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There are currently no product reviews.
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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.
Pin No. 36 37 38 39, 40 41 42
Pin Name TES HFL SLOF CV�, CV+ RFSM RFS�
I/O O O I I O I
Description Pin from which TES signal is output to DSP. �High Frequency Level� is used to judge whether the main beam position is on top of bit or on top of mirror. Sled servo off control input pin. CLV error signal input pin from DSP. RF output pin. RF gain setting and EFM signal 3T compensation constant setting pin together with RFSM pin.
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
SLC SLI DGND FSC TBC NC DEF CLK CL DAT CE DRF FSS VCC2 REFI VR LF2 PH1 BH1 LDD LDS VCC1
O I � O I � O I I I I O I � � O I I I O I �
�Slice Level Control� is the output pin which controls the RF signal data slice level by DSP. Input pin which control the data slice level by the DSP. Digital system GND. Output pin to which external focus search smoothing capacitor is connected. �Tracking Balance Control� EF balance variable range setting pin. No connection. Disc defect detector output pin. Reference clock input pin. 4.23 MHz of the DSP is input. Microprocessor command clock input pin. Microprocessor command data input pin. Microprocessor command chip enable input pin. �Detect RF� RF level detector output. �Focus Search Select� focus search mode (± search/+ search) select pin. Servo system and digital system Vcc pin. Pin to which external bypass capacitor for reference voltage is connected. Reference voltage output pin. Disc defect detector time constant setting pin. Pin to which external capacitor for RF signal peak holding is connected. Pin to which external capacitor for RF signal bottom holding is connected. APC circuit output pin. APC circuit input pin. RF system Vcc pin.
44
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