3-2 VHF1 PCB/SCHEMATICS/PARTS LISTS
1.2 Six Layer Circuit Board
The main PCB is a 6-layer circuit board, the copper steps are in the layer sequence shown below.
1.3 Speaker and Microphone Schematic
1.3.1 Speaker and Microphone Parts List
Reference
Designator
Motorola Part
No.
Description
MK1 5080258E16 Microphone, electret
SP1 5005679X04 Speaker assembly with connector
LAYER 1 (L1)
LAYER 2 (L2)
LAYER 3 (L3)
LAYER 4 (L4)
LAYER 5 (L5)
LAYER 6 (L6)
INNER LAYERS
SIDE 1
SIDE 2
MK1
SP1
1
2
1
2
MATES WITH J470 ON
RADIO BOARD
MATES WITH J491 ON
RADIO BOARD