[TechAssist] Re: Philips 60P8341( PTV915) no video
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 14 Oct 2004 21:03:13 -0400
Willie,
You make no confirmation of audio...
From Tech Repair CD:
Philips\50P8341A PTV915\Intermittent Blinking of Video with High Contrast or
Bright Scenes\Possible damage
to diodes in AKB Circuit\\PTV915\Replace Diode 6003 with part number 9340 553
52115 and Resistor 3669 with
part number 4822 117 11503.\When Replacing the above parts also replace Diode
6012 and Diode 6025 with
part number 9340 553 52115\\\\\\\
Philips\PTV910\No Picture* No Sound* High Voltage Okay\\\PTV910\Replace Diode
6003 with part number 9340
553 52115 and Resistor 3669 with part number 4822 117 11503\When Replacing the
above parts also replace
Diode 6012 and Diode 6025 with part number 9340 553 52115\NOTE: There have been
2 version of this board.
To find which version you have look at the top of the board for 3135 013
3203.9.\These parts will be
found on board revision .9 only and does not apply to any other versions. They
are located at D-4 on the
bottom of the board close to plug 1083. .\Diode 6003 is labeled however
Resistor 3669 is not* it is
located next to pin 10 of plug 1083 and is the first part between pin 10 and
the edge of the board\\\\
Philips\PTV914* PTV915* PTV916* PTV918\A repair kit has been established which
contains some of the most
common items associated with failure of the Large Signal Board.\The kit will
have its own unique part
number and contain the items listed below.\Kit Part #:
483531057525\PTV914* PTV915* PTV916*
PTV918\312226832861 5900 1 High Voltage
Generator\212010690586 3906
1 Resistor\935201880112 7550 1 IC
Vertical
Deflection\933535450127 ( 7801) Transistor*934055093127 (7802)
Transistor\483525397162 (1800)
Fuse*483525397162 (1801) Fuse\\\\
Magnavox\PTV916\akb circuit is shutting down picture (and audio) in order to
protect Crt'S\When akb is
turned off the picture (such as it is) and audio is restored so technician can
see the image and diagnose
area of fault\\PTV916\Common problem is the focus/G2 block. If the G2 is not
perfect the akb will
activate. G2 voltage for this model should be set to 235V measured to cold
ground\To disable akb
circuit:1. If remote control has a status button and cursor ring* enter the SAM
by Entering 06-25-96
Status. Press cursor down twice* then cursor right once\2. If the remote
control does not have a status
button or cursor ring* enter the SDM by entering 06-25-96-Menu. Then on the
front of the set* press
and\hold the Volume Up and Volume Down buttons together for 4 seconds to enter
the SAM. Press cursor down
twice* then cursor right once\3. Unplug connector 1083 on the SSM until the
CRT's begin to light* then
plug back in. (This procedure does not actually shut off the AKB* but it fools
the signal process\4.
Using the ComPair service tool* you can turn off the AKB in the menu\5. Power
the set on. Wait about 20
seconds. Using a 9V battery* connect the negative side to ground* connect the
positive side through a 1K
ohm resistor and\\
Jeff
--
Intrepid Video TV/VCR Repair
263 S Front St, Steelton PA 17113
717-939-7708; (F) 717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "Willie Hunter" <williehunter2@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, October 14, 2004 5:29 PM
Subject: [TechAssist] Philips 60P8341( PTV915) no video
Hi Group, I have a Philips model # 60P8341 (PTV915) comes on with high voltage
but no picture. turning up screens shows retraced. would the SSB cause this?
if anyone have a tip or schematic please share it with me.I would like to get
a schematic if possible.
Willie.
Hunter TV
Detroit,Mich.
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