Disassembling The Scopemeter; General Information; Disassembly Procedures - Philips SCOPEMETER PM93 Service Manual

DISASSEMBLING THE SCOPEMETER
6 - 1
6 DISASSEMBLING THE SCOPEMETER
6.1 GENERAL INFORMATION
Whenever the ScopeMeter needs repair and/or Hardware SCOPE Calibration Adjustments, the
instrument must be disassembled.
NOTE: For replacement of components refer to section 7.2; for Hardware SCOPE Calibration
Adjustments refer to section 5.6. 1.
This section provides the required disassembling procedures. Both printed circuit boards removed
from the instrument must be adequately protected against damage, and all normal precautions
regarding the use of tools must be observed. During the disassembly process, make a careful note
of all disconnected leads so that they can be reconnected to their correct terminals when you
reassemble the instrument.
WARNING: Removing the instrument covers or removing parts, except those to which
access can be gained by hand, is likely to expose live parts and accessible
terminals may be live. To avoid electric shock, disconnect the instrument from
all voltage sources and remove batteries before disassembling the instrument.
If any adjustment, maintenance, or repair of the disassembled instrument under
voltage is required, it shall be carried out only by qualified personnel using
customary precautions against electric shock. Capacitors inside the instrument
can hold their charge even if the instrument has been separated from all voltage
sources and batteries have been removed.
6.2
DISASSEMBLY PROCEDURES
The following sections describe the disassembly process of the ScopeMeter in sequence (from fully
assembled instrument to separate printed circuit boards and chassis parts). Start and end
disassembly at the appropriate heading levels.
WARNING: To avoid electric shock, disconnect test leads, probes and power supply from
any live source and from the ScopeMeter itself.