[TechAssist] Re: Philips 27PT81S125, Ch. 27H800-7592. Remote not working
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 15 Sep 2003 07:15:25 -0400
It is very static sensitive!
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "D Thunhurst" <dthunhurst@xxxxxxx>
To: "TechAssist" <TechAssist@xxxxxxxxxxxxx>
Sent: Friday, September 12, 2003 7:08 PM
Subject: [TechAssist] Re: Philips 27PT81S125, Ch. 27H800-7592. Remote not
working
> Bob,
> Thanks for the information.
> You mentioned if I replace the SSB board, care should be taken for the
> alignment.
> What kind of alignment are we talking about and how difficult is it?
> Daryl
> Daryl's TV
> 3310 Dyer St.
> El Paso, TX 79930
> 915-565-9184
> 915-564-1024 Fax
> dthunhurst@xxxxxxx
> http://dynacomp.freeyellow.com
>
> >----- Original Message -----
> >From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, September 11, 2003 6:11 PM
> >Subject: [TechAssist] Re: Philips 27PT81S125, Ch. 27H800-7592. Remote not
> >working
> >
> >
> >> That sounds like it might very well be a defective SSB (small signal
> >board)
> >> to which I believe you were referring to.
> >>
> >> INFORMATION: When handling the Small Signal Boards for the H8
> >> chassis ALL E.S.D. PRECAUTIONS MUST BE TAKEN.
> >>
> >> This includes wrist strap to chassis ground (tuner) and anti static
> >> packaging of the SSB module. Remove all external chassis connectors
> >> (signal/AV/AC power) before changing the SSB.
> >>
> >> There is a common failure with a zener diode on the SSB which can cause
> >> various symptoms (Note: this diode is small and must be replaced with
> >> extreme care). See the following:
> >>
> >> SYMPTOM: No color at turn on (or at second turn on after AC break).
> >> This is more common with room temperatures below 70 F.
> >>
> >> SYMPTOM: No turn on from standby, most often after standby overnight
> >> and at room temperatures below 70 degrees F.
> >>
> >> CURE: Both symptoms are cured by replacing zener diode 6031 with
> >> Service Code 9322 131 13685, a 2.4 volt part or with 9340 548 42115,
> >> also a 2.4 volt part. This part is on the Small Signal Board. The
> zener
> >> is
> >> on the side of the SSB facing the tuner, just above pin 5 of IC 7066.
> >> The PWB is marked A and K. The end of the part with the bar is K.
> >>
> >> Also the cure can be made by replacing the SSB. Care in alignment is
> >> necessary
> >> if the SSB is replaced. The part number for the SSB module is
> >313917863191.
> >>
> >> Bob Waterman, CET® #RI-28
> >> Master Technician License #9109
> >> Service Manager / Parts Manager
> >> Gemini Computer, TV, & Security Alarms
> >> (508)695-7302
> >> (508)695-7769 FAX
> >> geminitv@xxxxxxxxxxxxxxxx
> >> geminitv@xxxxxxx
> >> www.geminicomputertvsecurityalarms.com
> >>
> >> ----- Original Message -----
> >> From: "D Thunhurst" <dthunhurst@xxxxxxx>
> >> To: "TechAssist" <TechAssist@xxxxxxxxxxxxx>
> >> Sent: Thursday, September 11, 2003 7:47 PM
> >> Subject: [TechAssist] Philips 27PT81S125, Ch. 27H800-7592. Remote not
> >> working
> >>
> >>
> >> > Hi,
> >> > I have a Philips 27PT81S125, Ch. 27800-7592 that the remote doesn't
> >> respond.
> >> > I tried another remote.. no go. I have 5 volts on the sensor and I
get
> >> > response on the output. I tried to trace it back to the micro but I
> >lose
> >> it
> >> > as the traces are so compact. I think it goes to a board that looks
> >> similar
> >> > to a computer board with several postage stamp sm IC's.
> >> > I would love to give this thing back to the customer but they insist
on
> >> > getting it repaired.
> >> > This appears to be a fairly new set and I am lost.
> >> > Any help would be appreciated.
> >> > Daryl
> >> > Daryl's TV
> >> > 3310 Dyer St.
> >> > El Paso, TX 79930
> >> > 915-565-9184
> >> > 915-564-1024 Fax
> >> > dthunhurst@xxxxxxx
> >> > http://dynacomp.freeyellow.com
> >> >
> >> >
> >> >
> >>
>
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