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CORRECTIVE MAINTENANCE
7-7
7.
1.4.2
Performance Verification Procedure
The Performance Verification Procedure is a very quick way to check most of the ScopeMeter's
specifications. It is based on the specifications listed in Chapter 2 of this Service Manual. If the
instrument fails of any of these tests, Calibration Adjustments (see chapter 5) and/or repair (see
chapter 7) is necessary. The complete Performance Verification Procedure is described in chapter 4.
7.1.5
Troubleshooting
7.
1.5. 1
Trouble shooting hints
OPENING THE SCOPEMETER:
To troubleshoot the ScopeMeter, open the instrument as described in subsection 6.2.2 "Opening the
ScopeMeter" of chapter 6 "DISASSEMBLING THE SCOPEMETER".
TEST POINT AND COMPONENTS LOCATION:
Added with the PCB layouts figures 1 0.1, 10.4, and 10.5 and the circuit diagrams figures 10.2, 10.3,
10,6, 10.7, and 10.8 are location reference lists for fast location of the test points and the components.
CONNECTING THE GROUND (ZERO) LOGIC 0 REFERENCE:
While performing measurements, it is possible to use the metal shielding as zero reference. It is also
possible to install the metal screws, as is described in section 5.6.1 "Hardware SCOPE Calibration
Adjustments". You can use one of the screws as a zero reference: refer to figure 5.2.
LOGIC 1 LEVEL:
The logic one level is +5V.
7.1.6
Digital A1 PCB Troubleshooting
First remove the digital A1 PCB as described in section 6.2.4 "Removing the digital PCB".
7. 1.6. 1
Powering the ScopeMeter
Power the ScopeMeter with the powerAdapter/Battery Charger PM8907.
7. 1.6.2
Kernel Test
The Kernel tests the Address/Data outputs from the microprocessor (D1201), the interface
transmitter and receiver circuits of the optical interface, and the Random Access Memories (RAM).
The test results are measured with an oscilloscope.
NOTE: If loading the ScopeMeters FlashROMs fails, it is possible to get
a
ScopeMeter which is not
functioning. For example: if the operating system of the ScopeMeter is corrupted,
it
is not
possible to operate the instrument normally. In this case you should also use the following
procedure to establish communication with the ScopeMeter. When communication is
established, you can reload the operating software into the FlashROMs. (For this action you
need special software: contact your nearest Fluke/Philips Service Center.)
1 .
Power the ScopeMeter with the Power Adapter/Battery Charger PM8907.
2.
Ground testpoint TP216, turn on the ScopeMeter and release the ground (from testpoint TP216).
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Troubleshooting
