Read LG 32LV3500-UG / 32LV3520-UJ (CHASSIS:LA01M) Service Manual online
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ADJUSTMENT INSTRUCTION
1. Application range
This spec. sheet applies to LA01M Chassis applied LCD TV
all models manufactured in TV factory.
all models manufactured in TV factory.
2. Specification
2.1 Because this is not a hot chassis, it is not necessary
to use an isolation transformer. However, the use of
isolation transformer will help protect test instrument.
isolation transformer will help protect test instrument.
2.2 Adjustment must be done in the correct order.
2.3 The adjustment must be performed in the
2.3 The adjustment must be performed in the
circumstance of 25±5°C of temperature and 65±10%
of relative humidity
of relative humidity
2.4 The input voltage of the receiver must keep
100~240V~, 50/60Hz.
2.5 At first Worker must turn on the SET by using Power
Only key.
2.6 The receiver must be operated for about 5 minutes
prior to the adjustment when module is in the
circumstance of over 15.
circumstance of over 15.
• Caution
When a still image is displayed for 20 minutes or longer
(especially where W/B scale is strong. Digital pattern 13ch
and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
When a still image is displayed for 20 minutes or longer
(especially where W/B scale is strong. Digital pattern 13ch
and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. Adjustment items
3.1. Main PCBA Adjustments
(1) ADC adjustment: Component 480i, 1080p / RGB-PC
1080p
(2) EDID download: HDMI and RGB-PC
• Remark
- Above adjustment items can be also performed in Final
Assembly if needed. Adjustment items in both PCBA and
final assembly stages can be checked by using the
INSTART Menu 1.ADJUST CHECK.
final assembly stages can be checked by using the
INSTART Menu 1.ADJUST CHECK.
3.2 Final Assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (IN-STOP)
(5) GND and HI-POT test
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (IN-STOP)
(5) GND and HI-POT test
3.3 Etc
(1) Shipment conditions
(2) Tool option menu
(3) USB Download (S/W Update, Option and Service only)
(4) Preset CH Information
(2) Tool option menu
(3) USB Download (S/W Update, Option and Service only)
(4) Preset CH Information
4. MAIN PCBA Adjustments
4.1. ADC Adjustment
4.1.1. Overview
• ADC adjustment is needed to find the optimum black level
• ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation.
deviation.
4.1.2. Equipment & Condition
(1) Protocol: RS-232C
(2) Inner Pattern
- Resolution : 1080p(Comp) / 1024*768(RGB)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
(1) Protocol: RS-232C
(2) Inner Pattern
- Resolution : 1080p(Comp) / 1024*768(RGB)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
4.1.3. Adjustment
4.1.3.1 Adjustment method
• Connect to Jig by using RS-232, adjust Component and
• Connect to Jig by using RS-232, adjust Component and
RGB
*Manual adj (If needed in Final Assembly)
- Required equipment : Adjustment R/C
- Enter Service Mode by pushing “ADJ” key,
- Required equipment : Adjustment R/C
- Enter Service Mode by pushing “ADJ” key,
G
’ key at [6. ADC
Calibration]
4.1.3.2 Adj. protocol
Protocol
CMD 1 CMD 2 Data 1 Data 2
Remark
Enter adj mode
a
a
00
00 When transfer the Mode In,Carry the command.
Start ADC adj
a
d
00
10
Automatically adjustment (Use internal pattern)
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