How to enter service mode – LG CM9730 – Software update – Exploded view

HIDDEN KEY MODE

Push both Front key and RCU key to activate it for 5 seconds.

1. Disc Lock On/Off (CD Function Only Active)
„ Front Key : STOP
„ RCU Key : STOP
2. Check Version and Option code
„ Front Key : STOP
„ RCU Key : PLAY/PAUSE
„ You can change [Audio MCU Version <=> CD Controller Version <=> EEPROM Option] by SKIP [+/-].

3. Clear EEPROM
„ Front Key : STOP
„ RCU Key : SKIP-
4. Edit EEPROM
„ Front Key : STOP
„ RCU Key : SKIP+
„ You can change the digit option by SKIP +/-.
„ You can edit 0~f by REPEAT or PLAY/PAUSE key.
5. Bluetooth DUT
„ Front Key : STOP
„ RCU Key : PROGRAM
„ Bluetooth model only
6. Power Disc Lock On/Off (CD Function Only Active)
„ Front Key : STOP
„ RCU Key : EQ
7. Amp Clip On/Off
„ Front Key : STOP
„ RCU Key : Mute
Amp Clip Mode Change (Amp Clip On --> Amp Clip Off --> Level Down display)
8. Demo ALL Key Lock (CM9520/CM8520 Only)
„ Front Key : STOP
„ RCU Key : 9
Demo All Key Lock Change (All Key Lock On --> All Key Lock Off)
> Working on Demo Operation only
> When All Key Lock, Volume Key work only
> After All Key Lock Off, it can unlock Demo Mode.

Exploded View [Click on the pictures to zoom in]

PROGRAM UPGRADE

1. Check the download file name.

[File Name Micom:CM9730_”version”.  Mpeg: HEX HE004_”version”.BIN EQ:EQ_PRG.BIN]

There is the Update File only in the USB storage.
2. Copy the download file to the USB storage.
3. Insert the USB storage on USB1 or USB2 Function.
4. VFD Display
1) MICOM : “WRITE XX”
2) Mpeg : “FIRMWARE”
3) EQ : “EQ DOWN”
5. Complete Update
1) When the Set is turned off automatically after display "UPDATED", remove the USB storage.
2) Unplugged the power cord after display "FINISHED", then remove the USB storage.

Upgrade required time
Upgrade required time is determined depending on the Writing time considering the Download stability.

[Upgrade time. MICOM: about 60sec. Mpeg: about 15sec. Eq: about 5sec]