Adjustment Instruction; Main Pcb Check Process (Smt) - LG 27UL550 Service Manual

1. Application
1.1 This document is applied to LM8CA chassis 27BL55U/27UL550 & 27UL500 LCD Monitor which is manufactured in Monitor Factory or is
produced on the basis of this data.
1.2 Manufacturing Type: SET
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 5 Minutes (Heat Run)
Temperature : at 25℃±5°C / Relative humidity: 65 ±10% / Input voltage: 100 ~ 240V, 50/60Hz
2.6. Adjustment equipments: Color Analyzer (CA‐210 or CA‐110), DDC Adjustment Jig equipment,
3. Main PCB check process(SMT)
After Manual‐Insult, executing APC
* APC ‐
3.1 ADC Process
‐ 27UL550/27BL55U/ 27UL500 doesn't need ADC process because it has only digital input like DisplayPort, HDMI.
3.2 Main PCB Function test
‐ Check display/audio according to interface
3.3Write HDCP 2.2 Key
a. Write HDCP Key into Flash memory by using DDC2AB protocol & HDCP Adjustment Jig equipment.
HDCP 2.2 Write Command : E9 AddressHigh AddressLow ex) E9 00 00
* There must be input signal. No input signal causes the HDCP Key write fail.
* HDCP 1.4 Key is embedded on scaler.

ADJUSTMENT INSTRUCTION

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