DOWNLOAD LG 20HIZ12 (CHASSIS:ML-041F) Service Manual ↓ Size: 2.88 MB | Pages: 35 in PDF or view online for FREE

- 13 -

- Decide to change input source or not by setting 'Input Source Change' as Yes(Change possible) or No(Change

impossible).

- When 'Input Source Change' is set to No(Change impossible), TV/AV key and Multimedia key doesn't work, and entering

'Input' item in the 'Main Menu OSD' is impossible.

- When 'Input Source Change' is set to No(Change impossible), user's input (pressing Channel key, numeral key, List key,

Q.View key in all Input source except TV source) doesn't work and when entering 'Channel Menu' item in the 'Main Menu
OSD' except TV mode doesn't accepted. Because entering 'Channel Menu' item makes present mode as TV mode even
though present mode is not TV mode. for the function that turns to TV mode doesn't work.

- When 'Input Source Change' is set to Yes(Change possible), then changing input source is available.
- When 'Input Source Change' is set to No(Change Impossible), TV set always turns on fixed input source and volume

information regardless of already set channel information.

- When 'Input Source Change' is set to No(Change Impossible), entering 'Channel Menu' except TV mode doesn't possible

regardless of 'Channel Change' or 'Channel Menu Display' item.

- Decide to fix volume or not by setting 'Fixed Volume' as Yes(Change possible) or No(Change impossible).
- When 'Fixed Volume' is set to Yes(Set), it fixed present volume and volume key doesn't work.
- When 'Fixed Volume' is set to Yes(Set), volume doesn't change during 'Mute On' but release mute.
- When 'Fixed Volume' is set to No(Not Set), user can change volume.
- In the case of both 'Fixed Volume' and 'On Time' is set to Yes(Set), but just the value is different, then Fixed Volume value

has priority.

- When 'Fixed Volume' is set to Yes(Set), user cannot select 'Max Volume' item.
- When 'Fixed Volume' is set to Yes(Set), 'On Time' menu's Volume item fixed to present volume.

- Decide 'Max Volume' between changing range 0 ~ 100.
- When 'Max Volume' is set, user can change up to set volume value.
- In the case of 'Fixed Volume' is set to Yes, 'Max Volume' item cannot be selected.
- When 'Max Volume' is set, volume just goes up to the 'Max Volume' value in 'On Time Menu'.

- Decide to display OSD or not by setting 'OSD Display' as Yes(Mark) or No(No Mark).
- When 'OSD Display' is set to No(No Mark), just Channel OSD and STEREO OSD doesn't display.

- Decide to operate Remote Control or not by setting "Remocon Operation" as Yes(Work) or No(Do Not Work).
- When "Remocon Operation" is set to No(Do Not Work), all remocon key doesn't work include Power Key.
- When "Remocon Operation" is set to No(Do Not Work), In-start key and In-stop key still work.
- When "Remocon Operation" is set to No(Do Not Work), 'Remocon Operation' working in service mode is available.
- When "Remocon Operation" is set to Yes(Work), all Remocon keys work properly.

- Decide to operate 'Local Key' or not by setting "Local Key Operation" as Yes(Work) or No(Do Not Work).
- When 'Local Key Operation' is set to No(Do Not Work), all Local Key doesn't work include Power Key.
- When 'Local Key Operation' is set to No(Do Not Work), Local Key working in service mode is still available.
- When 'Local Key Operation' is set to Yes(Work), all Local Key working is available.
- When set both 'Local Key' and 'Remocon Operation' as No(Do Not Work), Power key of Remocon work as exceptional

case.

- Decide to set Channel and Volume value or not those are displaying when Power On by setting 'On Monitor Operation' as

Yes(Work) or No(Do Not Work).

- When 'On Monitor Operation' is set to No(Do Not Work), user cannot enter inside of 'channel' and 'volume' item.
- When 'On Monitor Operation' is set to Yes(Work), user can enter inside of menu and set value.
- When 'Channel' item of 'On Monitor Operation' is set to No(Do Not Work), and 'On Monitor Operation' is set to Yes(Work),

then TV saves present input source and always turn on as the saved input source when turn on. If user enters Hotel Mode
as other input source that user wants (except TV mode), and set 'Channel' item as Yes(Work), then it will work.

