[TechAssist] Re: Mitsubishi VS-40VA2 pro-jo had intermit. vert,now no pix
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 31 Jul 2003 22:38:21 -0400
Philip,
From Mitsu site:
VS-40VA2
Symptom: NO VIDEO OR OSD
Cause #1
1. CHECK FOR 1200 VDC AT PIN 1 OF CONNECTOR "DK". IF LOW OR MISSING CHECK
R5D9 100 OHM 1/2 OFF PIN 1
OF THE FLYBACK ON THE MAIN PCB. 2. CHECK IC401 PIN 8 FOR 28 VDC IF MISSING
CHECK R510 1.2 OHM 1/2 W OFF
PIN 5 OF THE FLYBACK. IF OPEN IC401 PART # 272P239050 MAY BE SHORTED. BOTH ARE
ON THE MAIN PCB. 3. CHECK
FOR SHORTED OR LEAKY Q2H0, IF BAD APPLY FOLLOWING CIRCUIT CHANGE TO CORRECT. ON
FOIL SIDE OF PCB-SIGNAL,
SOLDER A 1S2471 DIODE CATHODE TO BASE OF Q2H0 AND ANODE TO EMITTER. LOCATED ON
PCB-SIGNAL AT IC201 PIN 2.
PT # 264P045040 AND REPLACE Q2H0 PART # 260P559030. 4. CHECK C2H1 100 UFD 35 V
C2H2 1 UFD 50 V AND C2H3 47
UFD 35 V OFF OF Q2H1 IN THE SPOT KILLER CIRCUIT ON THE SIGNAL PCB.
VS-40VA2
Symptom: NO VID; Q2H0 OPEN
Cause #1
1. OVER CURRENT CONDITION FAILURE. APPLY FOLLOWING CIRCUIT CHANGE TO
CORRECT. ON FOIL SIDE OF
PCB-SIGNAL, SOLDER A 1S2471 DIODE CATHODE TO BASE OF Q2H0 AND ANODE TO EMITTER.
LOCATED ON PCB-SIGNAL AT
IC201 PIN 2. PT # 264P045040
VS-40VA2
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
VS-40VA2
Symptom: NO VERT DEFLECTION
Cause #1
1. CHECK FOR OPEN R510 (1.2 OHM 1/2 W) OFF PIN 5 OF T501, ON THE MAIN PCB.
Good luck.
Jeff Dougherty
Intrepid Video TV/VCR
263 S Front St
Steelton PA 17113
fax...717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, July 31, 2003 3:06 PM
Subject: [TechAssist] Mitsubishi VS-40VA2 pro-jo had intermit. vert,now no pix
Originally customer complained about taking several minutes for the
picture to stablise vertically from a narrow picture.When I got it, I
have no picture.Looking down the three CRTs show no illumination at all.
I am assuming the vertical deflection failure has blanked out the video
at this point.Comments on this?
And does this model have a vertical "KIT"?
Phil Bader
--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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