Boy, that's a cool name.
Anyway, after snooping around, I found R607 & R610 (both 12 ohm/ 3 watt) open. They're on the way. I'll check back with results.
Thanks,
Joe
Joe Tech2004 wrote:
Joe, SANYO DS31590 For what it's worth....... "joe" ---------------------------------------------- Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com ---------------------------------------------- SANYO DS31590
Dead
Q831 (Reset Transistor) 2sa1015 ---------------------------------------------- SANYO DS31590
Dead
F601 T4a
D601-D604 Nte 125
Replace Capacitor 470/200v ---------------------------------------------- SANYO DS31590 Dead - No Pix Or Sound - Possible Lightning Ic301 Comb Filter P/N:
Tc90a44p Due To Lightning. This Ic Was Good But They Are Prone To Get
Blown Out From Lightning. This Unit Only Took Out These Two Diodes: D311 Leaky Zenner 4.7
D312 Regular Signal Leaky. ---------------------------------------------- SANYO DS31590
Dead Set:Lightning/Surge Any/All:D601-4(Two Of The 4),Q601(2sc4423/2sc3277),Q604(2sc3807),Q605
(2sc1815),D612(Tlp621/Pc817/On3131s),Ic601(Se130n),F601(Gma 4a), Ic681
(La78l05) ---------------------------------------------- SANYO DS31590
Dead, After Surge Replaced Fuse And Rectifiers And Hv Fires, But Brain Dead. Replaced 5v
Regulator, Ic681 (Ecg 977) And Got Tuning, Sound, Etc., But Now Won'T
Turn Off. Replaced Q681 (Ecg85) And All'S Well. ---------------------------------------------- SANYO DS31590
Dead, After Surge Repaired Primary Side, Q601, Q604, Q605 All Shorted. Also Had Caps C609
Blown Apart And C626 Bulged Like A Balloon. Set Still Dead. Replaced
Ic601 Even Though It Checked Ok. Found Q695 Leaking. Q695 Is
2sa608f. Replaced It With A Tcg290a. ---------------------------------------------- SANYO DS31590
Dead, After Surge
Q402 Hot Shorted - D1879
D612 Opto-Isolator Open - Pc817
Q635 - Control Or Driver For Opto C536 Sub Nte 85 Shorted Q695 A608 Sub Nte
290a Shorted Q693 - C536 Sub Nte 85 Shorted Ic681 -
5v Regulator Ic 78l05 Shorted D1901 - 7.5v Zener (Protect Diode I'M Guessing For 5v Protection)
Leaking. Note: When Replacing Hot I Strongly Recommend Testing For Regulation Before Powering Set Or The B+ Will Shoot To Over 200v And Destroy Any
Hot. This Can Be Done Simply By Leaving The Hot Out Of Circuit And
Hooking 40 To 100w Light Bulb From Collector To Gnd And Plugging Set In
Without Turning On And Check B+ For 75 To 80v. Then You May Power Set Up
If It Will And Check B+ For 130v. ---------------------------------------------- SANYO DS31590
Dead-(Lightning Strike)-Fuse Blown Q601(C4423 Or Ecg2324),Q604(C3807 Or Ecg2504),Q605(A1015 Or Ecg290a),
D612(Pc817 Or Ecg3098),4a Gma Fuse ---------------------------------------------- SANYO DS31590
Dead-No Relay-Possible Surge Q605(Ecg290a) And Q604(Ecg2504) In Power Supply. ---------------------------------------------- SANYO DS31590
Dead. Hot Shorted
Q402 (Ecg2331)
Q605 (Ecg290a)
D610 (Ecg519)
R603 (100k) ---------------------------------------------- SANYO DS31590 Dead. Was Shutting Down Periodically Before Dead Hot B+ Was Under 100v
At Power On, 80v In Stand-By. Stand-By 80v Was Ok, But Flyback Was
Pulling Down Hot B+ At Turn On. Fly Rang Good. L40a00711 645 018 9579 ---------------------------------------------- i replaced shorted SMP output and drive transistor. now it starts but
runs only in standby half voltages. as per a tip i shorted q-693 base to
ground and the set plays fine. i cant find any shorted diodes or
transistors. this must be a common problem with this model. i have 2
here with the same symptom. =============================== [EMAIL PROTECTED] From: [EMAIL PROTECTED] (Joe Dickerson)
Date: Mon, Jan 26, 2004, 10:46am (EST-1) To: [EMAIL PROTECTED]
Subject: [Techs] Sanyo DS31580..Chassis 31580-00....shuts down..
Reply to: [EMAIL PROTECTED] (ELECTRONICS PROFESSIONALS LIST) Replaced:
shorted Q402 (HOT) D1880
IC601 STR30130 I have 107 VDC on pin 3 (input) and pin 4 (output) Set will come on for
a short term (approx. 5-8 sec.) and shut down. Anyone have a schematic
on power supply or been here...done that? Thanks, Joe
-- Joe's Tv & Appl. Joe Dickerson Rt 1 Box 3781 Jasper, Texas (409) 384-3325 (409) 384-9298 fax
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