Support Strategies; Unit Exchange; Bench Repair - Philips M3921A Service Manual

Support Strategies

Support Strategies

Unit exchange

Bench repair

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This section provides a summary of how the monitor was designed to be
supported and how Philips provides that support.
There are two main methods of repairing the monitor:
• Unit exchange
• Bench repair
The primary repair method used by Philips service personnel is unit exchange.
The current design of the monitor requires testing if the case is opened.
The secondary repair method is bench repair. Special tools are required and
are listed in Chapter 3 under the section "Equipment Needed". If the case is
opened, specific tests must be performed. These tests are listed in detail along
with the Test Map in Chapter 3.
At the Philips parts center, we will stock the board level assemblies and
mechanical parts based on existing failure data and customer demand. These
parts are listed in Chapter 7. The availability of the spare parts will be notified
by service notes, as soon as they are set up at our parts center.
The troubleshooting guide in Chapter 5 is sufficient for assembly level bench
repairs. Before a repair is performed, consider whether a repair or a
replacement is most suitable. The main PCB for the monitor is only slightly
less expensive than an exchange device. Therefore, if troubleshooting
indicates that the fault lies in the main PCB, it is highly recommended that an
exchange unit is ordered and the defective returned. Not only does this save
time and effort, but it is also a more cost-effective solution.
Chapter 10 - Training Program