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Unomat/trxhb/trxhb
Mode Trimmer Reading Measure at: Defect.board
Make connections as per diagram 2, see section
User connection diagrams
In 0Ω zero source 0 mV* TP1 - TP2 analogue
In 0Ω zero Ω in 0Ω TM1 - TM2 - TM3 0Ω analogue
In 390Ω span Ω in 390Ω TM1 - TM2 - TM3 390Ω analogue
End of calibration procedure
Check points
Test Perform Measure/display Defect.board
OPEN LOOP (displ.) TM4 - TM5 open Output 0.4mA processor
LOAD RES. TOO LOW Short TM9 - TM10 Output 2mV processor
(disp.)
XMTR 24VDC Voltage TM6 - TM7 25 V* power
XMTR 24VDC Current Short TM6 -TM7 TM6 - TM7 33 mA* power
Power supply TP7 - TM6 +7.5 V* power
Power supply TP8 - TM6 -7.5 V* power
Power supply TP9 - TM9 +15 V* power
Power supply TP10 - TM9 +25 V* power
Power supply TP11 - TM9 +5 V* power
Power supply TP12 - TM9 -4.5 V* power
Note: measured values are within +10%
Miscellaneous
Mode Problem Trimmer Defect
On No display indication power/keyboard
poor batteries
On Display contrast displ. angle display
On Display of horz. displ./process
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