[TechAssist] Re: Phillips 27" Console, 1989 model, dead, shorting picture tube.
- From: Jim Myers <jr.myers@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 04 Nov 2005 14:46:48 -0500
Sounds like a P1 chassis, here are some WinsTips:
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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PHILIPS P1
Dead
Electronic Horizons
Q420, Ic401, C430 .001/400, D430 Ecg580, R424
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PHILIPS P1
Dead
Q420, R424, C430 1000pf/400v
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PHILIPS P1
Dead
Q420 6105590k01, R424 0.27-1w 4835 1165 7056
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PHILIPS P1
Dead (Common Parts)
Q502 (2sd1555, Philips# 483513047835)
Q420 (Philips# 483513047068)
R424 (0.27 Ohm / 1 Watt, Philips# 483511657056)
C430 (1000pf, 400v, Philips# 483512147034)
D430 (Mur460, Philips# 483513037488)
R429 (24 Ohm / 3 Watt, Philips# 483511657043)
Ic401 (Philips# 483520987071)
C504 (10nf / 1.5kv, Philips# 483512147048)
C505 (680pf / 2kv, Philips# 483512247037)
Note: Some Of These Values May Differ For Different Screen Sizes, But
The Ones Listed
Above Are For The 27" Set.
Remember To Change R427 And R428 Regardless Of How They Read. These Are
Current Sense And Usually Go Off Value When Q420 Shorts. Don'T Measure
Them, Just Change Them. Either .18 Or .2 Ohm Depending On Screen Size.
Note: 483513047068 Is A Kit Containing The Following Parts:
1- Mosfet 006105590001 (Mth8n45)
3- Ferrite Beads 003640040009
1- 22 Ohm 1/4w Cf Resistor 002302812205
1- Installation Note 0017159900336
On Certain Versions Of The H1 Chassis The Resistor Replaces R419 And Use
All 3 Ferrite Beads On The Legs Of The Transistor. All Other Chassis'S
Use Only The Same Number And Placement Of Beads As Were Originally Used
And Disregard The Resistor.
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PHILIPS P1
Dead, No Sound Or Pix, No Fuses Blown
Larrys Tv
Replace Open R424 (.27 Ohms) Shorted C430 (1000uf @400vdc) & Shorted
Q420 (6105590001) Or 483513047062.
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PHILIPS P1
Dead. Fuse Blown
A Helper Elect
Yoke P/N 4835 150 17013 ($90) 362074-4 On Yoke, Q420 Ecg2393, D430
Ecg580, R424 .22 Ohm 1w
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PHILIPS P1
Dead. Pcb Burned At D430
Kirk Flushing Mi
D430 Shorted, Q420, Burned C430, Open R429, R424
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PHILIPS P1
Lightning Damaged, Dead Set...
D.A. Electronics
Q420, R424, R427, R428, R422, R449, R428, IC400, IC401, IC402 and Q450.
To test Main Supply out of Cabinet Remove R505 and Shunt Q433 Base to
Ground.
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The Old Master Technician
********************************
Since 1972 *
Jim Myers *
Telrad Electronics *
Fort Wayne Indiana *
********************************
Kevin's TV Repair wrote:
> Attention all Phillips experts. Sorry, I don't have the model number.
> The set is dead because the P/S mosfet, Q420, an MTH8N45 is shorted and
> R424 (0.27 ohms?) has a piece chipped off and is open. Do these
> commonly fail in this manner for no reason, or do I possibly have a
> picture tube that is shorting intermittently? I had another Phillips
> recently (older model) and I repaired bad connections in the horizontal
> only to have the picture tube arc and take out the P/S 3 weeks later. I
> was just wondering if it is worth it to take a chance on this one.
> Would isolating the heater circuit using the fly back wrap prevent the
> picture tube from taking out the P/S? Thanks.
>
> Kevin Wilks
> Kevin's TV Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
>
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