Kenwood KRC-709 Service Manual page 9

• Method of writing the Mask key while the EEP-
ROM is in the initial status
1. Enter the test mode. (See 1 How to enter the test mode)
2. Press the CLK key to enter the Mask key registration
mode. "TRANSMIT1" should be displayed now. The
display at this time should show "< >" in place of "[ ]".
3. Point the Mask key remote toward the light sensor, and
press and hold its key for more than 0.5 second.
4. When "TRANSMIT2" is displayed, press and hold the
key on the Mask key remote for more than 0.5 second
again. The first and second counter codes are not com-
pared at this time.
5. When "APPROVED" is displayed, the write operation is
complete. Now the demonstration mode is initiated and
the test mode is terminated.
(Note) In the same way as previous models, if 30 min-
utes have elapsed with no code written, an error occurs
and the power is turned OFF.
• Method of initializing the Mask key (How to reset
the unit from the Mask key approved condition
to the factory condition)
1. Enter the test mode. (See 1 How to enter the test
mode)
2. "TRANSMIT1" is displayed and the Mask key entry
request mode is initiated.
The display at this time should show "✽ ✽" in place of "[ ]".
3. Press and hold the key on the Master key remote for
more than 3 seconds.
4. When "TRANSMIT2" is displayed, press and hold the
key on the Master key remote for more than 3 seconds.
5. When "APPROVED" is displayed, the Mask key is
cleared, the demonstration mode is initiated, the test
mode is terminated and the unit returns to the factory
condition.
• Method of clearing all Mask key-related data
1. Enter the test mode. (See 1 How to enter the test
mode)
2. Press the CLK key to enter the Mask key registration
mode. "TRANSMIT1" should be displayed now.
3. Point the Master key remote toward the light sensor,
and press and hold its key for more than 3 seconds
(until the level display shows the full condition).
4. When "TRANSMIT2" is displayed, hold the key on the
Mask key remote for more than 3 seconds again.
If "TRANSMIT1" is displayed in place of "TRANSMIT2",
restart the procedure from step 3.
5. When "APPROVED" is displayed, all security data is
cleared and the unit returns to the condition before
Mask key writing with the EEPROM in the initial status.
KRC-709,779R/RY,889
TEST MODE
9