[TechAssist] Re: Zenith PVY5265RK PTV 9-1690 Convergence Board
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 17 Sep 2004 08:44:13 -0400
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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ZENITH 9-1690
1 Ohm Resistors Smoke On Convergence Module
The 5a Pigtail Fuses On The Main Ps/Sweep Board May Be Open...Check Them.
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ZENITH 9-1690
Convergence Bad
R3243 110k & R3244 82k 1/2w Open On Smps 9-1674-01
On The 9-1690 Convergence Board You May Have To Replace One Or Both Of The
Convergence Ic'S, Depending On What Resistors Are Burnt. Sometimes You Can
Just Replace The Resistors If Your Lucky.
Ic4008 & Ic4009 Stk392-110 Convergence Amp.
R4161, 62,63 & R1460 1ohm Resistor (Red & Blue)
Replace Resistors In 9-1303-06 & -05 120k 1/2w Resistor
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ZENITH 9-1690
Convergence Bad / Green
Phil Hull
One Ohm Resistors Ok -26v, 26v, 16v, To Convergence Board Ok.
Found A Defective Ic 4009 Part# 223-51 On Convergence Board Stk392-110
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ZENITH 9-1690
Convergence Bad, Then No Video With Lines Dipping From Top.
Tv Traders, Inc.
Replaced Convergence Module But Still No Video. Replace Open R3243, 110k
Resistor On Power Supply. Also Check R3244,82k Per Zenith Tech.
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ZENITH 9-1690
Convergence Gone - Blows Stks
Dick'S Tv - Sharon, Pa
Ic4001, 2, Or 3 Can Cause Repeat Failure Of The Output Ics. Before Replacing
Stks, & After Replacing The 1 Ohm Resistors, Check For Dc Volts On Pins 6,
14, & 15 Of The Stk. If Any, There'S A Bad Driver Ic.
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ZENITH 9-1690
Convergence Porblems Will Not Adjust From User Menu
Jeff Stielau : 6/1/00 : Shoreline Electronics
Change Both Stk392-110 & The Four 1 Ohm Resistors. Resolder The 5v Regulator
Ic'S On The Same Heatsink. The 5a Pigtail Fuses On The Main Ps/Sweep Board
May Be Open...Check Them.
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ZENITH 9-1690
Convergence Very Bad, Won'T Adjust.
Ford'S Tv & Video Service
Open Resistors, R4160, R4161 (1 Ohm 1/2w) And Defective Convergence Ic4008
(Stk392-110). Also Check For Shorted Diode On 26 V Line, Cr3419
(103-360-02), & Open Fuse, Fx3460 On 9-1674 (Sweep)
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ZENITH 9-1690
Convergence Very Bad, Won'T Adjust.
Ford'S Tv & Video Service
Open Resistors, R4162, R4163 (1 Ohm 1/2w) And Defective Convergence Ic4009
(Stk392-110). Also Check For Shorted Diode On 26 V Line, Cr3419
(103-360-02), & Open Fuse, Fx3460 On 9-1674 (Sweep)
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ZENITH 9-1690
Convergence Way Off - Picture Bowed Top And Bottom.
Garris Tv - New Bern, Nc.
Look For Open R3243 110k Resistor Under The Large Blue 5w Power Resistor In
Front Of The Hot. (Hard To Locate) Very Commonly Fail, Believe Zenith May
Have Gotten A Bad Batch Of 110k Resistors When These Sets Were Built. Other
Shops Have Seen This Same Resistor Go "Thermally" Bad Also Confirming This
Common Complaint!
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ZENITH 9-1690
Module Compatibility
Adams Tv
Zenith Supplies 9-1690r, There Are Different Versions Of These Modules With
Cables Soldered In Or With Plug In Sockets, If Prob, Switch The Cables With
The Original Board.
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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@xxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Damon" <damon101@xxxxxxxxxxxxxx>
To: "TechAssist" <techassist@xxxxxxxxxxxxx>
Sent: Friday, September 17, 2004 8:19 AM
Subject: [TechAssist] Zenith PVY5265RK PTV 9-1690 Convergence Board
> Hello,
>
> I've been workin on getting the convergence circuits to operate, the cross
> hairs don't move, I can access the convergence alignments, but changing
> their values don't do anything.....both the 9-1690 and the 9-1674 have
been
> sent to the rebuilders....but still no convergence, so only 1 more thing
to
> check, and that's the digital data lines on connector 83C.....that's why I
> need you folks to help. ANYBODY PRESENTLY WORKING ON A ZENITH PTV WITH A
> 9-1690 CONVERGENCE MODULE, would you please verify with a scope what you
> see, please????
>
> This is what I see:
>
> 83C pin 1 (black wire) 5Volts with a very tiny negative-going pulse
(about
> 0.2v max)
> pin2 Data, good 5v pp
> pin3 5V
> pin4 Data (or clock) good 5v pp
>
> I think pin 1 is not right, but I can't verify since Zenith techs are on
> Hurricane leave, any help would be deeply appreciated.
>
> Thanks
> Damon Brunger
> Telrad Electronic Services
> Ft Wayne, IN 46815
>
>
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