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There are currently no product reviews.
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El producto satisface las necesidades del servicio t
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This is a good quality scan of the Operation & Maintenance (Service) Manual for the PAL version of this high-band broadcast umatic, BVU-800P
All schematics and lineup procedures appear to be included in this one manual AFAICT.
The file size is just over 113 MB which gives an idea of the quality and number of pages.
All of the schematics, which contain some fairly small print, are easily readable when you zoom into the page.
John Thompson, Newcastle Upon Tyne, England.
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Good quality, all schematics of few of models. There is also short form of user manual and regulation manual.
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Perfect copy of the service manual. you can enlarge every page, and it comes up
with all details.
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It´s very very nice manual with all, what i need. Original in good quality. Very fast business. Very much thanks...
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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