This document is the user manual of LG MC-059B 21FG1AG 21FG1AG-TH
This manual provides detailed safety instructions, specifications, and service procedures for the LG 21FG1AG (21FG1AG-TH) CRT color television. It includes safety warnings, high‑voltage precautions, leakage checks, and recommended protective equipment for technicians.
The document contains a table of contents with sections on specifications, printed circuit board diagrams, fault‑tracking checklists, block diagrams, part‑explosion views, and extensive adjustment procedures for AGC voltage, screen voltage, color purity, convergence, and white‑balance. It is intended for internal use by LG service personnel. This manual is written in Chinese.
| Reception Channels | VHF E2‑E12, UHF E21‑E69, CATV S1‑S20, HYPER S21‑S41 |
|---|---|
| Input Voltage | 100‑240 V, 50/60 Hz |
| Applicable Regions | China, Indonesia, Thailand, Vietnam, CIS |
| Screen Size | 14‑21 inch (flat or conventional) |
| High‑Voltage for 14‑19 inch CRT | 23.5 ± 1.5 kV |
Use an isolation transformer, replace only parts recommended in the manual, and follow the high‑voltage and X‑ray safety warnings.
Measure resistance between exposed metal parts and the chassis; it should be between 1 MΩ and 5.2 MΩ, and the voltage should not exceed 0.75 V RMS.
The high voltage should be 23.5 kV with a tolerance of ±1.5 kV.
The TV accepts 100 V to 240 V AC at 50 Hz or 60 Hz.