- When 'On Monitor Operation' is set to No(Do Not Work), TV will be turned on as last memorized channel or input source.

- 14 -

- Decide to turn on TV as set channel or last memorized channel or not by setting 'Channel' as On(Work) or Off(Do Not

Work).

- When 'On Monitor Operation' is set to Yes(Work), then user can enter 'Channel' and set the value.
- When 'On Monitor Operation' is set to On(Work), setting 'Channel' value of ''On Monitor Operation' is possible and TV

always turns on as set 'Channel' value.

- When 'On Monitor Operation' is set to Off(Do Not Work), setting 'Channel' value of 'On Monitor Operation' is impossible and

TV turns on last memorized channel.

- If user wants to turn on by other Input source except TV, change Input source as you want and enter to 'Hotel Mode', then

select 'Channel' item as Off(Do Not Work) or Do Not select this item On(Work) from the beginning.

- In the case of both 'Channel' and 'On Time' is set, but just the value is different, then 'Channel' value has priority.

- If there's no key input during 2 hours after turn on TV by 'Power On' function of the 'On Time',  then turn off TV by 'Auto Off'

function of 'Time Menu'. This item decide to turn on TV by 'Auto Off Operation' regardless of 'Auto off' function of 'Time
Menu' or not by setting as Yes(Work) or No(Do Not Work).

- When 'Auto Off Operation' is set to Yes(Work), 'Auto Off Operation' work as configuration.
- When 'Auto Off Operation' is set to No(Do Not Work), 'Auto Off Operation' Do Not work regardless of configuration.

- Decide whether to use default data or user data that are program, volume, picture, audio and ARC.
- Be  selected Yes(Work) or No(Do Not Work).
- This item has lower priority than the 'On Monitor Operation' in hotel menu.
- When 'A/V Defualt Setting' is set to Yes(Work), TV will be turned on with default data.
- When 'A/V Defualt Setting' is set to No(Do Not Work), TV will be turned on with some values changed by last  user or set

by you in hotel menu.

- Decide to work all functions of 'Hotel Mode Operation' or not by setting 'Hotel Mode Operation' as Yes(Work) or No(Do Not

Work).

- When 'Hotel Mode Operation' is set to Yes(Work), all functions of Hotel Mode apply.
- When 'Hotel Mode Operation' is set to No(Do Not Work), all functions of Hotel Mode Do Not apply.

Channel Menu

Yes

No

Yes

Channel Change

Yes

No

Yes

Input Mode Change

Yes

No

Yes

Fixed Volume

Yes

No

No

Max Volume

0 ~ 100

100

OSD Display

Yes

No

Yes

Remote Operation

Yes

No

Yes

Local Key Operation

Yes

No

Yes

On Monitor Operation

Yes

No

No

Volume

On

Off

Off

Volume Level

0 ~ 100

30

Channel

On

Off

Off

Channel Number

0 ~ 99

1

Auto Off Operation

Yes

No

Yes

Hotel Mode Operation

Yes

No

No

- 15 -

No power 
(LED indicator off)

Check short of main B/D 
or Change Lips

Change IC1107, IC1104

Change LED Assy

Check 15V or 5V 

of Lips

Check Output of 

IC1107, IC104

Check LED Assy

Check P1100, P210 Connector 

Fail

Fail

Change Q1100

Check Output of 

Q1100

Fail

Pass

Fail

Pass

Pass

Pass

- 16 -

No Raster

Check LED Status 

on display unit

Check the input/

Output of IC901

Check L900,L901

L902,L903

Check inverter

Connector or inverter

Check input source cable and jack 

Repeat A PROCESS

Fail

Change L900,L901,
L902,L903

Fail

Change IC901

Fail

Change inverter
connector or inverter

Fail

Change panel link
cable or module

Fail

Change module

Fail

Check panel link 
Cable or module

Pass

Pass

Pass

Pass