Need help setting the time on a Spectra Studebaker SB2103 clock radio. When I press the clock/adj program button, the hour will blink; if I press it again, the minutes will blink, and so forth. But when I press the only keys on the front that look like arrow keys, numbers (hours or minutes) do not move forward or backward. If I hold down the clock/adj program key, the numbers just continue to blink -- no change. Can anyone help with this? The clock radio (with CD player is one we've had for awhile, so it's not brand new. Don't have the manual.) Thanks.

There is 2 different radios. With or without rds. Here are the instructions for both.
Setting the Time for Radios with Radio Data Systems (RDS) To set the hour, press the clock button. The clock symbol displays and the hour flashes. Turn the ADJ (adjust) knob to increase or to decrease the hours. To set the minutes, press the clock button again. The minutes. Turn the ADJ knob to increase or to decrease the minutes. The time can be set with the ignition on or off.
To synchronize the time with an FM station broadcasting Radio Data System (RDS) information, press and hold the clock button to enter the clock set mode, then press and hold the clock button for three seconds until UPDATED displays. If the time is not available from the station, NO UPDATE displays.
RDS time is broadcast once a minute. After tuning to an RDS broadcast station, it can take a few minutes for the time to update.
Setting the Time for Radios without Radio Data Systems (RDS) To set the hour, press the clock button. The clock symbol displays and the hour flashes. Turn the ADJ (adjust) knob to increase or to decrease the hours. To set the minutes, press the clock button again. The minutes flash. Turn the ADJ knob to increase or to decrease the minutes. The time can be set with the ignition on or off.

SETTING THE CLOCK1. Press the Power Button to turn the unitoff.2. The Power Indicator Light will illuminate red, indicating that the unit isin Standby Mode.3. Press the Mem/Clk Adj Button.4. The Hour will begin to blink.5. Press the Skip/Tune Buttons to adjustthe hour.6. Press the Mem/Clk Adj Button to set thehour.7. The Minute will begin to blink.8. Press the Skip/Tune Buttons to adjustthe minute.9. Press the Mem/Clk Adj Button to set theminute, and finish setting the clock.

With the radio turned off-press and hold the clock button until the hour flashes- use the select buttons to move number up or down. Press button to make minutes flash and adjust as above. To set the alarm press the display button until hours start flashing and change with the select buttons. Use the clock button to change from hours to minutes and also from alarm1 to alarm2.

The manual:

http://www.retrevo.com/support/GPX-HM3817DT-manual/id/1183ag710/t/2/

Page 6>>>>

Setting the Clock
a. Press the STANDBY button until the unit is in standby mode.
• When the unit is in standby mode, the STANDBY button will be red.
b. Press the CLK ADJ. button. The time will begin to blink.
c. Press the HOUR and MINUTE buttons to adjust the hour and minute.
d. Press the CLK ADJ. button to set the adjusted time.
Setting the Alarm
a. Press the STANDBY button until the unit is in standby mode.
• When the unit is in standby mode, the STANDBY button will be red.
b. Press the ALARM SET button. The time will begin to blink.
c. Press the FUNCTION button to seleect CD, Radio, AUX, or Buzzer.
• For Buzzer mode, the display will not show any indication.
d. Press the HOUR and MINUTE buttons to adjust the hour and minute.
e. Press the ALARM SET button to set the adjusted alarm time.
• An alarm clock icon will appear on the LCD Display when the alarm is set.

Without Radio Data Systems (RDS): To set the hour, press the clock button. The clock symbol will appear on the display and the hour number will flash. Then turn the ADJ knob to increase or todecrease. To set the minutes, press the clock button again. The minute numbers will flash. Then turn the ADJ knob to increase or to decrease. The time can be set with the ignition on or off.
With RDS: Same as without RDS unless you want to Sync. with a radio station. To synchronize the time with an FM station broadcasting Radio Data System (RDS) information, press and hold the clock button to enter the clock set mode, then press and hold the clock button for three seconds until UPDATED appears on the display. If the time is not available from the station, NO UPDATE will appear on the display. RDS time is broadcast once a minute. After tuning to an RDS broadcast station, it may take a few minutes for the time to update

To set the hour, press the CLOCK button. The clock symbol displays and the hour flashes. Turn the ADJ (adjust) knob to increase or to decrease the hours. To set the minutes, press the CLOCK button again. The minutes flash. Turn the ADJ knob to increase or to decrease the minutes. The time can be set with the ignition on or off.
To synchronize the time with an FM station broadcasting Radio Data System (RDS) information, press and hold the clock button to enter the clock set mode, then press and hold the clock button for three seconds until UPDATED displays. If the time is not available from the station, NO UPDATE displays.
RDS time is broadcast once a minute. After tuning to an RDS broadcast station, it can take a few minutes for the time to update.

Mantain pressed the CLOCK-ADJ button and turn de big silver knob to the left for setting the hour or the right for setting minutes. Then release the CLOCK-ADJ button.

Setting the clock - must be done in standby mode.

Press PROG/CLOCK ADJ button . Either 12H or 24H will display.
Choose your preference by pressing the >>| button, then press PROG/CLOCK ADJ button
Press>>| button for HOUR setting, then press PROG/CLOCK ADJ button to store
Press >>| button for MINUTES setting, then press PROG/CLOCL ADJ button to store.

1. using the Source button put the unit in "stand-by" which is where only the clock is displayed but no radio, cd is playing just clock.
2. press and hold the "F" or function button will get you into the set--up mode where you toggle thru the choices using the ff/rw buttons until "CLK ADJ" appears press the display button and that will bring up the blinking clock which you adjust hours with the same FF/RW arrows when you get the correct time hit "F" button to return to menu.

I did not find my manual, but this worked for me. Set the clock to be a 24 hour clock by pressing and holding the Memory/Clock Adj button. The display will show 24h or 12h. Use the fast forward button to change from 12h to 24h. Press the Memory/Clock Adj button again and use the fast or reverse forward buttons to change the time to read, for example, 13:00 instead of 1:00 if the time is 1pm. Press the Memory/Clock Adj button again to set the minutes.When you are done setting the time, press and hold the Timer/Sleep button. Either a time or "0:00" will appear in the display with the word "TIMER" flashing above it. Quickly press and hold the Memory/Clock Adj button until the first digit in the time starts flashing. Set the hour that you wish the alarm to sound using the fast or reverse forward buttons, just like you do for setting the time. Press the Memory/Clock Adj button again to set the minutes, and one more time to finish. The word "TIMER" will stop flashing and go solid, and the display will return to the time of day. When the alarm sounds, you can hit Snooze which will give you 5 more minutes, or you can turn the Clock Radio off. Pressing the Timer/Sleep button again will turn off the timer (alarm) and pressing and holding it again after that will turn it back on.