- Joined Jul 15, 2014
Hi there everyone! I must have tried everything in the settings and diagnostics of the service manual for this Yamaha Model: HTR-3063 or RX-V367 to get the subwoofer output working. Ive tried setting the subwoofer to Yes and speakers to small, etc...The Microcontroller is a R5F364AMNFB the S/W pin on this microcontroller is pin 80, it shows 3.4volts. It goes to Transistor Q2205 which reads 3.4v on all three pins B.C. and E in the first diagram, it should read -11.7v on the collector when off mute and 3.4v when on mute? From there the mute signal goes to Transistor Q209 on the next diagram Im wondering if someone knows if I can somehow cancell the muting signal for just the subwoofer? Maybe if I remove a resistor in the mute signals track? As you can see circuit theory isnt my Forte! Thats why Im asking for advice before I wreck it. This amplifier had been working great until I moved house a few months ago, I bought it new on special for only $225. I contacted Yamaha to speak to a tech but they couldnt help me except to sell me a new digital board for $220. I tried to upload the service manual for the amplifier but its too big @ 16.5MB, size limit is 10MBs. Ive diode tested the SMD transistors with a DMM and they are all good. Any help I can get to fix this will be appreciated for sure.
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