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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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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.
RI-129W RO-129W
4. Hot-Keep This function automatically controls the on-off operation of the indoor fan motor in accordance with the on-off operation of the compressor during the heating operation, thereby preventing the air conditioner from delivering a cold air when the compressor is off. When the room temperature exceeds the thermostat line �H1�, the compressor is turned off, and the indoor fan motor is turned off after rotating at �UL� for 30 seconds. 3 minutes after turning off the compressor, the compressor is turned on for 3 minutes. (below thermostat line H01). While over H01, the compressor is off. At 10 seconds after turning on the compressor, the indoor fan motor is turned on. The next compressor OFF time is for 3, 8 or 15 minutes according to the room temperature (the time increases with a rise of room temperature).
3 min. Compressor ON OFF ON Indoor fan motor UL OFF 30sec. Thermo off 10sec. time 30sec. 10sec. UL 3 min. (Notes) 3 or 8 or 15min. (Notes)
Pipe temperature ( C)
6. Overheating protection system When overloading occurs during the heating operation, this system controls the outdoor fan motor according to the indoor pipe temperature to prevent the overloading of the compressor and restrain the rise in high pressure. When the indoor pipe temperature exceeds U1�C, the outdoor fan motor is turned off, and when the indoor pipe temperature falls U2�C, the outdoor fan motor turns on. If three minutes elapse after turning off the outdoor fan motor, the outdoor fan motor is turned on, when the indoor pipe falls U1�C.
OFF U1 ON U2 U2 U1 OFF ON
Within 3 minutes
Over 3 minutes
Figure Y-9 Table Y-3 Fan speed Line U1 U2 7. Current control This system, in order to prevent overcurrent during heating operation, controls the outdoor fan motor and changes the indoor fan motor speed by detecting total current. When the current exceeds P1, the compressor is automatically stopped. When the current exceeds P2, the outdoor fan motor is automatically turned off, and when the current falls below P4, the outdoor fan motor is turned on. When the current exceeds P3 and the indoor fan speed shifts down because of cold air(5. Preheat air flow), the changes in the indoor fan speed shifts up as follows. OFF UL, UL L And when the current falls bellow P5, the indoor fan speed shift up is canceled.
P1 10.5A P2 P3 9.4A 8.5A 7.4A 6.4A
H 53�C 49�C
M 54�C 50�C
L 54�C 50�C
Notes: Compressor is off when compressor OFF time is 15 minutes.
Figure Y-7 5. Preheat air flow This function is intended to prevent cold air from being discharged when the heating operation starts or when defrosting. When the indoor pipe temperature is below 29�C at the beginning of the heat operation or after defrosting, the indoor fan motor stays. When the indoor pipe temperature gets higher than 29�C, the fan motor is turned on at speed �UL� after compensation of starting. When the indoor pipe temperature exceeds 35�C, the specified fan speed is restored. When the indoor pipe temperature falls below 30�C, the fan speed shifts down to �UL�. And, when the indoor pipe temperature falls below 24�C, the fan motor turns off. Then, over 29�C , it turns on again at speed �UL�.
35 30 29 24 time Indoor fan motor OFF UL Pipe temperature transition
P4 P5
ON UL OFF UL
Time Outdoor Indoor Compressor OFF
Fan motor Fan motor OFF Shift UP
Figure Y-8
11
Figure Y-10
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