3-2
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
MK1
SP1
Reference
Motorola Part
Designator
MK1
5080258E16
SP1
5005679X04
SIDE 1
LAYER 1 (L1)
LAYER 2 (L2)
LAYER 3 (L3)
LAYER 4 (L4)
LAYER 5 (L5)
LAYER 6 (L6)
SIDE 2
1
MATES WITH J470 ON
RADIO BOARD
2
1
MATES WITH J491 ON
RADIO BOARD
2
No.
Microphone, electret
Speaker assembly with connector
VHF1 PCB/SCHEMATICS/PARTS LISTS
INNER LAYERS
Description