Adjustment Instruction - LG RT-23LZ55 Service Manual

1. Application
This document is applied to 23", 26", 32" Wide LCD TV which
is manufactured in Monitor Factory or is produced on the
basis of this data.
2. Designation
2.1 The adjustment is according to the order which is
designated and which must be followed, according to
the plan which can be changed only on agreeing.
2.2 Power Adjustment : Free Voltage
2.3 Magnetic Field Condition: Nil.
2.4 Input signal Unit : Product specification standard
2.5 Reserve after operation : Above 2 hours
2.6 Adjustment equipments : Pattern Generator
(MSPG925F), DDC Adjustment Jig equipment HDCP
Adjustment Jig equipment.
3. Adjustments
3.1 Adjustment Details
The machine can be adjusted by itself automatically with
factory automatic equipment, in case error occurs, set
manual adjustment to standard.
3.2 Adjustment signal Composition of The Auto
Adjustment equipment
3.2.1 RS-232C Interchange
9600bps, Pin#2 : Rx, Pin#3 : Tx, 8bit, STOP bit=1, No
Parity
3.2.2 Adjust data save
Save the adjusted data to the EEPROM with default
value
ai - 0 - 00
3.2.3 Adjust OK
ak - 0 - 00
3.2.4 Screen Adjustment Instruction Forms
CMD1 CMD2 SetID(0) Value
a. CMD1,CMD2 : Instructions operated by Monitor
b. SetID L 0h Set always 0 in Adjustment
VALUE : Adjustment Value

ADJUSTMENT INSTRUCTION

3.2.5 Screen Adjustment Instructions
Adjustment Content
1 Mode Select
2 Sub Brightness
3 Sub Contrast
4 R _ Offset Adjustment Aa
5 G _ Offset Adjustment Ab
6 B _ Off\set Adjustment Ac
7 R _ Gain Adjustment Ad
8 G _ Gain Adjustment Ae
9 B _ Gain Adjustment Af
10 Adjust Data Save
11 Adjust OK
3.3 PC signal Gain/Offset Adjustment (Execute
first of all in adjustment process)
3.3.1 Adjustment Preparation
- Execution of RF no signal during Heat Run over 30min
- Pattern generator signal is connected to the DVI-I Jack of
LCD TV.
3.3.2 Auto Gain/Offset Adjustment (Input signal Level : 730mV)
- To use Pattern Generator(MSPG925FS), Apply Model 37,
Patten 19 ( XGA(1024 X 768)60Hz, white/black top and
bottom pattern signal (Don't apply 16 gray signal)
- Press IN-START Key by using the Remote Controller
(SVC) , after converting to Adjustment-Mode, press VOL+
Key consecutively in Auto-Gain Menu.
- After adjustment is complete, pressing enter key, stores
and completes the process.
3.4 Video signal Gain/Offset Adjustment(Auto
adjustment)
- Execution of RF no signal during Heat Run over 30min
- Connect to the LCD TV SCART input terminal with Patten
Generator(MSPG-925FS)
- Convert INPUT MODE to S-Video or AV1.
- Connect RS-232C Communication Cable to the Auto
Adjustment Equipment and SET's upgrade Port.
3.4.1 Low Gray Adjustment
- Apply Gray-Level(Model : 202 PAL_BDGH, pattern : 59)
signal by using Pattern Generator(MSPG-925FS)
- Check weather color-coordinates(x : 0.283, y : 0.298,
±0.005) is operated by using CA-110 equipment
- If color-coordinates is not in Spec, adjust color-
coordinates(x : 0.283, y : 0.298, ±0.005) by adjusting Red
Offset.
- 10 -
CMD(ASCII) VALUE(hex) Detail Explanation
Kb 10,20,30,40,50 10 : RF(TV)
20: AV1
30 : S-Video
40 : Component
50 : PC
Ah 00 ~ 0X64
Ag 00 ~ 0X64
00 ~ 7f
00 ~ 7f
00 ~ 7f
00 ~ ff
00 ~ ff
00 ~ ff The data which is adjusted store
ai 00 The signal Adjustment was
ak 00 completed
- RZ-23LZ55