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Troubleshooting dialer alarm device

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Richman87

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[SOLVED]: Troubleshooting dialer alarm device

Hi,

I have an alarm dialer device (MA80) works properly except dialing.

- I tried to replace the dtmf generator (HT9200A) but it didn't work.

When the alarm is activated by body motion, the telephone line becomes in use, but when I listen to phone I hear deep dialing tones (very low) which are unable to make a call...

- If anybody know about this problem, or have service manual for this device, please post here

Thanks
 
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[SOLVED]: Troubleshooting dialer alarm device

I have Repaired this device :-D

Using Try and Error replacing for IC's and Transistors, at last I replaced the transistor (Q9 = S8050 D) near the Relay.
 

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