View previous topic :: View next topic |
Author |
Message |
Guest
|
Posted: Mon Jun 01, 2009 7:00 am Post subject: |
|
|
jts1957 wrote: | jts1957 wrote: | Pin 1 (V. Reg.) wants 6.8 volt - Pin 15 (VCC) wants 9 volts. |
Did you ever get around to measuring these on the CXA1446S? |
sorry sir ,I decided to replaced the IC without measururing the old
one bec. i rely only the functionality of the IC based on the ckt diagram which i thought also that it is the only way the video and sound may caused the problem when it is defective. |
|
Back to top |
|
|
jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
|
Posted: Mon Jun 01, 2009 7:30 am Post subject: |
|
|
I'm confused. "Symptoms" with "original" IC before, and now with "replacement" IC, are they the same or different?
BEFORE: ?
leafer wrote: | my tv have raster but no picture connected to cable/antenna, tried to play dvd player connecting it to video input but still no pic. |
leafer wrote: | no audio ,only the raster sound heard. |
NOW: ?Sound is "normal" / Pix is as described?:
leafer wrote: | the unit have the sound output but the pic is not good, the pic has black vertical line like partition in the middle, the image is not in centered position ,image is devided into two portions in slant S position,the half from left portion went to right and the right image went to left. |
No I don't think CRT involved.
Your last description of picture reminds me of the Gated Sync Descramblers for over-the-air and cable channels of years ago. |
|
Back to top |
|
|
Guest
|
Posted: Mon Jun 01, 2009 8:06 am Post subject: |
|
|
jts1957 wrote: | I'm confused. "Symptoms" with "original" IC before, and now with "replacement" IC, are they the same or different?
BEFORE: ?
leafer wrote: | my tv have raster but no picture connected to cable/antenna, tried to play dvd player connecting it to video input but still no pic. |
leafer wrote: | no audio ,only the raster sound heard. |
NOW: ?Sound is "normal" / Pix is as described?:
leafer wrote: | the unit have the sound output but the pic is not good, the pic has black vertical line like partition in the middle, the image is not in centered position ,image is devided into two portions in slant S position,the half from left portion went to right and the right image went to left. |
No I don't think CRT involved.
Your last description of picture reminds me of the Gated Sync Descramblers for over-the-air and cable channels of years ago. |
Now: ?quote.. it is the outcome after i replaced the IC with the same parts number. its different now . |
|
Back to top |
|
|
jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
|
Posted: Mon Jun 01, 2009 8:24 am Post subject: |
|
|
Check any electrolytic capacitors connected on pins 4 to 7. Also: any AGC pots? Do they behave correctly?
How does DVD player connected to video input work now? |
|
Back to top |
|
|
leafar
Joined: 15 Mar 2007 Posts: 42
|
Posted: Mon Jun 01, 2009 8:36 am Post subject: |
|
|
Anonymous wrote: | jts1957 wrote: | I'm confused. "Symptoms" with "original" IC before, and now with "replacement" IC, are they the same or different?
BEFORE: ?
leafer wrote: | my tv have raster but no picture connected to cable/antenna, tried to play dvd player connecting it to video input but still no pic. |
leafer wrote: | no audio ,only the raster sound heard. |
NOW: ?Sound is "normal" / Pix is as described?:
leafer wrote: | the unit have the sound output but the pic is not good, the pic has black vertical line like partition in the middle, the image is not in centered position ,image is devided into two portions in slant S position,the half from left portion went to right and the right image went to left. |
No I don't think CRT involved.
Your last description of picture reminds me of the Gated Sync Descramblers for over-the-air and cable channels of years ago. |
Now: ?quote.. it is the outcome after i replaced the IC with the same parts number. its different now . |
BEFORE: 1. could not see pic or heard sound from program to any tuned on air channel/cable. with raster sound heard only.
