Vitek HT-728DT service manual

Service

ManualManual

ACTIVE 5.1CHANNEL SURROUND HOME CINEMA SYSTEM

Model Number: HT-728DT

CONTENTS

Page

Specifications....................................................................................................................................................... 2

Block Diagram...................................................................................................................................................... 3

Troubleshooting.................................................................................................................................................... 4

Printed Circuit Boards........................................................................................................................................... 5-8

Wiring Diagram..................................................................................................................................................... 9

Exploded Views and Disassembly Instructions................................................................................................... 10

Parts List.............................................................................................................................................................. 11

Schematic Diagram...............................................................................................................................................12-16

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety characteristics. These characteristics
often pass unnoticed and the protection afforded by them can not necessarily be obtained by using replace­ment components rated for higher voltage, wattage, etc. Replacement parts that have these special safety
characteristics are identified in this manual and its supplements; electrical components having such features
are identified by a ! in the schematic diagram and the parts list.

Before replacing any of these components, read the parts list in this manual carefully. The use of substitute
replacement parts that do not have the same safety characteristics as specified in the parts list may create
shock, fire, or other hazards.

SPECIFICATIONS

OUTPUT POWER

SUBWOOFER--------------------------------------------------- 60W
FRONT AND REAR--------------------------------------------- 20W x 4
CENTER----------------------------------------------------------- 20W
POWER CONSUMPTION------------------------------------- 160W

SPEAKER UNIT

WOOFER--------------------------------------------------------- 6.5″ 6Ω
FRONT------------------------------------------------------------ 3″ 4Ω
REAR-------------------------------------------------------------- 3″ 4Ω
CENTER----------------------------------------------------------- 3″ 4Ω

DIMENSION

SUBWOOFER---------------------------------- 150(W)x385(D)x420(H)(mm)
FRONT ------------------------------------------- 90(W)x105(D)x513(H)(mm)
REAR ------------------------------------------- 90(W)x105(D)x200(H)(mm)
CENTER ----------------------------------------- 90(W)x105(D)x280(H)(mm)

ACCESSORIES

REMOTE CONTROL -------------------- 1 PCS
USER MANUAL -------------------------- 1 PCS
AAA BATTERIES-------------------------- 2 PCS
SPEAKER CABLES----------------------- 3 PCS 2M(CENTER&FRONT)
2 PCS 6M(REAR)

IN ORDER TO DELIVER THE BEST QUALITY, THE SPECIFICATION

OF THE SPEAKER MIGHT CHANGE WITHOUT SUBJECT OF NOTICE.

2

BLOCK DIAGRAM

AMPLIFIER

LED DISPLAY AND

CONTROL POLE

DVD/5.1CH

MCU

STEREO

AUX1

6CH. PRE-AMP.

INPUT SELECT

AUX2

3

TROUBLESHOOTING

ISSUE

No Sound

from Speaker

No sound from speaker

when chose DVD/5.1

output mode

CAUSED BY

1. System does not
connected with power.

2. The speaker cables
are not connected with
the output connector

3. The power does not
switch ON.

The output setting of the

DVD might set to dts

decode mode

SOLUTION

1. Check with the

power plug

2. Check the speaker

cables

3. Make sure the power

is ON

Reset the output setting

to 5.1 CH output only

Distortion occurred

when in high volume

The sound device has
nigh level signal output

4

Turn down the master
volume of the system