yamaha
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CR-1020 Needs Some Minor Help
Hello all, So I just picked up a 1020 that has some minor issues. Bulbs out, channels cutting in and out, dirty switches, etc. It seems like nothing major at first, so far. I can not find all that many troubleshooting threads here, other than the one or two from Rob. Any tips on problem areas...- Saint Johnny
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- 1020 nyc yamaha
- Replies: 5
- Forum: Yamaha
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C4 preamplifier dc fluctuation
My C4 is sounding great but despite replacing the trimpots with Bourns the dc fluctuates quite energetically between -170mV and +180mV. Occasionally it will even stray further by another 100 or 200mV. Thoroughly checked all solder joins, switches cleaned etc. My question: are there any...- Hifibythekg
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- c-4 capacitor dc current preamplfier transistor yamaha
- Replies: 24
- Forum: Yamaha
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Yamaha A-1000, A-700 PSU Modification - Complete Basic Solution
As a continuation of the thread: https://audiokarma.org/forums/index.php?threads/yamaha-a-1000-can-i-remove-the-whole-vertical-phono-board-and-everything-else-will-still-work.962306/#post-15203392 I've decided to develop a complete basic solution for power system modification in Yamaha A-1000... -
Yamaha CR-620 - Right Channel Popcorn Static
Acquired a CR-620, my first after a series of 400's and 420's, fun to get to know a new model! This particular unit had a bad output transistor, blowing the main fuse, so I upgraded/replaced all 4 with MJ21193G's and MJ21194G's, which solved the problem, but now I have persisting popcorn static... -
Yamaha CR-420 Dead Tuner
Picked up a CR-420 that initially tested fine across the board - tuner, phono, Aux, etc. But then the tuner stopped working all together - no led's, no signal meter movement, no sound on AM or FM. Now, it didn't just die, it kicked and screamed a bit, I thought it was dead, then it came back to... -
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Metal film resistors- Yamaha A1
Need to replace some 1.5Kohm resistors in the Drive board of a DC coupled Yamaha A1 amp. Originals were carbon, anything inherently wrong or risky in using good quality metal film resistors which I have in stock?- Hifibythekg
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- a-1 amplifer resistor yamaha
- Replies: 37
- Forum: Solid State
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Speaker wiring - questions - Yamaha A-700
Beginner questions on ohms & watts. Yamaha A-700 amp (1983). 4 speaker terminals. Terminals state: A or B 6~16 ohms/spkr A + B 12 ohms min./spkr (See pic) Can I hook up four 8-ohm speakers? (One to each terminal?) Amp is 100w / channel: Does each of the 4 spkr terminals have its own 100w...- Shredded
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- a700 yamaha
- Replies: 9
- Forum: General Audio Discussion
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Yamaha C-4 preamp hum.
This amp appears to be working well in all regards except that there is a significant hum when Phono is selected. The hum also comes through substantially on Aux and Tuner. Hum appears to be stronger through the left channel. Hum is lessened when ’Tone Bypass’ is selected, but...- Hifibythekg
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- c-4 grounding hum yamaha yamaha c-4
- Replies: 12
- Forum: Yamaha
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Yamaha C4 - D.C. ranging 10mV- 350mV
Finally got a C4! Working, sounds great straight away. However doing the adjustments, and even after installing Bourns trimpots, the DC on both channels ranges from approx 10mV to 350mV. Very steady rise and fall over the course of a minute or two. DC is rock steady at 35.2V Question: Is there a...- Hifibythekg
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- c-4 preamp yamaha
- Replies: 2
- Forum: Yamaha
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Help Bring Long Dead M-80 Back to Life
I have a Yamaha M-80 that I received in non-working conditions a couple years ago. It has not been operated in at least 15 years. It was pretty filthy and in poor condition. The DSBG had damaged parts on both channels. The left output transistors were shorted. Several of the 5W emitter... -
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3D printing replacement hinge for Yamaha A1
Can anyone recommend a low cost 3D printing service that doesn’t have a prohibitively high minimum order price structure? Am UK based. Have the scan file and just want to create two plastic hinge sections on a Yamaha A-1, they’re only about 1cm square by 4mm.- Hifibythekg
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- 3d printing hinge yamaha yamaha a-1
- Replies: 3
- Forum: Solid State
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Four devices, 4 places to adjust volume - which to prioritise?
My set up has four locations at which volume can be adjusted. In theory, which devices should have their outputs used to maximum, and which to the minimum? Not seeking a loud level of sound, there are neighbours, just the best possible sound quality. 1- Sony Bravia television. Tidal...- Hifibythekg
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- celestion 66 chord hugo ditton 66 optical audio sound quality usb audio yamaha yamaha c-4 yamaha p2200
- Replies: 19
- Forum: Solid State
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Resistors. How to determine voltage and other spec.
