1.4.10.3 - Norsk Data utility, Tektronix

A great instrument, but unfortunately it fails in the power-on selftest with the message:

MODULE		AREA	ROUTINE	INDEX
TRIGGER	FAIL	SEQ CTRL	1	6111

The rest of the modules; I/O, frontpanel, display, control and all the interfaces cards pass the selftest. I can press the softkey "Enter normal operation", and the instrument seems to operate normally. According to the manual, this is the correct behavior, but it may have some functional limitations.

The Tektronix 1240 Logic Analyzer Easter Egg (see The Easter Egg Archive) Up-arrow, D, A, D which scrolls the Engineering Team over the screen works just fine.

Manuals for the Tektronix 1240/1241 Logic Analyzer.

Front view:

The display with the touch screen, there are 10 predefined positions for the touch buttons, 5 at the top and 5 at the bottom of the screen.
The Execute buttons: Start, Stop and Auto.
The Scroll wheel.
The Menu buttons: Config, Trigger, Data, Edit and Utility.
The digits: 0..9, A..F, X (don't care) and Glitch.
The two select buttons: Up and Down.
The navigations buttons: Left, Right, Up, Down and Next.
The DC on/off switch.

Rear view:

The main AC power switch.
The main AC fuse which should be 5AF (fast) when used on the 115V net and 2.5AF (fast) on the 230V net.
The main AC power connector.
The main AC line voltage selector (115V/230V).
Coaxial connector for the video output (external display).
A contrast knob for the internal display.
Two coaxial connectors for external trigger input and output.
A slot for a COMM PACK (not used).

Right view:

All the connectors for the probes, one common for clocks, triggers etc. and 8 data probes numbered from 0 to 7. Behind the slots 0 and 1 we have a 9 channels interface card so the slot 1 is not used, the rest of the slots are filled with 18 channels interface cards.
A slot for a PROM/RAM PACK.

The boards found inside:

The mother or interface board 670-7528
- (J850) The control processor 670-7527
  - Intel 8088 CPU
  - Intel 8203 DRAM Controller
  - PROM 160-1575-01
  - PROM 160-1576-01
  - PROM 160-1577-01
  - PROM 160-1578-01
  - PROM 160-1579-01
  - PROM 160-1580-01
  - PROM 160-1581-01
  - PROM 160-1582-01
- (J750) The I/O processor 670-7526
  - MOSTEK MK3880N
  - PROM 160-1569-01
  - PROM 160-1570-01
  - PROM 160-1571-01
  - PROM 160-1572-01
  - PROM 160-1573-01
- (J650) The display controller 670-7525
  - PROM 160-1107-00
  - Crystal 119-1502-00
  - PROM 160-1583-00
- (J450) The probe interface 670-7703, 18 channels
  - 160-1917-00 x 3 pieces
- (J450) The probe interface 670-7703, 18 channels
  - 160-1917-00 x 3 pieces
- (J350) The probe interface 670-7703, 18 channels
  - 160-1917-00 x 3 pieces
- (J250) The probe interface 670-7524, 9 channels
  - 155-0270-00 x 3 pieces
- (J150) The trigger module 670-7523