Model: Hd - Mitsubishi Electric HD-4001 Service Manual

This service manual provides service instructions for STB model HD-4001 which uses the V26K chassis. Service
personnel should read this manual thoroughly before servicing these chassis.
This service manual includes:
1. Safety Precautions
2. Assembly and disassembly instructions.
3. Servicing printed circuit boards (PCBs).
4. Electrical adjustments.
5. Chip parts replacement procedures.
6. Circuit path diagrams.
The parts list section of this service manual includes:
1. Cabinet and screen parts.
2. Electrical parts.
Schematic and block diagrams of the above listed models are included in this service manual for better understanding
of the circuitry. PCB drawings are also included for easy location of parts and test points.
Many electrical and mechanical parts in television receivers have special safety related characteristics. These charac-
teristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by
using replacement components rated for higher voltage, wattage, etc.
Replacement parts which have special safety characteristics are identified in this service manual.
Electrical components having such features are identified by shading on the schematic diagrams and by bold type in
the parts list of this service manual. and by marking on the supplementary sheet for this chassis to be issued subse-
quently. The replacement for any safety part should be identical in value and characteristics.
CableCARD is a trademark of Cable Television Laboratories, Inc.
TV Guide On Screen is a registered trademark of Gemstar Development Corp.
HDMI is a trademark of HDMI Licensing, LLC.
MODELS: HD-4001
INTRODUCTION
PRODUCT SAFETY NOTICE
Page 5