HANNspree 1E03-37GT Service Manual page 34

•The internal temperature of the unit has increased. Remove any objects blocking the vent
or clean as necessary.
Picture is cut off/with sidebar screen
•Is the image positioned correctly?
•Are screen mode adjustments such as picture size set correctly?
L
Check power ON
Signal circuit
SMPS No voltage output
SMPS no Power output
Yes
Check power PIN 9~11
Voltage +5V
Yes
Press RMU or Keypad
No/OFF key check PIN 1
voltage H or L
H
Check power PIN 2~4
voltage +12V
Yes
Check Main board
Regulator Circuit
No
Remove the power jack,check
the PIN 9~11 of SMPS still have
+5V
Check Main Bosrd Circuit
No
Check power PIN 2~4
Fuse or short to Ground
Check Main Board Circuit
30
Yes
No
Check SMPS
Yes
No