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S CONFIDENTIAL CSV-1
Sony Service Company
National Technical Services Service Bulletin
A Division of Sony Electronics Inc.
Park Ridge, New Jersey 07656 TV Products
Model: KP-41T15, KP-41T25, KP-41T35, KP-46C36 No. 513R1
KP-46S15, KP-46S17, KP-46S25, KP-46V25
KP-46V35, KP-48S35, KP-48V45, KP-53S15
KP-53S17, KP-53S25, KP-53S35, KP-53V25
KP-53V35, KP-53V45, KP-53XBR45
KP-53XBR4CT, KP-61S35, KP-61V25
KP-61V35, KP-61V45, KP-61XBR48
Subject: CRT Replacement Date: August 21, 2001
Symptom:
(161X) Ground of replacement CRT may be different than the original. Heater resistor value
change may be required.
Solution: When replacing the CRT the following changes may be necessary.
1. When replacing the CRT the original may have used a braided wire across the CRT to ground the
CRT and CRT Board. The replacement CRT uses a grounding wire that connects to a ground lug.
This grounding lug wire should be packed in the replacement CRT box. See picture below.
See note on
last page
Ground wire P/N
1-900-235-84
Fig 1
Reference: CRT Group PJA PRINTED IN USA
TV Products Service Bulletin No. 513R1
2. Heater resistor value change.
When the CRT is replaced it is required to check the heater resistor value. This resistor value will
change depending on how many newer CRTs are used. It should be checked even if you are only
changing one CRT because one might have been replaced prior to your present repair. Failure to do so
may cause the CRT life span to be shortened.
In order to determine if the CRT heater resistor is the older value or not, check the color of the CRT
plastic pin base stem. (See Fig 1)
Black stem indicates an older CRT and the value of the heater resistor was not changed.
White stem indicates a newer CRT and the value of the heater resistor may require a different value.
3. Procedure for replacing the heater resistor.
1. After replacing the defective CRT, check the color of the CRT plastic pin base stem of all three
CRTs. (See Fig 1)
2. The value of the heater resistor, on the E or G Board depending on the model, will be
determined by how many of the CRTs have a white stem base. Refer to the chart below.
3. Check the heater resistor value in the set and confirm if it is the correct value as per the chart
below. If not please replace the resistor with the correct value.
Replace resistors for the heater circuit with the correct value resistors
specified by the number of the new heater CRTs as shown in the following chart.
Part Number Chart
Description Part Number
0.22 Ohm 1 Watt 1-216-341-11
0.47 Ohm 1 Watt 1-216-345-11
1.2 Ohm 3 Watt 1-216-390-11
1.5 Ohm 3 W 1-216-391-11
See the tables below to determine what value resistor change is required
if necessary.
New Heater Resistor
Quantity of new type CRTs (white stem base) in the set
after defective CRTs are replaced
Model Chassis Former Heater One Two Three Board
Resistor
KP-41T15 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-41T25 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-46S15 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-46S17 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-46S25 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-46V25 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-46V35 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-53S15 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-53S17 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-53S25 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-53V25 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP53V35 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-53XBR45 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-53XBR4CT RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-61V25 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-61V35 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
KP-61XBR48 RA-1 1 Ohm 1/12 W (R835) No need to replace 0.47 Ohm 1W 0.22 Ohm 1W E Board
Continue on next page
TV Products Service Bulletin No. 513R1
New Heater Resistor
Quantity of new type CRTs (white stem base) in the set
after defective CRTs are replaced
Model Chassis Former Heater One Two Three Board
Resistor
KP-41T35 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP-43C36 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP48S35 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP-48V45 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP-53S35 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP-53V45 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP-61S35 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
KP-61V45 RA-2 1.8 Ohm 3 W (R569) No need to replace 1.5 Ohm 3 W 1.2 Ohm 3W G Board
0.68 Ohm 3W (R540) No need to replace No need to replace 0.47 Ohm 3W
Note: As of 4/24/01, PJ CRT will begin the use of colored stem caps in their process. The color of the stem cap will match the color of the CRT.
They will begin with red and green. White will continue to be used on the blue tubes until the supply is exhausted, at which time they will begin the
use of blue stem caps also, we expect this to be sometime in June 2001. Please see picture below.
There has been no material change, only a dye added for color. Engineering analysis of dimensions, arc testing, flame testing, and pin cap
adhesion show no change in performance from our current stem cap.
Please note, that depending upon shipments, you may continue to see white stem caps only for some time.
TV Products Service Bulletin No. 513R1
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