Board Selection By Defect; Defects - Sony KZ-32TS1U Training Manual

Table 3-1 shows the boards that could cause the symptoms listed. The most likely board is designated #1,
second likely #2, etc. Two #1 means both boards have an equal probability. To resolve the conflict, testing is
performed in the Standby/Power ON, Fan Drive, Video Flow circuit descriptions (Chapters 10-12) or the Plasma
Panel picture defects (Chapter 4).
For isolation purposes, the TU (tuner board) may be unplugged and the TV will work, displaying video inputs.
Table 3-1 - Plasma TV model KZ-32TS1U / KZ42TS1U Board Selection by Defect
Symptom
Audio Problem – all inputs
Audio Problem – TV channels (deselect SAP)
Dark Screen – sound OK
Dark Picture – sound OK (deselect Power Save
on the remote)
Dead Set - No relay click at plug in
Dead Set – Stby light OFF. No response to
front panel pwr button.
heard.
Dead Set – Except for Stby light ON.
response to pwr button.
heard.
Fan not cooling (front panel Standby indicator
blinking.) See the TV menu and Fan block
diagram in Section 7. Fan NG = No voltage to
fan. Temp NG = Fan not working.
Noise Bars across the screen (horizontal)
Standby Indicator blinking 2 times
Standby Indicator blinking 3 times
Standby Indicator blinking 4, 5 or 6 times
Video Distortion – With composite and S video
input only.
Video Distortion – With component (Y, R-Y, B-
Y) input only.
Video Distortion – With both composite and
component inputs.
"picture inversion" to "clean" the screen first.
Symptom
*After B board replacement, adjustments for brightness and color balance are necessary. See Adjustments.
**The entire power supply board is listed in the service manual as "Switching Regulator". The 32" and 42"
TV sets do not use the same Switching Regulator power supply and therefore have different part numbers.
***See Possible Plasma Panel defects for illustrations.
Chapter 3 - Board Selection by Defect
Plug-in relay click
Plug-in relay click
Try using the menu's
Probable Circuit Board Failure
B* H1
1
1
2
3 2
2
No
3
The rear metal shield must contact the conductive mesh
on all four sides and be screwed to the center TV board
assembly.
3
2
2
2
1
B * H1
4

3. Board Selection by Defect

Power Q
Supply**
2 1
2
2
1
1 4
1
2 1
2
(2 = fan) 1
1
1
1
2
Power Q
Supply
TU Plasma
Panel
***
1
1
1
3
3
1
3
TU Plasma
Panel
**