Service manual
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CD-C422/C422C/C2800/C2800C
OPERATION MANUAL
SETTING THE CLOCK
(Main unit operation)
1
Press the POWER button to turn the power off.
2
Press the CLOCK button.
3
Within 3 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time
display mode.
"AM 12:00" → The 12-hour display will appear.
(AM 12:00 - PM 11:59)
"AM 0:00" → The 12-hour display will appear.
(AM 0:00 - PM 11:59)
"0:00" → The 24-hour display will appear.
(0:00 - 23:59)
● Note that this can only be set when the unit is first installed
or it has been reset (see page 16).
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
● Press the TUNING/TIME button once to advance the time by
1 hour. Hold it down to advance continuously.
● When the 12-hour display is selected, "AM" will change auto-
matically to "PM".
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the
minutes.
● Press the TUNING/TIME ( or ) button once to advance
the time by 1 minute. Hold it down to change the time in 5
minute intervals.
● The hour setting will not advance even if minutes advance from
"59" to "00".
9
Press the MEMORY/SET button.
● The clock starts operating from "0" seconds. (Seconds are not
displayed.)
Note:
● In the event of a power failure or when the AC power lead is
disconnected, the clock display will go out.
When the AC power supply is restored, the clock display will
flash on and off to indicate the time when the power failure
occurred or when the AC power lead was disconnected.
POWER
CLOCK
MEMORY/
SET
TUNING/
TIME
( )
AM 12:00 AM 0:00 0:00
2
3
4
7
6
5
8
9
If this happens, follow the procedure below to change the clock
time.
To change the clock time:
When the POWER button is set to OFF.
① Press the MEMORY/SET button.
② Perform steps 6 - 9 above.
When the POWER button is set to ON.
① Press the CLOCK button.
② Within 3 seconds, press the MEMORY/SET button.
③ Perform steps 6 - 9 above.
To see the time display:
Press the CLOCK button.
● The time display will appear for about 3 seconds.
To change the time display mode:
① Perform steps 1 - 2 in the section "RESETTING THE MICRO-
COMPUTER", on page is a circuit diagram.
② Perform steps 1 - 9 above.
In this example, the clock is set for the 12-
hour (AM 12:00) system.
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following conditions:
● To erase all of the stored memory contents (clock and timer
settings, and tuner and CD presets).
● If the display is not correct.
● If the operation is not correct.
1
Press the POWER button to turn the power off.
2
While pressing down the VOLUME button and the /
button, hold down the POWER button for at least 1 sec-
ond.
1,2
2
2
Caution:
● The operation explained above will erase all data stored in
memory including clock and timer settings, and tuner and CD
presets.