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repair

  1. troutmaskrep

    Harman Kardon 330A transistor substitution woes - help needed

    I’m working on restoring a Harman Kardon 330a amplifier that was blowing fuses due to multiple shorted transistors. Among other issues, one of the four CDC8002/9002 “flying saucer” transistors was blown. Following advice from an old thread on a different amplifier model, I replaced all four with...
    • troutmaskrep
    • Thread
    • 330a harman kardon repair transistor substitution
    • Replies: 19
    • Forum: Solid State
  2. K

    JBL L112 paper Cone Repair

    Good Evening, I am in the process of repairing and restoring a pair of JBL L112 speakers which i picked up for just 35€. As you can see, they are pretty beat up, and horrible things have been done to the Woofers :/ Fortunately i have been lucky enough to pick up a pair of JBL 128H-1 for...
    • Klaus1993
    • Thread
    • jbl l112 paper cones repair
    • Replies: 3
    • Forum: DIY
  3. T

    Marantz 7C repair advice - San Francisco Bay Area

    Hi all, I recently inherited a Marantz 7C. After being assured it worked, I foolishly went to turn it on and the light on the front won’t turn on and doesn’t seem to work. Here are the internals/externals. Would anybody know of a place I can go in San Francisco (or the Bay Area generally) to...
    • tommysully
    • Thread
    • amp bay area marantz marantz 7c repair repair advice repair advice help needed san francisco tube vintage
    • Replies: 11
    • Forum: Marantz Audio
  4. J

    AKAI GXC-730D repair advice

    AKAI GXC-730D repair advice My AKAI cassette Deck is not functioning properly and I am requesting advice from the experts. I attached a video link showing the deck's issues.
  5. D

    Bose 901 cabinet repair

    I recently bought a pair of Bose 901 that were sitting in someone's garage and work great, but have severe damage to the cabinets. I'm not committed to spending hundreds to get them redone or anything so I wanted to possibly refinish the veneer myself or put new veneer on. I'm not sure if the...
  6. Dvanamps

    Sansui AU-777 Troubleshooting

    Hi folks, Im currently undergoing a full restore of a beloved Sansui AU-777 amplifier. Have already been following threads by @Leestereo and @KeithD among others to gain better understanding. So far, I have redone the power supply caps and all is sounding good, I can already notice an...
  7. D

    Sony TA-1150 project

    Recently purchased a Sony TA-1150 which I am hoping turns out to be a rocking deal after repairs. I am linking to three videos below showing the problems I am having. I have yet to get in and start cleaning this thing, but my suspicion is it will need a good deal of work beyond that. I am really...
    • dontforget
    • Thread
    • advice help repair restoration sony ta1150
    • Replies: 0
    • Forum: Solid State
  8. B

    Infinity Renaissance 90 - EMIT (and EMIM) speakers - need repair ?

    Hello All, please I need some advice. I plan to buy the speakers in headline, but acc. to photos, the EMIT membranes are warped (please see photos). Of course I plan to see and listen to them, but it is 400 km from my home so I would like to know some advices before I run for them... Is this...
    • booqman
    • Thread
    • emit infinity renaissance 90 repair
    • Replies: 9
    • Forum: Speakers
  9. T

    Good (usb?) Micro scope for inspecting styli?

    I have a ton of cartridges, all of which are second hand. The condition of the styli is up in the air and I have no clue which are good and which aren't. I would like to know and I have been reading up on how to check for wear. I would like to try doing it myself and since I also sell cartridges...
  10. T

    Nakamichi lx-3 cassette deck doesn't record, orange cap issue?

    I have a nakamichi lx-3 that plays back perfectly, it engages record mode and the mechanical part engages the record switch fine. However when the tape is played back it seems nothing has happened. No erasure or new recording at all. The master fader ande record functions are also completely...
  11. T

    Fostex 280 motor defective? Tips on external testing wanted.

    The capstan motor doesn't seem to be doing anything. I tested it with play engaged with all possible combinations of the micro switches, both pressed, both depressed, one pressed one depressed and vice versa. I would like to test it with an external power source but I don't know how to...
    • TrevorBarten
    • Thread
    • 4 track fostex fostex 280 repair
    • Replies: 4
    • Forum: Tape
  12. B

    Trash to Treasure - JBL L40

    Just some midnight fodder...... A few years ago, I was assigned a side job to clear out a home that was going up for sale. The deceased owner was a hoarder and had filled the house with A LOT of everything..... It was my job to trash as much as possible before the house went on the market. I...
  13. T

    Sony ps-x700 muting relay replacement?

