Kenwood DPX501 Service Manual page 15

Initializing AUDIO-related value setting
During STANDBY sourcing, by pressing [
1 second, AUDIO setting values are returned to the default
values.
Other
• At Power ON, "CODE_OFF", "CODE_ON" displays will not
be made.
• When the source is STANDBY, press [AUTO] / [TI] key briefly
to switch triangle illumi RED ↔ GREEN. (In models with
Display Blackout function)
• When the source is STANDBY, press and hold [AUTO] /
[TI] key for 1 second to switch PREOUT Rear ↔ Sub Woofer.
(2PREOUT model)
• When in USB source, press [1] key briefly to turn ON/OFF
the front grass indirect lighting.
• When staring up in the test mode, LINE MUTE prohibition
time is set to 1 second instead of 10 seconds.
• While in the test mode, security jig should not be used to
write the security code.
• While in the test mode, serial writing jig should not be used
to write the serial number.
• While in the test mode, even when a DC offset error is de-
tected, the detection information will not be written to the
E2PROM.
• While in the test mode, even after an elapse of pre-set time,
the backup memory items will not be written to the E2PROM.
• While in the test mode, backup/installer memory informa-
tion clear mode, CD mechanism error log information clear
mode and DC offset error detection information clear mode,
DEMO mode operation will not be conducted.
Also, in the above mode, the menu of the STANDBY source
will not display DEMO ON/OFF switching items.
Clearing backup/installer memory and CD mecha-
nism information, and service information (Clear-
ing E2PROM data)
Backup/installer memory X34-IC10 (E2PROM) "AU_"
CD mechanism information and service information: TUNER
F/E (E2PROM) "CD_"
1. While pressing and holding the [Q] key and the [ATT] key,
reset-start to start backup/installer memory data, and CD
mechanism and service information initialization.
(Even when the security is set, power can be ON for 30
minutes.)
TEST MODE
[CD mechanism information]
• Displays I2C communication condition
] key for less than
• Displays CD mechanism error log
• Displays CD loading error data.
• Displays CD ejection error data.
• Displays CD time code error count data (missing count).
• Displays CD time code error count data (count not up-
[Service Information]
• Displays power ON time is displayed.
• Displays CD operation time.
• Displays number of CD EJECT times.
• Displays number of times panel was opened/closed.
• Displays forced Power OFF data.
2. After the initialization process is completed, the following is
displayed.
At normal termination: "CD_O : AU_O_"
At abnormal termination 1: "CD_O : AU_X_" (When backup/
installer memory initialization is NG.)
At abnormal termination 2: "CD_X : AU_O_" (When CD
mechanism information / service information initialization
NG.)
At abnormal termination 3: "CD_X : AU_X_" (When all ini-
tialization NG.)
3. While in this mode, even after an elapse of a pre-set time,
no backup memory items will be written to the E2PROM.
4. This mode is released by resetting. (What was on the last
screen will not be retained.)
Clearing DC offset error detection information
(E2PROM (F/E) data clear)
1. While simultaneously pressing down on [3] and [6] keys,
reset the unit to enter the DC offset error display mode.
(Even when the security is set, power can be ON for 30
minutes.)
2. During STANDBY sourcing, the current DC offset error con-
ditions will be displayed.
When error detected : "DC_ERR__"
When error not detected : "DC_OK___"
3. While the error conditions are being displayed, press [AUTO]
/ [TI] key for less than 1 second to clear the detection infor-
mation. (E2PROM clear)
4. DC offset error display mode is released by resetting. (What
was on the last screen will not be retained.)
DPX501/501U/501UY
DPX-MP2090U
dated).
15