In a message dated 6/20/03 10:31:33 AM Eastern Daylight Time,=20 gulftech@xxxxxxxx writes: > Q5H4 =3D 2SA933 Used 2SA1015. Ken, What is the function of this transistor? Dominic DiLeo Atlantic TV Freeport, Maine +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Bob, You are a genious! I had changed the two caps you mentioned and checked Q5H4. What I didn't check was E-C. It was leaky. Wouldn't know it unless it were pulled from the set. Q5H4 =3D 2SA933 Used 2SA1015. Thank you SO much! On Fri, 20 Jun 2003 08:33:37 -0400 "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx> writes: > Ken, > Replace C916 and C5H9 (47mfd/50V) which is a common failure. Also=20 > check Q5H4 > and R5K7. >=20 > Bob Waterman, CET=AE #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 >=20 > ----- Original Message -----=20 > From: <gulftech@xxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Thursday, June 19, 2003 7:47 PM > Subject: [TechAssist] Mitsubishi CS2715R, Pulses at turn on >=20 >=20 > > This set has been a nightmare. Came in first time for "dark=20 > picture and > > buzzes." Replaced 20-25 bad caps. Sent home. Two weeks later,=20 > back for > > "Takes a long time to come on." > > > > When power is pushed, power relay clicks, then pulses. By that I=20 > mean > > click..click..click. Starts out at about one second intervals. =20 > This > > interval decreases--the clicks comes faster. After 30 seconds or=20 > so, set > > stays on, picture perfect. After on for a few minutes, set turns=20 > off and > > on at will. Unit must be left off for some time for the problem to > > happen again. > > > > Feel like it must be a cap in the power supply, but can't find it.=20 > Have > > ESR'd all the caps on the deflection/power supply board, found two=20 > more > > bad, but no change. I have resoldered the board and cleaned it=20 > from old > > electrolyte leakage. Have no print. Maybe the standby to the=20 > power > > relay is low. Real tough set to work on. > > > > Hope someone has a clue. > > > > TIA, > > > > > > Ken Smith > > Gulf Technical Services > > 3034 Gulf Breeze Parkway > > Gulf Breeze, FL 32563 > > 850-934-8324 (Voice) 850-932-0819 (Fax) > > > > ***************************************************************************** CHECK OUT THE NEW CHATROOM! Just login and click on chat! http://www.tech-assist.org/secure/tip/main.htm The Tech Address Book: http://www.tech-assist.org/secure/tip/contact.htm Add a Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.htm Lost Password: http://www.tech-assist.org and select "Lost your Login Info?". Email Archives: //www.freelists.org/archives/techassist/