« previous next »
Pages: [1]   Go Down

Author Topic: HP ESG E4420B display problem  (Read 772 times)

0 Members and 1 Guest are viewing this topic.

Offline Stefano76Topic starter

  • Newbie
  • Posts: 1
  • Country: it
HP ESG E4420B display problem
« on: May 10, 2021, 11:26:35 am »
Hi everyone,

I'm trying to repair an HP ESG E4420B signal generator with no video on display (all black, but backlight is working), I think the the problem is in the VLCD voltage witch is not correct,
should be a negative voltage of about -6V and is not..

Can someone tell me witch transistor is Q601?
It's have a code M1LH written on it but I'm not sure if is a MMBT6429LT1G or something else.



Thank you in advance,

Stefano.
Logged
 

Offline maximvs

  • Newbie
  • Posts: 6
  • Country: us
Re: HP ESG E4420B display problem
« Reply #1 on: November 01, 2021, 02:58:16 pm »
Stefano,
Any luck with this ? Did you fix the display ?
Logged
 

Offline DeepLink

  • Regular Contributor
  • *
  • Posts: 117
  • Country: dk
Re: HP ESG E4420B display problem
« Reply #2 on: November 04, 2021, 05:59:35 am »
Q601 = MMBT6429LT1
Logged
 
Pages: [1]   Go Up
« previous next »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf

 


EEVblog Main Site EEVblog on Youtube EEVblog on Twitter EEVblog on Facebook EEVblog on Odysee