Test Mode - Kenwood KDC-4022 Service Manual

1. How to enter the test mode
• While holding the preset 1 key and 3 keys, reset the unit.
2. How to exit from the test mode
• Reset the unit, ACC OFF, power OFF, and come off the
front panel assy for the unit.
3. Initial status in the test mode
• Sources : All OFF.
• Display : All segments were lit.
• Volume : -10 dB (displayed as 30)
• Loudness : OFF
• CRSC : OFF regardless of the presence of
switching function.
• SYSTEM Q : Flat.
• Aux : ON
• Display color : white (variable color display model only)
• Beep sound : ON
4. Special display in Tuner mode
When any of the following messages is displayed in Tuner
mode, the Front-end (F/E) may be bad condition.
• "TNE2P NG": The EEPROM is set to the default (unstable
values) because the F/E was shipped without passing
through the adjustment process, etc.
• "TNCON NG": Communication with the F/E to micro-
processor is not possible.
5. Forced switching of K3I
Each press of the Preset 6 key in Tuner mode should
switch K3I from AUTO Forced Wide
Forced Narrow AUTO. The initial status is AUTO and
the display shows these modes as follows.
• AUTO : FMA
• Forced Wide : FMW
• Forced Middle : FMM
• Forced Narrow : FMN
6. Test mode specifications of the CD receiver
• Forced ejection is inhibited in the reset start operation.
When the unit is reset while a CD is loaded in it, the CD is
not recognized by resetting.
• Each press of the Track Up key jumps to the following
track numbers:
No. 9 No. 15 No. 10
No. 22 No. 14 No. 9 (The cycle restarts from here.)
• Each press of the Track Down key jumps to the previous
track number to the track being played.

TEST MODE

Forced Middle
No. 11 No. 12 No. 13
KDC-4022/422/6023
• When the number of total tracks of an MP3 disc is nine or
less, unit playback from a track 1.
• When the media to CD-DA, unit playback from track No.28
by key operation of preset 1 key.
7. Audio-related specifications
• A short press of the Q key initiates the audio adjustment
mode.
• Pressing the key on the remote initiates the audio ad-
justment mode.
• Continuous holding of a remote control key is inhibited.
• Bass, Middle and Treble are adjusted in 3 steps of -8 / 0 /
+8 with the Track Up/down keys (default is 0).
• Balance is adjusted in 3 steps of Left L15 / 0 / R15 Max
with the Track Up/down keys (default is 0).
• Fader is adjusted in 3 steps of Rear15 / 0 / F15 Max with
the Track Up/down keys (default is 0).
• HPF is adjusted in 2 steps of Through/170Hz (or 200Hz)
with the Track Up/down keys (default is through).
• LPF is adjusted in 2 steps of Through/120Hz with the Track
Up/down keys (default is through).
• Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble
f are not dealt with by the audio adjustment.
8. Menu-related specifications
• A short press of the PLAY/PAUSE key initiates the Menu
mode.
• Pressing the DNPP key on the remote initiates the Menu
mode.
• Continuous holding of a remote control key is inhibited.
• Contrast is adjusted press of the Track up/down key in 3
steps of 0 / 5 / 10 (default is 5).
9. Backup current measurement
When the unit is reset while ACC is OFF (i.e. by turning
Backup ON), the MUTE terminal goes OFF in 2 seconds in
place of 15 second. (The CD mechanism is not activated at
this time.)
7