[TechAssist] Re: Philips 25TR12 C102 chassis 25P606-OOAA
- From: "matt sherer" <m.sheer@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 3 Aug 2002 16:58:53 -0500
Larry is the base of q410 low in standby or just he emitter?
Gear Guy
Electronic repair
A/V systems design, maintenance and installation
AMX programming
Matt Sherer, CET
1411 Honeysuckle Lane
Champaign, IL 61821
(217)356-9479
m.sheer@xxxxxxxxxxxxx
----- Original Message -----
From: "Larry E." <videotech@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, August 03, 2002 4:39 PM
Subject: [TechAssist] Re: Philips 25TR12 C102 chassis 25P606-OOAA
>
> Walter, yes there is 5 volts on the emitter if R417 is pulled, base &
> collector read 2.64 & 2.54 ?
> now I`m really confused, Larry E.
>
> walter wood wrote:
>
> >Larry, try removing R417. Plug the set in and see
> >if there is 5vdc on the emitter of Q410.
> >This removes all the 5v sources to the micro.
> >Walter
> >--- "Larry E." <videotech@xxxxxxxxxxxx> wrote:
> >
> >>Walter, I pulled & Ohmed R406 & R402 because I
> >>only have 2.3v on
> >> Collector of Q404, they
> >>both check good so something further along is
> >>pulling my supply down,
> >>only have 1.2v on Q410`s
> >>emitter, 1.8 on base and 2.3 on collector. No 5 v
> >>line= no relay click,
> >>I`ll keep looking,
> >>thank you for your time and expertise,
> >>Larry E.
> >>
> >>walter wood wrote:
> >>
> >>>Larry, the regulated power supply on these
> >>>
> >>chassis
> >>
> >>>is very close.
> >>>The scan derived is different as is the micro.
> >>>The standby 5v is on the emitter of Q410 through
> >>>
> >>a
> >>
> >>>6.8 ohm resistor R417.
> >>>It then branches into 3 more 5 volt sources.
> >>>L417
> >>>L418
> >>>and through R305 and L315.
> >>>Q410 base looks like it is fed from the raw 156
> >>>volt b+ through F401,R406,R402,D415,D416 and
> >>>
> >>R416.
> >>
> >>>The collector of Q410 should have aprox. 6.6vdc
> >>>
> >>in
> >>
> >>>stand by.The emitter 5vdc and Base about 6.
> >>>IC 345 on the P6 is fed 5v on pins
> >>>17,13,18,36,40,16,48,34,33,32,30,31,and 44
> >>>
> >>through
> >>
> >>>the remote receiver.
> >>>Pin 17 also goes to the keyboard, and a stuck,
> >>>
> >>or
> >>
> >>>windex'ed button would kill the 5v.
> >>>HTH
> >>>Walter
> >>>--- "Larry E." <videotech@xxxxxxxxxxxx> wrote:
> >>>
> >>>>Hi guys, got a 25P6 chassis totally dead, No
> >>>>relay click, nothing. I
> >>>>haven`t got the print for a
> >>>>P6, I`m using a Y1/Y4 because the power supply
> >>>>
> >>is
> >>
> >>>>close. I have standby
> >>>>B+ out of the regulator IC
> >>>>to collector of Q403 the 9volt standby switch
> >>>>but emitter is 2 volts
> >>>>instead of 6.8, if the P6
> >>>>chassis works the same way as the Y1/Y4 this
> >>>>means I don`t have my 5
> >>>>volt line for the micro.
> >>>>The micros are both marked IC345 but they are
> >>>>different, any ideas??
> >>>>
> >>>>Larry Eastman
> >>>>American TV & Electronics
> >>>>Crystal River Fl.
> >>>>
> >>>>------------------------------------------
> >>>>To REMOVE your email address, click here:
> >>>> http://www.tech-assist.org/unsubb.html
> >>>>To CHANGE your email address, click here:
> >>>> http://www.tech-assist.org/change.html
> >>>>------------------------------------------
> >>>>***NEW*** Tips Added Instantly!!!***
> >>>>Submit Repair Tips here:
> >>>>http://www.tech-assist.org/secure/tip/
> >>>>
> >>>
> >>>=====
> >>>Walter Wood
> >>>Future Tech Home Center
> >>>2786 Hwy. 43 N.
> >>>Lawrenceburg Tn. 38464
> >>>931-829-3337
> >>>Fax 931-829-4044
> >>>mailto:wwood_38478@xxxxxxxxx
> >>>
> >>__________________________________________________
> >>
> >>>Do You Yahoo!?
> >>>Yahoo! Health - Feel better, live better
> >>>http://health.yahoo.com
> >>>------------------------------------------
> >>>To REMOVE your email address, click here:
> >>> http://www.tech-assist.org/unsubb.html
> >>>To CHANGE your email address, click here:
> >>> http://www.tech-assist.org/change.html
> >>>------------------------------------------
> >>>***NEW*** Tips Added Instantly!!!***
> >>>Submit Repair Tips here:
> >>>http://www.tech-assist.org/secure/tip/
> >>>
> >>>
> >>
> >>------------------------------------------
> >>To REMOVE your email address, click here:
> >> http://www.tech-assist.org/unsubb.html
> >>To CHANGE your email address, click here:
> >> http://www.tech-assist.org/change.html
> >>------------------------------------------
> >>***NEW*** Tips Added Instantly!!!***
> >>Submit Repair Tips here:
> >>http://www.tech-assist.org/secure/tip/
> >>
> >
> >
> >=====
> >Walter Wood
> >Future Tech Home Center
> >2786 Hwy. 43 N.
> >Lawrenceburg Tn. 38464
> >931-829-3337
> >Fax 931-829-4044
> >mailto:wwood_38478@xxxxxxxxx
> >
> >__________________________________________________
> >Do You Yahoo!?
> >Yahoo! Health - Feel better, live better
> >http://health.yahoo.com
> >------------------------------------------
> >To REMOVE your email address, click here:
> > http://www.tech-assist.org/unsubb.html
> >To CHANGE your email address, click here:
> > http://www.tech-assist.org/change.html
> >------------------------------------------
> >***NEW*** Tips Added Instantly!!!***
> >Submit Repair Tips here:
> >http://www.tech-assist.org/secure/tip/
> >
> >
>
>
> ------------------------------------------
> To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
> To CHANGE your email address, click here:
> http://www.tech-assist.org/change.html
> ------------------------------------------
> ***NEW*** Tips Added Instantly!!!***
> Submit Repair Tips here:
> http://www.tech-assist.org/secure/tip/
>
------------------------------------------
To REMOVE your email address, click here:
http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
http://www.tech-assist.org/change.html
------------------------------------------
***NEW*** Tips Added Instantly!!!***
Submit Repair Tips here:
http://www.tech-assist.org/secure/tip/
Other related posts:
