Panasonic KX-FPC135 Service Manual page 78

KX-FPC135 / KX-FPC141
FLASH MEMORY (IC510) (KX-FPC141 only)
If the unit is working correctly but the VOICE GUIDANCE (voice prompt) is not audible, you should check the Flash Memory.
A voice message is pre-recorded in the Flash Memory (IC510). So, when you find an IC510 malfunction and replace it with a
new one. You have to pre-record the voice message by using a special ROM.
How to Use the Special ROM
(Voice Message Recording ROM)
1. Turn the AC power OFF.
2. Replace the regular system ROM with the special ROM.
3. Turn the AC power ON.
4. The Voice Message Recording starts automatically.
5. Turn the AC power OFF.
6. Replace the special ROM with the regular system ROM.
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