Sony PCS-1500 Service Manual page 162

4-2. Self-diagnostics Function
After connecting the AUDIO
IN and AUDIO OUT with pin
cable, enter #diag[|]audio[|]
analog[|]1↓
Sound is output
from speaker
Start up the application by
entering #reboot↓, and enter
>set[|]1470001c[|]8e↓
>mail[|]42, 380d0007018080↓
Output of IC600 [26] is
returned to IC600 [3,4] and is
output from IC600 [27] by
this setting
Sine wave is
present at IC600
Sine wave is
present at IC600
Sine wave is
present at CN602
Replace speaker
n
To perform this diagnostics, the digital checks of the video block and audio DSP needs to be completed
beforehand.
4-32
AA-1
YES
NO
(*1)
(*1) :
NO
[26]
IC600 and its peripheral
YES
NO
[3,4]
Circuit between IC600
YES
[26] and CN600 [3,4]
NO
[1,2]
Circuit between IC600
YES
[27] and IC602 [1,2]
YES
Muting is NG
Q602, Q603, Q604, or
NO
AA-2
Waveforms at IC600 [3,4,26] and
[27] and those of CN602 [1,2] under
this state are shown at the end of this section.
They are pictures No. A1 to A5.
their peripheral
PCS-1500/1500P