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McIntosh Audio A Tradition of Excellence |
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Thread Tools | Display Modes |
#1
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Anyone ever heard of this Mac preamp problem?
Mine is a C220 having this issue.
The display is garbled with all sorts of unusual characters........when rotating the input selector. The unit still appears to work. At times it comes on by itself. I have tried the reset procedure and it doesn't change anything. Some display s are normal such as at power up it says "Tube warmup" correctly. The remote brings up some normal displays as well such as trim and balance. For the most part, when it is playing I can't see what input is active. Have to go by the sound.
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McIntosh: C220, MC402, MC206, MC8207, MC2100 (x2). Klipsch: KPT-MCM-II-Q-THX, KPT-Jubilee/535-B, + more Klipsch |
#2
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If you have tried resetting and that didn’t fix it, it is time to have McIntosh look at it.
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#3
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Or you can take it to Terry DeWick in Tennessee.
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_________________ - Michael Amp: MC1.2KW x 2, MC602, MC2300 Preamp: C52, MX136, C34V Digital Source: Oppo BDP 105, Pioneer 47Ai, CAL MkII Analog Source: MT10, Technics RS 1700 Speakers: VMPS Super Tower lll Subwoofer: JL Audio F113 Power Cables: Wireworld Platinum Electra 7 Speaker Cables: Straightwire Serenade ll Signal Cables: Wireworld Silver Eclipse 7 Power Isolation: RGP 1200C Rack: Adona Eris 9TW modified to Eris 12TW Amp: Yamaha RX Z9 Digital Source: Pioneer BDP 94HD, Oppo UDP-205 Front Speakers: Monitor Audio Center Speaker: B&W CC6 Rear Speakers: B&W DM 602 Surround Speakers: B&W DM 602 Subwoofer: Velodyne SPL 12BV Television: Samsung 75 inch 4K Q90R |
#4
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Terry DeWick has a 90 day backlog as of 10/5. If you can’t wait look elsewhere.
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#5
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Terry has reworked a few older Macs for me. I was thinking about Audio Classics. Hate to ship it to NY but what else to do? I will probably land it on my bench and take a peak inside to see if anything can be cleaned and re-seat connectors prior.
Very handy Ivan having the service manuals here (thanks). I already went through it. C220 is a dang computer.
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McIntosh: C220, MC402, MC206, MC8207, MC2100 (x2). Klipsch: KPT-MCM-II-Q-THX, KPT-Jubilee/535-B, + more Klipsch |
#6
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Yeah, AC will probably be your best bet. That's the problem w/microprocessor based equipment, unless it's something simple like a loose cable, you need a pro.
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#7
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Quote:
