Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 20 March 2019

JBL GTO301.1 - GTO601.1 - GTO1201.1 - INSTALLATION - WIRING - SCHEMATICS - TROUBLESHOOTING TABLE

INSTALLATION & SETUP
Setting the Crossover [s]

Determine your system plans and set the crossover mode switch accordingly. If you plan to use the GTO75.2 or GTO75.4 to drive full-range speakers, set the crossover mode to FLAT and skip to “Setting Input Sensitivity.”
Initially set the crossover frequency control midway. While listening to music, adjust the crossover for the least perceived distortion from the speakers, allowing them to reproduce as much bass as possible.
Systems using a separate subwoofer set the crossover mode to HP (high pass) for your full-range speakers. Adjust the crossover frequency to limit bass and provide increased system volume with less distortion.
For subwoofers, choose the highest frequency that removes vocal information from the sound of the subwoofer.
If using the GTO75.2 or GTO75.4 to drive a subwoofer(s), set the crossover mode to LP (low pass).

NOTE: The GTO301.1, GTO601.1, GTO1201.1 and the subwoofer output of the GTO755.6 are low-pass only and do not have a crossover mode switch.
SETTING INPUT SENSITIVITY

Initially turn the INPUT LEVEL control(s) to minimum (counter clockwise).
Reconnect the (–) negative lead to the vehicle’s battery. Apply power to the audio system and play a dynamic music track.
On the source unit, increase the volume control to 3/4 volume. Slowly increase the INPUT LEVEL control(s) toward three o’clock until you hear slight distortion in the music. Then reduce the INPUT LEVEL slightly until distortion is no longer heard.

NOTE: After the source unit is on, red LEDs (on the top panel) will light, indicating the amplifier is on. If not, check the wiring, especially the remote connection from the source unit.

REMOTE LEVEL CONTROL

The GTO755.6 and all three GTO subwoofer amplifiers have inputs for an optional remote level control (RLC). This will allow the amplifier’s input level to be adjusted from the listening position. Connect the optional remote level control using the RJ-11 jack on the side of the amplifier. Install the control module in the front of the vehicle within easy reach of the driver. Under the dash or in the center console are both suitable locations.

THE BASS BOOST SETTING

The GTO755.6, GTO301.1, GTO601.1 and GTO1201.1 are all equipped with a bass-boost control. This allows you to adjust the bass output of your system at 50Hz up to 12dB and enhance low frequency.

AUX OUTPUT

GTO amplifiers (except GTO755.6) are equipped with full-range outputs that can be used to connect additional amplifiers. NOTE: When using the high-level inputs, the AUX outputs can be used to pass a line-level signal to another amplifier.

Control end panel {Click on images to Magnify}

INSTALLING NEON TUBES

Using a Phillips screwdriver, remove all screws on the amplifier’s output/power end panel and set them aside.
Using a 3 ⁄ 32-inch Allen wrench, remove only the screws on the amplifier’s (top) clear cover and set them aside.
Remove the end panel and slide the cover off. Set both parts aside.
Locate the enclosed hardware bag and remove the four clips. Each clip has a square end and a larger round end. Using a round end, press two clips onto each neon tube (e.g., Street Glow AN9 or equivalent).
For each tube, align both clips so the square ends slide onto an exposed extrusion edge. Do not cover any screw holes. When installed correctly, each neon tube will sit under an extrusion and not be visible when viewed from directly above.
Route each neon tube’s power cable through its respective NEON hole on the end panel.
Slide the cover back into place and re-install its screws. Then, replace the end panel and reinstall its screws.
Finish the installation of the neon tubes as instructed in their owner’s manual.