Author Topic: UPDATE ON TECHNOSONIC LCD3251/MEDION 30112  (Read 7980 times)

0 Members and 1 Guest are viewing this topic.

brian

  • Sr. Member
  • ****
  • Posts: 119
UPDATE ON TECHNOSONIC LCD3251/MEDION 30112
« on: December 28, 2007,05:59:27 »
HI
AFTER CAREFULLY FITTING MOD KIT63,(MANY THANKS TO TMG).UNFORTUNATELY,AT SWITCH ON POWER SUPPLY STILL DEAD,BUT AT LEAST NO MAINS  FUSE BLOWING. THERE ARE SOME VOLTAGES TO BE FOUND BUT WITH NO CIRCUIT DIAGRAM, THESE ARE PRETTY MEANINGLESS!,
HELP!!!
 WISHING YOU ALL A HAPPY NEW YEAR
 BRI.

Mulja tv repair portal

UPDATE ON TECHNOSONIC LCD3251/MEDION 30112
« on: December 28, 2007,05:59:27 »

Tmg

  • Full Member
  • ***
  • Posts: 82
Re: UPDATE ON TECHNOSONIC LCD3251/MEDION 30112
« Reply #1 on: December 29, 2007,10:18:52 »
Bri
change any 1000uf caps eg c330 ?

Maxim 26"+ Power Supply Repair Kit 
There is now a power supply repair kit available for Maxim 26"+ Power supplies (with and without sound output stage).
Firstly, measure the primary side resistance of TR20, it should be approximately 4 ohms on a good working transformer. If it is not 4 ohms, the transformer needs replacing before fitting the repair kit.

The power supply repair kit includes:

F300 - F3.15A - 067420001811
D315 - 12V Zener - 048320605201
D318 - 2.4V Zener - 048100255131
Q300 - BC337 - 046247018001
IC21 - FSD200 - 045000000281
IC30 - ICE1QS01 - 045000003631
D325 - 1N4007 - 04832142301

Applies to PSU pcb which do not have the sound output stage built onto the power supply.

C210 1000uF 25V 20% 105°C replace with -> 470uF 35V 20% 105°C
C211 delete.
L200 20uH 2.5A replace with -> Jumper Wire


« Last Edit: December 29, 2007,10:23:57 by Tmg »

Mulja tv repair portal

Re: UPDATE ON TECHNOSONIC LCD3251/MEDION 30112
« Reply #1 on: December 29, 2007,10:18:52 »

 

download