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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.
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2. Receiver (Wireless SP) side
(1) In a case where the power is not turned on (the POWER LED does not light)
A
No power (The POWER LED does not light.)
Insert the FFC correctly.
No
Is the FFC (*1) correctly inserted?
(*1) : FFC between CN5901 (RX Assy) and CN5902 (LED Assy)
Yes
B
Is the POWER LED lit?
No
Yes
Is the fuse FU1 blown?
No
Is the IC11 and/or IC14 in MAIN Assy broken? Yes Replace IC11 and/or IC14.
No
Check that the circuits are not short-circuited. As the circuit for +9 V is most likely to have been shortcircuited, check the circuits around IC15.
Yes Replace the FU1 fuse.
C
Yes
Yes
Is the POWER LED lit?
No
Is the POWER LED lit?
No
Yes Inspection completed.
Yes
(2) In a case where no sound is output
D
No sound
Check the Transmitter side.
No
Is TUNED LED lit? Yes
E
Check the "SP PROTECT"circuits around Q3455 and Q3454.
No
Is the relay on?
Yes
Replace IC12 and IC13.
No
Is +B voltage active?
Yes (A)
F
(B)
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