Power Up test 1 failed !HELP!
Posted: Sun Mar 04, 2018 8:54 pm
Dear all,
need some help with my DSO068 kit. I have soldered all the parts and also controlled them. Now I am at the point to do the the first power up test. Unfortunately it failed. After I pressed the switch SW12, the LED blinks once and the buzzer beeps once. But I didn't get the second blink or beep by buzzer. The voltages that I´have read out with multimeter:
+5V around JP4 = 5.04V
V- around LED = -4.98V
V5 = 3.57V
AV+ = 5.00V
AV- = -4.87V
V3 = -2,42V
V2 = 0V
V4 = -2.97
VB = 0.52V
VT = 2.34V
V1 = 0V
VA = 4.97V
LCD PIN 18 = -5.03V
SYSCLK = -2.58
VS+ = 4.25V
V+ = 4.25V
VBUS = 4.95V
- All BOB´s are installed.
- Have already replaced the crystal by an 16Mhz replacement. Nothing changed.
Any suggestions? or help? because would love to finish my small project .
Greetings!
CM
need some help with my DSO068 kit. I have soldered all the parts and also controlled them. Now I am at the point to do the the first power up test. Unfortunately it failed. After I pressed the switch SW12, the LED blinks once and the buzzer beeps once. But I didn't get the second blink or beep by buzzer. The voltages that I´have read out with multimeter:
+5V around JP4 = 5.04V
V- around LED = -4.98V
V5 = 3.57V
AV+ = 5.00V
AV- = -4.87V
V3 = -2,42V
V2 = 0V
V4 = -2.97
VB = 0.52V
VT = 2.34V
V1 = 0V
VA = 4.97V
LCD PIN 18 = -5.03V
SYSCLK = -2.58
VS+ = 4.25V
V+ = 4.25V
VBUS = 4.95V
- All BOB´s are installed.
- Have already replaced the crystal by an 16Mhz replacement. Nothing changed.
Any suggestions? or help? because would love to finish my small project .
Greetings!
CM