Bose-1800V-pwr-sup4 电路图 维修手册.pdf

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1、 SUPPLEMENT Supplement Part Number 181812-S4 1997 Bose Corporation Rev00 08/97 Model 1800V Professional Stereo Power Amplifier The thermistors RT100 and RT200 used in the 1800V protection circuit have changed. The resis- tors R41 and R84 had to be changed to match the new thermistors. The thermistor

2、s RT100 and RT200 are located on the amplifier PCB. The resistors R41 and R84 are located on the I/O PCB. Refer to the 1800V service manual, part number 181812, for disassembly procedures, schematics, and PCB layouts. Refer to the figures on the back of this page for the location of the thermistors

3、and resistors. The tables below list the proper resistor and thermistor combination. It is not neces- sary to change these components unless they have failed. Insert this supplement into the 1800V service manual, part number 181812 REV 00. New ThermistorOld Thermistor Reference Designator DescriptionNew Part Number RT100, 200Thermistor, NTC, 1/2W, 5%, 1k 195253 R41, 843.32k, MF, 1/4W, 1% 195252 Reference Designator DescriptionOld Part Number RT100, 200Thermistor, NTC, 1/2W, 5%, 1k 182785 R41, 842.21k, MF, 1/4W, 1% 182908 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库