Diagnosis Function - Sony CDX-GT420U Service Manual

Description of the Diagnostics function:
1. Setting the Diag display mode
With the power off, press the [4] button, [5] button, and [4]
button on the set body or the remote control (for more than 2
seconds) in turn.
2. Canceling the Diag display mode
During the Diag function mode, press the [OFF] button.
3. Initial display in the Diag display mode.
Just when the Diag mode is entered, "reset count" is displayed.
The display mode is switched by each rotation of [
SEEK +] or [ SEEK –] keys.
. m/
Reset count display
Reset count by watchdog timer display
Number of connected units display
Operating hours display
CD error information display
OFFSET/FAILURE error display
USB error information display
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
SECTION 4

DIAGNOSIS FUNCTION

4. Contents of each display mode
4-1. Reset count display mode
Diag code
01: Reset count
4-2. Reset count by watchdog timer display mode
M >/
Diag code
02: Number of resets by watchdog timer
4-3. Number of connected units display mode
Diag code
03: Number of connected unit.
The display mode is switched by each rotation of [2/ALBM+] or
[1/ALBM–] keys during the number of connected units display
mode.
4-4. Operating hours display mode
Diag code
04: Operating hours
Reset count
(in hexadecimal format)
Reset count
(in hexadecimal format)
Show the number of connected units for
CD-C, MD-C and XM respectively from
the rightmost (in hexadecimal format).
Recency of information
1-3: 1 represents the latest.
No. of connected units history 1 (latest) display
No. of connected units history 2 display
No. of connected units history 3 display
Operating hours
(in hexadecimal format)
19