Panasonic KX-MB283BR Service Manual page 117

11.2.12. OPERATION PANEL SECTION
Refer to TEST FUNCTIONS (P.73).
1. NO KEY OPERATION
2. NO LCD INDICATION
CROSS REFERENCE:
TEST FUNCTIONS (P.73)
11.2.13. SENSOR SECTION
Refer to SENSORS AND SWITCHES for the circuit description.
Perform an SENSOR CHECK to determine if the sensor is operating correctly.
1. Check the pickup sensor .......... "FAILED PICKUP"
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KX-MB283BR