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I was very skeptical of this website, I have never downloaded manuals before. I put it on the AMEX and payed through Paypal to ensure protection. I got the manual exactly as described and now I can replace the filter capacitor for this amp. Great Price, others selling for 12.99 or more and this is the same manual. I will search out this website for other manuals. Thank you
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Manual was reasonably easy to follow. I am not an engineer or know much about electronics but with the manuals help I was able to figure out the problem, identify the part required for the repair. Replacement part cost around $30. Whilst replacing the part I was telling myself, "this aint gonna work cos it seems far too easy". Took about 15 minutes to do and my plasma TV works a treat. Would never have been able to do this without the service manual.
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It is OK, this manual help me to repair my dynacord
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Good manual. Even it is an old printed manual, it is well scanned and complete, with all drawings, schematics and parts list. Very good return for the cost.
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I'm very satisfied with my purchase. It resolved my problem. Owner-manuals.com is a very very good place.
Thank you!
GA-200 SERVICE NOTES
Figure 24 (lower part of diagram) shows the parabolic voltage at line frequency on terminals of C617 (do not confuse with E/W modulation which operates at 100Hz) which, as can be seen in figure 25, is modulated at vertical frequency, due to the modulation brought about by the E/W. The parabolic form of the signal (31 KHz) allows for controlling the gate of transistor Q612, so that when the signal reaches the highest point, it saturates Q609, which cuts out Q612. Control of the gate is achieved by means of Q609 and the
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divider formed by R631 and R630. Figure 25 shows the same signals in vertical frequency, where the attack on the gate of Q612 can be observed.
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Figure 24
Figure 25
In this circuit, a safeguard (Q614) has been incorporated to protect against overvoltage peaks in the Source of Q612 when turning the television set on.
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