View previous topic :: View next topic |
Author |
Message |
mloo55
Joined: 06 Mar 2005 Posts: 16
|
Posted: Sat Mar 01, 2008 3:48 am Post subject: sony kv 27EXR25 ANU-2 chassis no raster |
|
|
In short the filaments are on, HV 25kv approxx, audio ok, power supply voltages normal. I moved the screen pot an the raster is visible. I took volatges at IC301 and some values are abnormal like these:
16 5.30 (3.9) 17 5.3 (3. 18 5.35 (3.9) 19 4.29 (5.5)
20 0.26 (2.3) 21 4.8 (6.0) 22 0.26 (1.9) 23 4.33 (6.2)
24 0.26 (1.9) 26 7.0 (4.7) 27 0.20 (7.7) 38 1.8 (2.7)
44 1.90 (2.4) 45 1.7 (2.2)
Readings in parenthesis are from schematic. Is the IK protection the reason these readings change if so what action could I do/
rgds
mloo55 _________________ I am an electronic and aviation technician, working for about 25 years in this branch besides i like reading,computing,movies. |
|
Back to top |
|
|
minnie
Joined: 18 Aug 2005 Posts: 2880 Location: Hell
|
Posted: Sun Mar 02, 2008 7:04 pm Post subject: |
|
|
Check R702 on the crt board. |
|
Back to top |
|
|
mloo55
Joined: 06 Mar 2005 Posts: 16
|
Posted: Sun Mar 02, 2008 8:33 pm Post subject: |
|
|
Minnie
I checked r702 and it is ok. another acrion?
rgds
mloo55 _________________ I am an electronic and aviation technician, working for about 25 years in this branch besides i like reading,computing,movies. |
|
Back to top |
|
|
minnie
Joined: 18 Aug 2005 Posts: 2880 Location: Hell
|
Posted: Sun Mar 02, 2008 10:05 pm Post subject: |
|
|
Resolder C32 connector on the crt board. 25kv sounds low. When you turn up the screen do you have vertical deflection? |
|
Back to top |
|
|
Guest
|
Posted: Mon Mar 03, 2008 1:35 am Post subject: |
|
|
Exactly when I move g2 I can see the raster but with the cushion effect.
It fills all the screen.
rgds
mloo55 |
|
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 :
TA8637BP Toshiba • MZ-NE410 Sony • 31GT720 RCA • Allocchio Bacchini 521 531 534 ALLOCCHIO • 832B EMERSON • smg2301p Secos • bf996s 1 Philips • CCE+DVD-2940D CCE • 09 PCB Diagram Samsung • 2sc5993 Inchange Semiconductor •
|