[TechAssist] Re: Sony KV20M42 Dead
- From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 02 Jan 2003 22:13:58 +0000
Removing pin 27 doesn't help and lifting pin 8 of IC002 removes voltage from
board but on chip stays at 2.6v out 7.x V in
Peter
Tucson Radio
From: "D Panday" <dpanday@xxxxxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Sony KV20M42 Dead
Date: Thu, 02 Jan 2003 16:21:54 -0500
Peter,
Ic002 pins are:
PINS. VOLTAGE.
1 7.5V
2 N/C
3
4 N/C
5 GND
6 RESET
7 N/C
8 5V STBY 5.
IC001 CPU pin 27 is VCC +5v, try unsolder that pin.
I had a few occasion that IC002 failures'.
Good Luck.
Panday
>From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
>Reply-To: techassist@xxxxxxxxxxxxx
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Sony KV20M42 Dead
>Date: Thu, 02 Jan 2003 20:05:01 +0000
>
>
>Sony KV20M42
>Chassis BA-4D
>Sams 4268
>
>Dead set low standby 5V only 2.6V supply of 7.8 V ok subbing in fixed reg
>5v
>doesn't help (reset ?)
>pull output pin of standyby reg IC002 it is still 2.6V
>I suspect that IC002 is bad and/ or a bad cpu was going to try the IC
>I don't have the schematic if someone has an electronic copy let me know
>it is a surfacemount JRC part with R05B on it. After a little research I
>suspect from those markings it is NJM78LR05BM, the data sheet apears
>consistant from what circut I can disern. A 8 pin 5 volt surfacemount
>regulator with reset. sony # ? the generic is proving a little dificult to
>find. Has anyone come accros this failure?
>
>Peter Oliver
>Tucson Radio TV
>
>
>
>
>
>_________________________________________________________________
>MSN 8: advanced junk mail protection and 2 months FREE*.
>http://join.msn.com/?page=features/junkmail
>
>------------------------------------------
>Submit A Repair Tip For Everyone Here:
>http://www.tech-assist.org/secure/tip/main.html
>------------------------------------------
>To REMOVE your email address, click here:
> http://www.tech-assist.org/unsubb.html
>To CHANGE your email address, click here:
> http://www.techassist.net/forms/change.html
_________________________________________________________________
MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*
http://join.msn.com/?page=features/virus
------------------------------------------
Submit A Repair Tip For Everyone Here:
http://www.tech-assist.org/secure/tip/main.html
------------------------------------------
To REMOVE your email address, click here:
http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
http://www.techassist.net/forms/change.html
_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE*
http://join.msn.com/?page=features/virus
------------------------------------------
Submit A Repair Tip For Everyone Here:
http://www.tech-assist.org/secure/tip/main.html
------------------------------------------
To REMOVE your email address, click here:
http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
http://www.techassist.net/forms/change.html
Other related posts:
