The multi control knob no loner access's the Audio or Function command when pushed in. Instead it does a double "beep" when pushed up, down, left or right so eg, pushing right, advances the track then accesses Function when it springs back. Is this a fault or have I set somehting wrong?

To set the clock, please follow the following steps

#1
Press and hold the "SRC/OFF" button on your Pioneer car CD player until the unit powers down. Note that the "SRC/OFF" button is located on the top left of the Pioneer car CD player.
#2
Press and hold the multi-control knob, located on the left side of the CD player. Hold the multi-control knob until the words "Clock Set" appear on the CD player's display.
#3
Turn the multi-control knob until the words "Clock Set" are highlighted. Press the multi-control knob on your Pioneer car CD player to enter the clock setting mode.
#4
Turn the multi-control knob to highlight the "Hours" option. Press and hold the multi-control knob until the hours-place digits begin to flash. Rotate the multi-control knob until the desired value is displayed. Press the multi-control knob on your Pioneer car CD player to save your changes.
#5
Turn the multi-control knob to highlight the "Minutes" option. Hold the multi-control knob until the minutes-place digits begin to flash. Rotate the multi-control knob until the desired minutes value is displayed. Press the multi-control knob to save your changes and end the clock-setting process.

Hope this might help
Thanks

The setup Security Code can be done when the
<Demonstration mode Setting> (page 50) is set as OFF.
• When the Security Code function is activated, the code
can’t be changed and the function can’t be released.
Note, the Security Code can be set as the 4 digit number
of your choice.
1 Enter Standby
Press the [SRC] button.
Select the "STANDBY" display.
2 Enter Menu mode
Press the [MENU] button for at least 1 second.
When "Menu" is displayed, "Security" is displayed.
3 Enter Security Code mode
Press the Control knob for at least 1 second.
When "Enter" is displayed, "Security" is displayed.
4 Select the digits to enter
Push the Control knob to [4] or [¢].
5 Select the Security Code numbers
Push the Control knob to [FM] or [AM].
6 Repeat steps 4 and 5, and complete the
Security Code.
7 Confirm the Security Code
Press the Control knob for at least 3 seconds.
When "Re-Enter" is displayed, "Security" is
displayed.
8 Do the step 4 through 7 operation, and
reenter the Security Code.
"Approved" is displayed.
The Security Code function activates.
• When the wrong Code is entered in steps 4 through 6,
repeat from step 4.
Press the Reset button and when it’s removed
from the battery power source
1 Turn the power ON.
2 Do the step 4 through 7 operation, and enter
the Security Code.
"Approved" is displayed.
The unit can be used.
In Standby mode
Touch Sensor Tone
Setting the operation check sound (beep sound)
ON/OFF.
Display Setting
"Beep : ON" Beep is heard.
"Beep : OFF" Beep canceled.
In Standby mode
Manual Clock Adjustment
• This adjustment can be done when the <Synchronize
Clock> (page 43) is set as OFF.
1 Select Clock Adjustment mode
Push the Control knob to [FM] or [AM].
Select the "Clock Adjust" display.
2 Enter Clock Adjust mode
Press the Control knob for at least 1 second.
The clock display blinks.
3 Adjust the hours
Push the Control knob to [FM] or [AM].
Adjust the minutes
Push the Control knob to [4] or [¢].
4 Exit Clock adjustment mode
Press the [MENU] button.
The Whole manual is here.
http://www.kenwood.net-disp.com/i/05products/kdc_x789/pdf/kdc_x889_x789_mp828_k_english.pdf

Reset process should be listed in the owners manual.

Should be something like turn car to on(not running) press trip button twice, turn to off and hold trip button till it resets.

1 Use the MULTI-CONTROL to select clock.Clock appears in the display. 2 Push multi-control left or right to select the segment of the clock display you wish to set 3 push multi-control up or down to set the clock pushing the multi-control will increase the selected hour or minute. Pushing down will decrease the selected hour or minute.

Hit the 'fnc' button (function) turn the control knob until you see clock adjust in the display. Press and hold the control knob until the time display blinks. To select what you want to adjust push the control knob to the right or left to select minutes hours. Push the knob up or down to make the adjustments. Exit the clock adjust function by pressing the 'fnc' button again. Here's a link to your owners manual for future problems. Have a great day and thanks for using fixya!

http://inform3.kenwoodusa.com/Manuals/kdcx592.pdf

Press source and hold until unit turnes off.press and hold the multi-control until language apears.select language by pushing in on multi-control. turn knob to select clock.push left or right to select hour or minute, then up or down to change.

From the manual:

Setting the clock
Use these instructions to set the clock.

1. Use the MULTI-CONTROL to select Clock.
"Clock" appears in the display.

2. Pushing MULTI-CONTROL left or right will select one segment of the clock display.
Hour -- Minute
As you select segments of the clock display the segment selected will blink.

3. Push MULTI-CONTROL up or down the set the clock.
Pushing MULTI-CONTROL up will increase the selected hour or minute.
Pushing MULTI-CONTROL down will decrease the selected hour or minute.

FYI: The "MULTI-CONTROL" button is the center of the volume knob.

Hope this helps you out.
--Matt

You have to be in " Standby" mode

1. Select Clock Adjustment mode: Push the Control knob to [FM] or [AM]. Select the "CLK ADJ" display.
2. Enter Clock Adjust mode: Press the Control knob for at least 2 seconds. The clock display blinks.
3. Adjust the hours: Push the Control knob to [FM] or [AM].
4. Adjust the minutes: Push the Control knob to |<< or >>|.
   
5. Exit Clock adjustment mode: Press the Control knob.

If you have any more questions, just come back here and leave a comment - I'm happy to help.

Use MULTI-CONTROL to select click.Clock appears is the display.
Pushing MULTI-CONTROL left or right will select one segment of the clcock display: Hour - Minute
As you select segments of the clock display the segment selected will blink.
Pushing MULTI-CONTROL up will increase the selected hour or minute,down will decrease the hour or minute

If your volume knob does nothing, then odds are your speaker outputs are blown. I would double check the setup menu to see if it has an internal amp shutoff, but I think only Alpines have this..
To access the menu, please do the following:
Press and Hold the "source" button until unit turns off.
Press and hold down the "multi-control" knob until the "language select" display appears.
Rotate the "multi-control" knob until you see something like "internal amp" or aything that looks like it would shut off the speaker outputs.....

Again, i don't think Pioneers have this, so odds are your aplifier chip is blown.