TS440s Self Test Extracted from 26 May 86 letter of Brian Kantor, WB6CYT Ammended 19 Mar 91 by GRThompson, N6SWC Self-Test: You can run a rather complete test of the control logic by the built-in "semi-self-test", a series of 56 routines. To run this, turn the unit on whilst holding the AM and T-F SET switches pushed in. It changes to the next test when you turn the VFO knob clockwise. Turn the power OFF to reset the unit. Test What it does ---- --------------------------------------------------- 0 all positions in display light 1 all segments in display dark 2 all positions in display light 3 all segments in display dark 4 rightmost position 8 and SUB lighted 5 next position :8 and XIT lighted 6 next position 8 and RIT lighted 7 next position -8 lighted 8 next position 8. and STEP lighted 9 next position 8. and * lighted 10 next position 8. and SPLIT lighted 11 next position 8. and B lighted 12 next position 8. and VFO lighted 13 next position 8. and A lighted 14 next position 8. and SCAN lighted 15 next position 8. lighted 16 leftmost position 8 and M.CH lighted 17 tone on 18 tone off 19 all mode LEDs and white noise ON 21 all mode LEDs and white noise OFF 21 ON AIR ON 22 ON AIR OFF The following tests change internal signals. They are most useful if you are trying to trace the circuits controlled by these signals. You'll need a service manual (or at least a schematic) to make real sense of these. 23 BAND select - all lines high 24 BAND select - all lines low 25 PD select - all lines high 26 PD select - all lines low 27 ENF select - all lines high 28 ENF select - all lines low 29 ENP select - all lines high 30 ENP select - all lines low 31 RES select - all lines high 32 RES select - all lines low 33 CO select - all lines high 34 CO select - all lines low 35 AX select - all lines high 36 AX select - all lines low These next tests check the outputs of the 8255 parallel port interfaces, which select several internal functions. 37 (IC2) port A all lines high and beep 38 (IC2) port A all lines low 39 (IC2) port B all lines high 40 (IC2) port B all lines low 41 (IC2) port C0-C3 high, C4-C7 low, M.SCR 1MHz and F.LOCK ON 42 (IC2) port C0-C3 low, C4-C7 high 43 (IC53) port C all lines high 44 (IC53) port C all lines low The following tests display busy and scan line status using the rightmost eight digits of the display. You will push buttons to cause the digit to change from a 1 to a 0 indicating that the associated button has been pushed. AT (ATUNE) also requires AUTO. Any TX means PTT, SEND, AT or VOX ON with sound. test posn8 posn7 posn6 posn5 posn4 posn3 posn2 posn1 ---- ----- ----- ----- ----- ----- ----- ----- ----- 45 LOCK AT Mic UP Mic DN Any TX VS1 46 audible "SIMPLEX" no button 47 (key scanner) 48 1 6 V/M VOICE 49 2 7 M>V RIT A/B 50 3 8 SCAN XIT SPLIT 51 4 9 M.IN T-Fset A=B dip3 dip4 dip5 52 5 0 CLEAR 1MHz dip1 dip2 dip6 dip7 53 ENTER DOWN UP dip8 dip9 dip10 The digits 0-9 are on the front panel keyboard. Dip2-dip10 are the segments of S50, the SSB frequency response dipswitch of the control unit printed circuit board. Changing not recommended. 54 not used 55 not used 56 END