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File name: | 069aadj.pdf [preview 069aadj] |
Size: | 30 kB |
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Mfg: | LG |
Model: | 069aadj 🔎 |
Original: | 069aadj 🔎 |
Descr: | LG TV CT-21T30E 069aadj.pdf |
Group: | Electronics > Consumer electronics > TV |
Uploaded: | 08-03-2022 |
User: | Anonymous |
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Extracted files: | 1 | |
File name 069aadj.pdf ADJUSTMENT V Safety Precautions 1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to PAL/SECAM-BG PAL/SECAM- SYSTEM PAL-I prevent the risk of electric shock and protect the SECAM-LL' BG/DK instrument. 2. Never disconnect leads while the TV receiver is on. TUNER 6700VPF005A 6700VPF005B 6700VPF005B 3. Don't short any portion of circuits while power is on. AGC Voltage 2.3 ! 0.1V 2.3 ! 0.1V 2.1 ! 0.1V 4. The adjustment must be done by the correct appliances. But this is changeable in view of productivity. 5. Unless otherwise noted, set the line voltage to NOTE: AGC must be adjusted when the tuner was changed. 230Vac!10%, 50Hz. V Test Equipment required O Screen Voltage Adjustment 1. Multimeter (volt meter) 2. Oscilloscope Test Point : RK (Red Cathode of CPT Board) Adjust : Screen Control of FBT O RF AGC (Automatic Gain Control) Adjustment 1) Tune the TV set to receive a digital pattern. 2) Press PSM (RED) button on remote controller. (standard Test Point : RF AGC (J3) picture) Adjust : Remote Control 3) Connect the probe of oscilloscope to the RK (Red Cathode) of CPT Board. 4) Adjust Screen Volume of FBT so that the waveform is the The RF AGC was aligned at the time of manufacture for same as below figure. optimum performance over a wide range conditions. Readjustment of RF AGC should not be necessary unless unusual local conditions exist, such as ; Horizontal FlyBack Time Black level 1) Channel interference in a CATV system. 150Vp-p 2) Picture bending and/or color beats, which are unusually due to excessive RF signal input when t |
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