2. no pic using dvd player to video input
NOW :1. have bad picture and good sound from program to any tuned on air channel/cable
2. still no pic using dvd player to video input |
|
Back to top |
|
|
leafar
Joined: 15 Mar 2007 Posts: 42
|
Posted: Mon Jun 01, 2009 8:51 am Post subject: |
|
|
jts1957 wrote: | Check any electrolytic capacitors connected on pins 4 to 7. Also: any AGC pots? Do they behave correctly?
How does DVD player connected to video input work now? |
Still no pic when i connected my dvd player to video input, black pic only the video text seen and thin magnetic lines.
ok sir ill check first the capacitors.
thank you again for your time .
godbless. |
|
Back to top |
|
|
leafar
Joined: 15 Mar 2007 Posts: 42
|
Posted: Mon Jun 08, 2009 12:22 am Post subject: |
|
|
jts1957 wrote: | Check any electrolytic capacitors connected on pins 4 to 7. Also: any AGC pots? Do they behave correctly?
How does DVD player connected to video input work now? |
replaced all capacitors near the IC ,pic and sound works fine from dvd player & to any tuned air channel,cable channel. the only problem right now is the tuning, the selected channel is in stucked mode could not transfer to selected channel only the text channel moved.channel moved when pressing hard the cable connector connected to the tuner..it is possible sir that the tuner is defective already? |
|
Back to top |
|
|
jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
|
Posted: Mon Jun 08, 2009 1:00 am Post subject: |
|
|
What is "stucked mode?"
What is "text channel?"
1) You should be able to press in the channel digits, then "enter" on the remote to change to ANY station. (In memory or not.)
2) If you're pressing channel up, channel up, channel up, and the TV is staying on the present channel, see if there's an "add" and "erase" button on the apron.
If so, do step #1, hitting "add" after you "enter" whatever stations you want in the sets "memory." |
|
Back to top |
|
|
Guest
|
Posted: Tue Jun 09, 2009 12:45 am Post subject: |
|
|
jts1957 wrote: | What is "stucked mode?"
What is "text channel?"
1) You should be able to press in the channel digits, then "enter" on the remote to change to ANY station. (In memory or not.)
2) If you're pressing channel up, channel up, channel up, and the TV is staying on the present channel, see if there's an "add" and "erase" button on the apron.
If so, do step #1, hitting "add" after you "enter" whatever stations you want in the sets "memory." |
answer# 1 ..not in memory
answer# 2....pressing channel up.....not moving ,stayed on the present channel . used the auto channel button on the remote ,the channel digits moving forward but no tuned channel in memory. |
|
Back to top |
|
|
leafar
Joined: 15 Mar 2007 Posts: 42
|
Posted: Tue Jun 09, 2009 12:47 am Post subject: |
|
|
Anonymous wrote: | jts1957 wrote: | What is "stucked mode?"
What is "text channel?"
1) You should be able to press in the channel digits, then "enter" on the remote to change to ANY station. (In memory or not.)
2) If you're pressing channel up, channel up, channel up, and the TV is staying on the present channel, see if there's an "add" and "erase" button on the apron.
If so, do step #1, hitting "add" after you "enter" whatever stations you want in the sets "memory." |
answer# 1 ..not in memory
answer# 2....pressing channel up.....not moving ,stayed on the present channel . used the auto channel button on the remote ,the channel digits moving forward but no tuned channel in memory. |
answer# 1 ..not in memory
answer# 2....pressing channel up.....not moving ,stayed on the present channel . used the auto channel button on the remote ,the channel digits moving forward but no tuned channel in memory. |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
DiamondMax 22 SATA II maxtor • toshiba d-vr7kc sm TOSHIBA • 2MD-001 Kyocera • LeXfiles SXFun6in1v1.2 Aug2004 Philips • AVR3801 Denon • R3265A R3271A Spectrum Analyzer Vol II S • AXIAL TAPING, Cut Lead & Lead Forming an • pdtc144e series Philips • General EP4000 096 Minolta • LC7.2E LA LCD TV.part06 Philips •
|