Servicing Notes - Sony SPP-A2770 Service Manual

IF AN ERROR MESSAGE IS DISPLAYED (Handset)
If the following error message is displayed after the power was turned on, check the items where "1" is indicated.
[] [][]
ERROR= 000 00
• Note on Replacing The EEPROM
After the EEPROM was replaced, write various parameters in the "TEST MODE E" (see page 16). (For the ID, see "Writing ID Numbers"
described below)
Note: Replacing the EEPROM causes all data such as customer registered telephone directory to be cleared.
RE-REGISTERING ALREADY REGISTERED SET
Initialize the registered information on base unit and all handsets, and then register again all handsets starting with handset 1 by the
method given below. When re-registering the handset, refer to "Registering additional cordless handsets" in the instruction manual. (see
page 8)
– Base unit –
1. Turn the power on.
[1] [EZ ACCESS]
2. Press three keys of ,
– Handset –
1. Turn the power on.
[1] [EZ ACCESS]
2. Press three keys of ,
WRITING ID NUMBERS (for additional handsets)
The ID numbers are given in decimal notation on the bottom of base unit. If handsets are added, ID can be written in the TEST mode, but
the TEST mode handles ID numbers in hexadecimal notation, thus requiring decimal numbers to be converted into hexadecimal numbers.
Accordingly, when adding the handsets, refer to "Registering additional cordless handsets" in the instruction manual. (see page 8)
However, if the EEPROM was replaced, the handsets cannot be registered by the method mentioned above. In such a case, enter various
parameters except ID numbers in the "TEST MODE E", and then register the handsets by the method given in the instruction manual.
Also, the ID numbers can be written in the "TEST MODE B"(decimal number) (base unit: see page 14, handset: see page 16).
SECTION 1

SERVICING NOTES

EEPROM (IC122) data error t Write correct data to the EEPROM.
ID error
EEPROM (IC122) error
[INTERCOM]
, and
[INTERCOM]
, and
t Write correct ID data.
t Check the EEPROM and its peripheral circuits.
simultaneously to set the test mode.
simultaneously.
SPP-A2770
3