Bammel TV Technology Services
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SONY SHAKE-99 REPAIR at BAMMEL TV TECH SERVICES

In for service, a Sony Shake-99 audio/video system. Customer indicated a complaint as follows: CD STUCK…RECEIVER OUT—NO SOUND. This large-format product (see video) ROCKS! at both low and high volume. It has almost 5000 watts, with smartphone control, wireless bluetooth connectivity, included DJ and lighting effects—overall, a very nice product, and one we had not previously seen.

Our technicians spent the required diagnostic time with this fantastic, club-level system. Working together, our team of skilled technicians resolved successfully the customer’s complaints: we fixed the CD mechanism issues by sheer expertise, and a process of re-alignment, while the Shorted Receiver complaint we were able to locate the culprit and faulty component—namely a faulty transistor on the Main PCB power supply.

For our main Stereo & Electronics Repair Service Page, click here. For our Pro Audio repair page, click here.

Summary: Shake-99 Repair at Bammel TV Tech Services

Just another routine day as the world’s greatest repair shop. Need service? Call the professionals—call Bammel TV!

Bammel TV Technology Services
/ By admin / Guitar Effects RepairPro Audio Repair / / 0 Comments

RACK GUITAR PEDAL REPAIR: LINE 6 POD PRO REPAIR, ROCKTRON PROPHESY REPAIR, DIGITECH GSP2101 REPAIR

June 10, 2016

Our report on three repairs performed on a customer’s Line 6 Pod Pro, his Rocktron Prophesy, and his Digitech GSP2101.

This customer owns ALL THREE of these classic units! It’s guitar pedal repair time at Bammel TV Tech Services!

Pod Pro Repair

The Pod Pro is a classic 2-rack space effects unit from Line 6. Capable of multiple simultaneous effects of the classic sorts: distortions, delays, dynamic effects, tremolo, wah, reverb, pitch shifting—a wide tableau—no, make that a panoramic sweep of tones. With dual XLR-outs as well as digital outs, and multiple possible input configurations, these were excellent machines. We haven’t seen very many, but as the authorized service center/master service center in Houston for Line 6, when those products need some TLC and attention, we’re the destination of choice for the customer.

In this case the Pod Pro exhibited periodic loud screeching noises—obviously hideously unacceptable for a guitarist. Specifically, the customer complained of a “Works 12 seconds, screeches 12 seconds” phenomenon. Our master techs would have liked to get the Main PCB for this repair, but it was NLA from Line 6. That left us scratching our heads…We came up however a solution: we REPAIRED the main PCB assembly fault. We ordered up an IC from China and were successful at restoring this high-quality unit.

Rocktron Prophesy Repair 

The same customer also brought in a Rocktron Prophesy—one of the classic units designed by Tom Scholz of Boston.  This unit was simply dead, exhibiting a no-power symptom. We isolated and replaced seven discrete faulty components, and unit is restored and back to proper operation.

 Digitech GSP2101 Repair

Finally, customer also brought to us his Digitech GSP2101—another rack-mounted classic effects unit (and one of our personal favorites.) The 2101 was/is/remains legendary due to two 12AX7 vacuum tubes (or valves, as our British friends call them)in the preamp section, permitting a wide range of natural analog tones, from crystal-clear-clean to radically saturated distortions—that’s in addition to a huge range of digital effects, on top of an analog compression/EQ/gating stage. Altogether a wonderful unit, which fortunately in this case required only minimal service to restore.

Summary: When you need guitar pedal repair… 

Three more bite the dust, courtesy of your crew at Bammel TV Tech Services. For our main Pro Audio repair page, click here.

Bammel TV Technology Services

How We Fixed a 24 Track MCI JH-24 Recording Deck

How We Fixed a 24-Track Studio Recording Deck

Customer brought to us an early-1980’s vintage studio recording deck: a 2″ tape, 24-track recorder—the MCI JH-24.

The MCI JH-24 is a rather legendary studio multi-track recorder—a very impressive piece of equipment, the first commercialized 24-track recorder. Many rock classics were recorded on MCI machines: Eric Clapton, the Eagles, Led Zeppelin, and the Bee Gees recorded many of their 1970’s era hits on MCI 16-track machines. The JH-24 carried an original purchase price in the $30,000 range. Even today working units are being sold online for over $8000, not including freight.

By the early 1980’s digital recording was emerging on the horizon, but many artists then, and still today, prefer the perceived “warmth” of analog recording equipment. And so we found ourselves facing a non-functioning JH-24 deck—the first one we have seen.

Assessing the Repair Prospects on the MCI JH-24, and Phase 1

Customer’s complaint was that “Tape transport won’t function.”  Our diagnostic assessment found the following:

“MAJOR RECONSTRUCTION REQUIRED in POWER SUPPLY, STANDBY CIRCUIT WORK, and SYSTEM CONTROL CIRCUIT. ADVANCED TROUBLESHOOTING PLUS REPLACE OF MISC COMPONENTS INCLUDING DISPLAY LAMPS—HOWEVER IT IS OTHERWISE IN GOOD SHAPE AND REPAIR IS FEASIBLE & RECOMMENDED FOR REPAIR.”

After considerable efforts by one of our master technicians, our repair essentially stalled out—“I can’t fix it.” Despair set in. Eventually I transferred the ticket to our other master tech and assigned him a full time assistant for this challenge. The risk was considerable: should he and his team flame out, and the unit prove unrepairable, this would represent a large loss of valuable repair production time.

Phase 2: Breakthrough

The second tech team completed the remaining work, but having done so, we ran into additional complications with this very complex product. Customer had requested that at least 16 of the original 24 tracks be restored. As it turned out, each individual recording track presented individual electronic circuit issues. Both our master techs worked on the unit, and were finally successful in restoring 23 of the 24 tracks, each of which required individual troubleshooting and circuit repair, for a total repair cost below $4000—thus saving the customer over $4000 off the cost of purchasing a replacement.

Summary: We Fixed It

Finally, we presented the triumph to the customer: a restored, functioning MCI JH-24, at just half the cost of a working replacement. Just another save-the-day at Bammel TV Tech Services. For our main Pro Audio repair page, click here. Click on the video player below for a brief video review of the final, functioning unit.