Test Adapter Schematic

Connector Pinout Diagram

Pin 1 (Speaker +)

Pin 3 (GND)

Pin 2 (Speaker -)

Pin 5 (Select)

Pin 4 (MIC)

Pin 7 (Clone)

AF Test Adapter Schematic

White (Pin 1: Speaker +)

220µF

 

 

 

 

+

16-ohm

 

 

2w

 

220µF

 

 

 

 

+

Blue (Pin 2: Speaker -)

YAESU P/N: T9206933

 

 

 

Shield (Pin 3: GND)

Attenuated

Test Output (1/2)

AF Output

Red (Pin 4: MIC)

+

Audio Generator

1µF

 

 

PTT

2.2K-ohm

Green (Pin 5: Select)

N.C. Yellow (Pin 7: Clone)

Note!

Because of the bridge audio amplifier circuit used in the VX-900, it is necessry to construct

and use a simple audio load test adapter as shown in the schematic diagram above, when con-

ducting receiver alignment steps.

Do not connect either side of the speaker leads to chassis "ground."

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