Panasonic KX-FT21RS - Manual (Page 21)

2.3. TROUBLESHOOTING DETAILS
2.3.1. OUTLINE
Troubleshooting guide provides a logical path of deduction to assist in locating a fault and suggests methods of restoring the unit
to full working condition. Use the reported symptoms of the fault to determine the best troubleshooting method. Even difficult faults
can be tracked to a specific block or area, for example, the "Digital Board" or "Image Sensor".
A variety of fault descriptions from customers often point to the same area and, for this reason, careful analysis of the reported
symptoms is required. After every repair, test all functions to ensure no problems are evident.
2.3.2. STARTING TROUBLESHOOTING
Select the appropriate troubleshooting method according to the symptoms.
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KX-FT21RS