Got a bunch of Motorola Minitor V pagers from Fire Departments here trying to fix some out of the non working ones. These pagers are known for either no sound / audio or they don't charge. The internet is full of suggestions like metal shavings inside the speaker? 
Anyway so I took one of the Minitor's apart for my amusement in order to see why that is and nobody can fix em.
There are no service manuals or schematics for these that I know of. However… I did find the problem!
On the main board of this unit where the speaker connects to there is a metal shield. Either pry one corner open or take she shield off (see pictures). Right in there is a SOP-8 IC marking 701. That is a TDA701 low audio amp and it's bad on mine.
i took the IC out of a non charging one and put it into one that has no sound. Works A1!
Anyway so I took one of the Minitor's apart for my amusement in order to see why that is and nobody can fix em.
There are no service manuals or schematics for these that I know of. However… I did find the problem!On the main board of this unit where the speaker connects to there is a metal shield. Either pry one corner open or take she shield off (see pictures). Right in there is a SOP-8 IC marking 701. That is a TDA701 low audio amp and it's bad on mine.
i took the IC out of a non charging one and put it into one that has no sound. Works A1!
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