[TV] Re: (no subject) zenith PV4655

[Dale Kemp <jdkemp2003@xxxxxxxxx>]

Here is some info I found at repairworld.com that may help.
Just for fun, please include a subject line in your emails.
Thanks and good luck,
Dale Kemp
TELEVISION  zenith  PV4655 LKD  CONVERGENCE  ELECTROLYTIC caps blue and black ones dried or leaky used LC102 TO CHECK THEM conv/board is located under neath the speaker gril it has the adjustments on the board  
TELEVISION  zenith  PV4655 lk9  convergence  replase all blue capacitor on convergence board located on front of tv under neath speaker grill it has the adjustments on the board little blue caps electrolytics.  
TELEVISION  ZENITH PTV WITH 9-700  PV4655LK9  NO PIX/HORIZ LINE WHEN RAISE G2S  UNPLUG PIP4,(BUS LINE,),(BYPASS PIP (PIP2,PIP2A)  
TELEVISION  ZENITH  PV4655LK9  INTERMIT. RED OVERDRIVE, PIC BLOOMS WHEN COLD  REPLACE HV SCREEN/FOCUS ASSY, LISTED AS BLEEDER ASSY  
TELEVISION  ZENITH  PV4655LK9  DEAD  REPLACE Q3405 NTE2310 ON 9-628-09 MODULE  

 

Projector Zenith PV4655LK9 has small picture. According the tip, the output
voltage from switch mode power supply is lower than normal. But I don't have
service manual. Can anybody tell the normal voltages accross cap CX3516,CX3517?
Thank you!  
       
 
 
gzeng398 Posted: May 16 2001, 05:04 PM  
 


Guangyao Zeng


Group: Members
Posts: 58
Member No.: 6494
Joined: 5-February 01

 

 Re: Projector Zenith PV4655LK9 -- Small picture'

'"Gavin" wrote:
>
>Projector Zenith PV4655LK9 has small picture. According the tip, the output
>voltage from switch mode power supply is lower than normal. But I don't
have
>service manual. Can anybody tell the normal voltages accross cap CX3516,CX3517?
>Thank you!
Voltage accross CX3516 and CX3517 is 129V. Is it normal?  
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khadra68 Posted: Mar 10 2004, 04:48 PM  
 


Kinda Electronics


Group: Members
Posts: 125
Member No.: 8700
Joined: 27-June 03

 

 I'm working on a Zenith model PV4655BG9 with the 9-700 digital board. The set came on with no pic and no sound. Turning up the G2s revealed vertical collapse. Replacing vert. out and capacitors has no effect and the output has 24 and 12v supplies. could the problem be with the 9-700 and if so, any guesses as to what it might be? any help is greatly appreciated.

thanks, 

jason 

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jfitz768 Posted: Mar 11 2004, 12:05 AM  
 


James Fitzsimmons


Group: Members
Posts: 332
Member No.: 8357
Joined: 12-March 03

 

 Is this a total flat line or very small vertical deflection?I had some back in the day that had corrupted vertical parameters in the eprom.Some only had 3 inches of vertical deflection which I could only see by turning up the screen control.Punched in numbers directly from service data for vertical height and increased until it came up.If you have a total flatline I would check to see if you have a ramp waveform on the connector feeding drive from the 9-700 to the deflection board and try the vertical parameter.Don't remember what parameter no. was for vert height but service mode access is hold down menu until menu disappears(Since you can't see it at least 30 seconds)9-8-7-6-enter.You will need the parameter no. which I can look up if no one else finds it since you can't see the menu(raster is totally blanked until you get sufficient deflection).Never had too many problems with the 9-700 itself just bad connections at the regulator transistors on the side and an occasional bad
 tuner.Only chip that I had to replace on them was one of the sound ics,never the deflection ic on it.The 9-700 only comes with the soldered on ics.Doesn't come with any of the plug ins.  
       
 
 
25495627 Posted: Mar 11 2004, 12:23 AM  
 


John Rudasill


Group: Members
Posts: 209
Member No.: 4037
Joined: 10-August 98

 

 On the 700 board - IC2701 is the DPU deflection processor unit. Vert driver comes from junction of R2707 and R2708 (from pins 26 and 27), goes thru C2103 into base of Q2100, out emitter via L2101 to connector 4K3 pin1, and over to deflection board. IC2701 is Zenith number 221-563, in stock at $14.52 dealer. 

--------------------
John Rudasill Electronics Service
Servicing Central PA for 38 Years 
       
 
 
khadra68 Posted: Mar 16 2004, 03:56 PM  
 


Kinda Electronics


Group: Members
Posts: 125
Member No.: 8700
Joined: 27-June 03

 

 thanks for the tips.. so far i have been unabale to utilize the service menu. the set has about 3-4" of vertical deflection for about 10 seconds before it slowly goes to flat line. i don't have a manual for service parameters so if anyone knows which one is vertical height, it would be very helpful. thanks

jason 

      
 
 
gyarn662 Posted: Mar 16 2004, 05:37 PM  
 


Greg Yarnall


Group: Members
Posts: 1074
Member No.: 561
Joined: 25-February 02

 

 with remote hit menu untill it disappears- then 9-8-7-6 enter
you should then be in service menu 5 is vertical height,
so hit 5-enter then 179 enter should get you in the ballpark
good luck
greg 

 

		
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