Last Update
9/26/2002 Event ID
E18048974 Model
KDP57XBR2, KDP65XBR2, KP51HW40, KP51WS500, KP57HW40, KP57WS500
Subject
Picture flickers at dark scene, also changes in hue can occur Symptom: 1. Picture changes hue yellow or greenish 2. Picture flickers symptom at dark scene
SYMPTOMS
1. Background brightness may have a subtle flickering in the picture
2. Picture has large shift of hue due to low output of one of the CRT'S (cannot be corrected by hue control in menu)
CAUSE
Flickering in picture caused by leakage current, and hue shift (low output of one CRT) is caused by IK range.
RESOLUTION
This symptom will only occur with serial numbers starting with 90, which have the possibility of this symptom occurring. If the customer complains of any of the symptoms above please do the following:
Change on A Board: IK limiter range increase. (White balance change symptom)
R508 To 2.2k chip resistor P/N 1-216-825-91
R507 To 2.2k chip resistor P/N 1-216-825-91
Change on the D Board Heater Voltage change (Picture flickers symptom at dark scene)
R8061 To 1.8 ohm metal oxide P/N 1-216-392-11
The reference value of Heater resistor on D mount for RA-5A is identical to RA-6 models, R8061.
RA-6 RA-5A Value
R507 R3229 3.3K > 2.2K
R508 R3230 1K > 2.2K
NOTE: If symptom of Flickering in picture is still present after the resistor change was implemented then all three CRT's should be replaced. White balance and G-2 should be re-adjusted.
SUPPORTING DOCUMENTS AND GRAPHICS
Name: mod.pdf
Description: Location of R507 & R508
Size: 102740 bytes
Name: MOD2.pdf
Description: A Board location of R507 & R508
Size: 57510 bytes
Name: mod3.pdf
Description: D Board location of R8061
Size: 44631 bytes
MORE INFORMATION
Unit/Model Detail
Unit(s): SN Start SN End Factory Family Name Product Category
KDP57XBR2 9000001 9000565 PITT RA5A TVP
KDP65XBR2 9000001 9000340 PITT RA5A TVP
KP51HW40 90XXXXXX 90XXXXXX PITT RA6 TVP
KP51WS500 9000001 9020557 PITT RA6 TVP
KP57HW40 90XXXXXX 90XXXXXX PITT RA6 TVP
KP57WS500 9000001 9014575 PITT RA6 TVP