Sony SPP-A1070 - Caller Id Telephone, Service Manual

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9
SPP-A1070/A1071
3. Key Definition
[1]
key
Operation: Set combo to inactive mode.
Indication: CB=0
[2]
key
Operation: Set combo to RX mode.
Indication: CB=1
[3]
key
Operation: Set combo to active mode.
Indication: CB=2
[4]
key
Operation: Increment channel by 1.
Indication: CH=CH+1
[5]
key
Operation: Mute TX audio path.
Indication: TxM=1
[6]
key
Operation: Mute RX audio path.
Indication: RxM=1
[7]
key
Operation: Decrement channel by 1.
Indication: CH=CH–1
[8]
key
Operation: Mute TX audio path.
Indication: TxM=0
[9]
key
Operation: Mute RX audio path.
Indication: RxM=0
[0]
key
Operation: Start LCD segment test.
Indication: Various patterns shown on LCD for a few seconds.
[*]
key
Operation: Set combo to active mode.
Enable data transmission.
Indication: DA=1
[#]
key
Operation: Disable data transmission.
Indication: DA=0
[ONE TOUCH]
key
Operation: Switch to RSSI detection.
Indication: “
E ” icon turns off.
[REDIAL]
key
Operation: Switch to battery detection.
Indication: “
E ” icon turns on.
[OFF]
key
Operation: Release the test mode.
Note: All keys pressed will emit the key tone.
4. Data Link
Data bits are encoded in manchester format for which bit “0” is
represented by 500
µ
s high and 500
µ
s low while bit “1” by 500
µ
s low and 500
µ
s high.
If data transmission is enabled, it will transmit data packet with
the following fields continuously.
(“0”=500
µ
s low and “1”=500
µ
s high)
• 8 bit preamble :1010101010101010
• 8 bit word sync :1001101101101001
• 20 bit security code :Restored from EEPROM
• 4 bit reserved data
:10101010
• 8 bit command :1010101010101010
• 8 bit data :1010101010101010
No matter data transmission is enabled or not, it toggles the
“NEW” icon every time when a data packet is received. (No secu-
rity code would be checked)
Security Code Synchronization
The following procedures should be followed if the security codes
of both unit do not match to each other.
1. Put the handset into manual test mode, making sure the channel
is set at 14 (default) out of 0 to 29.
2. Press the
[*]
key to start data transmission under which the
SC_SYNC command is sent continuously.
3. Put the base unit into manual test mode.
4. Before the base unit enters the manual test mode, it waits one
second for receiving SC_SYNC command from the handset.
If the command is received in the period, its security code will
be saved into EEPROM and then flash the
[LINE]
LED for
indication.