Philips SPENDEX 40 Maintenance Manual page 40

NATO CONFIDENTIAL
SPENDEX 40 UA 8251/00 AND /Ol
LIMITED MAINTENANCE MANUAL
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Keyboard/display test - fault finding table
Failure
Suspected module
- One or more display characters do
• Front panel
not function after the pressing of
• Connecting board
a certain key.
- One or more display characters do
• Front panel
not function continuously.
• Connecting board
- The LED does not function.
• Front panel
• Connecting board
- No tone is audible after the
• Telephony board
pressing of a certain key.
- No tone at all is audible.
• Telephony board
• Connecting board
• Front panel
• Handset
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NATO CONFIDENTIAL
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