    I bought a ps-x700 from Japan and it arrived today. I cleaned it, replaced the size detection light, and did some general checks. It is fully functional except for the muting relay. I currently have just removed it to be able to use the recordplayer. I don't really care that much however I think...
  14. quadmatrix82

    Marantz 2500 repair help

    Hi Marantz 2500 experts, I am currently working through repairing my Marantz 2500 and wondering if anyone has noticed how bright the dim bulb runs with a 150 watt globe, my 2500 clocks out of protection but the dim is glowing but wondering if this is normal given it’s high power consumption...
  15. T

    sony tc-k950es push stop buttons (calibration and hx pro) replacements/repair?

    I was working on a tc-k333esg (k950) and while disassembling the front panel I accidentally broke both push buttons because I pulled the plastic covers off while they were pressed in. This caused the retaining bracket on the blue plastic pieces to break which means that the buttons cannot be...
    • TrevorBarten
    • Thread
    • help repair sony sony es tc-k333esg tc-k950es
    • Replies: 2
    • Forum: Tape
  16. T

    Kenwood kr-9050 aux input

    Hello, I recently received a Kenwood kr-9050 and I have come across an issue, when I plugged in a pair of rca cables into the aux input, I noticed that the port would move slightly in ward compared to the right port not having any movement, I then went and began playing music through the aux...
  17. Roman68

    Oil change in Telefunken st 850.

    Good afternoon. I would like to ask about changing the oil in the engine of this turntable. A couple of days ago I bought a Telefunken st 850 for 15 euros. It turns on, maintains speed, the tonearm works, I washed the bearings in gasoline. I am interested in the issue of engine maintenance...
    • Roman68
    • Thread
    • hi fi motor plattenspieler repair service telefunken telefunken st 850 turntable vinyl
    • Replies: 18
    • Forum: Turntables
  18. I

    Kyocera D-801 fast forward + rewind broken. 1) How to replace belt. 2) How to fix FF/RW.

    I have a Kyocera D-801, and everything seems to work except for fast forward and rewind. I plan to replace the belt, but first I want to solve the FF/RW disfunction if possible. I have a video of the disfunction attached. Does anyone know how to solve this? And while I’m here, does anyone...
    • IEATBOOKS123
    • Thread
    • belt does not rewind fast forward how to change belts repair repair advice help needed rewind rewind problem
    • Replies: 1
    • Forum: Tape
  19. T

    Sony ta-n80 channel blown, cause?

    I made a post a few hours ago about getting the bias correct on my ta-n80 amplifier. I ended up setting the bias after the amp had fully warmed up and everything seemed fine, it kept the bias well and didn't do anything weird. So after this I turn it off, go to test it and get no sound. I tried...
    • TrevorBarten
    • Thread
    • blown channel power amplifier repair sony es
    • Replies: 5
    • Forum: DIY
  20. I

    Amplifier repair shop for Hafler 9505 near Chicago

    I have a Hafler 9505 that has a turn off thump. I've taken it to a few shops and none of them have been able to fix it. Wondering if anyone here has a specific suggestion for a repair shop or tech that could fix this amp. For whatever reason the places I've taken it too claim to be able to work...
  21. T

    JBL decade l16 repair advice?

    I just purchased a pair of jbl decade l16 speakers. I know they are some of the cheaper jbl speakers but I would still like to get them back to original spec, or better as long as it doesn't require significant investment/work. I will be refoaming the speakers and I also want to service the...
  22. jFF_Bulbo

    marantz 4240 pop

    hello everyone. I have a Marnatz 4240 under repair, the left amplifier failed and I was able to repair it, however a problem appeared that I had not noticed before working on it. When the selector (S001) is placed on the FM input, when the speakers are activated, it emits a very loud noise, even...
    • jFF_Bulbo
    • Thread
    • 4240 help marantz marantz trouble pop sound repair
    • Replies: 1
    • Forum: Marantz Audio
  23. S

    Marantz Audio Test and Repair Recommendation in Southern California

    Hello Everyone. This is my first post…so take pity on me but be kind! I have a Marantz 140 Power Amp, a 250 Power Amp, and a 3200 Preamplifier. The 140 and 3200 were in excellent cosmetic condition…but they required service due to failed capacitors (The 3200 was possibly NOS…in its original...
  24. MorrisonAgen

    Trouble with a Technics SL-1600 MK2

    Hey all! I’m working on a SL-1600MK2 for a friend, and I’m having an odd issue that I am hoping someone here has run into and solved. I have both 33 and 45 lights coming on simultaneously, and the platter is spinning back and forth erratically. I have re-recapped the motor board and the...
  25. scootsity5

    Allison Acoustics drivers

    Hello all I demod a pair of Allison CD-9s today, and was absolutely blown away by them. Unfortunately, I heard a bit of distortion (maybe rub between the voice coil and the Magnet?) in one of the mid drivers (it sounded staticy). Given their odd shape and design, I assumed those things are...
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