User Guide

3.17 Sound/LAN/Modem /TV Test 3 chTests and Diagnostics

Subtest 01 Microphoned recording & play

This subtest checks the function of the CODEC A/D D/A converter. Both

the microphone and headphone terminals can be checked at the same time.

Before executing this subtest, connect an external microphone to the

computer. If necessary, connect a headphone to the computer to check

whether the headphone jack of the computer is working properly.

When the subtest is selected, the following message appears.

....Press test number[1-3] ? pause

Press any key to continue...

Press any key, and the following message appear.

Press test number[1-3] ? Call micrec

When the above message is displayed, the screen is fixed for a while. Then

record the sound with the microphone.

When the following message appears, make sure the recorded sound is

replayed.

STACWAVE Version X.XX

Build data: XXX XX XXXX at XX:XX:XX

Loading “mic.wav”.

Subtest 02 Sin Wave

This subtest is executed by loading the COM file (ADSIN.COM). The

program expands sin wave data table from 16KB to 64KB, and creates the

play data. Then it transfers the data between the DMA and the CODEC to

paly the sine wave. (It sounds like a continuous beep). By using wave

measuring devices such as an oscilloscope, the data can be measured as a

sine wave.

When the subtest is executed, the following message appears.

....Press test number[1-4] ? pause

Press any key to continue...

Press any key, and the following message appears. Then sin wave is

expanded from 16KB to 64KB data and is played.

....Press test number[1-4] ? call sin

Satellite A50/TECRA A2 Maintenance Manual (960-478) 3-39