JVC KD-ADV6270J Service Manual page 27

4.6 Service mode
4.6.1 Standard input/output conditions
Power supply voltage DC14.4V(11 to 16V)
Load impedance 4Ω(2 Speakers connection)
Line Output 20KΩ
4.6.2 Service mode setting procedure
(The DVD does not need to be loaded before starting the following procedure.)
[SOURCE] button
[STANDBY/ON ATTENUATOR] button
(1) Press a [STANDBY/ON ATTENUATOR] button on a main unit and switch it on.
(2) Keep this state more than 2 seconds while continuing pressing the [SEL] button, [STANDBY/ON ATTENUATOR] button and
[SOURCE] button sequentially.
(3) This unit is set by a service mode.
*Exchanging it operate a menu of a service mode with the [DISC UP] button and [DISC DOWN] button.
Operate choice of a menu with a [SEL] button.
4.6.3 Operation procedures
Keep this state more than 2 seconds while
continuing pressing the [SEL] button,
[STANDBY/ON ATTENUATOR] button and
[SOURCE] button sequentially.
The unit enters the service mode.
"INIT ALL" is
indicated on the LCD.
"VERSION" is
indicated on the LCD.
"AREA/RGN" is
indicated on the LCD.
A B
[SEL] button
Press the [SEL] key Initialize all data to the factory setting
:The system control EEPROM is
initialized entirely.
Press the [SEL] key Microcomputer version display
S-XXX-YY
DVD-XXXX
USB-XXXX
*Exchanging it operate each indication with the
[DISC UP] button and [DISC DOWN] button.
Press the [SEL] key Destination area/region display
STS-X XX
DVD-X XX
DVDRGN X
*Exchanging it operate each indication with the
[DISC UP] button and [DISC DOWN] button.
[DISC UP] button
[DISC DOWN] button
System control CPU
version/ROM correction version
DVD version
USB version
System control destination
DVD unit destination
DVD unit region
(No.MA250)1-27