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very fast detailed and accurate hope to do business again
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This was precisely what I was looking for. Complete and good quality!
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This is the ONLY copy of this manual I could find for a realistic price. Even Panasonic could not provide me with one.
The PDF is a very good copy and it helped me diagnose and find the fault with the unit I have.
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Very complete and well reading drawings. Documentation is essential for successful repairs.Good documentation, with all that is necessary. This manual was what I was waiting with all the information necessary for the repairing I need it for. You must buy it if you want to do repairs or simply understand how it works.
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Excellent service manual includes everything is need to repair this radio-caseete, how to disassemble, wiring diagram, all , waiting time until the download was only a few hours. I'm going to buy service manuals from here, are cheap and very good.Thank you.
Overture 3 Test Set Up and Procedure
SIGNAL GENERATOR AC VOLT METER (10V) OVERTURE 3 UNDER TEST
AMPLIFIER
SYSTEM AURAL SWEEP TEST
Equipment needed: � Function/signal generator/sweep generator � High Gain Integrated Amplifier � Multimeter � Speaker cables General Unit Function (UUT = Unit Under Test) 1. From the signal generator, connect a mono cable to the Integrated amplifier; with speaker cables connect the amplifier�s output to the UUT Speaker binding posts. 2. On the UUT, turn the BASS (level) control full counterclockwise (1). 3. Turn on generator, adjust so that the output at the Integrated amplifier is 2.0V, 40 Hz. 4. Plug in UUT; LED should be Red. Turn BASS (level) control full clockwise (9). 5. LED should now be Green and immediate bass response should be heard (and observed if the grille is removed). Sweep Function 6. Follow steps 1-5 above. 7. 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 woofers and test. Driver Function 8. Remove woofer from cabinet; detach + and - wire clips. 9. Check DC resistance of woofer; it should be: (120v) - 14.2 Ohms ±10% (230v) - 40.0 Ohms ±10% 10. Connect a pair of speaker cables to driver terminals. Cables should be connected to a high-gain integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 20.0V. * 11. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises. *
Only the 120v version will be driven to near maximum excursion at this voltage; because of the unusually high DCR of the voice coil, driving the 230v version at twice this voltage is not practical with simple test equipment and 20v should suffice for test purposes.
Amplifier bias adjustment 1) Power up loudspeaker and drive at low levels for 3 minutes for warm-up. 2) Remove amplifier assembly (disassembly procedure in bulletin INF9704 Page 15). 3) Power up on the bench; attach DMM (on low DC voltage range) across TP1 and TP2 on schematic � R77 - (120v) .22 � 5W fuse resistor. (230v) .47 � 5W fuse resistor. Mini-grabbers can be used on the resistor leads without PCB removal. 4) Adjust POT2 (bias pot on PCB) to read 5.9 mV for both 120v and 230v units.
18
00421
SPEAKER OUTPUT FROM AMPLIFIER
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