I have a T621 clock radio. I am unabler to set the time.

To correct the time on your Sharp Atomic clock, you will need to reset the time zone. To do this, press and hold the "Time Zone" button for 3 seconds until the time zone flashes. Then, press the "Hour" and "Minute" buttons to adjust the time zone to the correct time zone. Once the time zone is set, press the "Time Zone" button again to save the settings. The clock should now be displaying the correct time.

You can download the manual for free using this link:

http://dl.owneriq.net/8/82dd8645-ef03-4b41-9b07-5a6b02655a1d.pdf

Setting and Using the Alarm
1. Press the AL SET button. The time will flash.
2. While the time is flashing press the HOUR button until you reach the correct hour. Then
press the MIN button until you reach the desired minute.
3. After 5 seconds the alarm set time will stop flashing and it will be programmed, or you may press
the AL SET button.
Note: The PM indicator also applies to the alarm. You can review the alarm setting anytime by
pressing the AL SET button.
4. To activate the alarm you may choose one of 3 wake options:
a. To wake to BUZZER press the AL MODE button once.
b. To wake to a SOUND press the AL MODE button a second time. It will set to the last
sound you listened to. If you wish to change it press the sound you wish to
wake to and then press the POWER button.
c. To wake to RADIO press the AL MODE button a third time. You may leave it on the
current station or adjust the TUNER.
Note: A green LED will appear next to the wake mode selected to indicate the alarm is set.

Thanks.
gylacz

This clock radio features a dual alarm system, with two separate alarms that can be operated independently. The alarms can be set to wake two people at different times, or to have a main alarm and a backup. One alarm features your choice of radio stations as an alarm wake sound, while the second features a buzzer wake sound. You can set the radio alarm, the buzzer alarm, or both alarms.
Setting Radio Alarm
1. Press the "Alarm Set" Button. The display will flash and the Radio Alarm Indicator will appear. If you do not begin setting the time within ten seconds of pressing the it, the display will stop flashing andd you will need to press the "alarm Set Button again. 2. While the display flashes, press the "Tuning/Set" Buttons to set the wake time. Hold a button for a few seconds to advance the time rapidly. Be sure to set the correct AM/PM time, as shown by the PM Indicator. 3. After setting the radio alarm time, you will need to select the station to wake up to. First, press the "AM/FM" Button to select a radio frequency. Next, select a station using the "Radio Preset Buttons". Rotate the Volume Thumbwheel to set a wake sound volume level. 4. After setting the radio alarm wake time and sound, you will need to select your 7-5-2 setting. The 7-5-2 setting lets you set the alarm for a full week, weekdays only, or the weekend. Before setting the alarm, be sure that the correct date is set. 5. After you have set the radio alarm wake time, wake sound, and 7-5-2 setting, press the "Alarm Set" Button twice so that the display shows the standard, non-flashing display.
Setting Buzzer Alarm
1. Press the "Alarm Set" Button twice. The display will flash and the Buzzer Alarm Indicator will appear. 2. While the display flashes, press the "Tuning/Set" Buttons to set the wake time, as described above. 3. After setting the buzzer wake time, use the "Date/7-5-2" Button to select the buzzer. 4. After you have set the buzzer wake time and 7-5-2 setting, press the "Alarm Set" Button once so that the display shows the standard, non- flashing display.
Activating the Alarms
1. To activate the radio alarm, press the "Radio Alarm" Button so that the Radio Alarm Indicator appears on the display. As long as this indicator appears, the alarm will sound at the set time and days. 2. To activate the buzzer alarm, press the "Buzzer Alarm" Button so that the Buzzer Alarm Indicator appears on the display. As long as this indicator appears, the alarm will sound at the set time and days. 3. When the alarm sounds, press the " Off/Reset" Button to turn off the alarm while still maintaining the programmed 7-5-2 alarm settings. To turn off an alarm and cancel its 7-5-2 settings, press its "Alarm Button" so that its Alarm Indicator no longer appears on the display. 4. To activate the snooze feature, press the "Snooze/Night-Light" Bar when the alarm sounds. The alarm will shut off for approximately nine minutes before sounding again. The feature can be repeated several times during the one-hour snooze cycle. 5. If it is not turned off, the alarm will sound for an hour before stopping. As long as an Alarm Indicator appears on the display, the alarm will sound at the set time, according to the 7-5-2 settings.

goto http://voxrightnow.custhelp.com/app/answers/detail/a_id/12057/~/operating-the-rca-rp4803-clock-radio
or follow instruction

1. Press the SET button until WAKE 1 / WAKE 2 icon is blinking.
2. Press REV or FWD to set the wake time. The time decrements or increments will follow by a faster rate when you press and hold either REV or FWD.
3. After the WAKE time is set, press SET repeatedly until no icon is blinking.

