[TechAssist] [ FIXED ] - [Update] Mitsubishi CS-35401 Video comes and goes- Sound stays.

Phil,
This one listed directly below, is the one that fixed it !
C713  on Matrix board (4.7 @ 50 N.P.) was leaking REAL bad.
Thanks so much for helping me solve this problem.
I would NEVER have found this one by myself,.... NOT in 100 years.

Thanks again
LeRoy

****************
Model Number: CS-35301 Symptom: DELAY WHEN SW TO EXT VID Cause #1
1. HAPPENS WHEN SWITCHING FROM ANTENNA VIDEO INPUT TO EXT VIDEO INPUT.
DELAY IS APPROX 8-10 SECONDS. REPLACE C713 ON MATRIX PCB (4.7UF, 50V
NON-POLARIZED).
**************************
LeRoy Westlund
Westlund TV & Electronics
97 North Main                             " I forgot,..to remember,..
Centerfield, UT 84622-0087           to forget "
Ph./Fax  435-528-3822
mailto:LLW@xxxxxxxxxx

-----Original Message-----
From: tjanphyl@xxxxxxxxxxxxxxx <tjanphyl@xxxxxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Saturday, July 30, 2005 9:30 PM
Subject: [TechAssist] Re: [Update] Mitsubishi CS-35401 Video comes and goes-
Sound stays.


