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This is a great and complete Service Manual for the Sharp GF8585HB. Giving full and detailed technical insight. Good to find these manuals online.
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Everything was ok with the manual. If I have a small complaint, is that I ordered it during the weekend and I think you guys were closed. But I did receive it late Sunday. I will surely order from you again
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Best Service! Very fast and easy to handle. Fast Download an you can come back every day to download again
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Very good quality, no parts are missing and everthing is readable.
Thank you very much. :-)
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This manual is all I need to check and repair my equipment. Thank you....
Power Amplifier
Reference 7520a/7521a
TROUBLESHOOTING
� PROBLEM: No audio (POWER LED is off). CAUSE and SOLUTION: No voltage at BATT+ and/or REM terminals, or bad or no ground connection. Check voltages at amplifier terminals with VOM. � PROBLEM: No audio (PROTECT LED flashes every 4 seconds). CAUSE and SOLUTION: DC voltage on amplifier output. Amplifier may need service; see enclosed warranty card for service information. � PROBLEM: No audio (PROTECT LED is on). CAUSE and SOLUTION: Amplifier is overheated. Make sure amplifier cooling is not blocked at mounting location; verify that speaker-system impedance is within specified limits. � PROBLEM: No audio (PROTECT and POWER LEDs flash). CAUSE and SOLUTION: Voltage less than 9V on BATT+ connection. Check vehicle charging system. � PROBLEM: No audio (PROTECT LED is on). CAUSE and SOLUTION: Voltage greater than 16V or less than 8.5V on BATT+ connection. Check vehicle charging system. � PROBLEM: Distorted audio. CAUSE and SOLUTION: Input sensitivity is not set properly, or amplifier or source unit is defective. Check INPUT LEVEL setting, or check speaker wires for shorts or grounds. � PROBLEM: Distorted audio (PROTECT LED flashes). CAUSE and SOLUTION: Short circuit in speaker or wire. Remove speaker leads one at a time to locate shorted speaker or wire, then repair. � PROBLEM: Music lacks �punch. � CAUSE and SOLUTION: Speakers are not connected properly. Check speaker connections for proper polarity.
STATUS LEDs Clip: Indicates the amplifier is being overdriven, and your speakers may be in danger. This should blink only on musical peaks, and not be on constantly. Power: Indicates the amplifier is on. Protection: Refer to �Troubleshooting� for specific indications. Figure 15. LED status.
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