LG MAX221UB Service Manual

1-7
FIRMWARE UPGRADE METHOD
[ MAIN AND CD FIRMWARE UPGRADE ]
1. Confi rmation of version information
• Change the Source of audio set to tuner. (Default: tuner)
• Turn power off using power key.
• Press power key for 5 s. (After power on, continue pressing)
• After 5 s, beep sound rings two times.
Then version information would show up at display.
• In order to check version of MAIN and CD system, Press band key.
2. Upgrade Program reading
• Insert update USB in ACC on state and then is displayed in order.
USB : [USB Check → MN(CD) DNLD?]
3. Upgrade start
• In order to start upgrade, Press Play/Pause Key until “CHECKING” Display on the LCD.
4. Upgrade progress display
• Upgrade is in progress now.
CD Download : [CHECKING → ERASE → WRITE → I-VRF → D-VRF]
MN Download : [CHECKING → WRITE → DOWN OK]
5. Upgrade Completion
• When Upgrade fi nished, the display shows up “DOWN OK”. After a while, the audio set is
reset automatically.
• Caution!
If power is off on the way of upgrading fi rmware, the set can’t be recovered.
Therefore pay lots of attention for power not to be off.

LG MAX221UB Specifications

General

Brand	LG
Model	MAX221UB
Category	Receiver
Language	English