[TechAssist] Re: Sony TV KV-1920 - Dead - Followup - Final Request
- From: "David Lessard" <mrfixit@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 28 May 2003 19:36:53 -0400
Things slowed down a bit around the shop so I decided to take another peek
inside this oldie. Here's what I know...disconnected +B from Q902
(horizontal SCR), loaded +B down with a 60W bulb, switched TV "on" and fuse
F650 remains intact. Disconnect 60W bulb load, reconnect +B to Q902 and fuse
pops. Q902 is not a horizontal output transistor but a horizontal output
SCR, interesting. No shorts from gate to anode or cathode, etc. Previously
replaced shorted D806 (damper diode), recently replaced Q650 (crow-bar SCR)
and C850. What else should I be looking for? What did I miss? Thanks.
David Lessard
Alexandria Electronics
Ontario-Canada
mrfixit@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of David
Sent: Friday, May 09, 2003 7:47 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Sony TV KV-1920 - Dead - Followup - 2nd
Request
Not sure exactly what I need. The problem is this, D806 shorted, fuse F650
opened. Replaced D806 and F650, TV stayed on for 20 seconds before F650
opened, D806 remained intact. Also, found C807 changed in value from 330uf
to 380uf. I'm looking for circuitry reference to those components. I thank
you kindly sir!
David Lessard
Alexandria Electronics
Ontario-Canada
mrfixit@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of D Thunhurst
Sent: Friday, May 09, 2003 5:59 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Sony TV KV-1920 - Dead - Followup - 2nd
Request
David,
Sams shows 1455, 1627, and 1708 for that model. I have all of those
numbers. Which one and which section do you need. I can run a scan on the
portion you need.
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: David <mrfixit@xxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Friday, May 09, 2003 10:10 AM
Subject: [TechAssist] Re: Sony TV KV-1920 - Dead - Followup - 2nd Request
>
>Do any of our members have a service manual or partial schematic on this
>model please!?
>
>David Lessard
>Alexandria Electronics
>Ontario-Canada
>mrfixit@xxxxxxxxxxx
>
>-----Original Message-----
>From: techassist-bounce@xxxxxxxxxxxxx
>[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of David
>Sent: Thursday, May 08, 2003 2:01 PM
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Re: Sony TV KV-1920 - Dead - Followup
>
>
>
>Replaced shorted D806 with ECG552. Replaced fuse F650 (2.5A), this fuse is
>on a small board with an SCR (Q650), not sure but I think it's part of the
>regulator circuit. TV fired-up for about 20 seconds then died. F650 opened
>again, D806 still intact. Note: C807 which should be 330uf reads 380uf, not
>sure of its function or if this could be causing F605 to open. A service
>manual sure would come in handy here. Any input would greatly be
appreciate.
>
>David Lessard
>Alexandria Electronics
>Ontario-Canada
>mrfixit@xxxxxxxxxxx
>
>-----Original Message-----
>From: techassist-bounce@xxxxxxxxxxxxx
>[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of David
>Sent: Thursday, May 08, 2003 12:57 PM
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Re: Sony TV KV-1920 - Dead
>
>
>
>No problem Bob, it's just that the ECG552 is only a 600V diode and the
>ECG551 is a 1500V diode. I wasn't sure if the ECG552 would work too. Again
>thanks, I'll try it and let you know how I make out. This sure is an old TV
>(1978).
>
>David Lessard
>Alexandria Electronics
>Ontario-Canada
>mrfixit@xxxxxxxxxxx
>
>-----Original Message-----
>From: techassist-bounce@xxxxxxxxxxxxx
>[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Gemini Computer &
>TV
>Sent: Thursday, May 08, 2003 12:33 PM
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Re: Sony TV KV-1920 - Dead
>
>
>
>>From the NTE cross reference program, the new part# 8-719-312-71 crosses
to
>an NTE552 as follows:
>
>Industry Number : 8-719-312-71
>NTE Device Number: NTE552
>RECTIFIER-SI,600 PRV,1A,DO-41
>
>The RS3FS number does as well:
>
>Industry Number : RS3FS
>NTE Device Number: NTE552
>RECTIFIER-SI,600 PRV,1A,DO-41
>
>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: "David" <mrfixit@xxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Thursday, May 08, 2003 12:13 PM
>Subject: [TechAssist] Re: Sony TV KV-1920 - Dead
>
>
>>
>> Bob, Is there an ECG equivalent? Do you think the ECG506 would be a
>suitable
>> replacement. Thanks for your opinion.
>>
>> David Lessard
>> Alexandria Electronics
>> Ontario-Canada
>> mrfixit@xxxxxxxxxxx
>>
>> -----Original Message-----
>> From: techassist-bounce@xxxxxxxxxxxxx
>> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Gemini Computer &
>> TV
>> Sent: Thursday, May 08, 2003 11:58 AM
>> To: techassist@xxxxxxxxxxxxx
>> Subject: [TechAssist] Re: Sony TV KV-1920 - Dead
>>
>>
>>
>> The original part (SID30-15) was Sony part# 8-719-900-15. It is now
>replaced
>> by an RS3FS, Sony part# 8-719-312-71 which is in stock at Tritronincs for
>> $5.20 if this helps you.
>>
>> 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: "David" <mrfixit@xxxxxxxxxxx>
>> To: <techassist@xxxxxxxxxxxxx>
>> Sent: Thursday, May 08, 2003 11:21 AM
>> Subject: [TechAssist] Sony TV KV-1920 - Dead
>>
>>
>> >
>> > Found D806 shorted (SID30-15). Crosses to ECG551 (discontinued). Does
>> anyone
>> > know what I could sub this part with?
>> >
>> > Thanks in advance.
>> >
>> > David Lessard
>> > Alexandria Electronics
>> > Ontario-Canada
>> > mrfixit@xxxxxxxxxxx
>> >
>> >
>>
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