REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

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 !

Monday, 1 April 2019

JBL GT BASSPRO II SUB-WOOFER - WIRING DIAGRAM - CIRCUIT DIAGRAM (CAR AUDIO) [LM3700 IC]

JBL GT BASSPRO II Sub-Woofer - WIRING DIAGRAM - CIRCUIT DIAGRAM (Car Audio) [LM3700 IC]

JBL BASSPRO II_SCHEMATIC & WIRING DIAGRAM - Used IC-LM3700 _ Exploded View
 
SPECIFICATIONS
Amplifier power: 100 Watts
Frequency response: 20Hz – 120Hz
Fuse rating: 20A
Max current draw: 12A
Idle current draw: <800mA
Input sensitivity: 50mV to 4V Line-level input; 1V to 16V universal interface
Crossover frequency: 70Hz – 120Hz
Crossover slope: 12dB
Dimensions (L x W x H): 16-1/8" x 9-1/2" x 12-1/4" (includes mounting feet) (410mm x 242mmx 312mm)
WIRING DIAGRAM
  When using the high-level input connections, BassProII will automatically turn on when you turn on your radio.  In this case, the remote (REM) connection is not needed. Use at least #20 AWG speaker wire for speaker-level input connections.
  Use at least #12 AWG wire for the Positive Battery (BATT +12) and Ground ( ) connections. If needed, use at least #20 AWG wire for the remote (REM) turn-on connection.  Connect BassPro II’s “BATT +12V” terminal directly to the battery’s positive (+) terminal. Install a fuse holder, with a 20A fuse, within 18" of the battery’s positive (+) terminal.  Route all power wires through a grommet in the vehicle’s firewall. If a factory grommet is not available, install one.  Connect a short ground wire from
  Bass Pro II’s ground terminal GND to the nearest bare metal surface. For a good connection, use sandpaper to clear paint from the metal surface and use a screw with a lock (star) washer.  The remote (REM) connection requires a +5 to +12 Vdc signal for Bass Pro II to turn on when using the line-level connections. Most head units with preamp outputs provide this remote voltage signal. As an alternative, connect this terminal to a switched ignition circuit.
SCHEMATICS
EXPLODED
PWB
CLICK ON THE PICTURES TO MAGNIFY
Posted By: FRANK at 01:31
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