Self Diagnostics Of Sx-C700/C100/D700/D100; Sx-T100 Check Items - Sony SX-M700 Service Manual

4-5. SELF DIAGNOSTICS OF SX-C700/
C100/D700/D100
1 Short the SL5 and supply +24 V.
2 Each time the MIC ON/OFF button is pressed, the
operation of the audio circuit advances one step as
shown below.
1. Speaker ON
2. MIC ON
3. MIC OFF
4. Speaker atternuation ON
5. Speaker attenuation OFF
6. EP ATT ON
7. EP ATT OFF
8. Channel selector ON
9. Channel selector OFF
10. Speaker OFF
The respective control system can be checked using a
single D/C unit by observing the results of operating the
above sequence.
4-6(E)

4-6. SX-T100 CHECK ITEMS

After completing repair, check the following:
1. Supply +24 V to pin 3 of the input/output 6-pin
connector. Connect pin 4 to GND. Connect the input/
output 6-pin connector to the conference system and
turn on the main power.
2. Supply an audio signal of 1 kHz at _10 dBs between
pin 1 and pin 2 of the input/output 6-pin connector.
Confirm that the speaker emits an audio signal.
3. Connect an audio meter of _10 dBs range between pin
5 and pin 6 of the input/output 6-pin connector. Speak
into the microphone and confirm that the meter pointer
deflects.
(pin 1: HOT)
(pin 5: HOT)
SX-M700