REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 13 March 2019

LG 20LS2R ADJUSTMENT INSTRUCTION WITH SERVICE REMOTE CONTROL

LG 20LS2R ADJUSTMENT INSTRUCTION WITH SERVICE REMOTE CONTROL



ADJUSTMENT INSTRUCTION WITH SERVICE REMOTE CONTROL 

1. Application Range
This specification sheet is applied to 20”/ 23” LCD TV which is manufactured in TV (or Monitor) Factory or is produced on the basis of this data.
2. Specification
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) Power Adjustment: Free Voltage
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard
5) Reserve after operation: Above 30 Minutes
6) Adjustment equipments: Color Analyzer(CA-210 or CA-
110), Pattern Generator (MSPG-925L or Equivalent), DDC Adjustment Jig equipment, SVC remote controller.
3. Main PCB check process
* APC - After Manual-Insult, executing APC
3.1. Download
1) Execute ISP program “Mstar ISP Utility” and then click “Config” tab.
2) Set as below, and then click “Auto Detect” and check “OK” message.
If display “Error”, Check connect computer, jig, and set.
3) Click “Connect” tab. If display “Can’t ”, Check connect computer, jig, and set.
4) Click “Read” tab, and then load download file(XXXX.bin) by clicking “Read”.
5) Click “Auto” tab and set as below
6) click “Run”.
7) After downloading, check “OK” message
3.2. ADC Process
(1) PC input ADC
1) Auto RGB Gain/Offset Adjustment
- Convert to PC in Input-source
- Signal equipment displays
Output Voltage : 730 mVp-p
Impress Resolution WXGA (1360 x 768 @ 60Hz)
Model : 107 in Pattern Generator
Pattern : 28 in Pattern Generator (MSPG-925 Series)
[gray pattern that left & right is black and center is
white signal (Refer below picture)]
- Adjust by commanding AUTO_COLOR _ADJUST (0xF1) 0x00 0x02 instruction.
2) Confirmation
- We confirm whether “0x8C” address of EEPROM
“0xB4” is “0xAA” or not.
- If “0x8C” address of EEPROM “0xB4” isn’t “0xAA”, we adjust once more.
- We can confirm the ADC values from “0x00~0x05” addresses in a page “0xB4”
* Manual ADC process using Service Remote control. After enter Service Mode by pushing “INSTART” key, execute “Auto-RGB” by pushing “G” key at “AutoRGB”.
(2) COMPONENT input ADC
1) Component Gain/Offset Adjustment
- Convert to Component in Input-source
- Signal equipment displays
Impress Resolution 480P
MODEL : 212 in Pattern Generator (480p Mode, Y : 100%, Pb/Pr : 75%)
PATTERN : 08 in Pattern Generator
(MSPG-925 Series)
- Adjust by commanding AUTO_COLOR_ADJUST (0xF1) 0x00 0x02 instruction.
2) Confirmation
- We confirm whether “0x8E” address of EEPROM “0xB4” is “0xAA” or not.
- If “0x8E” address of EEPROM “0xB4” isn’t “0xAA”, we adjust once more.
- We can confirm the ADC values from “0x00~0x05” addresses in a page “0xB4”. 3.3. Function Check
Check display and sound
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV1 (SCART)
3) AV2 (CVBS/ S-Video)
4) COMPONENT (480P)
5) RGB (PC : 1024 x 768 @ 60hz)
6) HDMI
7) PC Audio In and H/P Out
* Display and Sound check is executed by Remote control.
4. Total Assembly line process
4.1. Adjustment Preparation
(1) Above 30 minutes H/run in RF no signal
(2) 15 Pin D-Sub Jack is connected to the signal of Pattern Generator.
4.2. Confirm color coordinate of RGB
(1) Set Input to RGB.
(2) Input signal : WXGA (1360 x 768 @ 60Hz),Full white 216/255 gray level (85 IRE, Model : 107, Pattern : 78 at MSPG925L)
(3) Set CSM : Cool
(4) Confirm whether x = 0.283±0.03, y = 0.298±0.03 or not.
4.3. Confirm color coordinate of AV2
(1) Set Input to AV2
(2) Input signal : CVBS, PAL @ 50Hz Full white 216/255 gray level (85 IRE, Model : 202, Pattern : 78 at MSPG925L)
(3) Set PSM : Dynamic / CSM : Cool
(4) Confirm whether x = 0.283±0.03, y = 0.298±0.03 or not.
4.4. Confirm color coordinate of component
(1) Set Input to COMPONENT.
(2) Input signal : 480P Full white 216/255 gray level (85 IRE Model : 212, Pattern :
78 at MSPG925L)
(3) Set PSM : Dynamic / CSM : Cool
(4) Confirm whether x = 0.283±0.03, y = 0.298±0.03 or not
4.5. Other quality
 Confirm that each items satisfy under standard condition that was written product spec.
 Confirm Video and Sound at each source
(1) AV
1) Select input AV1 and whether picture is displayed or not.
- SCART output displayed or not.
2) Select input AV2 (S-video) and whether picture is displayed or not
3) Select input AV2 (CVBS) and whether picture is displayed or not
(2) TV
- Select input TV and check below item
* In Gumi Factory
C05 (E05) – TELETEXT Function Check
; (Applicable to the model that has Teletext code set-up item in Product spec)
C07 (E07) – Nicam DUAL Check.
C52 (E52) – Nicam Stereo Check.
(3) RGB
- Select input RGB and whether picture is displayed or not.
(4) COMPONENT
- Select input COMPONENT and whether picture is displayed or not.
(5)HDMI
- Select input HDMI and whether picture is displayed or not
4.6. DPM operation confirmation
- Check if Power LED Color and Power Consumption operate as standard.
(1) Set Input to RGB and connect D-sub cable to set.
(2) Measurement Condition : 230V@ 50Hz (Analog)
(3) Confirm DPM operation at the state of screen without Signal
4.7 DDC EDID Write
1) Connect D-sub Signal Cable to D-Sub Jack.
2) Connect HDMI Signal Cable to HDMI Jack.
3) Write EDID DATA to EEPROM(24C02) by using DDC2B protocol.
4) Check whether written EDID data is correct or not. (refer to Product spec)
(1) 20LS2R EDID DATA
1) ANALOG DATA 128Byte
4.8. HDCP SETTING
(High-Bandwidth Digital Contents Protection)
1) Connect D-sub Signal Cable to D-Sub Jack.
2) Input HDCP key with HDCP-key- in-program.
3) HDCP Key value is stored on EEPROM(AT24C64) which is E00~F20 addresses of 0xBC~0xBE page.
4) AC off/ on and on HDCP button of MSPG925 and confirm whether picture is displayed or not of using MSPG925.
5) HDCP Key value is different among the sets. 4.9. Outgoing condition Configuration
1) After all function test., press IN-STOP Key by SVC Remote controller. And Make Ship Condition.
2) When pressing IN-STOP key by SVC remocon, Green and red LED are blinked alternatively. And then Automatically turn off. (Must not AC power OFF during blinking) 4.10. Internal pressure
- Confirm whether is nomal or not when between power board's ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for one second.
Posted By: FRANK at 02:40
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