Pioneer!
Active Member
Hi AK,
I have been messing around with the above unit for a few days now. When I originally got it, it seemed to have an issue with the Muting board being intermittently operable, turns out the connector had some dry joints on it, so got that fixed up just fine.
What's bothering me though, is the volume drive motor has given out on me, not really sure why. Suspected it was a dry joint or something so I resoldered all relevant connections, then tested each one for continuity and resistance from point-to-point (I don't entirely trust my meter's continuity test).
When I press UP on the remote, i can indeed see the voltage on the VOL UP pin rise to 4.3VDC, and this change is seen at the motor as well. When I press DOWN, I am only getting about 0.3VDC at the pin and on the motor. There is a +5V pin on this header that I simply cannot figure out the power source of, but that reads 0VDC, something seems amiss with Pin 1 (+5V) and Pin 2 (VOL DOWN). Here is some snips of the schematic, I can upload full pages if needed.
Thanks in advance.
Pins 8 and 4 on the IC seem to be where the 4.5V passes through to the motor on vol down.
I have been messing around with the above unit for a few days now. When I originally got it, it seemed to have an issue with the Muting board being intermittently operable, turns out the connector had some dry joints on it, so got that fixed up just fine.
What's bothering me though, is the volume drive motor has given out on me, not really sure why. Suspected it was a dry joint or something so I resoldered all relevant connections, then tested each one for continuity and resistance from point-to-point (I don't entirely trust my meter's continuity test).
When I press UP on the remote, i can indeed see the voltage on the VOL UP pin rise to 4.3VDC, and this change is seen at the motor as well. When I press DOWN, I am only getting about 0.3VDC at the pin and on the motor. There is a +5V pin on this header that I simply cannot figure out the power source of, but that reads 0VDC, something seems amiss with Pin 1 (+5V) and Pin 2 (VOL DOWN). Here is some snips of the schematic, I can upload full pages if needed.
Thanks in advance.
Pins 8 and 4 on the IC seem to be where the 4.5V passes through to the motor on vol down.
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