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VERY GOOD SERVICE.FAST ANS VERY HONEST PRICE .RHAANK HERNAN
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Thanks to this service manual I repaired my old camcorder! The manual perfectly explains how to disassemble the camcorder step by step.
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This manual is very useful because it presents the technical specifications of the cd player, including the manufacturer of the reader, this helps if you need to replace it. It also displays the settings and layout of the circuit.
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Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
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Great quality copy, right what I was looking for, all I need to fix my radio.
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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