TM503: Difference between revisions

Revision as of 11:21, 5 November 2023

Tektronix TM503
three-bay mainframe Tektronix TM503 Produced from 1972 to (?) Manuals TM503 TM503 Instruction Manual 070-1305-00 TM503 Technical Manual (US Army) TM503A TM503A Instruction Manual 070-6568-00 TM503B TM503B Instruction Manual 070-7808-00 (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix TM503 is a three-bay mainframe for the TM500 system.

All bays are low-power. It has a single strap carrying handle on the right side.

The TM503A moves the power switch to the rear and has a swiveling carrying handle that can also act as a stand.

The TM503B retains the power switch position and changes the handle material to plastic. It also allows the power supply/backplane part to be removed from the case so that modules to be repaired on the bench without using extenders (see link below). It also has openings for the TM5000 GPIB feature, but not the connectors nor the power good signal for TM5000 plugins.

Key Specifications

please add

Option 2

Option 2 adds internal pin headers for each slot as well as rear 50-pin and BNC connectors, allowing for custom wiring to, from and between plugins.

On the standard TM503, cutouts for three BNC sockets have been made in the rear frame, meaning that the user only needs to drill holes in the rear cover plate to install the sockets.

Option 7

Option 7 adds barrier keys (214-1593-02) and connections on the rear interface to allow connections between a DC502 Opt.7 to a TR502 or SW503, such that the center or marker frequency of a sweep can be read of the DC502.

Links

See Repairs page for video and replacement PCBs
TM503B @ amplifier.cd
TM503 repair @ paulcarbone.com
The Tektronix Function Generator Teardown - Paul Rako @ electronicdesign.com

Documents Referencing TM503

Document	Class	Title	Authors	Year	Links
Tekscope 1972 V4 N3 May 1972.pdf	Article	TM500 series - A New Dimension in Plug-in Instrumentation	Bob Ragsdale	1972	TM500 system • TM501 • TM503 • FG501 • FG502 • RG501 • PG501 • SG502 • DC501 • DC502 • PS501 • PS502 • PS503
Tekscope 1975 V7 N2.pdf	Article	The TM500 Mobile Test Lab	Dick Brown	1975	TM503 • MICS
067-1201-99 TM500 Power Module Constr Note.pdf	Application Note	TM500 Power Module Tester and Utility Power Supply	Warren Collier	1977	TM500 • TM501 • TM503 • TM504 • TM506 • TM515

Internals

The pass transistors on the low-power compartments are MJE2901 (151-0373-00, PNP) / MJE2801 (151-0349-00, NPN) − 60 V, 10 A, h_fE 25 - 100.

Pictures

TM503

TM503 inside
TM503 backplane
TM503 PSU

TM503A

TM503A front
TM503A top
TM503A rear

TM503B

TM503B Front view with plugins
TM503B Front view with PG502, SG504 and RO510 plugins
TM503B Front view without plugins
TM503B
TM503B side view
TM503B rear view
TM503B top view
TM503B bottom view
TM503B power supply front view
TM503B power supply top view
TM503B power supply rear view
Using a TM503B for repairing plugins
Using a TM503B for repairing plugins

Schematics

TM503 schematic
Block diagram
Interface connectors

@@ Line 30: / Line 30: @@
 ===Option 7===
-Option 7 adds barrier keys (214-1593-02) and connections on the rear interface to allow connections between the [[DC502]]-option7 to either a [[TR502]] or a [[SW503]] such that the center or marker frequency of a sweep can be read of the DC502.
+Option 7 adds barrier keys (214-1593-02) and connections on the rear interface to allow connections between a [[DC502|DC502 Opt.7]] to a [[TR502]] or [[SW503]], such that the center or marker frequency of a sweep can be read of the DC502.
 ==Links==
+* See [[TM503/Repairs|Repairs page]] for video and replacement PCBs
 * [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_500/TM503B/TM503B.html TM503B @ amplifier.cd]
 * [https://paulcarbone.com/blog/tektronix-tm-503-repair/ TM503 repair @ paulcarbone.com]
-* [https://www.youtube.com/watch?v=VkNRUI_QtWo Tektronix TM503 Mainframe Repair] by NFM @ YouTube (replacement PCBs)
 * [https://www.electronicdesign.com/technologies/test-measurement/article/21137778/the-tektronix-function-generator-teardown The Tektronix Function Generator Teardown] - Paul Rako @ electronicdesign.com
 {{Documents|Link=TM503}}
-==Gerbers==
+==Internals==
-* [[Media:TM503_PCB's.zip|TM503 replacement PCB's]] (ZIP) (See TM503 Repair link below)
+The [[Media:TM5xxx_Pass_Transistor_List_(2021-09).pdf|pass transistors]] on the low-power compartments are MJE2901 (151-0373-00, PNP) / MJE2801 (151-0349-00, NPN) − 60 V, 10 A, h<sub>fE</sub> 25 - 100.
 ==Pictures==
@@ Line 74: / Line 74: @@
 Tek_tm503b_extender02.jpg      | Using a TM503B for repairing plugins
 </gallery>
-====Schematics====
+===Schematics===
 <gallery>
 TM503-schematic.png | TM503 schematic