Telex 1505 service manual Conn Jumper Plug JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9

Page 16

Part No.	Description	Ckt
		Sym
286-1766	CONN JUMPER PLUG	JP1
		JP2
		JP3
		JP4
		JP5
		JP6
		JP7
		JP8
		JP9
		JP10
		JP11
		JP12
		JP13
286-1772 CONNECTOR 36PIN STRIP TIN		JP1
		JP2
		JP3
		JP4
		JP5
		JP6
		JP7
		JP8
		JP9
		JP10
		JP11
		JP12
		JP13
286-1964 TEST POINT YELLOW .055 MNT		TP1
		TP2
		TP3
		TP4
		TP5
		TP6
		TP7
		TP8
		TP9
		TP10
		TP11
		TP12
		TP13
		TP14
		TP15
		TP16
		TP17

TP18

TP19

TP20

Part No.	Description	Ckt
		Sym
286-2011	CONN PCB MODULAR 4PIN HS	J1
299-0303	SWITCH 6PST DIP	S1
		S2
		S3
		S4
		S5
318-0246	XFORMER 10K CT-10K CT	T1
		T2
		T5
		T6
318-0259	XFORMER 600CT-600CT	T3
		T4
		T7
		T8
425-0178	INT CKT NE570N	U5
		U6
		U8
425-0210	IC OPAMP LM348 QUAD	U1
		U9
425-0488	OPAMP QUAD LMC660 OV INP	U2
		U3
425-0529	IC CMOS SW DG212B 4XSPST	U4
		U7
425-0530	IC LM2937 ET-10 VOLT REG	U11
534-0001	SCREW PH 4-40X1/4 NYLOK
538-0075	NUT KEP 4-40
614-0434	HEAT SINK TO-220 21C/W

13

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Contents Audio Line Driver Optional Features include Table of ContentsInspection Power Access for Installation/ServicingMounting Function Jumper Status Out Signal Connections and Card Edge Con- nector Pin AssignmentJumper Options Switch Settings Microphone JumpersReceive Line Input Impedance Parallel Transmit Line Impedance MatchingInterface connector Numbering Controls and IndicatorsSecuring the Connections Operation DescriptionCard Edge Connector Pin Assignments Solder Side Component SideTheory of Operation General Receive AmplifierCompression Limiter Circuit Transmit Line AmplifierPage Page Page Indicators Power SupplyWarranty Limited Microphone InputSpecifications Parts List Part No. Description Ckt Sym Conn Jumper Plug JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 JP9 East Cornhusker Highway, Lincoln, Nebraska