Kenwood KDC-V7521/Y Service Manual

Contents

11. Other specifications• Automatic panel closing when a CD is inserted is inhib-ited. (M&T model)• Panel operation by turning power OFF/ON is inhibited.(M&T model)• Messages such as “CODE OFF” are not displayed whenpower is turned ON.• Pressing the ATT key opens or closes the panel. (M&Tmodel)• Pressing the TI (AUTO) key during changer operation turns2zone ON. 2zone can be turned OFF by pressing the TI(AUTO) key again. The P/S dot lights while 2zone is ON.• Pressing and holding the CLK key for a second in the ALLOFF status the Mask Key (security) write mode.• Security-related information1. Forced Power ON mode (All models)Even when the security (Mask key) is approved, resettingthe unit while holding the ATT and Preset 4 keys makes itpossible to turn the power ON for 30 minutes.After 30 minutes have elapsed, it is not possible to returnto the previous condition unless the unit is reset again.2. Method of registration of the security code afterEEPROM (Tuner Unit Ass'y) replacement (Codesecurity model)1) Enter the test mode. (See 1. How to enter the test mode)2) Press the CLK key to enter the security registrationmode.3) Enter the code using the Preset 1/2/3/4 keys.Example : To enter “3510”• Press the Preset 1 key 4 times.• Press the Preset 2 key 6 times.• Press the Preset 3 key twice.• Press the Preset 4 key once.4) Hold down the DISP key for at least 3 seconds and themessage, “RE-ENTER” appears, so once again enterthe code according to step 3) above.5) Press and hold the DISP key for 3 seconds until “AP-PROVED” is displayed.6) Exit from the test mode. (See 2. How to exit from thetest mode)(Note) All Clear is not applicable to the security code ofthis model.3. Method of writing the Mask key while theEEPROM is in the initial status1) Enter the test mode. (See 1. How to enter the test mode)2) Press the CLK key to enter the Mask key registrationmode. “TRANSMIT1” should be displayed now. The dis-play at this time should show “< >” in place of “ [ ] ”.3) Point the Mask key remote toward the light sensor, andpress and hold its key for more than 0.5 second.4) When “TRANSMIT2” is displayed, press and hold thekey on the Mask key remote for more than 0.5 secondagain. The first and second counter codes are not com-pared at this time.5) When “APPROVED” is displayed, the write operation iscomplete. Now the demonstration mode is initiated andthe test mode is terminated.(Note) In the same way as previous models, if 30 minuteshave elapsed with no code written, an error occursand the power is turned OFF.4. Method of initializing the Mask key (How toreset the unit from the Mask key approvedcondition 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 re-quest mode is initiated. The display at this time shouldshow “ ✽ ✽ ” in place of “ [ ] ”.3) Press and hold the key on the Master key remote formore than 3 seconds.4) When “TRANSMIT2” is displayed, press and hold thekey on the Master key remote for more than 3 secondsagain.5) When “APPROVED” is displayed, the Mask key iscleared, the demonstration mode is initiated, the testmode is terminated and the unit returns to the factorycondition.5. Method of clearing all Mask key-related data1) Enter the test mode. (See 1. How to enter the test mode)2) Press the CLK key to enter the Mask key registrationmode. “TRANSMIT1” should be displayed now.3) Point the Master key remote toward the light sensor, andpress and hold its key for more than 3 seconds (until thelevel display shows the full condition).4) When “TRANSMIT2” is displayed, hold the key on theMask 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 iscleared and the unit returns to the condition before Maskkey writing with the EEPROM in the initial status.9KDC-V7521/YTEST MODE