LG DM2740 – How to upgrade the firmware, system reset, amplifier and MICOM schematic - DVD Micro Hi-Fi system
LG
DM2740 (DM2740, CMS2730F) DVD Micro Hi-Fi System - Signal system: Standard NTSC
color TV system
Stereo
mode: 80 W + 80 W (4Ω at 1kHz)
The
pick-up incorporates a strong magnet, and so should never be brought close to
magnetic materials.
✓The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.
✓Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.
✓Laser beams may damage the eyes. Never permit laser beams to enter the eyes.
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
✓The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.
✓Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.
✓Laser beams may damage the eyes. Never permit laser beams to enter the eyes.
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
✓ NEVER
look directly at the laser beam, and don’t allow contact with fingers or other
exposed skin.
✓Never
attempt to disassemble the pick-up.
Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.
(Do not use any other liquid cleaners, because they will damage the lens.)
Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.
(Do not use any other liquid cleaners, because they will damage the lens.)
✓Take
care not to use too much of this alcohol on the swab, and do not allow the
alcohol to get inside the pick-up.
FIRMWARE UPGRADE
MPEG
1) Copy firmware to USB (Do not change file name).
Ex) LG_DM2740LD1_1403190.rom
2) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
3) Inset USB device which includes firmware.
4) Firmware is detected automatically and then, shows blue screen in TV. If home menu is maintained after inserting USB, press music Icon.
5) Take off the USB and press PLAY key.
6) and then, upgrading is started. Do not turn off the set until upgrade is finished.
7) After finishing firmware upgrading, set will restart automatically.
8) Power off and on again by pressing POWER key.
1) Copy firmware to USB (Do not change file name).
Ex) LG_DM2740LD1_1403190.rom
2) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
3) Inset USB device which includes firmware.
4) Firmware is detected automatically and then, shows blue screen in TV. If home menu is maintained after inserting USB, press music Icon.
5) Take off the USB and press PLAY key.
6) and then, upgrading is started. Do not turn off the set until upgrade is finished.
7) After finishing firmware upgrading, set will restart automatically.
8) Power off and on again by pressing POWER key.
AUDIO MICOM
1) Copy firmware to USB (Do not change file name).
Ex) DM2740_1403250.HEX
2) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
3) Inset USB device which includes firmware.
4) Firmware is detected automatically and then, shows blue screen in TV.
If home menu is maintained after inserting USB, press music Icon.
5) Upgrading is started.
Do not turn off the set until upgrade is finished.
Do not pull out the USB device using firmware upgrading.
6) After finishing firmware upgrading, set will be turned off.
1) Copy firmware to USB (Do not change file name).
Ex) DM2740_1403250.HEX
2) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
3) Inset USB device which includes firmware.
4) Firmware is detected automatically and then, shows blue screen in TV.
If home menu is maintained after inserting USB, press music Icon.
5) Upgrading is started.
Do not turn off the set until upgrade is finished.
Do not pull out the USB device using firmware upgrading.
6) After finishing firmware upgrading, set will be turned off.
TOUCH
1) Copy firmware to USB (Do not change file name).
Ex) DM2740T_1402040.dld / TC390_LG_CMDM2740_140204_0.hex
2) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
3) Inset USB device which includes firmware.
4) Firmware is detected automatically and then, shows blue screen in TV. If Home menu is maintained after inserting USB, press music Icon.
5) Upgrading is started.
✓Do not turn off the set until upgrade is finished.
✓Do not pull out the USB device using firmware upgrading.
6) After finishing firmware upgrading, set will be turned off.
1) Copy firmware to USB (Do not change file name).
Ex) DM2740T_1402040.dld / TC390_LG_CMDM2740_140204_0.hex
2) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
3) Inset USB device which includes firmware.
4) Firmware is detected automatically and then, shows blue screen in TV. If Home menu is maintained after inserting USB, press music Icon.
5) Upgrading is started.
✓Do not turn off the set until upgrade is finished.
✓Do not pull out the USB device using firmware upgrading.
6) After finishing firmware upgrading, set will be turned off.
EEPROM OPTION SETTING
1) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
Do not insert disc or USB at the set.
2) Press "PAUSE 1 4 7 2" in order.
3) and then, option setting menu is displayed.
You can see 10 bytes option value.
Ex ) F9 00 C1 D4 00 11 90 10 E0 08
4) Move a cursor by pressing Arrow </> key.
5) Press Num key what you want to change.
6) Press "PAUSE" key to exit option setting menu.
After change option value, you need to make system reset.
2) Press "PAUSE 1 4 7 2" in order.
3) and then, option setting menu is displayed.
You can see 10 bytes option value.
Ex ) F9 00 C1 D4 00 11 90 10 E0 08
4) Move a cursor by pressing Arrow </> key.
5) Press Num key what you want to change.
6) Press "PAUSE" key to exit option setting menu.
After change option value, you need to make system reset.
Power AMP schematic
MICOM schematic
SMPS schematic
SYSTEM RESET
1) Change function to DVD/CD by pressing input key, and wait until home menu is shown.
Do not insert disc or USB at the set.
2) Go to SETUP menu by pressing SETUP button in HOME menu.
3) Move highlight at "DISPLAY ==> TV Aspect ==>16:9".
4) Press "1 3 9 7 1 3 9 Enter" in order.
5) And then, system reset menu is displayed.
6) Power off and on by pressing POWER key.
Do not insert disc or USB at the set.
2) Go to SETUP menu by pressing SETUP button in HOME menu.
3) Move highlight at "DISPLAY ==> TV Aspect ==>16:9".
4) Press "1 3 9 7 1 3 9 Enter" in order.
5) And then, system reset menu is displayed.
6) Power off and on by pressing POWER key.
