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Topfield TF4000FI User Manual

Topfield TF4000FI
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TF4000Fi
Service Manual
15 March, 2004
Topfield Co., Ltd
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Topfield TF4000FI Specifications

General IconGeneral
TypeSatellite Receiver
Free To AirYes
TunerDVB-S2
LNB IF input Frequency Range950 - 2150 MHz
Input Impedance75 Ohm
Symbol Rate1-45 MS/s
EPGYes
TeletextYes
SubtitlesYes
Video DecodingMPEG-2
Audio DecodingMPEG-1 Layer I & II
Video OutputHDMI, Composite
Audio OutputStereo
ConnectorsHDMI, USB, Ethernet, SCART, RCA, LNB Input
USBUSB 2.0
Network ConnectivityEthernet
CI Slot1
Power SupplyAC 90 ~ 250V, 50/60Hz
Power Consumption30W

Summary

IMPORTANT OPERATIONAL NOTES

Servicing Safety Warning

Emphasizes qualified personnel for servicing to prevent electric shock.

Safety Instructions for Servicing

Pre-Servicing Safety Precautions

Detailed steps for safe servicing, including power disconnection and capacitor discharge.

Troubleshooting - Visual Test

Troubleshooting - Basic Functionality (Part 1)

LED and Remote Control Issues

Diagnosing problems related to LEDs, RCU, and front panel buttons.

Troubleshooting - Basic Functionality (Part 2)

Picture and Sound Troubleshooting

Addressing issues like no picture, no sound, or combined problems.

Advanced Main Board Diagnostics

Key Voltage Measurements

Specific voltage points on the Main Board for diagnostic testing.

Reset Circuit Analysis

Procedure to check the reset signal integrity and related components.

System Clock and RS232 Interface Tests

LNB Power and RF Modulator Troubleshooting

LNB Power Control and Voltage Checks

Procedures for checking LNB power selection and output voltages.

Video, Audio, and Remote Control Diagnostics

Advanced SMPS Troubleshooting

SMPS Diode and Regulator Testing

Procedures for testing diodes and shunt regulators for proper operation.

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