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I would not plug this machine in without finding a manual like this. In addition to setup and normal operating instructions, it has troubleshooting flowcharts, diagrammed mechanical adjustments, and schematics to beat the band. The tech I hand it to would be thrilled to find solder side PCB diagrams with component outlines superimposed, pinouts for every IC chip, and line drawings of transistors, with labeled legs.
As for printing quality, this may be a copy of a copy, but even the finest print when enlarged is very legible. There is a bit of grayed print over a few pages, as if a wet page were placed over it, but the print is still very legible. If you could borrow an original manual and get it printed and bound for 4 to 6 times the cost, you could get better quality. In that case you wouldn't be here. For price, utility, and availability I am rating this manual highly.
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I received the Manual in a timely manner and it was exactly what I needed.
This is a perfect copy of the Service Manual, The quality is great. I am very
happy. Thank you
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exactly as they say. Within 24 hours the link to the pages and offcourse it was the right service manual. Super and thanks
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The manual was exact the thing that was promised. My old car stereo is working again thanks to the information supplied.
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I PURHASED THIS PRODUCT BECAUSE I WAS HAVING PROBLEMS WITH MY CDR20 HARMAN KARDON RECORDER. WHICH I PURCHASED NEW 12 YEARS AGO. AFTER REVIEWING THE MANUAL, I WAS ABLE TO ADJUST THE TENSIONER IN THE SYSTEM. WORKS LIKE A CHAMP!.
SAVED ME AT LEAST 100.00 WHICH WAS WHAT A SERVICE REPAIR STATION WANTED. GREAT MANUAL EASY TO READ. SPECIALLY AFTER I PRINTED THE PAGES WHICH DEALT WITH MY RECORDER. THANKS A LOT!!!!!!!!
JBL 300 SAT JBL Loudspeaker Troubleshooting/Repair Tips Most Customers prefer to do simple loudspeaker repairs themselves. By following the steps below, most loudspeakers can be returned to their original factory performance with minimum effort. Choose the scenario that best describes the problem you are experiencing. Problem 1: No sound/distorted sound from one loudspeaker in a pair (or set) Connect the dead/distorting loudspeaker to a different amplifier channel (one that had a functioning loudspeaker connected to it). If it functions normally, the problem is not loudspeaker related. If the loudspeaker still makes no sound or sounds distorted: a wire may have become loose or disconnected, the network (also known as a crossover) may be defective, the drivers (woofer, tweeter, etc) may be defective, or in very rare cases, all may be defective. Refer to the wiring diagram and exploded view below. The network is a small circuit board found on the inside of the terminal cup, or mounted to an inside wall of the enclosure. It sends low frequency sounds to the woofer, high frequency sounds to the tweeter and (if applicable) mid frequency sounds to the midrange driver. Make sure all wires are secure and connected. Look for components on the network that look burnt, �bulged�, or abnormal. If these conditions are normal, connect the network to the drivers from another matching loudspeaker. MAKE SURE you attach the correct wires to each driver - mid and low frequency sounds can damage the tweeter! If there is still no sound or distorted sound, the network is defective. If there is clean undistorted sound, the drivers are defective. Problem 2: No sound or distorted sound from one or more (but not all) drivers in an enclosure Remove the offending driver(s) from the enclosure and make sure all wires are secure and connected. If they were, proceed with the following test: Woofer or midrange driver: Connect the driver�s + and - input terminals directly to the loudspeaker wires from your receiver/amplifier and play some music at a reasonable volume. If the driver now sounds normal (produces a clean undistorted sound), the network is most likely defective. Tweeter: Replace the tweeter with a functioning tweeter from another loudspeaker. If the tweeter now functions normally (produces clean undistorted sound), the original tweeter was defective. If the replacement tweeter also sounds distorted or produces no sound, the network is most likely defective. Problem 3: Loudspeakers distort, rattle or pop at higher volumes. This is usually NOT a loudspeaker problem. Common causes are too much power (playing the loudspeakers too loud and causing them to distort), an amplifier with not enough power (the amplifier can�t produce the required volume without distorting), excessive equalization (turning the tone controls too far clockwise, and/or engaging the loudness/bass boost button on your receiver) or some combination of the above. If only one loudspeaker is exhibiting the problem, and you�re confident that it�s not caused by too little power/too much power/excessive equalization, see solutions for Problems 1 or 2.
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