Tequipment Agilent E361 Serie Manual De Funcionamiento Y Servicio página 27

STEP ACTION
4 Check voltage from pin 13 to
pin 12 of U9.
5 Check voltage from pin 6
to pin 5 of U9.
STEP MEASURE
1 Set output voltage to 4.5 V +- 0.5 V for E3614A.
Set output voltage to 10 V +- 1 V for E3615A.
Set output voltage to 15 V +- 1 V for E3616A.
Set output voltage to 26 V +- 5 V for E3617A.
2 E3614A Waveform form from
E3615A TP6(common) to point 6
E3616A Voltage from TP6
(common) to point 6
3 Voltage from TP6(common) to
U4 pin 1
4 Voltage from TP6(common) to
U5 pin 1
5 Voltage from pin 6 to
pin 7 of U5
6 Set output voltage to 7 V +- 1 V for E3614A.
Set output voltage to 16 V +- 2 V for E3615A.
Set output voltage to 25 V +- 2 V for E3616A.
Set output voltage to 44 V +- 5 V for E3617A.
7 Waveform form from TP6
(common) to point 7
8 Voltage from TP6(common)
to U4 pin 14
9 Voltage from TP6(common)
to U5 pin 14
10 Voltage from pin 8 to
pin 9 of U5
Table A-5. Low Output Voltage Troubleshooting (Cont'd)
RESPONSE
a. Measured voltage is positive.
b. Measured voltage is negative.
a. Measured voltage is positive.
b. Measured voltage is negative.
Table A-6. Preregulator/Control Circuit Troubleshooting
a. Normal firing pulse
b. No firing pulse
a. High voltage (+0.7 V)
b. Low voltage (0 V)
a. Low voltage (-12 V)
b. High voltage (+5 V)
a. High voltage (+15 V)
b. Low voltage (-12 V)
a. Measured voltage is positive.
b. Measured voltage is negative.
a. Normal firing pulse
b. No firing pulse
a. Low voltage (-12 V)
b. High voltage (+5 V)
a. High voltage (+15 V)
b. Low voltage (-12 V)
a. Measured voltage is positive.
b. Measured voltage is negative.
a. Check U9A is defective.
b. Check U10 and U9D is defective.
Check R85 is open.
a. U9B is defective.
b. Check U9C is defective.
RESPONSE
A-11
PROBABLE CAUSE
PROBABLE CAUSE
a. Check CR18, CR15, Q7, Q8
for defective.
b. Proceed to step 3.
a. CR15, CR18, U2, U21
defective
b. Proceed to step 3.
a. U3 defective
b. Proceed to step 4.
a. U4 defective
b. Proceed to step 5.
a. U5 defective
b. U6 defective
a. CR10, CR12, Q5, Q6
defective
b. Proceed to step 8.
a. U3 defective
b. Proceed to step 9.
a. U4 defective
b. Proceed to step 10.
a. U5 defective
b. U6 defective