Search found 9 matches

by jeffgarwood
Mon Jan 26, 2015 2:24 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

I have proper power and backlight on screen, I can see the symbols at the bottom of the screen but I only have a black square in the middle when contrast is adjusted
by jeffgarwood
Thu Jan 22, 2015 7:18 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

as in scenario 2nI have 5V at test point 1 with or without JP4 closed but no proper voltage beyond that. The test results were: with j1 & J2 closed 5v at VBUS, 5Vdc at +5 chk left of sw12, .11vdc at Y1 pin 23, .11vdc at c 21 & C22, .54Vdc at J5 +5 test point .5vdc at LED. These have been my ...
by jeffgarwood
Thu Jan 22, 2015 2:28 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

I closed JP4 up until you had me close off the other just for troubleshooting. It did not change anything with the test results so I have waited your reply. It is closed now. Nobody ever replied about the board inserts touching. I have never had correct power from the beginning when I followed the s...
by jeffgarwood
Wed Jan 21, 2015 4:07 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

No JP4 is open
by jeffgarwood
Sat Jan 17, 2015 4:39 am
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

I am going to give you 2 scenarios both powered by the USB. first with J1 & J2 open the Vbus has 5vdc, 0vdc at +5 check spot left of sw12. .14vdc at y1 pin 23, .13vdc at c21 & 22. .5vdc at J5 +5 check pt. with j1 & J2 closed 5v at VBUS, 5Vdc at +5 chk left of sw12, .11vdc at Y1 pin 23, ....
by jeffgarwood
Thu Jan 15, 2015 9:02 pm
Forum: FG085
Topic: broken power switch
Replies: 1
Views: 3172

broken power switch

was working fine then power button quit locking in on position now no pwer to unit. what is the type of this 6 pin switch? I have not seen one searching the internet.
by jeffgarwood
Thu Jan 15, 2015 8:52 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

no low voltage after first +5 power check point for initial power-up test.
by jeffgarwood
Wed Jan 14, 2015 6:45 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

Re: DSO 068 Oscilloscope

Nothing on the screen. The LED does not blink for the second step test. I cannot get it to pass the power up tests so I have not soldered in the screen at this point. should I solder the body of the crystal to the contact or just the leads as I have done?
by jeffgarwood
Sun Jan 11, 2015 2:45 pm
Forum: DSO 068
Topic: DSO 068 Oscilloscope
Replies: 19
Views: 30367

DSO 068 Oscilloscope

I get proper power at the first check spot butlow voltage to Y1. I have verified all the solders are through the multi-layered board. I noticed that the brass inserts on the board between R1 and C4 are touching is that a manufacture error that is causing me problems?