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Awesome manual. Complete diagrams of all board assemblies as well as how to get to each part of the t.v. down to the individual screws and their locations. Get it.
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perfect copy, im very satisfied, i was need the diagram over the powersupply and
the copy was very sharp
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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.
DECK C.B
CON1 SFR1
1
DECK R/P/E HEAD
2
REV
< DECK SECTION >
2
FWD PRACTICAL SERVICE FIGURE
< TUNER SECTION >
< FM SECTION >
IHF Sensitivity: (THD 3%) Signal to noise ratio: (Input 54dB) Distortion: (Input 54dB) Auto stop level: Stereo separation: Intermediate frequency: 15dB±5dB (at 90.0MHz) 14dB±5dB (at 98.0/106.0MHz) More than 60dB (at 98.0MHz) Less than 1.2% (at 98.0MHz) 25±10dB (at 98.0MHz) More than 20dB (at 98.0MHz) 10.75MHz
1. Tape Speed Adjustment Settings: � Test tape: TTA-100 � Test point: SP-OUT 2V � Adjustment location: SFR1 Method: Play back the test tape and adjust SFR1 for 3000Hz±5Hz (FWD) and FWD PLAY speed±45Hz (REV). 2. Head Azimuth Adjustment Settings: � Test tape: TTA-300 � Test point: SP-OUT 2V � Adjustment location: Head azimuth adjustment screw Method: Play back the 8kHz signal of the test tape and adjust screw so that the output becomes maximum. Next, Perform on each FWD PLAY and REV PLAY mode. 3. PB Frequency Response Check Settings: � Test tape: TTA-320 � Test point: SP-OUT 2V Method: Play back the 315Hz and 10kHz signals of the test tape and check that the 10kHz signal with respect to that of the 315Hz signal is 0dB±3dB. 4. REC/PB Frequency Response Check Settings: � Test tape: TTA-602 � Test point: SP-OUT 2V Method: Input a-20VU signal to the AUX terminal. Record the 1kHz and 10kHz signals on the test tape and play back them. Check that the difference between the record level and the play back level at 1kHz and 10kHz signal is 0dB to ±3dB.
< AM (MW) SECTION >
Sensitivity: (S/N 10dB) Signal to noise ratio: (Input 74dB) Distortion: (Input 74dB) Auto stop level: Intermediate frequency: 46±5dB (at 600kHz) 44±5dB (at 1000kHz) 42±5dB (at 1400kHz) More than 33dB (at 999kHz) Less than 3.0% (at 999kHz) 50+10/-15dB (at 1000kHz) 450kHz
< DECK SECTION >
Tape speed: Wow & flutter: Pinch roller pressure: Take-up torque: FF & REW torque: Back tension: Distortion: Noise level: 3000Hz±45% Less than 0.14% (W.R.M.S) 270-330g 30-55g-cm (FWD, REV) 75-180g-cm 2-7g-cm (FWD, REV) Less than 3.0% (REC/PB, 0VU) Less than 80mV (PB, REC/PB, FILTER DIN AUDIO) More than 55dB (at 125Hz, +10VU) TTA-100 TTA-602 (NORMAL)
Erasing ratio: Test tape:
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