15
DPX301
DPX-MP2090/MP2090S
TEST MODE
●
Clearing DC error detection data
(E2PROM (F/E) data clearing)
1. Press and hold [3] and [6] keys and reset-start to go into
the DC offset error display mode.
(While “– – – –“ is being displayed, power can be ON for 30
minutes.)
2. While in STANDBY source, the current DC offset error con-
dition is displayed.
When detected: “DC_ERR_ _"
When not detected: “DC_OK_ _ _"
3. While error condition is being displayed, press [AUTO] key
briefly to clear the detection data. (clear E2PROM)
4. DC error display mode is cancelled by resetting. (The last
screen will not be retained.)
●
Frequency span switching (K/M type)
While pressing and holding [1] and [5] keys, press [SRC]
key simultaneously to power ON.
●
Security
• Forced Power-ON mode (all models)
Even when security is permitted, by pressing and holding
[Q] and [4] keys and pressing RESET simultaneously, power
can be ON for 30 minutes. After 30 minutes, recovered only
by reset.
• Simplified security code clearing procedure (simplified se-
curity model)
1. While code is requested, press and hold [AUTO] key and
press [
] key for 3 seconds. (“– – – –” disappears.)
2. Enter “KCAR” by remote control.
Press the remote control [5] key 2 times, display “K”,
and press the [
] key.
Press the remote control [2] key 3 times, display “C”,
and press the [
] key.
Press the remote control [2] key once, display “A”, and
press the [
] key.
Press the remote control [7] key 2 times, display “R”,
and press the [
] key.
3. Security is cleared and the source is set to STANDBY.
4. If a wrong code is entered, code request mode is dis-
played.
●
Purpose
Prevent customers’ vehicle speakers damages, burnouts,
and smoking.
Avoid the connected speakers to be burned out, damaged,
or to smoke when DC occurs between the audio power amp.
+ and - outputs.
●
Processing after detection
1. System status
• At the detection of DC error, error data is to be saved im-
mediately (E2PROM error log save area).
• Display the error message on the display. The system shall
maintain the current condition, including the operation. Shut
down audio system power supply. Set Mute to ON.
• Although switching between Power OFF and ON (ACC, BU,
and Key operation) is valid, switching from Off to ON shall
be error until the
µ
-com is reset.
∗
While power-on, even if the IC2VI DCErr output terminal
logic recovered to normal level value, the error condition
shall continue.
• Prohibit to save the backup/installer memory to E2PROM
(nonvolatile memory).
2. Controlling
µ
-com terminal
• Set Mute for all channels including for pre-out.
• Turn off power IC control system power supply. (Set AMP-
Standby function to valid)
• Set P-Con output to OFF (Logic by which external AMP
unit is turned off).
∗
The purpose is to shut down audio output. Basically, the
logic sets the audio output system signal line when in
Standby source.
DC OFFSET ERROR
