We have seen at least 30 or more CDM's over the past couple of years (out of a thousand or so) that fail in a no power-up state. They end up at Motorola and they "replaced main board".
Anyone else see this? Ant idea what the issue is?
CDM mobiles- No power up
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CDM units dead
I have tried to repair a few of these. My conclusion is that the 16.8 MHZ VCO crystal (Y4261 on the UHF model) is bad. This is the case on many of their other units. I have never successfully replaced one as they are almost welded onto the board. Motorola had never repaired any of the Pro series units I have sent them unless it is a reflash. Every unit was a board or total unit replacement_RRRobby
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jackhackett
- Posts: 1519
- Joined: Tue Jun 10, 2003 8:52 am
I've seen a few, depot reports different things, from replacing eeprom to control head to main board.. but then what they put on the invoice is not always anywhere near the truth...
Main problem I have with CDMs is we have customers who like to kick the volume controls off (if the radio doesn't work, the boss can't check up on them).
I've not looked into the workings of the CDMs all that much, so I'm curious why the reference oscillator would cause it to not power up, are they also using it as the cpu clock or something?
Main problem I have with CDMs is we have customers who like to kick the volume controls off (if the radio doesn't work, the boss can't check up on them).
I've not looked into the workings of the CDMs all that much, so I'm curious why the reference oscillator would cause it to not power up, are they also using it as the cpu clock or something?