Sony PCS-1500 Service Manual page 164

4-2. Self-diagnostics Function
AA-3
Connect CN601 [2] and
CN401 [3] via 390 kΩ
(*1)
resistor and perform
#diag[|]audio[|]analog[|]4↓
ALL TEST PASSED?
NO
The PCS-1500/1500P
works satisfactorily with
the build-in microphone
NO
CN601 [1] = 4.6~6.1 V?
YES
Trouble is suspected in
between CN601 to IC600 [5, 6]
n
Before starting performing this diagnostics, the digital check of the video block and audio DSP needs to
have been completed beforehand.
4-34
(*1) : Waveforms are shown as pictures
CN601 [2], IC604 [1,3] when the application is started up
and the following commands are inputted under
this connection.
>set[|]1470001c[|]8e↓
>mail[|]42,380d0007018080↓
This enables to check the waveforms and
voltage level.
YES
Diagnostics of audio block is complete
YES
Replace the built-in
microphone
NO
Q601, and its peripheral
PCS-1500/1500P