamination and possible
C a u t i o n	“popcorn” failure.

On the latest version HT 1000, JT 1000, MT 2000, MTS 2000, and MTX series radios, a strip connector, two female connectors and a strain relief electrically connect the RF board with the controller board. On earlier versions of these radios, the RF board and controller board were connected using a jumper flex that soldered directly to the circuit board solder pads.

An interconnect kit, REX4350A, is available to retrofit earlier version jumper-flex radios with the later version strip connector parts. The REX4350A kit includes the following items:

•CONNECTOR, Female (J301) 0905461X01

•CONNECTOR, Female (J704) 0905461X01

•CONNECTOR, Male (P301/P704) 0905461X01

•STRAIN RELIEF 4205507X01

•INSTRUCTIONS 6880309F14

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