Tips:

• The unit equips with GRADU- WAKE feature, the alarm tone volume will increase gradually to its maximum in about 30 to 45 seconds.
• If you set the SLEEP function with low volume level before going to bed, we advise using WAKE mode to wake you up since its volume will automatically increase.

Waking by Selected Source: You may be woken up by WAKE, RADIO or CD.

1. Select an AM or FM station.
2. Set wake time (see above directions).
3. Press WAKE 1 or WAKE 2 to select waking up by WAKE, RADIO or CD. Corresponding indicator will be shown next to the selected setting.
4. Adjust the volume by turning VOL.

You can select your CD wake track by the following procedures:

1. Make sure you have inserted a CD.
2. While holding WAKE UP CD TRACK, press REV or FWD to select your desired CD wake up track.

Press the Clock Set button on the top of the clock radio. Press either the forward or reverse (skip) buttons to change the time. Press and hold the button to get the time to change faster. Make sure the AM/PM indicator is correct for the current time. Then press Clock Set or wait 5 seconds without pressing a key to exit the time set mode.

You set the alarm time similarly after pressing Wake Time. Make sure the Wake Mode is set to alarm, radio or CD.

The manual for the clock is available at the RCA site: http://www.rcaaudiovideo.com/search/?km=RP5605 .

I hope this helps.

Cindy Wells

Press and hold Set until a little clock is displayed. Then use the forward/reverse buttons to change the time (you will see A.M. and P.M. indicators). The buttons are all on the right side of the clock radio. Then press Set again to leave the time set area. As you press Set again, you will be able to set the alarm time (Wake 1 and Wake 2) by pressing the forward/reverse buttons as well.

If any icon is flashing, press Set repeatedly until they stop.

I hope this helps.

Cindy Wells

Setting Clock
1. Press SET repeatedly until a clock icon
shows on the display.
2. Press REV or FWD to set the clock
time. The time decrements or
increments will follow by a faster rate
when you press and hold the buttons.
AM or PM icon will also show beside
the time.
3. Press SET when finished.
Setting Wake Time
This unit allows two wake times to be set.
1. Press SET repeatedly on the top of the
unit until you see WAKE 1 or WAKE 2
flashes on the display.
2. Press REV or FWD to set the respective
wake time. The time decrements or
increments will follow by a faster rate
when you press and hold the buttons.
3. Press SET repeatedly until you see no
WAKE 1, WAKE 2 or icon the
display.
Selecting Wake Source
You may be woken up by radio, CD or alarm.
1. If your desired wake source is radio or
CD:
• Wake by radio - select an AM or FM
station (see directions on “Radio”).
• Wake by CD - insert a CD in the CD
compartment. If you want to be
woken up by a specific track on the
CD, press and hold wake up - cd
track on the top of the unit and at the
same time press REV or FWD to select
a desired track.
2. Set a wake time (see above direction).
3. Press WK-1 or WK-2 repeatedly at the
front of the unit to select a waking
mode. Corresponding icon lights on
the front of the unit.
- Wake 1 by alarm
- Wake 1 by radio
- Wake 1 by CD
In case of Wake 2, “2” shows at the
centre of the icons.

-Press SELECT once and time number should flash.
-Press and hold SELECT and it will enter settings mode for the clock.
-At the bottom of the screen next to the moon phase you should now see PST time zone.
-UP and DOWN keys will change the time zone.
-Press SELECT and other clock settings can be changed.

Press the SET button until you cycle through the alarms and the Colons on the time start to flash. use the right and left arrows from the CD buttons to adjust time; After time is set; press the SET button. Be careful to not fat finger and hit the CD button when pressing the SET buttons. That will turn on the AWFUL NAP timer. That's another headache.

. Stop the Nap alarm Press NAP to start NAP flashing. Press and hold NAP to cancel the nap setting. If this does not work; try again. It seems to take me a time or 2 to get it to work.

Slide the switch with a lock, wake 1, wake 2 and clock to the clock position. Using the backwards and forwards buttons get time to the correct time. When correct time is reached, slide the switch to the lock position. Time will now be set.

Manual can be found in PDF form from RCA here: http://support.rcaaudiovideo.com/Downloads.ashx?prodid=56&mediaid=620&force=true&file=products/RP5430/media/RP5430_UMEN.pdf