JimmyTheDonutClerk
Member
HELP! My Tascam M-216 has a faulty VU meter needle. How do i locate and diagnose the cause?Hello im in grave need of some help from a experienced tech wizardly advice on this one! To be specific, the problem we're trying to solve is my Tascam M-216 mixers vu meter needle (VU METER 1 dont react with movement when sending audio to it. The OL lamp gets a signal though and reacts and lights up when playing signals through pgm 1, that tells me that the signal is at least reaching the PCB so thats good.
The other vu meters (2,3 and 4) works perfectly fine and i can tell that the needle isnt stuck or sticky. Ive removed the meter PCB from the mixer and have them disconnected, i have the service manual with all the diagrams and so forth. but i don't know how im supposed to locate where the the fault lies on the PCB. I've ruled out that the the rot of the problem is on Meter 1/2 PCB, somewhere cause the peak lamp gets signal and meter 2 works fine. And if im correct i do believe that the signal splits of into the peak indicator and then to the meter coil right? so i think it's the R911 that isnt working. But im just making an assumption here.
So is there anyone who could help me locate the problem and solve it.
i have a multimeter, soldering iron and everything. but where should i begin? And what do yall believe the fault could be? should we do a continous test or a resistance test first and which diods should we start with? Do i need to de solder the vu meters thats blocking the side of the pcb that has all capacitors and so forth or could we find the problem on the solder joint side of the pcb?
I've included the manual and pictures of the meter PCB in question, the one that ive removed from my m-216.
Tascam m-216 schematics and service manual
The other vu meters (2,3 and 4) works perfectly fine and i can tell that the needle isnt stuck or sticky. Ive removed the meter PCB from the mixer and have them disconnected, i have the service manual with all the diagrams and so forth. but i don't know how im supposed to locate where the the fault lies on the PCB. I've ruled out that the the rot of the problem is on Meter 1/2 PCB, somewhere cause the peak lamp gets signal and meter 2 works fine. And if im correct i do believe that the signal splits of into the peak indicator and then to the meter coil right? so i think it's the R911 that isnt working. But im just making an assumption here.
So is there anyone who could help me locate the problem and solve it.
i have a multimeter, soldering iron and everything. but where should i begin? And what do yall believe the fault could be? should we do a continous test or a resistance test first and which diods should we start with? Do i need to de solder the vu meters thats blocking the side of the pcb that has all capacitors and so forth or could we find the problem on the solder joint side of the pcb?
I've included the manual and pictures of the meter PCB in question, the one that ive removed from my m-216.
Tascam m-216 schematics and service manual
