JBL EON15 G2, Техническое и сервисное руководство

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TROUBLESHOOTING GUIDE
Any successful electronic repair is dependent upon accurately diagnosing the symptoms that indicate
faulty circuitry to the root cause and the subsequent, reliable repair to correct these faults. With this in
mind, the purpose of this troubleshooting guide is to enable the service technician to quickly become
familiar with the operating characteristics of the unit and to accurately diagnose the associated
symptoms that indicate malfunctioning circuitry. In addition, this guide will facilitate the timely repair
of the malfunctioning equipment so that it can be returned to a satisfied owner. Since the total ‘repair
time’ equals the sum of the ‘diagnoses’ time plus the ‘circuitry repair’ time, and the ‘circuitry repair’
time is standard, the only other factor that can impact this total ‘repair time’ is the initial diagnoses
time. Therefore, the successful technician, must be time efficient with respect to diagnosing and
repairing malfunctioning equipment.
Visually inspect product. Many times a customer's problem with a unit can be located just by visually
inspecting the product for gross faults. This visual inspection can also determine if the equipment has
been abused when a claim for warranty service is involved.
Verify the fault that the customer is experiencing. If unable to reproduce the customer's complaint,
notify the customer of your findings and obtain more information about the complaint.
Verify complaint and repair product as necessary if product is eligible for in-warranty status. It is the
practice of JBL Professional to always give the customer "the benefit of doubt" concerning decisions
of eligibility for in-warranty coverage. This not only is a good business practice in the long run but
also promotes customer good faith and satisfaction.
If product status is out of warranty, troubleshoot and contact the customer with an estimate of the
repair charges.
In either case, it is always wise to use the original JBL replacement components that are listed in the
master parts list to insure the maximum performance of JBL equipment. To obtain more ordering
information contact the website at
www.JBLPRO.com .
Wait for the approval or the denial of the repair estimate and note the time and date of customer's
decision.
If customer approves, repair unit and verify final, proper operation.
If customer denies the estimate, reassemble set and return to the customer.
If possible perform Safety Checkout before returning set to customer regardless if unit is repaired.
TROUBLESHOOTING THE EON 15-G2
This troubleshooting guide is meant for the experienced technician intent on restoring proper operation
to the EON 15-G2. Isolation of the defective circuitry can be effectively accomplished by utilizing this
guide and the circuit descriptions found on the previous pages. Troubleshooting electronic circuitry
entails a cause and effect analysis and the individual faults are separated into generalized categories.
Current, voltage and signal irregularities will constitute the bulk of the necessary repairs to the EON
15-G2.