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Great tape deck manual!
I'm very positively surprised, because it is a very long manual, lot of pages, drawings, diagrams, description of how to make the alignment and adjustment procedures.
It is as good as the old "Naka" manuals from the 1970's - if somebody have seen them, they know what I mean by that.
I recommend to buy this very much !
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I am a vintage hifi collector. No way to fix that device without the appropriate service manual...thanks to your site I got it and every thing is easier now. I got the manual right after ordering: fast cheap accurate ... thank you
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Wonderful job clear. Qick fantastic. These people are really good. If even a problem arise they are wonderful assisting you. These scheme is so net despite this is a very old TV. Thank you for everything!!!!!!!!
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Detailed schematic diagram, manual for professionals
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Good service manual,exploded view,adjusment and test point locations,head alignment,mechanical checks and adjusments,all perfect.
GC150AT/ATA 9. No power on
9.1 No power on (I)
Check output voltage +5V, +15V is right or not.
OK NG
It is not power board problem.
Check power switch is turn on or not.
NG OK
Turn switch on.
Check power cord ( P801), Signal cable (P302),P802, P803, CN102, CN103 is connected right or not. NG OK Connect it right.
Check C805 is about DC 140V-330V or not. NG OK Check F801, D801, P801 and repair them.
Check C807 is over 10V or not. NG OK Check R805, R803, I801 and repair them.
Check pin 6 of I801 have same pulse or not. NG OK Check peripheral components of I801 and repair them.
Check pin 1 of T802 have same pulse or not. NG OK Check Q803, R813, R814, D806 , R812 and repair them.
Check peak voltage of R811 triangle pulse is up to 1 volt or not. NG OK Check D804, R807 and repair them.
Check D809, D810, C816, C821, T802 have same short circuit, or the output +5V, +15V is over load. OK NG Repair them.
Check feedback circuit around I802, I803 and the other components and repair them.
Trouble Shooting
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