Codec (Rec/Play); Fm Synthesizer; Sine Wave Playback; Joystick - Toshiba T2150 series Maintenance Manual

3.15 SOUND Test

To execute the SOUND test, select 12 from the DIAGNOSTICS TEST MENU, press Enter
and follow the directions on the screen. The SOUND test contains one subtest that tests the
T2150 series SOUND functions.
Subtest 01

CODEC (REC/PLAY)

NOTE: To execute this subtest, the internal microphone and internal
headphone (or internal speaker) are required.
Test the functions of the Codec (ES688) A/D, D/A converter. At the same
time, test the microphone terminals and Headphone terminals. When you
execute this subtest the following message is displayed
[Quick REC & PLAY for ES488/688]
Press any key to *** REC ***
After pressing any key, start the recording and immediately play the sound. (It
takes three seconds.)
Subtest 02

FM Synthesizer

Test the OPL# (YMF262) functions. Connect the headphone, and check the
scale of right and left side. Also check the sound adjustment volume.
Subtest 03

SINE wave playback

This subtest expands the sine wave data table to 64KB and creates sine wave
data. The play data is transferred between DMA and CODEC, and plays the
sound. (It is a long beep.) Also, using the oscilloscope, observe the sine wave
form.
Subtest 04

Joystick

To execute this subtest, a port replicator and joystick are required. For mini-
mum sampling data, turn the stick to the upper left, and press the A or B
button. For maximum sampling data, turn the stick to lower right and press
the A or B button (it must be a button other than the one used for minimum
sampling data). If two sampling data are the same, an error occurs.
Subtest 05 MIDI/Joystick port
Conduct a wraparound test on MIDI/Joystick port.
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T2150 Series