>LeRoy,I don't know how much here is duplicated,but I sent all I find
>on this model regarding any video failures.Sorry I don't seem to have
>a scemo.
>HTH.
>
>Model Number: CS-35401 Symptom: NO PIP VIDEO Cause #1
>1. CHECK C7026, AND C7036 BOTH 4.7 UFD 35 V PART # 181P504090 ON THE
>PIP PCB. 2. SUSPECT SUB-VIDEO SWITCH IC2002 (LA7956) PART #
>272P394010. LOCATED ON PCB-VIDEO. USE FOLLOWING LOGIC CHART TO
>CONFIRM: LOGIC PIN INPUT PIN 2 3 * HIGH = 5V TUNER 4 H H EXT 1 6 L H
>EXT 2 8 H L S-VHS 9 L L
>
>Model Number: CS-35401 Symptom: NO VIDEO Cause #1
>1. NO MAIN VIDEO,THERE IS VIDEO IN PIP ON EXT1 AND EXT2:-CHECK FOR
>1VPP OF LUMINANCE ON PIN 1 OF IC7000, IF MISSING OR LOW CHECK THE
>VALUE OF C7001 (4.7UF 35V), LOCATED ON THE PIP-PCB.THIS CAP MAY LEAK
>ELECTROLYTE ONTO THE BOARD AND OPENED A FEED THROUGH IN THE PATH
>BETWEEN C7001 POSITIVE LEAD AND THE EMITTER OF Q7003 OR CAUSE
>INTERMITTENT COLOR. PT#181P504090. (CHECK ALL 'SMD' ELECTROLYTICS AND
>TRACES ON PIP) 2. NO MAIN OR PIP VIDEO, CHECK C7014, 47 UFD 16V ON THE
>PIP PCB. PART # 181P502060 3. CHECK FOR 7.2V DC ON THE BASE OF
>Q7003,IF LOW OR MISSING.CHECK THE VALUE OF R7002 (150 OHM
>1/10W).LOCATED ON THE PIP-PWB. PT#103P401050
>Search the Mitsubishi Technical Database
>
>Model Number: CS-35401 Symptom: NO VIDEO OR OSD Cause #1
>1. CHECK BLANKING PULSE AT IC201 PIN 1. SHOULD BE 8-10VPP. IF LOW,
>SUSPECT OPEN R585 (1.2 OHM 1.2W). LOCATED ON MAIN PCB AT FBT PIN 5.
>
>Model Number: CS-35401 Symptom: VIDEO GOING IN AND OUT Cause #1
>1. TUNER VIDEO AND SOUND CYCLES BACK AND FORTH FROM CORRECT VIDEO AND
>SOUND TO SNOW. CHECK C713 (4.7UF NP 50V) ON MATRIX-PWB.
>
>Model Number: CS-35401 Symptom: LP MODE INOP W/EXT INPUTS Cause #1
>1. WILL RESUME OPERATION AFTER POWER LOSS ONLY WITH TUNER INPUT.
>REPLACE IC701 WITH NEW VERSION. PT# 274P157060 UPD17008CW-526
>
>Model Number: CS-35401 Symptom: NO PIP VIDEO Cause #1
>1. CHECK C7026, AND C7036 BOTH 4.7 UFD 35 V PART # 181P504090 ON THE
>PIP PCB. 2. SUSPECT SUB-VIDEO SWITCH IC2002 (LA7956) PART #
>272P394010. LOCATED ON PCB-VIDEO. USE FOLLOWING LOGIC CHART TO
>CONFIRM: LOGIC PIN INPUT PIN 2 3 * HIGH = 5V TUNER 4 H H EXT 1 6 L H
>EXT 2 8 H L S-VHS 9 L L
>
>Model Number: CS-35301 Symptom: BLACK PIC. WTH. PIP Cause #1
>1. BLACK PICTURE WITH PIP ACTIVE:-CHECK FOR A LEAKY OR SHORTED Q710.
>LOCATED ON THE CATHODE OF D708 ON THE MAIN-PCB. PT#260P582010
>
>Model Number: CS-35301 Symptom: NO VIDEO NO OSD Cause #1
>1. CHECK BLANKING PULSE AT IC201 PIN 1. SHOULD BE 8-10VPP. IF LOW,
>SUSPECT OPEN R585 (1.2 OHM 1.2W). LOCATED ON MAIN PCB AT FBT PIN 5.
>
>Model Number: CS-35301 Symptom: DELAY WHEN SW TO EXT VID Cause #1
>1. HAPPENS WHEN SWITCHING FROM ANTENNA VIDEO INPUT TO EXT VIDEO INPUT.
>DELAY IS APPROX 8-10 SECONDS. REPLACE C713 ON MATRIX PCB (4.7UF, 50V
>NON-POLARIZED).
>
>Model Number: CS-35301 Symptom: NEGATIVE PIX Cause #1
>1. CHECK FOR LUMINANCE ON PIN 41 OF IC201 IF MISSING OR LOW REPLACE
>DL202 LOCATED ON THE MAIN-PCB. PT#337P113020
>
>Model Number: CS-35301 Symptom: VIDEO GOING IN AND OUT Cause #1
>1. TUNER VIDEO AND SOUND CYCLES BACK AND FORTH FROM CORRECT VIDEO AND
>SOUND TO SNOW. CHECK C713 (4.7UF NP 50V) ON MATRIX-PWB.
>Number: CS-35301 Symptom: BLANK SCREEN ON TUNER INP Cause #1
>1.NO VIDEO ONLY A BLANK SCREEN ON TUNER INPUT,ON EXTERNAL INPUT SCREEN
>GOES WHITE AND SHUTSDOWN.CHECK C511 (.15UF 50V) ON PIN 46 OF IC201.ON
>THE MAIN-PCB.
>
>Model Number: CS-35301 Symptom: NO VIDEO Cause #1
>1. NO MAIN VIDEO,THERE IS VIDEO IN PIP ON EXT1 AND EXT2:-CHECK FOR
>1VPP OF LUMINANCE ON PIN 1 OF IC7000, IF MISSING OR LOW CHECK THE
>VALUE OF C7001 (4.7UF 35V), LOCATED ON THE PIP-PCB.THIS CAP MAY LEAK
>ELECTROLYTE ONTO THE BOARD AND OPENED A FEED THROUGH IN THE PATH
>BETWEEN C7001 POSITIVE LEAD AND THE EMITTER OF Q7003 OR CAUSE
