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.
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.
Very usefull, good quality drawings !
Muito útil encontrei todas as informações necessárias.
Text excerpt from page 8 (click to view)
ELECTRICAL ADJUSTMENT
PRACTICAL SERVICE FIGURE
(TUNER SECTION)
<FM SECTION>
Signal noise ratio: Distortion: If frequency: Stereo separation: More than 45dB Less than 3.0% 10.7MHz More than 20dB
(TAPE SECTION)
Tape speed: Wow & flutter: Erasing ratio: Distortion: Signal to noise ratio: 2940-3090Hz Less than 0.45% More than 30dB Less than 3% (PB) Less than 8% (REC/PB) More than 48dB (PB)
<AM SECTION>
Signal noise ratio: (5mV/m) Distortion: If frequency: More than 30dB (at 1000kHz) Less than 3% (at 1000kHz) 455kHz