There are JFET, Depletion MOSFET and Enhancement MOSFET.
a. Enhancement MOSFET
Following is an example program: Control the voltage of gate from 2V to 3V till it turns on completely then measuring the Vds.b. JFET and Depletion MOSFET
Following is an example program: Control the voltage of ACTVAL (Vgs) from 2V to 3V till the FET pinches off.
Only measure the two ends of the diode of BC and BE for the transistor of Japanese’ transistor (ex : 2SAxxxx) to know if the diode is false soldering or wrong insertion.( ex: program step 1and 2). But for US transistor (ex : 2Nxxxx ), measure the transistor with three terminals (program step 3) to detect the wrong insertion is necessary due to the pin of base is in the middle. Following is an example program:
Following is an example program:
Control the base voltage to saturate the transistor.
1. When R1>10R2, R1 cannot be measured.
2. When XL >10R2, L cannot be measured. XL=2πfL.
3. When R2>10XL, R2 cannot be measured.
4. When the capacitor is with a relatively large capacity, prolong the delay time or make it in CV mode to measure the resistance. When 10R2<XC, C cannot be measured.
5. When R2>10Ω, the misoriented inserted D is detectable.
6. When L2>10L1, L2 cannot be measured.
7. When 10XL<XC, C cannot be measured; when 10XC<X L, L cannot be measured.
8. When RL<10Ω, D cannot be measured.
9. When C2>10C1, C1 cannot be measured. CAUTION! This feature is opposite to those of R and L.
10. When C2 is large, to measure D1 need long time. When D1and D2 are paralleled at the same direction, apply CM mode to measure them.
Yes, Just rename jet300n.exe as jet300d.exe and take off the jumper of the retest on the mother board. The ICT will become a dual press down unit.
When measuring the voltage (Vdc) between two terminal probes of the TestJet sensor and getting the values as listed, the sensor might be in the bad condition. Below are the reasons.
a. If Vdc=0V,
i. the probe number setting is wrong in test program.
ii. the cable of MUX board is bad.
iii. the cable is not well connected.
b. If Vdc=5V, the sensor plate might be open.
c. If Vdc=0.7V, the system board or MUX board go wrong.
d. If Vdc=4.5V, the mechanical function is fine.
a. Check if the Fix Auto flag in the status table is set “ON”
b. Check if the Proximity Reed Switch on the air cylinder is properly adjusted.
c. Check if the system control board, the cable and the fixture control board failed or not.
d. Check if the fixture control cable is properly plugged..
For small resistance measurement (0.1Ω~2Ω), regard it as jumper measurement. It is only for measuring if any missing components occur on the board. For more accurate measurement, four-wire-mode measurement is necessarily to be applied. The theory is as below:
Signal sources and measurement has different loop individually so that the voltage on RX could be correctly measured.
a. Take out the jumpers marked JA, JB and JC and make them open.
b. The short jumper is as for JA0, JA1, JA2, JA3, JB0, JB1, JB2, JB3, JG0, JG1, JG2 and JG3.
Make them open and short as
c. There are only 32 points left on relay board, because the second connector has been functioned as sense . To measure RX, set A as 1, B as 2 and pin 33 will set as sense
of pin 1 and pin34 as sense of pin 2 automatically.
d. The program should be set as below:
e. The modification is completed.
Yes, JET-300 does offer functional test. So far, we provide +5V, -5V, +12V, +3.3V power.
Add one more board with a 7-pin molex socket on the back of the fixture and set the program as below:
Press [Alt] + [k] simultaneously in the edit screen to show the relay code. Fill No.4 and e with 1 and turn on the relay to send out the proper voltage. Be sure to turn off the power after measuring. ( as step. 3 )
Use CM mode to measure the paralleled diode. Following is the example program:
Programming for Step 2 is to apply ACTVAL voltage (0.6v) to make the current about 40mA.
Example:
Open on B130 (B3: P2)
The message indicates that it is open on the P2 relay of the 3rd board belongs to the No.130 point of the B switch. Replace the P2 relay of B switch of the 3rd board so that the job is done.
(a) Leakage current measurement
If C1 were 100uF 25V, rewrite the program as STEP2, press F9 to measure the normal leakage current of the capacitor and fill the value in the STDVAL field. If C1 were misoriented inserted, the current value will be amplified. Remark : Each capacitor bears different durability, so the voltage under ACTVAL is not fixed.(b) Three-terminal measurement:
This method is used to measure the electrolyzed capacitor. Plant a probe on the top of the capacitor (as drawing shown) and rewrite the program as below:
NPN Transistor:
Set N in MD, 1 in RG and tune the Vb voltage in ACTVAL (start from 0.7V) until the utmost and stable βvalue is measured and fill the measured value in STDVAL. (ref. to STEP 1) PNP Transistor:
Set P in MD, 1 in RG and tune the Vb voltage in ACTVAL (start from 4.3V and downward), until the utmost and stableβvalue is measured and fill the measured value in STDVAL (ref. to STEP 2)
Remark : Each capacitor bears different durability, so the voltage under ACTVAL is not fixed.
Add external power and modify the hardware as following steps and attached drawing A.
Add external power and modify the hardware as following steps and attached drawing A.
b. Pin 1 for +5V, Pin 2 for GND, Pin5 for -5V, Pin6 for +12V and Pin7 for +3.3V. Please refer to the attached drawing B and program below to test its regulator IC output voltage VCC2VTT)If the STEP 8, 1 and 12 cannot release the voltage lower than 0.1V, increase the TM value to the STEP 7, 9 and 11 till the STD value of STEP 8, 10 and 12 lower than 0.1V.