Denon DCD-F109 Service Manual page 26

Compact disc player
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2.8. Accumulated laser on time display
(1) When the DISC/USB and 5 button is pressed while the this unit is in the stop mode (CD TEST MODE display), the
accumulated laser on time is displayed.
(2) The laser drive times are added and the result is displayed.
(3) One count corresponds to 10 minutes. (Values under 10 minutes are discarded.)
(4) Count values are stored in the EEPROM every 10 minutes.
(5) The accumulated laser on time is displayed in hours.
(6) Laser ON/OFF is monitored and counted.
(7) Press the 2 button, CD test mode display reappears.
(8) The count values are not cleared, even when the set is reset .
•No. digits stored in EPROM: 4, 0xFFFF
•No. digits displayed: 5
•When the time exceeds 10922 hours, the stored data is not updated and the value is fixed to 0xFFFF. (The display
is fixed to 10922 hours.)
• 13 flashing
XXXXX hour
LASER ON TIME
q Count value is reset
(1) When the 1 / 3 button is pressed for over 5 seconds while the accumulated laser on time is displayed, the count
value is reset.
(2) After resetting is completed, the display in 2.6 (00000 hours on the top line) reappears.
(3) Count value is reset upon shipment from the factory and when the mechanism is replaced.
CLEAR
LASER ON TIME
26

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