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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.
Alignment and Adjustment
2-2 Tape Transport System Adjustment
When parts are replaced, perform the required adjustments by referring to procedures for the tape transport system. If there are any changes to the tape path, first run a T-120 tape and make sure excessive tape wrinkle does not occur at the tape guides. 1) If tape wrinkle is observed at the guide roller S, T, turn the guide roller S, T until wrinkle disappears. 2) If the tape wrinkle is still observed at the tape guide, perform the tilt adjustment of the ACE head. (See page 5-3 of the Service Manual for Test Point Locations.)
2-2-1(b) ACE HEAD TILT ADJUSTMENT
1) Playback a blank tape and observe the position of the tape at the lower flange of tape guide. 2) Confirm that there is no curl or wrinkle at the lower flange of tape guide as shown in Fig. 2-5 (B). 3) If a curl or wrinkle of the tape occurs, slightly turn the screw (A) tilt adjust on the ACE head ass�y. 4) Reconfirm the ACE head height.
(A) (B)
2-2-1 ACE Head Assembly Adjustment
2-2-1(a) ACE HEAD HEIGHT ADJUSTMENT
1) Run the alignment tape (Color bar) in the playback mode. 2) Observe surface of the audio head using a dental mirror. 3) Turn screw (C) clockwise or counterclockwise until the gap of lower tape edge and the lower edge of the control head is about 0.25mm. (Refer to Fig. 2-3 and 2-4)
WRINKLE
(BAD)
(GOOD)
Fig. 2-5 Tape Guide Check
2-2-1(c) AUDIO AZIMUTH ADJUSTMENT
1) Load alignment tape (Mono scope) and playback the NTSC : 7KHz (PAL : 6KHz) signal. 2) Connect channel-1 scope probe to audio output test point. 3) Adjust screw (B) to achieve maximum audio level. (See Fig. 2-3)
SCREW (A) TLIT ADJUST
SCREW (C) HEIGHT ADJUST
X-POSITION ADJUSTING SLIT SCREW (B) AZIMUTH ADJUST
SCREW (D) X-POSITION LOCKING
2-2-1(d) ACE HEAD POSITION (X-POINT) ADJUSTMENT
1) See page 5-1 of the Service Manual for ACE Head position (X-Point) adjustment.
Fig. 2-3 Location of ACE Head Adjustment Screw
AUDIO HEAD VIDEO HEAD
0 ~ 0 .25 mm CONTROL HEAD
Fig. 2-4 ACE Head Height Adjustment
2-2
Samsung Electronics
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