LG 42PN450D-ZA / 42PN451D-ZF / 42PN452D-ZE (CHASSIS:PU31A) Service Manual ▷ View online
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* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (Illumination is less than 100Lux).
2) Adhere closely the Color Analyzer ( CA210 ) to the
module less than 10cm distance, keep it with the surface
of the Module and Color Analyzer’s Prove vertically.
(80~100°).
3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 5 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others,
check the back light on.
■ Auto adjustment Map(RS-232C)
RS-232C COMMAND
[ CMD ID DATA ]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
* Caution
- Color Temperature : COOL, Medium, Warm.
- One of R Gain/G Gain/ B Gain should be kept on 0xC0,
and adjust other two lower than C0. (when R/G/B Gain
are all C0, it is the FULL Dynamic Range of Module)
* Manual W/B process using adjusts Remote control.
■ After enter Service Mode by pushing “ADJ” key,
■ Enter White Balance by pushing “►” key at “6. White
Balance”.
■ Stick the sensor to the center of the screen and select
each items(Red/Green/Blue Gain) using ▲/▼(CH +/-)
key on R/C.
■ Adjust R/G/B Gain using◄/►(VOL +/-) key on R/C.
■ Adjust three modes all(Cool/Medium/Warm) : Fix the one
of R/G/B Gain and Change the others.
■ When the adjustment is completed, Enter “COPY ALL”.
■ Exit adjustment mode using EXIT key on R/C.
* After You finish all adjustments, Press “In-start” button and
compare Tool option and Area option value with its BOM, if it
is correctly same then unplug the AC cable.
If it is not same, then correct it same with BOM and unplug
AC cable.
For correct it to the model’s module from factory JIG model.
* Push The “IN STOP KEY” after completing the function
inspection. And Mechanical Power Switch must be set “ON”
* To check the coordinates of White Balance, you have to
measure at the below conditions.
- Picture mode : Vivid, Energy Saving : Off, Below the Ad-
vanced control, Dynamic Contrast : Off, Dynamic Colour : Off
Colour Temp.
-> Picture Mode change : Vivid -> Vivid(User)
4.3. DDC EDID Write (HDMI 256Byte)
-> Not used any more, Use Auto D/L
■ Connect HDMI Signal Cable to HDMI Jack.
■ Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
■ Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert
Process in advance.
4.4. EDID DATA
(1) All Data : HEXA Value
(2) Changeable Data :
* : Serial No : Controlled / Data:01
** : Month : Controlled / Data:00
*** : Year : Controlled
**** : Check sum
4.5. EDID DATA Auto Download
(1) Press Adj. key on the Adj. R/C,
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
RS-232C
COMMAND
[CMD ID DATA]
M
I
N
CENTER
(DEFAULT)
M
A
X
Cool Mid Warm
Cool Mid Warm
R Gain
jg
Ja
jd
00
172 192
192
192
G Gain
jh
Jb
je
00
172 192
192
192
B Gain
ji
Jc
jf
00
192 192
172
192
R Cut
64
64
64
128
G Cut
64
64
64
128
B Cut
64
64
64
128
Cool
30
Medium
0
Warm
30
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4.6 LNB voltage and 22KHz tone check
(1) Test method
1) Press "Power on" button of a service R/C.(Baud rate :
115200 bps)
2) Connect cable between satellite ANT and test JIG.
3) Connect RS232-C Signal Cable.
4) Write LNB ON control command through RS-232-C.
5) check LED light ‘ON’ at 18V menu.
6) check LED light ‘ON’ at 22KHz tone menu.
7) Write LNB OFF control command through RS-232-C.
8) check LED light ‘OFF’ at 18V menu.
9) check LED light ‘OFF’ at 22KHz tone menu.
(2) RS-232 command for test LNB
(3) Test result
- After send LNB On command, ‘18V LED’ and ‘22KHz
tone LED’ should be ON.
- After send LNB Off command, ‘18V LED’ and ‘22KHz tone
LED’ should be OFF.
<Remark>
After the measurement conditions witnessed in the last state.
* Caution : Never connect HDMI & D-sub Cable when EDID
downloaded.
■ Edid data and Model option download (RS232 Zender)
- Manual Download
* Caution
● Use the proper signal cable for EDID Download
- Digital EDID : Pin3 exists
* Caution
- Never connect HDMI & D-sub Cable at the same time.
- Use the proper cables below for EDID Writing.
- Download HDMI1, HDMI2 separately because HDMI1 is dif-
ferent from HDMI2.