Need to replace some resistors on aYamaha A-1 amp. The Service Manual simply says they’re “Carbon 330ohms” but when ordering additional specs are offered such as: -power rating? -resistance tolerance? -voltage rating? Can anyone advise what I should be seeking for each of the above. (And how...- Hifibythekg
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- a-1 resistor yamaha yamaha a-1
- Replies: 10
- Forum: Solid State
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Dummy load for adjusting a Yamaha A-1 integrated
Please could anyone direct me to the simplest and most economical way of using a dummy load to set the adjustments of bias and offset on an integrated amplifier? The service manual just say connect a "dummy load resistance (70W) to the speaker terminals." Searched but just can't find any visuals...- Hifibythekg
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- a-1 dummy load yamaha
- Replies: 10
- Forum: Solid State
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Fuse resistor substitute 68ohms 60mA
There is a a 68 ohms 60mA fuse resistor found in the Yamaha A-1 and other Yamaha amps of the same period. Could anyone tell me what is the best substitute?- Hifibythekg
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- a-1 fuse fuse resistors resistor yamaha
- Replies: 24
- Forum: Yamaha
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Yamaha Natural Sound Stereo Amplifier A-7
Hey guys first post/thread here, need some help. Recently purchased this Yamaha Natural Sound Stereo Amplifier A-7, which as far as I can tell is a Japanese Domestic Market model of the A-960 which means it runs on 100V. I live in a 230V country, so I used a step down transformer rated at 110V... -
Yamaha CA-1010 Major Restoration
Hello all, I feel it's about time that I sit down and document my major restoration to my Yamaha CA-1010. This year I have done 6 major restorations on these units, 2 of them being on its big brother, the CA-2010, that has a lot in common. For those that need more info on the 2010 restoration...- Will_Emanuel
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- ca-1010 rebuild recap restoration yamaha
- Replies: 75
- Forum: Yamaha
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Yamaha A1 restoration 2021
Hi all. First question. Want to discharge those two big caps before I touch anything... Please can anyone tell me exactly how best I should perform this procedure? Apparently it was switched on in the last couple of days.- Hifibythekg
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- amplifer capacitor yamaha yamaha a-1
- Replies: 463
- Forum: Yamaha
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Speakers for Yamaha WXA-50
Hello folks, I have to relocate my Yamaha WXA-50 to a different room and thought that I may need another set of speakers to go along (going from smaller to slightly larger room). Currently I have Totem Mite’s connected since I bought the amp and they are a good match for WXA-50, at least when... -
Best Looking Vintage Amps/Tuners/Receivers plus sound rating 1-10
Hey guys, thought this might be of some interest. I bought an au-666 and tu-666 Sansui combo because it looks amazing and the audio properties sounded fair also. What vintage kit does everyone else find visually beautiful? And how does the sound match? Do receivers look better than...- TunerLanding
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- luxman marantz pioneer sansui yamaha
- Replies: 0
- Forum: Solid State
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Yamaha RX-V1400 Speaker hum
Haven't used this receiver a whole lot. I had noticed a hum from the speakers a while back, and thought I had got rid of it, or maybe I just forgot about it. Anyway , I noticed it again recently. The hum is what appears to be a 120hz hum, and is from the speakers only. It is from all the... -
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Amplifier - 110V to 240V mains transformer
Mains voltage in the UK is 240V. If I want to use an integrated amplifier of 400W or so and it’s spec is 110V.... what type, or level of quality do I need for a step down transformer? What specs should I be looking for in the transformer? Presuming that I can’t just plug in a 110V travel adapter...- Hifibythekg
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- amplifer step down transformer voltage yamaha
- Replies: 7
- Forum: Solid State
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Yamaha A-1 using ‘pre-out.’
Hi, helpful fellow AKers have pointed out that the signal from the pre-out on the well-regarded ‘Yamaha a-1 integrated amp’ (note, not the DSP-A1) has to navigate the power section before arriving at the RCA sockets. This routing suggests that the pre-out’s signal quality will be comprised...- Hifibythekg
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- pre amp pre amplifier vintage. pre out yamaha yamaha a-1
- Replies: 6
- Forum: Yamaha
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complete Yamaha System or upgrade turntable
Hello Long time follower first time post. I getting into vintage audio and had saved a few dollars and I was wondering on advice on improving the sound experience. I currently have amp - Yamaha cr 800 turntable - yamaha ypd4 - shure m75hd Cartridge speakers - Technics sb 7000a - non stock...- Adam nem
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- ariston rd 11s technics technics sb-7000 yamaha yamaha cr 800 yamaha cr 600 yamaha ns690 speakers
- Replies: 6
- Forum: General Audio Discussion
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Yamaha B-2 restoration Chicago
Hello all, I’ve recently come across a Yamaha B-2 in quite nice shape. Everything seems to be working properly as it produces sound (from videos sent to me), and quite good sound at that, as the seller almost had second thoughts. Reading through numerous threads about the B-2 on this forum it...