MITSUBISHI HD6000 - Service Manual Immediate Download

CAUTION:

Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and

"PRODUCT SAFETY NOTICE" contained in this manual.

· Design specifications are subject to change without notice.

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Road, Irvine, CA 92618-1904

MITSUBISHIELECTRIC Ser

Ser

Service

vice

Manual

2005

SET TOP BOX

V26S CHASSIS

SPECIFICATIONS

· Power Input

: AC 120V, 60Hz

· Power Usage

: 82W

· Frequency Range

: VHF

54 ~ 470MHz

UHF 470 ~ 806MHz

Analog Cable - 1 ~ 125

Digital Cable - 1 ~ 135

· Antenna Input

: 2 RF 75

unbalanced

· Tuning

: 1 NTSC/ATSC/QAM

1 CableCARDTM Slot

1 NTSC for PIP

· Cabinet Dimensions

: 17"(W) x 3.4"(H) x 16.8"(D)

· Weight

: 27 lbs

· PVR

: 120 GB Hard Disc

Approx. 12 hrs HD Recording

72 hrs SD Recording

· Analog Input

: VIDEO IN JACK (RCA Type)

Levels

1.0Vp-p 75

unbalanced

: AUDIO IN JACK (RCA Type)

-4.7dBm 43k

unbalanced

: S-VIDEO IN JACK

(Y/C separate type)

Y:1.0 Vp-p C:0.286Vp-p(BURST)

unbalanced

: COMP / Y, Cr, Cb (RCA Type)

Y: 1.0 Vp-p Cr, Cb: 700mVp-p

: ATV / Y(G), Pr(R), Pb(B), H, V

Y: 1.0Vp-p with sync 75

(BNC)

Pr, Pb: 700mV 75

H, V: 3.0Vp-p 75

: VGA / R,G,B,V,H (15 pin D)

· Output Level

: VIDEO OUT JACK (RCA Type)

1.0Vp-p 75

unbalanced

: COMP / Y,Cr,Cb

Y: 1.0 Vp-p Cr, Cb: 700mVp-p

: AUDIO OUT JACK (RCA Type)

-4.7dBm 4.7k

unbalanced

· Digital

: IEEE-1394 I/O Jacks

Interface

: AC-3 Digtal Audio Output

: HDMITM Input/Output

: MonitorLinkTM Control/RS-232C

: CableCARDTM Slot

: NetCommand®

MODEL

HD-6000

MODEL: HD-6000

Page 3

INTRODUCTION ................................................................................................................................5

PRODUCT SAFETY NOTICE ............................................................................................................. 5

SAFETY PRECAUTIONS ................................................................................................................... 6

PWB-LOCATIONS ............................................................................................................................. 7

DISASSEMBLY .................................................................................................................................. 7

Disassembly Procedures Sequence ...................................................................................... 7

Top Cover removal .................................................................................................................. 8

HDD (Hard Drive) removal ....................................................................................................... 9

PWB'S removal ................................................................................................................... 10

ELECTRICAL ADJUSTMENTS ........................................................................................................ 11

Equipment .................................................................................................................................... 11

Option Menu / Initialization Defaults / AV Defaults ......................................................................... 12

LED Diagnostics ........................................................................................................................... 13

Remote Control Operational Mode ................................................................................................ 13

Circuit Adjustment Mode ............................................................................................................... 14

Transfering data ............................................................................................................................ 15

Adjustment Items List ................................................................................................................... 15

Adjustment Procedures ................................................................................................................ 16

Test Points .......................................................................................................................... 16

Main-Y Gain ......................................................................................................................... 16

Sub-Y Gain .......................................................................................................................... 17

Sub Picture Offset ............................................................................................................... 17

CHIP PARTS REPLACEMENT ......................................................................................................... 18

REPLACEMENT PARTS .................................................................................................................. 19

Parts Ordering .............................................................................................................................. 19

Critical and Warranty Parts Designation ........................................................................................ 19

Parts Tolerance Codes .................................................................................................................. 19

SERVICE PARTS LIST .................................................................................................................... 20

CIRCUITRY BLOCK DIAGRAMS ..................................................................................................... 29

Standby Power Supplies ............................................................................................................... 29

PWB-DM Power Supplies ............................................................................................................. 30

PWB-SIGNAL Switched Power Supplies ...................................................................................... 30

Video Select Circuitry ................................................................................................................... 31

Video Output Circuitry ................................................................................................................... 32

Sync Signal Selection ................................................................................................................... 33

Sync Signal Output Path .............................................................................................................. 34

Record Signal Path ....................................................................................................................... 34

Sound Signal Path ........................................................................................................................ 35

Control Circuitry ............................................................................................................................ 36

Command Input Circuitry ............................................................................................................... 37

Macrovision Detection ................................................................................................................... 37

PWB-DM Signal Path ................................................................................................................... 38

CONTENTS

Page 4

MODEL: HD-6000

Part 2

Schematic Diagrams

CONTENTS

Page

SCHEMATIC DIAGRAMS

Overall PWB Interconnect Diagram ................................................................................................. 1

POWER / E2P / CONTROL / MV Decoder] .................................................................................... 2

TERMINAL-1 / TERMINAL-2 [Inputs / Outputs] ............................................................................... 3

SIGNAL-1 [Video Switch] ................................................................................................................ 4

SIGNAL-2 [Decoder / Switch] .......................................................................................................... 5

SIGNALS-3 [Micro} ......................................................................................................................... 6

SIGNAL-4 [TVGO] .......................................................................................................................... 7

SIGNAL-5 [MPEG Encoder] ............................................................................................................ 8

SIGNAL-6 [HDMI RX] ...................................................................................................................... 9

SIGNAL-7 [HDMI TX] ..................................................................................................................... 10

SIGNAL-8 [Video Output] ............................................................................................................. 11

SIGNAL-9 [IR232] ......................................................................................................................... 12

TUNER-1 [ATSC / NTSC Tuner] .................................................................................................... 13

TUNER-2 [Main ATSC / NTSC Demodulators] ............................................................................... 14

PWB LAYOUT DIAGRAMS .............................................................................................................. 15

MODELS: HD-6000

Page 5

INTRODUCTION

This service manual provides service instructions for STB model HD-6000 which uses the V26S 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.

PRODUCT SAFETY NOTICE

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.