[TechAssist] Re: {Spam?} Re: Panasonic D552 (RH3F) SHORTED - Which Sub?
- From: Bil Green <tv.vcrrepair@xxxxxxxxxxx>
- To: George <techassist@xxxxxxxxxxxxx>
- Date: Wed, 14 Jan 2004 14:11:07 -0800
Hi Keith,
As someone just said distilled water does not conduct (no minerals).
Even though the ice cubes contain minerals (I use regular ones) I
still don't have a problem (as they melt). Saves a bunch of time
and parts while troubleshooting.
--
Best regards,
Bil Green
2001 TV VCR
Mammoth Lakes, CA 93546
760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
Wednesday, January 14, 2004, 12:53:56 PM, you wrote:
G> Distilled water is non conductive, it's the minerals in the water that make
G> it conduct.
G> George
G> Afana Electronics
G> Moreno Valley, CA
G> ----- Original Message -----
G> From: "Keith Trumbla" <keith@xxxxxxxxxxxxxxxxxx>
G> To: <techassist@xxxxxxxxxxxxx>
G> Sent: Wednesday, January 14, 2004 9:07 AM
G> Subject: [TechAssist] Re: {Spam?} Re: Panasonic D552 (RH3F) SHORTED - Which
G> Sub?
>> Bill, are you saying you put the HOT in the water without any insulation
>> around it? Won't it arc and boil the water ?
>> Keith Trumbla
>> BEMelectronics.com
>> Suite 212-530 Century St.
>> Winnipeg Canada
>> R3H 0Y4
>> Ph.204.775.2875 Fax.204.774-9192
>> ----- Original Message -----
>> From: "Bil Green" <tv.vcrrepair@xxxxxxxxxxx>
>> To: "Al Gutz" <techassist@xxxxxxxxxxxxx>
>> Sent: Wednesday, January 14, 2004 3:19 AM
>> Subject: [TechAssist] Re: {Spam?} Re: Panasonic D552 (RH3F) SHORTED -
G> Which
>> Sub?
>>
>>
>> > Hi Al,
>> >
>> > Thanks Al. I already ordered some Pana. diodes. Good idea though. I
>> > use all sorts of tricks for testing. Like wiring in a HOT with clip
>> > leads, and if it has been running way too hot (on the heat sink) I
>> > sometimes place it in a glass of distilled water with ice cubes
>> > (don't have to be made from distilled water).
>> >
>> > Can't overheat, lots of time for tests
>> >
>> >
>> >
>> > --
>> > Best regards,
>> >
>> > Bil Green
>> > 2001 TV VCR
>> > Mammoth Lakes, CA 93546
>> > 760-934-2001 mailto:tv.vcrrepair@xxxxxxxxxxx
>> >
>> > Tuesday, January 13, 2004, 7:51:30 PM, you wrote:
>> >
>> > AG> For test purposes you can series up 2 of those MUR diodes to see if
>> > AG> everything else is working.
>> >
>> > AG> Al G
>> >
>> > AG> Gary McCartney wrote:
>> > >>
>> > >> Bil, sorry I didn't realize the original was rated at 1500V.
>> > >>
>> > >> I'm guessing that the damper must have leaked, causing the HOT to get
>> > >> un-dampered pulses thus shorting it out.
>> > >>
>> > >> Gary McCartney
>> > >>
>> > >> McCartney Electronics
>> > >> Guelph Ontario Canada
>> > >> Est. 1984
>> > >> email: gary (at) number63.ca
>> > >>
>> > >> Bil Green wrote:
>> > >> >
>> > >> > Hi Gary,
>> > >> >
>> > >> > The original diode is rated at 1500V and supposedly a rectifier
>> cannot
>> > >> > be used as a damper. I do have the one you recommend (great
>> > >> > replacement for almost any larger diode). This is included in my
>> Super
>> > >> > Easy Diode Subbing. I obviously will have to order the original.
>> > >> >
>> > >> > But what caused the diode and HOT to fail together?
>> > >> >
>> > >> > Thanks much
>> > >> >
>> > >> > --
>> > >> > Best regards,
>> > >> >
>> > >> > Bil Green
>> > >> > 2001 TV VCR
>> > >> > Mammoth Lakes, CA 93546
>> > >> > 760-934-2001
>> mailto:tv.vcrrepair@xxxxxxxxxxx
>> > >> >
>> > >> > Tuesday, January 13, 2004, 1:06:26 PM, you wrote:
>> > >> >
>> > >> > GM> Try a MUR4100E. This diode is rated 1000V, 4 Amp, 75 nS
>> > >> >
>> > >> > GM> Gary McCartney
>> > >> >
>> > >> > GM> McCartney Electronics
>> > >> > GM> Guelph Ontario Canada
>> > >> > GM> Est. 1984
>> > >> > GM> email: gary (at) number63.ca
>> > >> >
>> > >> > GM> Keith Trumbla wrote:
>> > >> > >>
>> > >> > >> Bill is right, for some reason you can't sub that diode. I tried
G> a
>> few
>> > >> > >> different 5amp 1000V fast diodes and they all ran hot.
