KENWOOD Z828
Service Manual

KDC-Z828,Z828
TEST MODE
System Microcomputer Test Mode
(1) How to enter the test mode While holding the EQ and ATT keys with All OFF, press the SRC key. (2) How to exit from the test mode Reset the unit. (Note) The test mode cannot be terminated by Acc OFF, power OFF or momentary power down. (3) Initial condition in the test mode 7Source: All OFF. 7Display: All ON. 7Volume: -10 dB (displayed as "30"). 7LOUD: OFF. 7CRSC: OFF regardless of whether or not the switching function is provided. 7SYSTEM Q: Flat. (4) Special display in TUNER mode If any of the following messages are displayed in TUNER mode, the front end or other part may be abnormal. 7"TNE2P NG": The EEPROM remains in the initial value (undefined values) because the F/E was shipped without passing the adjustment process, etc. 7"TNCON NG": Communication with the F/E is not available. (5) CD receiver test mode specifications 7Forced ejection at reset start is inhibited. The CD is not recognized when the set is reset with the CD loaded in it. 7Pressing the Track Up key jumps to the following tracks in cycle: No. 9.No. 15 .No. 10.No. 11.No. 12.No. 13.No. 14.No. 9 (return to the beginning) 7Pressing the Track Down key jumps to the previous track to the track being played. (6) Audio specifications 7A short press (tapping) of the Q key initiates the audio adjustment mode. 7Pressing the � key on the remote initiates the audio adjustment mode. 7Successive press of the remote key is inhibited. 7Bass, Middle and Treble can be adjusted in 3 steps of MIN, Center and MAX with the Track Up/Down keys. 7Balance can be adjusted in 3 steps of Left MAX, Center and Right MAX with the Track Up/Down keys. 7Fader can be adjusted in 3 steps of Rear MAX, Center and Front MAX with the Track Up/Down keys. 7HPF can be adjusted in 2 steps of Through and 220 Hz with the Track Up/Down keys: 7LPF can be adjusted in 2 steps of Through and 120 Hz with the Track Up/Down keys. 7Bass F, Bass Q, Bass EXT, Middle F, Middle Q and Treble F are not dealt with in the audio adjustment mode. (7) Menu specifications 7Pressing the DNPP/SBF key on the remote initiates the Menu mode. 7Successive press of the remote key is inhibited. 7The calendar adjustment and calendar display switching is eliminated. (8) Back-Up current measurement 7When the set is reset with Acc OFF (when the Back-Up current is turned ON), the MUTE terminal goes OFF in 2 seconds instead of 15 seconds. 7When Acc is turned OFF in the test mode, the MUTE terminal goes OFF in 2 seconds instead of 15 seconds. The CD/MD mechanisms are not activated at this time. (9) Special display when display is All ON Pressing one of the PRESET keys while all display is ON in the All OFF mode displays the information as shown below. [PRESET1] Version display (8 digits, Month/Day/Hour/Minute) (Display) YS xxxxxxxx System microcomputer PAN xxxxxxx Panel microcomputer [PRESET2] Serial No. display (8 digits) (Note) The display is not compatible with MSG. (Display) SNo. xxxxxxxx [PRESET3] Short press: Display power ON time (The All OFF time is not counted.) Long press: Clear power ON time (Display) Pon Tim xxxxx Max. 65535 (hr) [PRESET4] Short press: Display CD/MD operating time Long press: Clear CD/MD operating time (Display) CD Time xxxxx (CD/R, MP3/R) MD Time xxxxx (MD/R) Max. 65535 (hr) [PRESET5] Short press: Display CD/MD ejection count Long press: Clear CD/ME ejection count (Display) Eje Tim xxxxx Max. 65535 (times) [PRESET6] Short press: Display open/close count Long press: Clear open/close count (Display) PnCnt xxxxxx Max. 655350 (times)

(10) Other 7Messages such as "CODE OFF" are not displayed at power ON. 7Pressing the TI (AUTO) key during the changer operation turns ON 2zone, which can be turned OFF also with the TI (AUTO) key. The P/S dot lights while 2zone is ON.

I Security specifications
7Forced power ON mode (All models) Even when the security mode is permitted, the power can be turned ON for only 30 minutes by pressing the SRC key while holding the ATT and PRESET 4 keys depressed. After 30 minutes have elapsed, the set can be restored only by resetting it. 7Method of security code registration after EEPROM (F/E) replacement (Code security models) 1. Enter the test mode. (See "(1) How to enter the test mode".) 2. Press the CLK key to enter the security registration mode. 3. Enter the code by pressing the PRESET 1/2/3/4 keys. Example: To enter "3510" 7Press the PRESET 1 key 4 times. 7Press the PRESET 2 key 6 times. 7Press the PRESET 3 key 2 times. 7Press the PRESET 4 key once. 4. Press and hold the DISP key for 3 seconds until "APPROVED" is displayed. 5. Exit from the test mode. (See "(2) How to exit from the test mode".) (Note) The security code of these models cannot be subjected to the All Clear operation. 7Method of clearing the simplified security code (K Type only) 1. While holding the DISP key during the code request mode, press and hold the VOL Up key for 3 seconds (until "----" disappears). 2. Enter "KCAR" from the remote. (Same as the 00 model) Press the "5" key on the remote 2 times then press the Track Up key. (This enters "K".) Press the "2" key on the remote 3 times then press the Track Up key. (This enters "C".) Press the "2" key on the remote once then press the Track Up key. (This enters "A".) Press the "7" key on the remote 2 times then press the Track Up key. (This enters "R".) 3. The security mode is exited and the set enters the All OFF mode. 4. If an erroneous code is entered, the set enters the code request mode again.

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