HanRongDa TR638 User Manual Download Page 5

upwards or downwards. Light press [        ] to confirm the time adjustment or simply stop the operation. The device will 

automatically confirm the last adjusted time within 10 seconds. 

Note: The time format for this product is the 12-hour clock system (LCD displaying "AM" represents morning time, and 

"PM" represents afternoon time). 

 

10: Scheduled Power-On Time Setting: 

10.1: Setting the Scheduled Power-On Time: In clock display mode, long press [        ] for 2 seconds. The LCD screen will 

display the scheduled power-on hour with "**" and "AL" characters flashing. Light press or long press [

] to adjust the 

scheduled power-on hour time upwards or downwards. Then, light press [          ] to move to the scheduled power-on minute 

time, which will also flash with "**" and "AL". Light press or long press [

] to adjust the scheduled power-on minute 

time upwards or downwards. Light press [          ] to confirm. If you stop the operation, the device will automatically confirm 

the adjusted scheduled power-on time within 10 seconds. 

10.2: Disabling the Scheduled Power-On Function: In clock display mode, when the LCD screen displays the "AL" character, 

light press [          ] to disable the scheduled power-on function, and the "AL" character will disappear from the LCD screen. 

 

11: Setting the Sleep Auto Shutdown Time:   

While the device is powered on or in a scheduled power-on state, long press [        ] for 2 seconds to activate the sleep timer 

setting.  The  LCD  will  display  "            120,"  and  the  "            "  symbol  will  blink  to  indicate  this.  light  press  [

 

]  to 

choose the sleep timer duration from options such as 120-110-100-90-80-70-60-50-40-30-20-10-OFF (in minutes). If there is 

no further input within 3 seconds, the LCD will return to the playback mode, and the blinking "            " symbol will cease. 

In this mode, the device will automatically power off within the selected sleep timer duration. 

 
12: Locking and Unlocking Function 

Long press [        ] for 2 seconds, and the LCD screen will display the "      " symbol, indicating that the device is locked.   

Long press [        ] for 2 seconds once more, and the "      " symbol will disappear, indicating that the device is unlocked. 

Note: The [                Volume Knob, OFF/ON Toggle Switch] are not affected by the lock, while other buttons are locked. To 

unlock, follow the steps above. 

 
13: Adjusting the Radio Backlight Brightness:   

Light press [          ] to adjust the backlight brightness. You can choose from three options: low brightness, high brightness, or 

turning off the backlight. 

14: Using the Antenna:   

When listening to FM and SW, extend the antenna and adjust its length and direction to find the best reception. 

*Tip: If you experience strong interference from a radio station causing channel overlap, you can mitigate it by adjusting the 

telescopic antenna to a shorter length. 

For AM broadcasts, this device utilizes a built-in magnetic antenna to receive medium wave signals. Magnetic antennas have 

some directionality when receiving signals. Therefore, when listening to medium wave broadcasts, try rotating the device to 

find the optimal reception position. 

 

 

 

Summary of Contents for TR638

Page 1: ...sy to understand This product offers versatile functionality In addition to the large tuning knob for station selection it also features a station auto tuning function supporting both full automatic r...

Page 2: ...y 1 Time Auto Power On Time Sleep Shutdown Time Setting Adjust the time settings using the button 2 Radio Operation Mode Light press to select the next station long press for automatic upward radio st...

Page 3: ...according to your needs Clock Display Mode Long press the button for approximately 3 seconds and the LCD screen will display the 10KHZ character Press the button again and it will toggle between the s...

Page 4: ...adio broadcast mode after storing radio stations using the methods described in sections 6 3 3 and 6 4 light press to select station numbers Each light press of or will change to the next stored radio...

Page 5: ...e LCD will display 120 and the symbol will blink to indicate this light press to choose the sleep timer duration from options such as 120 110 100 90 80 70 60 50 40 30 20 10 OFF in minutes If there is...

Page 6: ...256G Product Dimensions 218x128x73mm Net Weight of the Product 826g 16 Safety Precautions Before using the product please ensure that you follow these basic safety guidelines to ensure safe and reliab...

Page 7: ...ference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interfere...

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