>> > >> > >> Keith Trumbla
>> > >> > >> BEMelectronics.com
>> > >> > >> Suite 212-530 Century St.
>> > >> > >> Winnipeg Canada
>> > >> > >> R3H 0Y4
>> > >> > >> Ph.204.775.2875 Fax.204.774-9192
>> > >> > >> ----- Original Message -----
>> > >> > >> From: <gulftech@xxxxxxxx>
>> > >> > >> To: <techassist@xxxxxxxxxxxxx>
>> > >> > >> Sent: Tuesday, January 13, 2004 1:41 PM
>> > >> > >> Subject: {Spam?} [TechAssist] Re: Panasonic D552 (RH3F)
G> SHORTED -
>> Which Sub?
>> > >> > >>
>> > >> > >> > Bill,
>> > >> > >> >
>> > >> > >> > I know of no substitude for that diode. See the post below on
G> a
>> similar
>> > >> > >> > set for some things to check.
>> > >> > >> >
>> > >> > >> >
>> > >> > >> >
>> > >> > >> > Ken Smith
>> > >> > >> > Gulf Technical Services
>> > >> > >> > 3034 Gulf Breeze Parkway
>> > >> > >> > Gulf Breeze, FL 32563
>> > >> > >> > 850-934-8324 (Voice) 850-932-0819 (Fax)
>> > >> > >> >
>> > >> > >> > ------------------------Post copied from
>> > >> > >> > 10/25/2003----------------------------
>> > >> > >> >
>> > >> > >> > Philip:
>> > >> > >> > Your problem is probably in the pincushion circuit.
>> > >> > >> > Check Q752 , 753 and 754 for shorts.
>> > >> > >> > Also check L751.
>> > >> > >> >
>> > >> > >> > Quoting Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>:
>> > >> > >> >
>> > >> > >> > > Dead. HOT shorted. Removed HOT Q551 (D1556), powered up with
>> about
>> > >> > >> > > +140VDC at collector trace.
>> > >> > >> > > Also found shorted D552 (# RH3F loc.in fly area) and
>> associated 10
>> > >> > >> > > ohm/2W resistor R764 open.
>> > >> > >> > > Replaced diode,HOT, resistor.
>> > >> > >> > > To eliminate possibility of shorted CRT, I unplugged CRT
>> board, and
>> > >> > >> > > removed anode wire which I inserted in a glass along with
G> my
>> HV probe.
>> > >> > >> > > Powered it on, with a burst of about 25KV anode voltage then
>> shut off
>> > >> > >> > > again.Just a click now. D552 shorted again. I do not have an
>> OEM diode
>> > >> > >> > > but used some heavy ,fast, 1 KV subs.D552 should be rated at
>> about
>> > >> > >> > 1500V
>> > >> > >> > > @2.5A according to web. Twice it shorted.
>> > >> > >> > > D552 goes directly to yoke. I rand yoke H windings: good. My
>> HOT is
>> > >> > >> > > still OK.
>> > >> > >> > > Need input here.
>> > >> > >> > > Phil Bader
>> > >> > >> > > --
>> > >> > >> > > Philip Bader
>> > >> > >> > > Jan Phyl TV Inc. (estab. 1976)
>> > >> > >> > > 3420 Recker Hwy. Winter Haven, Fl. 33880
>> > >> > >> > > Fax (863) 299-8821
>> > >> > >> > > email: tjanphyl@xxxxxxxxxxxxxxx
>> > >> > >> > > For Professional Technicians Only
>> > >> > >> > >
>> > >> > >> >
>> > >> > >> > On Tue, 13 Jan 2004 10:32:10 -0800 Bil Green
>> <tv.vcrrepair@xxxxxxxxxxx>
>> > >> > >> > writes:
>> > >> > >> > > Panasonic CT27SF22T1
>> > >> > >> > > 1995 27" TV
>> > >> > >> > >
>> > >> > >> > > Q551 (2SD1556 HOT) shorted
>> > >> > >> > > D552 (RH3F - Damper??) shorted
>> > >> > >> > >
>> > >> > >> > > Are there often other parts involved with this type of
G> failure
>> in
>> > >> > >> > > this
>> > >> > >> > > chassis?
>> > >> > >> > >
>> > >> > >> > > I rarely see a damper(?) shorted when the HOT fails
>> > >> > >> > >
>> > >> > >> > > Thanks
>> > >> > >> > >
>> > >> > >> > >
>> > >> > >> > >
>> > >> > >> > > --
>> > >> > >> > > Best regards,
>> > >> > >> > >
>> > >> > >> > > Bil Green
>> > >> > >> > > 2001 TV VCR
>> > >> > >> > > Mammoth Lakes, CA 93546
>> > >> > >> > > 760-934-2001
>> > >> > >> > > mailto:tv.vcrrepair@xxxxxxxxxxx
>> > >> > >> > >
>> > >> > >> > >
>> > >> > >>
>>
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>> >
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