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About the service it's very fast and reliable. About the manual the quality is high enough to read even the tiniest details on the wiring diagrams so you can't ask much more than that, let it alone for a manual of a product from 20 years ago. Thank you, very satisfied.
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The downloaded quality was as good as the orignial
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This is a great and complete Service Manual for the Sharp GF8585HB. Giving full and detailed technical insight. Good to find these manuals online.
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Everything was ok with the manual. If I have a small complaint, is that I ordered it during the weekend and I think you guys were closed. But I did receive it late Sunday. I will surely order from you again
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Best Service! Very fast and easy to handle. Fast Download an you can come back every day to download again
Service Bulletin
Service Bulletin JBL2000-04 - November 2000 To: All JBL Service Centers Warranty labor rate: MINOR Models: BP300.1, BP600.1, BP1200.1 Subject: Muting during intense bass passages The JBL BP series amplifier is designed with the following protection circuits:
Thermal (excess heat) DC voltage on the output terminals (overdriving or �clipping�) Short Circuit (excessive current)
Under certain large signal conditions during intense bass passages, the unit will go into protection. These amplifiers are behaving as designed. As the unit is driven into hard clipping, the protection circuit found in BP Series amps was engineered to protect your loudspeakers from being destroyed by a severely clipped output signal. This can be remedied easily by turning the volume down somewhat on your music source. In the event you receive a BP series amplifier with the complaint: �Under a large signal input, with music that is composed of high-level bass, the amplifier mutes for 2-3 seconds, and then returns to normal operation�, the following modification will effectively increase the amount of clipping that is allowed to occur before the protection circuit engages by increasing the threshold at which the amplifier mutes - for the benefit of customers who use the amps in SPL competition, or for customers who insist on driving the amplifiers into this potentially hazardous zone. 1) 2) 3) 4) Turn the amplifier upside-down and remove the Phillips screws holding the bottom cover on. Locate and change R510 from 47K to 4.7K ohms 1/5W (JBL part# RE212047200). Locate and change R511 from 22K to 2.2K ohms 1/4W (JBL part# QAF0450-222). If it is not already present, add new part - 4.7uf 50v electrolytic capacitor (JLB part# EC070114760) in parallel with R511. Polarity: The negative side of the capacitor must be connected to the junction of R510/R511, which can be discovered with an ohmmeter. NOTE: Using the correct soldering techniques, you should be able to make these changes from the top of the PCB without its removal. 5) Replace bottom cover; test amplifier
Model
BP300.1 BP600.1 BP1200.1
Serial number
All Serial numbers affected
Status
Modify if Needed
Action
Change R510 from 47K to 4.7K ohms Change R511 from 22K to 2.2K ohms Add 4.7uf 50v electrolytic cap in parallel with R511
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