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  1. J

    Marantz Model 140 – Single Filter Capacitor Revision? Both Channels Failed Simultaneously

    Hi everyone, I'm hoping someone here has run across this before because I'm starting to think my Model 140 is a production revision that doesn't match the commonly available service manual. I've been troubleshooting it methodically and trying to avoid replacing parts without evidence, but...
    • jammosherJAM
    • Thread
    • 140 marantz model 140 power amplifier service manual troubleshooting vintage audio
    • Replies: 36
    • Forum: Marantz Audio
  2. 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...
  3. R

    Model 140 rebuild

    Hello all, long long time ago i was 16 and bought a second hand 3200/140 set for 50 euro's and used it for a while in combination with an pm7000 amp to drive my quadral aurum 9 speakers. but my room on campus was waaaay to small for this setup so i took the pm7000 and a couple of B&O speakers...
  4. Richs_Trains

    Marantz 140 amp DBT dead short question

    Hey all, I have a Marantz 140 amp that I replaced some diodes on several years ago because the peak indicators were stuck on. After this fix, the unit worked fine and I had it in the living room on a 3200 for several months with no issues. A couple of years ago I swapped the unit out for a...
  5. Richs_Trains

    Marantz dual cap question

    Hey all, Just a quick question about dual caps. Several Marantz units use dual caps and many on this forum replace them with two single caps. My question is how do you figure the values necessary for the 2 single caps based on the value on the dual cap. Thank you in advance. Rich
  6. L

    Marantz 140 - Buzz/Rumble/hum issues

    Hello there, In the past, I had issues with the left channel of my Marantz 140. I serviced my Marantz 140 as : - Changed the big cap for two 15 000uF 63V Mundorf - Changed all the transistors except the pre driver and drivers on left channel - Changed two diodes on both channels - BIAS and DC...
  7. S

    Best setup for Marantz 2325 and Technics SL-1200MK2

    I currently have a 2325 receiver I’ve been using with my Technics 1200 turntable, Marantz 5010B tape duck, and a Marantz CD-67SE CD player. Speakers being used are a pair of Celestion Ditton 100 and a pair of Celestion D10s. The receiver and turntable have been professionally restored but...
  8. greenflash

    Preamp 3800, anybody using it with two power amps?

    Hi everyone, I have a 140 Power amp without a proper preamp and I'm considering both a 250 power amp and a 3800 pre. Maybe I'd go first for a pre and then for the second power amp. Anyway I've read in the manual that the 3800 is able to "feed" two power amps *simultaneously* Now the seller...
  9. greenflash

    Marantz 1070 instead of 3200 as pre amp with 140 power. Disadvantadges?

    Hi everyone I've finally laid my hands on a Marantz 140 power amp. Quite happy! For now i'm using it with a 1070 integrated amplifier as pre-amp. My final intention is to get a Marantz 3200 to drive the power amp instead of the 1070. But before making that investment I'm wondering if there...
  10. greenflash

    Marantz 140 Power amp temporarily used with 1070 as pre/Power consumption

    Hi guys, I've spotted a nice Marantz 140 power amp that I still didn't receive but the problem is that I have no preamp yet to use with it. Also, the 140 does not have a power knob, so using the (un)switched outlet of another amp seems perfect. I have a 1070 amp (also a 2235B but the 1070 is...
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