[TechAssist] Re: Mits CS2656R Help
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 6 Aug 2003 14:37:15 -0400
Bob,
Check the following from WINSTIPS:
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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MITSUBISHI CS2656R
## Brown Glue Service Note ###
Jeff Stielau : 7/5/01 : Shoreline Electronics
Remove Brown Glue Next To Ic771 & Metal Shielding Case. Also Remove Glue
From Dic Cap Located Under Rf Shield On Trace Side Of Pc Board. Causes A No
Video Symptom
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MITSUBISHI CS2656R
Intermittant Operation
John Kincaid Sos Tv
Bad Connections On 5 Pin Regulator Ic
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MITSUBISHI CS2656R
Intermittantly Breathes Goes To Smaller Picture On All 4 Sides
John Kincaid Sos Tv
Bad Connections On 5 Pin Regulator Ic
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MITSUBISHI CS2656R
No Video - Only A Blank White Screen With Retrace - Audio Ok
Blue Ribbon Tv & Computers
Repair Broken Grounds Under Chassis In Middle. From Top Shield Poking
Through.
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MITSUBISHI CS2656R
No Video Or Snow : Osd & Audio Ok
Jeff Stielau : 7/5/01 : Shoreline Electronics
Remove Brown Glue Next To Ic771 & Metal Shielding Case. Also Remove Glue
From Dic Cap Located Under Rf Shield On Trace Side Of Pc Board.
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MITSUBISHI CS2656R
Tuning Intermittant
Paul Deese Cet
Replaced R773 2.7k1/2w And Remove Glue On Top Of Board
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MITSUBISHI CS2656R
Vert Sweep Inop, No Audio.
Cap'S Tv
Open Trace Between D561 & C561 (2200uf). 12-Volt Scan Derived Voltage
Originating Off Pin 4, Flyback.
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MITSUBISHI CS2656R
Video Bright Screen & Retrace
From Mitsubishi
Missing 200 Volts To Crt Cut Off Transistors. Check For Open D552 And R560.
Pcb-Main. Part Numbers: D552 - 264p231010
R560 - 103p338010
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MITSUBISHI CS2656R
Video Int. Or No Tuner Video
From Mitsubishi
Check For Leaky Or Shorted C110 (.47uf 35v) At Pin 10 Of Ic201. (Pcb-Main)
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MITSUBISHI CS2656R
Video No Sync
From Mitsubishi
Check Video Level At Pin 32 Of Ic201 For 1vpp. If Low Check For Shorted
Dl202 Located At Base Of Q204. (Pcb-Main) Dl202 Pt.# 337p110020
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MITSUBISHI CS2656R
Video No Video
From Mitsubishi
Tuner Video Present Into Ic2a0 Pin 4 But No Output Pin 1. Dc Level At Pin 4
May Be High, It Should Be 3.5v. Remove All Circuit Glue On Foil Side Of
The Main Pcb Between Ic771 And Ic2a0 And On The Compo
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MITSUBISHI CS2656R
Video No Video From Ic2a0
Technos
Found Glue Under C772 , Ic 2a0 Was Ok
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MITSUBISHI CS2656R
Video No Video Or Audio
Arundel Tv
C3a0 - 2200uf@35v Next To Tuner
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MITSUBISHI CS2656R
Video Snowy Picture
From Mitsubishi
Check The Value Of R773 (2.7k) At Pin 1 Of Ic771.
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MITSUBISHI CS2656R
Video Video Streaking
From Mitsubishi
All Voltages At Q203 Check Good. Q203 Checks Good Out Of Circuit. Breaking
Down Under Load. Replace It. Located On Pcb-Main At Ic201 Pin 32. Pt #
260p25601
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MITSUBISHI CS2656R
Video Dark Screen, Audio Ok Can Hear Arcing.
Gateway Electronics Inc. Frank D'Alio
Bad Solder Connection On Dx Connector On Pinchusion Board Located To The
Right Of The Main Board.
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MITSUBISHI CS2656R
Video Inop, No Raster. Sound Good On All Channels
Robinson Electronics
Looked Like Bad Tuner: C773 470/50 Off Ic771-8
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MITSUBISHI CS2656R
Video Intermittent
Sam Oyler
Lift C772, remove glue from board
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MITSUBISHI CS2656R
Video No Go. No Raster (Black). Sound Ok.
Robinson Electronics
Replace Resistor R773 - 2700 Ohms (Under Cap. C773). "Remove Dark Glue
Around Cap / Resistor Area". May Need To Replace C773 - 470 Ohms 50v.
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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: "Bob@Bobs tv" <woodman1@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, August 06, 2003 2:19 PM
Subject: [TechAssist] Mits CS2656R Help
> When this set was left, customer said set picture would scramble and go
dead in an hour or 2 days.. We hooked up and set worked fine for like 2
hours.. Then, we lost sound and screen went dark... turning up screen we
found we had no vertical sweep.. We replaced scan diode {checked ok} 26v
supply thought it feeds vert/audio. We did have B+ on audio chip and vert
output chip when set was not working.. Today went to work on this set, has
sound, grey screen and scrambled out of sync pix.. removing bottom shield
found found glue had damaged trace near jungle chip, repaired and the same,
scrambled pix. Probably another supply voltage missing..But without a print
its very hard to trace and there is no sams listed..Hope someone has some
ideas..
> Thanks...
>
> Bob,
>
> Bobs TV Worcester, ma
>
> woodman1@xxxxxxxx
>
> Main 508-853-1482
> Fax 508-853-1480
>
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