| hfe_pioneer_protection_circuits_troubleshoot.pdf | | TECI|NICAL OUIDE TOR SERI|ICE
TROUBLE SHOOTING
PROTECTION CIRCUITS
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SERVICE DEPARTMENT INTERNATIONAL DIVISION
TROUBLE SHOOTING METHODS
FOR
PROTECTION CIRCUIT
r'I()NEEFI'
SERVICE DEPARTMENT INTERNATIONAL DIVISION
3.
THE MAIN PURPOSE OF HAVING PROTECTION CIRCUITS IN AUDIO
EOUIPMENT IS TO PROTECT THE POWER TRANSISTORS IN THE MAIN
AMPLIFIER. HOWEVER, IN THE CASE OF OUTPUT CAPACITOR LESS
(O.C.L.) MAIN AMPLIFIER CIRCUITS, LOUDSPEAKERS ARE DIRECTLY
COUPLED TO THE AMPLIFIER. FOR THIS REASON WE MUST ALSO
PROTECT THE SPEAKERS.
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OCL }4AIN AMP CIRCT'IT
4.
IN ORDER TO MEET THES |
