72 Starting Fault Finding

After each step, continue with the next step, unless stated otherwise. Power the test tool by the battery pack only, then by the power adapter only. 1. The test tool operates with the power adapter, but not with the battery only install a charged battery (VBAT > 4V), and check the connections between the battery and the test tool (X503, R504, R506, R507). 2. The test tool operates with the battery pack, but not with the power adapter only, and the battery pack is not charged by the test tool...

Of Contents

1 Safety 1.2 Safety 1.3 Caution and Warning 1.5 Impaired 1.6 General Safety 2.2 Dual Input 2.2.4 Advanced Scope 2.3 Dual Input 2.3.1 Input A and Input 2.3.2 Input 2.3.3 Advanced Meter 2.6 Service and 2.8 EMC 3 Circuit 3.2 Block 3.2.1 Channel A, Channel B Measurement 3.2.2 Trigger 3.2.3 Digital 3.2.4 Power 3.2.5 Start-up Sequence, Operating 3.3 Detailed Circuit 3.3.1 Power 3.3.2 Channel A - Channel B Measurement 3.3.3 Trigger 3.3.4 Digital 4 Performance 4.2 Equipment Required For 4.3 How To 4.4...

741 Test Tool Completely Dead

Keep the keys - D pressed, and turn the test tool on again. This will start up the mask software. If you still hear no beep, continue at step 2. If you hear a weak beep now, continue at Section 7.4.2. 2. Check the Keyboard ROW1 line (MS433 next to X452) for a 100 kHz square wave. If not correct, continue at step 3. If correct, the mask software runs, but the buzzer circuit does not function. Check the buzzer function (Section 7.5.10), and then continue at Section 7.4.2....

512 Calibration number and date

When storing valid calibration data in FlashROM after performing the calibration adjustment procedure, the calibration date is set to the actual test tool date, and calibration number is raised by one. To display the calibration date and - number 1. Press to open the USER OPTIONS menu. 2. Press IEBI to show the VERSION amp CALIBRATION screen see Figure 5.1 . 3. Press 1 1 to return to normal mode. SOFTUARE UERSIOH U01.00 CALIBRATION NUMBER 3 CALIBRATION DATE 12 10 1996 BATTERY REFRESH BATE 12 10...

627Removing the Keypad and Keypad Foil

Referring to Figure 6-1, use the following procedure to remove the keypad and the keypad foil. 1. Remove the display assembly see Section 6.2.6 . 2. Remove the keypad foil. Notice the four keypad foil positioning pins in the top case. To avoid contaminating the keypad contacts, and the keypad foil contacts with oil from your fingers, do not touch the contacts or wear gloves . Contaminated contacts may not cause immediate instrument failure in controlled environments. Failures typically show up...

74 Starting with a Dead Test Tool

If the test tool cannot be turned on, when powered by a charged battery pack, or by the power adapter, follow the steps below to locate the fault. 1. Connect a power adapter and a charged battery pack. 2. Turn the test tool on and listen if you hear a beep. a. If you hear no beep, continue at 7.4.1 Test Tool Completely Dead. b. If you hear a weak beep, continue at 7.4.2 Test Tool Software Does not Run. c. If you hear a normal beep, the software runs, but obviously the test tool is not...

10 Mq

To protect the current source from being damaged by a voltage applied to the input, a PTC resistor R172 and a protection circuit are provided See Section 3.3.3 Current Source . During measuring, input voltage measurements, gain measurements, and zero measurements are done. As a result, the voltage supplied to the ADC is a multiplexed zero, reference, -reference, input voltage signal. Capacitance Measurements Channel A The capacitance measurement is based on the equation C x dV I x dt. The...

Tasic Oq0257

Reference Voltage Section The output of an amplifier in the P-ASIC supplies a current to the 1.23V reference source V301 via R307. The 3.3V REFPWM2 voltage is used as reference for the PWMB outputs of the D-ASIC on the Digital part. The 1.23V REFP voltage is used as main reference source for the reference circuit. This circuit consists of four amplifiers in the T-ASIC, external gain resistors, and filter capacitors. Amplifier 1 and connected resistors supply the REFPWM1 reference...

Vchdrive Vchdrive 13v

Block Diagram Flyback Converter

V506 OFF V506 ON When the test tool is not turned on, the Fly Back Converter does not run. In this situation, the 3V3GAR voltage for the D-ASIC, the FlashROM, and the RAM is supplied via transistor V569. The voltage is controlled by the VGARDRV signal supplied by the P-ASIC pin 69 . The current sense voltage across R580 is supplied to pin 70 VGARCURR . The voltage 3V3GAR is sensed on pin 66 for regulation. The internal regulator in the P-ASIC regulates the 3V3GAR voltage, and limits the...

8

Amplifier 3 and 4 and connected resistors supply the REFADCT and REFADCB reference voltages for the ADC's. Both voltages directly influence the gain accuracy of the ADC's. The T-ASIC can select some of the reference voltages to be output to pin 8 REFATT . The REFATT voltage is used for internal calibration of the input A and B overall gain. The T-ASIC generates the TRACEROT signal, used by the C-ASIC's. Control signals TROTRST and TROTCLK are provided by the D-ASIC. The Channel A B AC DC relays...

List of Tables

Trace Disturbance lt 2-3. Multimeter Disturbance lt 3-1. Fluke 123 Main 3-2. Fluke 123 Operating 3-3. Voltage Ranges And Trace 3-4. Ohms Ranges, Trace Sensitivity, and 3-5. Capacitance Ranges, Current, and Pulse 3-6. D-ASIC PWM 4-1. Input A,B Frequency Measurement Accuracy 4-2. Volts DC Measurement Verification 4-3. Volts AC Measurement Verification 4-4. Input A and B AC Input Coupling Verification 4-5. Volts Peak Measurement Verification 4-6. Phase Measurement...