Sharp AR-280 Service Manual page 59

AR-405
During that period, each LED is lighted for 12sec.
↓ 2.0sec.
Note
5 - 2 Purpose Operation test/check
Function Used to check the operation of the heater lamp and the control circuit.
(Purpose)
Section Fixing (Fusing)
Item Operation
Operation/ 1. Select the lamp to be checked with the key.
Procedure
2. Press the [EXECUTE] key.
The selected heater lamp repeats ON/OFF in the frequency of 500msec 5 times.
Then the [EXECUTE] key returns to the original display.
When the [EXECUTE] key is pressed during ON/OFF operation of the heater lamp, the heater lamp is turned OFF
and the [EXECUTE] key returns to the original display.
HL1 (LEFT): This lamp is on the left when viewed from the front and it heats the center of the lamp.
HL2 (RIGHT): This lamp is on the right when viewed from the front and it heats both ends of the lamp.
Note
1/21/1999 8 – 14