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D
T
P
IGITAL
ROUBLESHOOTING
ROCEDURES
&F
L
AULT
ISTING
1. Knurr case removal.
2. Rittal case removal.
3. A/D board, I/O board, and controller board access instructions.
4. Voltage Busline and Crystal Checkout.
5. Open Ground fault indicator lamp lit.
• Open Ground circuit disable instructions for 6kV, 12kV, 24kV, D-Series
testers.
6. Hipot Trip fault indicator lamp lit.
7. Hipot Current Bar display not present.
8. CRT blank when PTT button depressed/surge mode.
9. Hipot voltage bar display not present.
10. Seconds/div, volts/div, µA/div, or function display incorrect.
11. Printer does not work properly.
12. No Baker logo displayed.
13. No Hipot voltage at test leads.
14. No surge voltage display.
15. Voltage drops when PTT button released.
16. Zero Start Interlock does not engage.
17. PI Value or current measurement inconsistent.
18. Display locked up after self-test.
19. Display unreadable and flashes on/off, does not initiate self-tests.
1
Baker Instrument Company
The Measure of Quality
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Related Manuals for Baker Instrument Company D6000
Summary of Contents for Baker Instrument Company D6000
- Page 1 15. Voltage drops when PTT button released. 16. Zero Start Interlock does not engage. 17. PI Value or current measurement inconsistent. 18. Display locked up after self-test. 19. Display unreadable and flashes on/off, does not initiate self-tests. Baker Instrument Company The Measure of Quality...
- Page 2 5. Grasp the CRT bezel in one hand and the test leads with the other hand and pull straight out of the blue Knurr case. Handle Assembly for Knurr Case Baker Instrument Company The Measure of Quality...
- Page 3 Note: For D12000 and DS212 units that are Power Pack capable, this will involve an additional step for removal of a pot core that is mounted adjacent to the 12 volt fan. Handle Assembly for Rittal Case Baker Instrument Company The Measure of Quality...
- Page 4 To narrow down to which assembly is defective can be done quickly by unplugging sequentially the I/O, A/D, and the Controller boards and the CRT 10 pin connector one at a time and Baker Instrument Company The Measure of Quality...
- Page 5 7. Loss of frequency on Y1 on the Controller board will cause a blinking effect on the tester CRT with no recognizable lettering or numeric display. Tester will not initiate it’ s self-tests nor will any controls have any change on the display. Replace Y1. Baker Instrument Company The Measure of Quality...
- Page 6 8. Check U9 pin 3 on the I/O board for a 0 volts and U9 pin 4 for five (5) volts DC, if not replace U9. 9. Check Q6 on the I/O board for a collector to emitter short, if so then replace Q6. 10. Check for a shorted Open Ground LED. Baker Instrument Company The Measure of Quality...
- Page 7 Grasp the CRT bezel in one hand and the test leads with the other hand and pull straight out of the Knurr case. Skip to step 10. Baker Instrument Company The Measure of Quality...
- Page 8 T1 high voltage transformer. 3. Check for shorted SCR’ s on the Stack board by measuring the resistance across all cathode/anode junctions of each SCR. These measurements can be obtained easily by Baker Instrument Company The Measure of Quality...
- Page 9 6 volts with the same negative going square waveform. If not replace U22. 9. Measure at U23 pin 7, if same measurements taken in step 8 is not present, replace U23. Baker Instrument Company The Measure of Quality...
- Page 10 Q1, Q2, and Q3 for faults. The Stack trigger signal is then routed to J1 pin 4 on the Stack board. Possible loading of this signal can also be attributed to component defects in the Stack board trigger and charging circuit such as C1 or Q6. Baker Instrument Company The Measure of Quality...
- Page 11 3. Check at U12 pin 6 on the I/O board for the same increase in voltage, if not present, replace U12. 4. Check U3 pin 6 on the I/O board for the same increase, if not present, replace U3. Baker Instrument Company The Measure of Quality...
- Page 12 µA/DIV 1 and µA/Div 2. See binary chart on the I/O board. A typical fault will be seen as a duplication of any one of the possible µA/ Baker Instrument Company The Measure of Quality...
- Page 13 1. Upon power up if no display is seen on the CRT, the first step to ensure is that the intensity output potentiometer is turned clockwise are enough to see a display, generally at least a 2 O’ clock position should be sufficient. Baker Instrument Company The Measure of Quality...
- Page 14 3 volts AC. At approximately ½ output turning clockwise this voltage will be ½ line voltage. If not present, check the neutral connection to the variac, if this connection is present replace T2. Baker Instrument Company The Measure of Quality...
- Page 15 2. Measure at T2 pin 2 with a digital multimeter, connect positive lead at this point and the negative lead to chassis ground. Set the meter to AC volts. This point should be at line voltage upon turning on/off switch to the on position. Baker Instrument Company The Measure of Quality...
- Page 16 The signal at this point should be about a 1.8-volt surge waveform. If not check continuity with the tester AC input disconnected from P1 pin 32B & 32C on the I/O board to J1 pins 3 and 4 on the Discharge board. Baker Instrument Company The Measure of Quality...
- Page 17 Zero Start Interlock board. Mount by drilling two mounting holes and securing with mounting hardware. Wiring additions or changes involve the following. To perform this modification removal from the case is required. Remove mounting hardware on the Baker Instrument Company The Measure of Quality...
- Page 18 11. Run a 20 gauge green wire from the 2N2222-transistor emitter and connect to the ground terminal block. 12. Reassemble unit. TART NTERLOCK DOES NOT ENGAGE 1. Check that the output control knob is completely adjusted counter-clockwise. Baker Instrument Company The Measure of Quality...
- Page 19 1. The use of a Patriot line conditioner in series with the power to the tester will reduce line fluctuations. Contact Baker Instrument Company for price and availability. Baker Instrument Company The Measure of Quality...
- Page 20 5. Check at U15 pin 8 for a high state, if this is not high replace RPK3. Depress softkey 4. At this point it should change to a low state. 6. Change U15. Baker Instrument Company The Measure of Quality...
- Page 21 It may also be necessary to check defective signals lines with a digital multimeter set to ohms for shorts to GND and to +5 volts DC. Also check Baker Instrument Company The Measure of Quality...
- Page 22 8. Access to the Controller board, Baker part 80-107, is now gained. This will be the only board left in the card cage. Simply grasp this assembly and pull away from the front panel. 9. Remove the Controller board and replace U3 with one labeled firmware revision 1.37. Baker Instrument Company The Measure of Quality...
- Page 23 7. The addition of relays K1 and K2 and associated wiring harness changes were added to eliminate the condition where the displayed surge voltage on the CRT would drop approximately 10% when the PTT button was released. Baker Instrument Company The Measure of Quality...
- Page 24 Epson 640 printer or compatible printer. It is also necessary to be installed if this tester is used with MTA for Windows operating software system. 9. A/D board grounding changes, clamping diodes and bypass capacitors were added to increase the reliability of IC U14. Baker Instrument Company The Measure of Quality...