bulletin_TVP0513_©_.pdf part of Sony KP-41T15, KP-41T25, KP-41T35, KP-46C36, KP-46S15, KP-46S17, KP-46S25, KP-46V25, KP-46V35, KP-48S35, bulletin_TVP0513_©_.pdf, Symptom: Ground of replacement CRT may be different than the original. Heater resistor value change may be required

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S
Sony Service Company National Technical Services A Division of Sony Electronics Inc. Park Ridge, New Jersey 07656

CONFIDENTIAL
Service Bulletin TV Products
No.

CSV-1

Model:

KP-41T15, KP-41T25, KP-41T35, KP-46C36 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

513R1

Subject: CRT Replacement Symptom: (161X)

Date: August 21, 2001

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
0.22 Ohm 1 Watt 0.47 Ohm 1 Watt 1.2 Ohm 3 Watt 1.5 Ohm 3 W

Part Number
1-216-341-11 1-216-345-11 1-216-390-11 1-216-391-11

See the tables below to determine what value resistor change is required if necessary.

Model KP-41T15 KP-41T25 KP-46S15 KP-46S17 KP-46S25 KP-46V25 KP-46V35 KP-53S15 KP-53S17 KP-53S25 KP-53V25 KP53V35 KP-53XBR45 KP-53XBR4CT KP-61V25 KP-61V35 KP-61XBR48

Chassis RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1 RA-1

Former Heater Resistor 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835) 1 Ohm 1/12 W (R835)

New Heater Resistor Quantity of new type CRTs (white stem base) in the set after defective CRTs are replaced One Two Three No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.47 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W 0.22 Ohm 1W

Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board E Board

Continue on next page

TV Products Service Bulletin No. 513R1

Model KP-41T35 KP-43C36 KP48S35 KP-48V45 KP-53S35 KP-53V45 KP-61S35 KP-61V45

Chassis RA-2 RA-2 RA-2 RA-2 RA-2 RA-2 RA-2 RA-2

Former Heater Resistor 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540) 1.8 Ohm 3 W (R569) 0.68 Ohm 3W (R540)

New Heater Resistor Quantity of new type CRTs (white stem base) in the set after defective CRTs are replaced One Two Three No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.5 Ohm 3 W No need to replace 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W 1.2 Ohm 3W 0.47 Ohm 3W

Board G Board G Board G Board G Board G Board G Board G Board G Board

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