Vertex Standard VX-900 ユーザーズマニュアル

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."

YAESU P/N: T9206933

White (Pin 1: Speaker +)

Blue (Pin 2: Speaker -)

Red (Pin 4: MIC)

Green (Pin 5: Select)

N.C.  Yellow (Pin 7: Clone)

Shield (Pin 3: GND)

16-ohm

2w

220µF

+

+

220µF

+

1µF

2.2K-ohm

PTT

AF Output

Audio Generator

Attenuated
Test Output (1/2)

Pin 2 (Speaker -)

Pin 4 (MIC)

Pin 1 (Speaker +)

Pin 3 (GND)

Pin 5 (Select)

Pin 7 (Clone)