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There are currently no product reviews.
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This is exactly the service manual I needed.
Complete with all schematics, partslists, PCB layouts and alignment instructions.
This manual covers both the T-4970 en T-488F Onkyo tuner.
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IF PRINTED CIRQUIT BOARD WIRING VIEW WAS ONE TONE LIGHTER, THEN 5 STAR RANK HAS TO BE MY CHOISE.
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Very usefull, good quality drawings !
Muito útil encontrei todas as informações necessárias.
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Wanting to repair a neighbours tape recorder I needed the necessary information, it makes it easier. Although the service manual is described as "Language : English" To my dismay I found that it is entirely written in German, a language I do not understand. At least I now have the schematics which will help of sorts. I may not use this service again due to the laguage difficulty after all when it states English you do not expect it to be entirely in another language.
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GOOD SERVICE MANUAL.I ALWAYS BUY THERE IF I FIND WHAT I AM LOKING
ELECTRICAL ADJUSTMENTS
(TV SECTION)
2-4: CONSTANT VOLTAGE (AC) 1. Connect the digital voltmeter to TP401. 2. Set condition is AV MODE without signal. 3. Adjust the VR502 until the DC voltage is 101 ± 0.5V. 2-5: CONSTANT VOLTAGE (DC) 1. Connect the digital voltmeter to TP401 . 2. Set condition is AV MODE without signal. 3. Adjust the VR501 until the DC voltage is 100 ± 0.5V. 2-6: CUT OFF 1. Place the set with Aging Test for more than 15 minutes. 2. Set condition is AV MODE without signal. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (5) on the remote control to select "OTHERS". The Fig. 2-2 appears on the display. 5. Press the channel button (5) on the remote control to select "CUT OFF". 6. Adjust the Screen Volume until a dim raster is obtained. 2-7: FOCUS 1. Receive a broadcast. 2. Turn the Focus Volume fully counterclockwise once. 3. Adjust the Focus Volume 2-8: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustment. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the white 100% signal from the Pattern Generator. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (2) on the remote control to select "AKB". The Fig. 2-3 appears on the display. 5. Press the channel button (2) on the remote control to select the "R. BIAS". 6. Using the PLAY or STOP button on the remote control, adjust the R. BIAS. 7. Press the CH. UP/DOWN button on the remote control to select the "G. BIAS", "B. BIAS", "R. DRIVE", "G. DRIVE" or "B. DRIVE". 8. Using the PLAY or STOP button on the remote control, adjust the G. BIAS, B. BIAS, R. DRIVE, G. DRIVE or B. DRIVE. 9. Perform the above adjustments 7 and 8 until the white color is looked like a white. until picture is distinct. 2-10: VERTICAL SIZE NOTE: Adjust after performing adjustments in section 2-8. 1. Receive the cross hatch signal from the Pattern Generator. 2. Using the remote control, set the brightness and 3. contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-4 appears on the display. Press the channel button (3) on the remote control to select "V. SIZE 50/60". Press the PLAY or STOP button on the remote control until the rectangle on the center of the screen becomes square. Receive a broadcast and check if the picture is normal. Receive the cross hatch signal of NTSC. (Audio Video Input) Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. Fig. 2-4 2-9: HORIZONTAL PHASE 1. Receive the center cross signal from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-2 appears on the display. 4. Press the channel button (1) on the remote control to select "H. PHASE". 5. Press the PLAY or STOP button on the remote control until the vertical line becomes fit to the notch of the shadow mask. 1. H. PHASE 2. H. BLK 3. V. SIZE 50/60 4. V. POSI 50/60 5. V. LIN 50/60 6. V. SC 50/60 7. V. COMP 8. (H FREQ)
0. RETURN
4. 5.
6. 7. 8.
1. AKB AUTO 2. R. BIAS 3. G. BIAS 4. B. BIAS 5. R. DRIVE 6. G. DRIVE 7. B. DRIVE 8. AGC AUTO
0. RETURN Fig. 2-3 D2-2
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