Hi,


the sequencer of this TR707 is not running anymore :
-The sequence do not start , and is no more a TEMPO indicated on the Lcd screen
-There is also troubles for choosing the SYNC mode ( SYNC MODE while holding SHIFT key).

So there is maybe a fault on the voice board Around the TEMPO CLOCK or/and TEMPO CLK SEL or around the GATE ARRAY But where exactly wich componant
Any help is welcome, online service manual is here : http://www.synfo.nl/servicemanuals/Roland/TR-707_SERVICE_NOTES.pdf
schematics are on page 10.
I have scope and multimeter.

When i try to change Tempo , voltages are mooving before TM1 but not after; Could it be a clue
Thanks to all