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Ivan FLORIDA MX136, MC1.2KW(10) MC2KW(2), MCD1100, MS750(2) MVP881, C1000C/P/T, MPC1500, HT-2 SUBS(2) HT3F(2) WS350(2) XRT2K, XCS2K, XR27(2) XCS350(2) JL GOTHAM v2 SUBS(2) SILENZIO MUSIC SERVER, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" MOTORIZED SCREEN, CINEMA-TECH SEATING, WW PLATINUM CABLES Reference System: ACCUPHASE A300 AMPS, C3900 PRE-AMP, DP1000 CD/SACD TRANSPORT, DC1000 DIGITAL PROCESSOR, DG-68 DIGITAL EQUALIZER, T1200 FM STEREO TUNER, PS1230 POWER SUPPLY, HRS-SXR CUSTOM RACK w/ M3X SHELVES, TAD REFERENCE ONE MK2 LOUDSPEAKERS, WW PLATINUM CABLES CAPE COD MX150, MC501(2) MC1.2KW(10) MC2301(2) MR88, MVP881, MCD1100, MDA1000, C1000C/P/T, MPC1500, ESOTERIC K-01X 30th ANNIVERSARY (BLACK) SACD/CD PLAYER, G02-X CLOCK, HT3F(2) XRT2K, XCS2K, XR27(2) JL GOTHAM v2 SUBS(2) JL FATHOM F113v2 SUBS(4) SOUND ANCHOR STANDS(2) KALEIDESCAPE STRATO & TERRA SERVERS 80-TB, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" SCREEN, SONUS FABER STRADIVARI, SILENZIO MUSIC SERVER, FORTRESS SEATING, WW PLATINUM CABLES Analog Rig: CLEARAUDIO INNOVATION WOOD, UNIVERSAL ARM w/ Da VINCI' CART, 2nd UNIVERSAL ARM w/ GOLDFINGER STATEMENT CART, HRS-MXR REFERENCE RACK-GLOSS BLACK w/ M3X SHELVES, AESTHETIX RHEA SIG PHONO-PRE, BRYSTON BHA-1 HEADPHONE AMP, WW PLATINUM CABLES Reference System: BURMESTER 911MK3 AMP(3), 088 PRE-AMP, 089 CD PLAYER, 100 PHONO PRE-AMP, 948 POWER CONDITIONER, ACCUPHASE DG-68 VOICING EQUALIZER, AVID ACUTUS REFERENCE SP TT, GRAHAM PHANTOM II SUPREME ARM, BENZ MICRO LP-S CART, GRANDIOSO P1X/D1X STACK, G1X RUBIDIUM MASTER CLOCK, N05 NETWORK PLAYER, SILENZIO MUSIC SERVER, HRS-SXR CUSTOM RACK w/ M3X SHELVES, SONUS FABER AIDA SPEAKERS, JL FATHOM F113v2 SUBS(2) SOUND ANCHOR STANDS(2) WW PLATINUM CABLES Library System: GRANDIOSO M1 MONOBLOCK AMPS, C1 LINESTAGE PRE-AMP, K1X CD/SACD PLAYER, G1 MASTER RUBIDIUM CLOCK, E02 PHONO-PRE, SILENZIO MUSIC SERVER, AERIAL ACOUSTICS 20T V2, AERIAL SW12 SUBS(2), CANTON REF K1’s, VPI HRX TT w/ SDS POWER SUPPLY, ORTOFON CADENZA BLACK CART, KLAUDIO RCM, SHUNYATA DENALI 6000/S v2, SHUNYATA OMEGA QR’s, WW PLATINUM CABLES Esoteric/Bryston System: ESOTERIC C02-X PRE-AMP, P-02X TRANSPORT, D02-X DAC, G02-X CLOCK, BRYSTON 28B3 CUBED MONOBLOCK AMPS(4), BRYSTON BHA-1 HEADPHONE AMP, SHUNYATA DENALI 6000/S v2(2) EVEREST 8000 POWER CONDITIONER(2) ALTAIRA CG & SG HUBS, AMR-DP777-SE DAC, SILENZIO MUSIC SERVER, TAD REFERENCE ONE MK2 LOUDSPEAKERS, QUADRASPIRE RACK, WW PLATINUM CABLES Accuphase/Canton System: ACCUPHASE E800 INTEGRATED, DP570 CD/SACD PLAYER, T1200 FM STEREO TUNER, DG-68 VOICING EQUALIZER, PS530 POWER SUPPLY, CANTON REF K3’s, CANTON REF K5’s, SILENZIO MUSIC SERVER, HRS MXR REFERENCE MAHOGHANY RACK w/ M3X2 SHELVES, WW GOLD CABLES |
#8
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I had something similar when I had a MAC6700 and had to have my local dealer reload the firmware.
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McIntosh C2500 pre amp, MC452 power amp, Autonomic MMS-5A server, PS Audio P15 power plant, DirectStream DAC, DirectStream CD transport, Focal Sopra No2 speakers, JL Audio F113V2 sub woofers (2), Sennheiser HD800 headphones, Dell laptop iTunes/Tidal/Roon, Wireworld cabling |
#9
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I'm not certain whether Terry tends firmware related issues.
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#10
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I have been traveling and when home listening to my other systems. Saturday it will undergo inspection on my bench just to see if it is something simple. Otherwise and more than likely into the boxes and away it goes to AC.
__________________
McIntosh: C220, MC402, MC206, MC8207, MC2100 (x2). Klipsch: KPT-MCM-II-Q-THX, KPT-Jubilee/535-B, + more Klipsch |
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