[TechAssist] Re: Mitsubishi CS-31303, no vertical deflection.

  • From: "majorthom@xxxxxxxxxxxxx" <majorthom@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Sat, 18 Jun 2005 11:07:19 -0700 (PDT)

borrow 60 cycle from somewhere and trigger chip-don't forget small coupling 
cap[not electrolytic]
Jim Myers <jr.myers@xxxxxxxxxxx> wrote:Yes, replacing the resistor did restore 
VCC to the chip and no I did not 
replace the output IC yet since I will have to order it. I am sure that 
a vertical drive signal is required for the output IC to produce 
deflection and there is none on any of the 9 pins so I would like to 
know where this drive signal comes from since I will probably have to 
order two IC's.
Guess I'm so used to reading between the lines now I'm starting to write 
between the lines too. Sorry about the omitted information.


********************************
Since 1972 *
Jim Myers *
Telrad Electronics *
Fort Wayne Indiana *
********************************


Phil Bader wrote:
> First, did replacing the resistor RESTORE Vcc to the chip? I would 
> assume so, but you didn't say. The open resistor would confirm a bad 
> vert output. You also omitted if you changed the IC401, which should be 
> automatically done in this case before going on to other possibilities..
> Let us know.
> Phil Bader
> 
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
> 
> 
> 
> Jim Myers wrote:
> 
> 
>>Found R570 open and no 28V to vertical IC401, replaced it but still no
>>vertical. I don't see any drive signal to IC401 a TA8427K. Any tips for
>>this problem?
>>
>>Thanks,
>>
>>********************************
>>Since 1972 *
>>Jim Myers *
>>Telrad Electronics *
>>Fort Wayne Indiana *
>>********************************
>>
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Peter Neal
Neal Electronics
1905 E. Wm.Cannon
Austin,TX  78756
 
 
 







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