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Adcom GFP-555 Schematic

post #1 of 5
Thread Starter 
I need help from anyone with a schematic diagram of Adcom GFP-555 and report me the value of the zener diode D903 on the circuit board. Would appreciate any help could bring about.

Best regards,
Pedro Suarez
post #2 of 5
Check GFA-555 parts upgrade/substitutions? - diyAudio

Several threads there on the GFA555
post #3 of 5
Thread Starter 
Greetings, I tried without luck so far.
post #4 of 5
Did you try emailing Adcom? They have emailed service manuals to me before (for free).
post #5 of 5
Thread Starter 
I asked for the diagram and they told me they sold it for $19.95
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