Gemini P-07 Manual Del Operador página 5

SYMPTOM:
UNIT DOES NOT PRODUCE SOUND. POWER LED
DOES NOT LIGHT.
POWER LED LIGHTS, BUT NO SOUND IS
PRODUCED BY AMPLIFIER.
SOUND IS PRESENT BUT VOLUME IS TOO LOW
EVEN THOUGH SOURCE DEVICE IS SET TO A HIGH
LEVEL.
LOUD 60 CYCLE HUM IS HEARD AT ALL TIMES
THROUGH THE SPEAKER SYSTEMS.
SOUND IS DISTORTED.
FUSE BLOWS INTERMITTENTLY.
POWER LED LIGHTS BUT THERE IS NO SOUND
FROM ONE OR BOTH CHANNELS.
CAUSE:
• POWER SWITCH NOT IN ON POSITION.
• POWER CABLE NOT CONNECTED TO AMPLIFIER OR
TO OUTLET.
• AC OUTLET NOT ACTIVE.
• MAIN AMPLIFIER FUSE DEFECTIVE.
• NO INPUT SOURCE SIGNAL.
• INPUT SOURCE NOT CONNECTED.
• INPUT CONNECTING CABLE DEFECTIVE.
• SPEAKER(S) NOT CONNECTED.
• SPEAKER CABLE DEFECTIVE.
• SPEAKER SYSTEM(S) INOPERATIVE.
• AMPLIFIER'S LEVEL CONTROLS ARE SET TO ZERO.
• AMPLIFIER INPUT LEVEL CONTROLS ARE SET TOO
LOW.
• WRONG PIN CONNECTIONS IN CABLES.
• IMPROPER OR DEFECTIVE GROUND CONNECTION AT
INPUTS. IMPROPER OR DEFECTIVE GROUND AT
INPUT SOURCE DEVICE(S).
• IMPROPER OR DEFECTIVE GROUND CONNECTION
ON AC OUTLET.
• GROUND LOOP THROUGH AC LINE CONNECTION/
RACK MOUNTING.
• DISTORTION OCCURRING IN SOURCE DEVICE.
• INPUT LEVEL IS SET TOO HIGH.
• SPEAKER LOAD IMPEDANCE IS TOO LOW.
• TYPE OR RATING OF THE FUSE IS NOT CORRECT.
• SECONDARY DC FUSES ARE BLOWN (ON EITHER
ONE OR BOTH CHANNELS INDICATING FAILED A
FAILED CHANNEL OR CHANNELS.
(5)
SOLUTION:
• MOVE POWER SWITCH TO ON POSITION.
• CONNECT POWER CABLE TO AC SUPPLY.
• CHECK CONDITION OF OUTLET.
• REPLACE AMPLIFIER MAIN POWER FUSE ON REAR PANEL WITH
CORRECT TYPE AND RATING.
• IF THE FUSE BLOWS A SECOND TIME DISCONTINUE USE AND CONTACT
A QUALIFIED SERVICE TECHNICIAN
• CHECK FOR PROPER FUNCTION OF INPUT SOURCE DEVICE.
• CHECK INPUT CABLES AND CONNECTIONS. REPLACE QUESTIONABLE
CABLES WITH KNOWN GOOD CABLES.
• CHECK SPEAKER CABLES AND CONNECTIONS. REPLACE
QUESTIONABLE CABLES WITH KNOWN GOOD CABLES.
• CHECK OPERATING CONDITION AND STATUS OF SPEAKER SYSTEM(S).
• BE SURE THE LEVEL CONTROLS ARE PROPERLY SET.
• ADJUST LEVEL CONTROLS AS PER INSTRUCTIONS.
• USE CORRECT CABLES (AS SHOWN ON BACK OF UNIT).
• CHECK FOR PROPER AC LINE GROUND ON POWER AMP AND ALL INPUT
DEVICES.
• CHECK INPUT CABLES FOR ALL SOURCE DEVICES AND SIGNAL
PROCESSING AS WELL AS INPUT CABLES TO POWER AMPLIFIER. CHECK
POSITION OF GROUND LIFT SWITCH AS PER INSTRUCTIONS FOR LIFTING
THE GROUND.
• NEVER LIFT THE AC LINE GROUND ON THE POWER AMPLIFIER. IF YOU
ARE NOT TOTALLY FAMILIAR WITH GROUND LIFTING OR UNIFICATION
PROCEDURES, DO NOT ATTEMPT THEM WITHOUT FIRST CONSULTING
YOUR DEALER OR A QUALIFIED SOUND TECHNICIAN FOR MORE
INFORMATION ON GROUNDING. IMPROPERLY DONE, SUCH
PROCEDURES CAN POSE A SAFETY AND/OR FIRE HAZARD.
• CHECK CLIP INDICATORS ON INPUT SOURCE DEVICES AND RESET
LEVELS IF NECESSARY TO ELIMINATE DISTORTION.
• ADJUST LEVEL CONTROLS AS PER INSTRUCTIONS.
• CHECK FOR SHORTS ON THE OUTPUTS.
• CHECK YOUR SPEAKER IMPEDANCE (INFO FROM DEALER).
• CHECK THAT THE FUSE TYPE AND RATING IS CORRECT.
• IF ONLY ONE CHANNEL FAILS, THE SECOND MAY STILL OPERATE, BUT
THE UNIT SHOULD BE SERVICED AS SOON AS POSSIBLE. CONTACT THE
GEMINI SERVICE DEPARTMENT OR YOUR AUTHORIZED DEALER TO
SPEAK TO A QUALIFIED SERVICE TECHNICIAN.