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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
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I BOUGHT A PAIR OF INFINITY VINTAGE SPEAKERS THAT REQUIRED TO BE REPAIRED AND THE ELECTRONIC TECHNICIAN ASKED ME FOR THE SERVICE MANUAL.
I TRIED TO GET IT AT THE MANUFACTURER'S SITE WITH NO SUCCESS, SO I STARTED TO LOOK FOR IT IN THE WEB FOR A LONG TIME, UNTIL I FOUND THE SERVICE MANUAL IN THIS EXCELLENT SITE "OWNER'S MANUAL.COM".
NOW I HAVE MY SPEAKERS WORKING AND ENJOYING THE MUSIC I LIKE.
THANKS TO "OWNER`S MANUAL.COM" I RECOMMEND THIS SITE TO EVERYONE.
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Very quick response. Very good and accurate print quality of the scanned document.
4. Connect an oscilloscope to the TP304 (IC301 Pin 36) blue * output.
CONTRAST ADJUSTMENT
5. Connect an oscilloscope (CHl) to the TP305 (IC301 pin 34) green output and (CH2) to the TP (IC301 pin 36) blue output. 6. Turn RV309 (SUB CONT B) to adjust the blue gain so that the positive polarity red signal step wave coincides with the positive polarity green signal step wave on the oscilloscope. 7. Disconnect pin 46 from pin 33 of IC301, and pin 45 from GND. The positive polarity signal and the negative polarity signal may not simultaneously coincide due to the variation.(Figures a and b) In this case, adjust these signals to an average value. (Figure c)
Procedure: 1. Short between IC301 pin-46 and pin-33, and between pin-45 and GND. (Short them at the same time.) Picture will show the white- compressed picture. 2. Input the 5- to 16-step black and white wave (stairstep) of the pattern generator (75 Sz and 1 Vp-p) to the A/V IN jack (J301). 3. Connect an oscilloscope (DC range 1 V/ DIV) to the TP305 (IC301 pin 34) green output. 4. Adjust RV307 (BRIGHT control) so that the black level obtains - 3.8V (line K).
A : 3.8 !I O.lVp-p
Figure b
Figure c
Negative
u-W
polarity Positive
polarity VIF ADJUSTMENT
5. Adjust RV301 (contrast) so that the white line obtains the GND potential (line M) (A = 3.8 t O.lVp-p). � 6. Disconnect pin 46 from pin 33 of IC301, and pin 45 from GND.
Note: These adjustments are not performed usually. Never
touch CT201 of adjusting device. While, only when CT201 have been replaced, make the following simple adjustment.
- Simple adjustment -
WHITE
BALANCE
ADJUSTMENT
Note: When performing this adjustment, set the direct
current drift .adjustment so that the direct currents on each channel of the oscilloscope is stabilized, and use the oscilloscope in this condition. Procedure: 1. Short between IC301 pin-46 and pin-33, and between pin-45 and GND. (Short them at the same time.) Picture will show the white - compressed picture. 2. Input the 5- to 16-step black and white step wave (stair -step) of the pattern generator (75 Sz and 1 Vp-p) to the A/V IN jack (J301). 3. Connect an oscilloscope (CHl) to the TP305 (IC301 pin 34) green output and (CHZ) to the TP504 (IC301 pin 32) red output. 4. Turn RV308 (SUB CONT R) to adjust the red gain so that the positive polarity red signal step wave coincides with the positive polarity green signal step wave on the oscilloscope. -7-
Procedure: Input the monochromatic gradation .wave from EXT ANT IN jack (JlOl). Connect an oscilloscope to Q314 emitter. Adjust CT201 so that the synchro signal is maximum (VIF adjustment). Receive the broadcasts of 2 to 13ch, and check if the screen is colored after the synchronism is stopped with each channel.
To / make maximum (VIF adjustment)
synchro chip
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