TM500 system/Repairs

To repair or calibrate TM500 plug-ins, a plug-in extender is often required.

Some options include:

• The original Tektronix 067-0645-02 flexible plug-in extender
• Using a TM503B mainframe that allows easy separation of the power supply/backplane unit from the case (s.b.), or a TM501 in a similar way
• Using the power module part of the TM515 that is easily removed from the case (two thumbscrews)
• Modifying readily available "JAMMA" game console cable extenders (s.b.)
• Custom PCB with card-edge connector

Pictures

• 

  Original Tektronix 067-0645-02 flexible extender

• 

  TM503B power section used for TM500 module maintenance

• 

  TM515 power module removed from case

• 

  JAMMA cable harness modified for use as TM500 extender

• 

  Modified JAMMA cable - contact pad and key slot cuts

• 

  Modified JAMMA cable - key added to connector (piece of 0.5 mm PCB)

Pass Transistors

Thus table is imported from a document compiled by Jerry Scheltgen and Dennis Tillman with updates from Jared Cabot.

Tek Part No	Type	Manufacturer ref	IC	BVCEO	PWR	hFE @ IC	Vsat	Ft min.	Case	Used in	DigiKey	Farnell	Mouser	RS
151-0140-00	NPN	2N3055H	15 A	60 V	115 W	20 @ 4 A	1.1 V	0.3 MHz	TO-3
151-0258-00	PNP	2N4905	15 A	60 V	87 W	20 @ 4 A	3.0 V	4.0 MHz	TO-3
151-0349-00	NPN	MJE2801	10 A	60 V	90 W	25 @ 3 A	1.1 V	2.0 MHz	TO-127	TM501, TM501A, TM503
151-0373-00	PNP	MJE2901	10 A	60 V	90 W	25 @ 3 A	1.1 V	2.0 MHz	TO-127
151-0413-00	NPN	2N6258	30 A	80 V	250 W	20 @ 15 A	3.0 V	0.8 MHz	TO-3
151-0436-00	PNP	MJE2801	10 A	85 V	90 W	25 @ 3 A	1.1 V	2.0 MHz	TO-127
151-0652-00	NPN	TIP35C	25 A	100 V	125 W	10 @ 15 A	4.0 V	3.0 MHz	TO-218
151-0651-00	PNP	TIP36C	25 A	100 V	125 W	10 @ 15 A	4.0 V	3.0 MHz	TO-218
151-0917-00	NPN	-	15 A	80 V	-	-	-	-	-
151-0918-00	PNP	-	15 A	80 V	-	-	-	-	-
151-0937-00	NPN	MJF3055	10 A	90 V	30 W	5 @ 10 A	2.5 V	2.0 MHz	TO-220
151-0938-00	PNP	MJF2955	10 A	90 V	30 W	5 @ 10 A	2.5 V	2.0 MHz	TO-220

See also

• TM500 Fused Extender