JBL LSR28P, Техническое и сервисное руководство

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TROUBLESHOOTING GUIDE
The purpose of the troubleshooting guide is twofold.
First, this guide will enable the service technician to become familiar with the operating
characteristics of the unit and to accurately diagnose and repair the associated symptoms that
indicate malfunctioning circuitry. Secondarily, this guide will help the technician to decrease the
total repair time needed to correct faulty circuitry by improving his/her troubleshooting skills
and ,thus, increasing the profitability of the service department.
The actual electronic repair process can be separated into two components, which determine
the total repair time—diagnoses of the problem and repair of the problem.. The repair time of the
equipment will vary minutely, but, statistically it will be consistent, therefore, it is already
defined as a specific amount of time. The only other factor that can impact the total repair time is
the diagnoses time. By becoming familiar with the operation of the equipment, its design faults
and attributes, one’s skill at diagnosing the symptoms of faulty circuitry will increase over time.
And, thus, the diagnosis time will decrease.
Since the old adage of “time is money” is very apropos in all societies, so it is with
electronic repair. The technician, therefore, must be time efficient with respect to diagnosing and
repairing 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 in product is eligible for in warranty
status.
•
If product is out of warranty, contact the customer with an estimate of the repair charges.
Note: It is the policy of JBL Professional to always give the customer "the benefit of doubt"
concerning decisions of eligibility of warranty coverage. This not only is a good business
practice in the long run but also promotes customer good faith and satisfaction.
Wait for approval or denial of estimate and note the time and date of customer's decision.
•
If customer approves, repair unit and verify proper operation
•
If customer denies, wrap up set and returns to same.
If at all possible perform a Safety Checkout before returning set to customer regardless if unit is
repaired or not.