Sony KP-41T15, KP-41T25, KP-41T35, KP-46C36, KP-46S15, KP-46S17, KP-46S25, KP-46V25, KP-46V35, KP-48S35, free download

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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