>INTERMITTENT COLOR. 2.NO MAIN OR PIP VIDEO, CHECK C7014, 47 UFD 16V ON
>THE PIP PCB. PART # 181P502060 3. CHECK FOR 7.2V DC ON THE BASE OF
>Q7003,IF LOW OR MISSING.CHECK THE VALUE OF R7002 (150 OHM
>1/10W).LOCATED ON THE PIP-PWB. PT#103P401050
>
>Model Number: CS-35301 Symptom: NO PIP VIDEO Cause #1
>1. CHECK C7026, AND C7036 BOTH 4.7 UFD 35 V PART # 181P504090 ON THE
>PIP PCB. 2. SUSPECT SUB-VIDEO SWITCH IC2002 (LA7956) PART #
>272P394010. LOCATED ON PCB-VIDEO. USE FOLLOWING LOGIC CHART TO
>CONFIRM: LOGIC PIN INPUT PIN 2 3 * HIGH = 5V TUNER 4 H H EXT 1 6 L H
>EXT 2 8 H L S-VHS 9 L L
>
>Model Number: CS-35301 Symptom: BLACK SCREEN AND NO OSD Cause #1
>1. BLACK SCREEN NO OSD AND THE AUDIO IS O.K.AT TURN ON MONITOR PIN 29
>OF IC701 FOR 0 VDC,IF THIS INCREASES.DISCONNECT PIN 29 AND MONITOR THE
>PIN FOR 0V,IF MORE THAN 0V,REPLACE IC701.LOCATED ON THE MAIN-PCB 2.
>CHECK BLANKING PULSE AT IC201 PIN 1. SHOULD BE 8-10VPP. IF LOW,
>SUSPECT OPEN R585 (1.2 OHM 1.2W). LOCATED ON MAIN PCB AT FBT PIN 5.
>
>Phil
>
>Phil Bader, Pres.
>Jan Phyl TV Inc
>Winter Haven, Fl
>(863) 299-8821
>estab. 1976
>
>----- Original Message -----
>From: LeRoy Westlund <llw@xxxxxxxxxx>
>Date: Saturday, July 30, 2005 11:00 am
>Subject: [TechAssist] [Update]  Mitsubishi  CS-35401  Video comes and
>goes - Sound stays.
>
>> The PIP looked bad, with leaking fish caps, so I done the bypass
>> anyway,...but,...it didn't help with my problem.
>> I need to troubleshoot the Video switching ckts., but I don't have a
>> schematic of that area. Can anyone provide me with a pdf. file for
>> the Video
>> switching ckts., or at least tell me which IC , and part number I
>> need to
>> check ?
>>
>> Thanks again,
>> LLW
>>
>> LeRoy Westlund
>> Westlund TV & Electronics
>> 97 North Main                             " I forgot,..to remember,..
>> Centerfield, UT 84622-0087           to forget "
>> Ph./Fax  435-528-3822
>> mailto:LLW@xxxxxxxxxx
>>
>> -----Original Message-----
>> From: Carol Rundle <brundle@xxxxxxxxxxxxx>
>> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
>> Date: Friday, July 29, 2005 3:05 AM
>> Subject: [TechAssist] Re: Mitsubishi CS-35401 Video comes and goes
>> - Sound
>> stays.
>>
>>
>> >Leroy,
>> > Sure sounds like PIP , c7001,4.7@35v. ,also open',corroded,
>> connection at
>> + side of c7001,If not there,
>> > Might try heating , cooling cap's on A/V jack panel, (hair drier).
>> >
>> >  Bill,
>> >   Bill's TV
>> >    Sonora,Calif.
>> >LeRoy Westlund <llw@xxxxxxxxxx> wrote:
>> >This set has a good ,stable picture when using Ant-A or B.
>> >Everytime I select External-1, or External-2, it takes about 45
>> seconds to
>> 2
>> >minutes, before the picture shows up. It just has a black screen
>> with OSD
>> >OK.
>> >
>> >Sometimes the video will go away while watching it for a while.
>> It is
>> >completly unpredictable. Tapping on PIP module, or using freez-
>> spray has no
>> >effect.
>> >It will go bad every time, when I switch inputs from Ant-A or B,
>> and back
>> to
>> >Externals 1 or 2.
>> >
>> >I think the PIP module is OK, cause the problem only shows up on
>> external>inputs.
>> >Should I try a PIP bypass first, anyway ?
>> >
>> >Could it be that the Video switching IC is bad ? If so,...what is
>> the ckt.
>> >designation, and part number ?
>> >Is it located on the Video input jack board ?
>> >
>> >Do any of you have any tips for a problem of this nature ?
>> >
>> >Any help is appreciated,
>> >LLW
>> >
>> >LeRoy Westlund
>> >Westlund TV & Electronics
>> >97 North Main " I forgot,..to remember,..
>> >Centerfield, UT 84622-0087 to forget "
>> >Ph./Fax 435-528-3822
>> >mailto:LLW@xxxxxxxxxx
>> >
>> >
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>> >Carol Rundle
>> >brundle@xxxxxxxxxxxxx
>> >
>> >
>> >
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