Lanzar Scematic

Lanzar 2050, 2100, 4100 Schematic recovery project

The provided schematics are poor photocopies of much larger documents and only give you the general idea. To properly utilize these devices will require more information than they can give us.

This is a 1st pass at redrawing the scematic for the Lanzars. It looks like the 2050 & 2100 share the same 'preamp' stage. The 'output' stage on the 2100 has 4 more transistors and (at least a few) different component values. I haven't got a 4100 scematic.

The 'preamp' part of the board -- lo pass, volume & bass-boost sections. I have labeled some of the components. Some of those may even be right.

Can also be made available in many other formats by request (pdf, eps, dwg, dxf, minicad...)

Preamp Stage: Clicking on the thumnail of the schematic will get you are much larger gif (19k -- should print at 150 dpi on a legal page).

2100 Output Stage: Clicking on the thumnail of the schematic will get you are much larger gif (17k -- should print at 150 dpi on half a letter page).

2050 Output Stage: Clicking on the thumnail of the schematic will get you are much larger gif (15k -- should print at 150 dpi on half a letter page).

2100 Power Supply: Patience Grasshopper 2050 Power Supply: Patience Grasshopper

How you can help

I need interested BASSList to download the schematic and help flesh out this document:

All components need to be correctly labeled. People who can convert the resistor colors into numbers in their heads and people who can see close-up well enuff to read off the cap values/semiconductor labels (and make sense of them in the case of the semiconductors) or would all be useful here. Some of the components obsure their label, these will need to be puzzled out.
Check for topology differences between supplied schematic & a real amp if any
Descriptions of the Lo Pass and Bass-Boost circuitry. Suggestions on how these many be modified (or bypassed). Things such as changing the cross-over point or slope. Changing the lo-pass into a hi-pass.Changing the lo-pass into a subsonic. Can the Bass-Boost act as a Bass-Cut. Can this circuit be rejigged to do something else? Will require those that actually know how these things work.
Other tweaks. For example: better ICs, seperate levels on each channel, better components in critical areas
Details of an AC (home) power supply.
Node voltages from a working amp in order to repair the defective ones, voltages at idle

I'll do the actual drawing. You can mail me text descriptions, annotated gifs, or FAX me ones you have scribbled on (email for FAX#)

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Lanzar 2050, 2100, 4100 Schematic recovery project
The provided schematics are poor photocopies of much larger documents and only give you the general idea. To properly utilize these devices will require more information than they can give us.
This is a 1st pass at redrawing the scematic for the Lanzars. It looks like the 2050 & 2100 share the same 'preamp' stage. The 'output' stage on the 2100 has 4 more transistors and (at least a few) different component values. I haven't got a 4100 scematic. The 'preamp' part of the board -- lo pass, volume & bass-boost sections. I have labeled some of the components. Some of those may even be right. Can also be made available in many other formats by request (pdf, eps, dwg, dxf, minicad...)	Preamp Stage: Clicking on the thumnail of the schematic will get you are much larger gif (19k -- should print at 150 dpi on a legal page).
2100 Output Stage: Clicking on the thumnail of the schematic will get you are much larger gif (17k -- should print at 150 dpi on half a letter page).	2050 Output Stage: Clicking on the thumnail of the schematic will get you are much larger gif (15k -- should print at 150 dpi on half a letter page).
2100 Power Supply: Patience Grasshopper	2050 Power Supply: Patience Grasshopper
How you can help I need interested BASSList to download the schematic and help flesh out this document: All components need to be correctly labeled. People who can convert the resistor colors into numbers in their heads and people who can see close-up well enuff to read off the cap values/semiconductor labels (and make sense of them in the case of the semiconductors) or would all be useful here. Some of the components obsure their label, these will need to be puzzled out. Check for topology differences between supplied schematic & a real amp if any Descriptions of the Lo Pass and Bass-Boost circuitry. Suggestions on how these many be modified (or bypassed). Things such as changing the cross-over point or slope. Changing the lo-pass into a hi-pass.Changing the lo-pass into a subsonic. Can the Bass-Boost act as a Bass-Cut. Can this circuit be rejigged to do something else? Will require those that actually know how these things work. Other tweaks. For example: better ICs, seperate levels on each channel, better components in critical areas Details of an AC (home) power supply. Node voltages from a working amp in order to repair the defective ones, voltages at idle I'll do the actual drawing. You can mail me text descriptions, annotated gifs, or FAX me ones you have scribbled on (email for FAX#)
[ The Transmission Line Speaker Page \| Home \| Schematic \| Pictures \| Examples \| Bridging]