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There are currently no product reviews.
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the manual is in good quality and it's in pdf. manual was send in less then 24h.
regards
mike
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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.
2-3. Circuit Descriptions
Switching Power Supply Circuit (PS-241 Board) The +9.5 V constant voltage is generated by supplying the input voltage of 10.5 V dc through 17 V dc to the chopper regulator circuit. The IC301 controls the oscillation pulse width by feedbacking the chopper output voltage at the Q303 to the pin 2 and comparing it with the reference input voltage at the pin 1. This comparison output drives the Q303 after going through the Q301 and Q302. The output is then rectified by the following rectifiers to generate the dc voltage of +9.5 V dc. D302, L302, C307, and L303 C308, L304, C316, and C309 Tally Lamp Circuit (PS-241 Board) The Q308 and IC302 is a supply voltage variable circuit for the tally lamp PL501. The DIMMER control (1RV506) controls the output voltage level. (DC +12 V through 7 V) The luminance of the tally lamp is varied by the controlled output voltage level. The Q305 through Q307 turn the tally lamp PL501 ON and OFF. Setting the TALLY switch S501 to ON, the Q306 is turned off. The output voltage at the Q305 being added to the base of the Q307, the Q307 is turned ON and the tally lamp is lit. The R TALLY CONT signal from the R TALLY IN terminal (pin 4) of the CN501 connector is added to the base of the Q304 via the pin 3 of CN301. When the R TALLY CONT signal is high, the Q304 is turned on and the R TALLY LEDs (D502, D505/LP-59 board) are lit. The G TALLY CONT signal from the G TALLY IN terminal (pin 12) of the CN501 connector is added to the base of the Q309 via the pin 6 of CN301. When the G TALLY CONT signal is high, the Q309 is turned on and the G TALLY LEDs (D501, D504/LP-59 board) are lit.
BVF-55/55CE
2-5 (E)
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