NO
Enter
download MODE
EDID data and
Model option download
Item
download ‘Mode In’
download
CMD 1
A
A
CMD 2
A
E
Data 0
0
00
0
10
When transfer the
‘Mode In’,
Carry the command.
Automatically download
(The use of a internal
Data)
No.
Item
Condition
Hex Data
1
Manufacturer ID
GSM
1E6D
2
Version
Digital : 1
01
3
Revision
Digital : 3
03
For HDMI EDID
DVI-D to HDMI or HDMI to HDMI
Command
Set ACK
LNB On
[A][I][ ][Set ID][ ][30][Cr]
[O][K][x] or NG : [N][G][x]
LNB Off
[A][I][ ][Set ID][ ][40][Cr]
[O][K][x] or NG : [N][G][x]
tGi
{
k}iTzYGG
ck}iGGGqpnGGe
4;Y
46Y
55NK}#
Wrqh RQ
Wrqh RQ
55NK}
Wrqh#Rii
Wrqh#Rii
tGi
{
k}iTzYGG
ck}iGGGqpnGGe
4;Y
46Y
55NK}#
Wrqh RQ
Wrqh RQ
55NK}
Wrqh#Rii
Wrqh#Rii
4;Y
46Y
55NK}#
Wrqh RQ
Wrqh RQ
55NK}
Wrqh#Rii
Wrqh#Rii
- 11 -
* 2D HD EDID data
- 2D HD HDMI1 EDID data
- 2D HD HDMI2 EDID data
* Vender ID
* Checksum: Changeable by total EDID data.
4.7. GND & Hi-pot test
■ GND TEST = POWER CORD GND and SIGNAL CABLE
GND
■ Hi-pot TEST = POWER CORD GND and LIVE&NUETRAL
■ Test Process
1. Check the POWER CABLE and SIGNAL CABLE
insertion condition.
2. Connect the AV JACK Tester
3. Controller(GWS103-4) on
4. GND TEST(Auto)
- If Test is failed, Buzzer operate
- If Test is passed, execute next process(HI-pot test)
- Remove A/V CORD from A/V JACK BOX
5. HI-POT test(Auto)
- If Test is failed, Buzzer operate
- If Test is passed, GOOD Lamp on and move to next
process automatically.
■ Checkpoint
(1) Test voltage
1) 3 Poles
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
2) 2 Poles
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
1) 3 Poles
- GND Test = POWER CORD GND and SIGNAL
CABLE GND.
- Hi-pot Test = POWER CORD GND and LIVE &
NEUTRAL.
2) 2 Poles
- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
Input
HEX
HDMI1
10
HDMI2
20
HDMI3
30
EDID C/S data
2D-HD
HDMI
check sum
(Hex)
Block 0
0x3E
Block 1
0x24(HDMI1)
0x14(HDMI2)
0x14(HDMI2)
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5. Model name & Serial number Download
5.1. Model name & Serial number D/L
■ Press “Power on” key of service remocon.(Baud rate :
115200 bps)
■ Connect RS232 Signal Cable to RS-232 Jack.
■ Write Serial number by use RS-232.
■ Must check the serial number at signal test of customer sup-
port. (Refer to below).
5.2. Signal TABLE
CMD: A0h
LENGTH
: 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 + … + Data_n
Delay : 20ms
5.3. Command Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart,
0, Phase
Data write : Model Name and Serial Number write in EEP-
ROM,.
5.4. Method & Notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0
* Manual Download (Model Name and Serial Number)
If the TV set is downloaded By OTA or Service man,
Sometimes model name or serial number is initialized.( Not
always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the ‘instart’ key of ADJ remote controller.
2) Go to the menu ‘5.Model Number D/L’ like below photo.
3) Input the Factory model name or Serial number like
photo.
4) Check the model name Instart menu -> Factory name
displayed.
5) Check the Diagnostics (DTV country only) -> Buyer
model displayed
6. Download CI+ Key (EU model only)
* Connect TV SET and PC which download keys Writing pro-
gram by RS232C-Cable
(1) Start “CIKeyl.exe”Program and Click (3) Button to connect
TV and PC.
(2) Click (5) to download CI+ Key.
(3) When download succeed, you can see “OK” on (6)
CMD LENGTH
ADH
ADL
DATA_1 ...
Data_n
CS
DELAY
No.
1
Adjust mode
EEPROM WRITE
CMD(hex)
A0h
LENGTH(hex)
84h+n
Description
n-bytes Write (n = 1~16)
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