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This was an excellent source of detailed assembly information on a device which is at least 12 years old. A very lucky find, coupled with great service.
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Excellent Service Manual and best price on the Internet. This Service Manual covers everything you could ever need including full circuit schematics, component layout diagrams, stripdown procedure and full parts list/breakdown. I needed this to carry out a modification to one of these headunits and this manual covered everything I needed. Fast delivery, processed within a few hours.
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Thought I would never find a copy of the Technics SX-EN2 Service Manual until I found Owner-Manuals.com. Price was very fair and I received the download promptly. While a photocopy, it is quite readable and includes all the pertinent information and diagrams. Thank you Owner-Manuals!
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I really like this manual and it's reliable.I found and bought easly.thank you.
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Thank you very much. the Instruction corresponds to my expectations. Sent it in time. I don't regret that paid money.
Powered Subwoofer
BU1
BU1 TEST PROCEDURE
TEST PROCEDURE
Equipment needed:
n n n n
7. Turn on generator and adjust so that speaker level output
is 1.0V, 50 Hz. Turn VOLUME control full clockwise. be heard and felt from port tube opening.
8. Green LED should light, immediate bass response should
Function/signal generator/sweep generator Integrated Amplifier Multimeter Cables - line level (RCA) and speaker cables
Sweep Function 1. Follow steps 1 - 4 above, using a sweep generator as a
signal source.
General Function UUT = Unit Under Test 1. Connect both right and left line level inputs (RCA) to
2. Sweep generator from 20Hz to 300Hz. Listen to the
cabinet and drivers for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remove driver and test.
signal generator and UUT. Use Y-cable if necessary from mono source. VOLUME control should be full counterclockwise.
2. Turn on generator, adjust to 25mV, 50 Hz. 3. Plug in UUT; red LED should be ON. Turn VOLUME
control full clockwise.
Driver Function 1. Remove driver from cabinet; detach + and - wire clips.
2. Check DC resistance of driver; it should be 3.3 ohms. 3. Connect a pair of speaker cables to driver terminals.
speaker level output is 5.0V. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that
4. LED should turn Green; immediate bass response should
be heard and felt from port tube opening.
5. Turn off generator, turn VOLUME control fully
counterclockwise, disconnect RCA cables.
4. Sweep generator from 20Hz to 1kHz. Listen to driver for
any rubbing, buzzing, or other unusual noises.
6. Connect one pair of speaker cables to either high level
input terminal on UUT. Cables should be connected to an integrated amplifier fed by the signal generator.
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