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Genius GHT-511D Service Manual

Made by: Genius
Type: Service Manual
Category: Home Cinema speakers
Pages: 14
Size: 0.35 MB

 

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Service Manual 

 

 

GHT-511D HOME THEATER 

 

 

 


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Service Manual 

 

  

               

Table of Contents 

GHT-511D HOME THEATER .................................................................................................... 0 

Chapter 1.    INTRODUCTION........................................................................................................... 2 

Function Block............................................................................................................................. 2 

Chapter 2.    Troubleshooting Guide.................................................................................................... 3 

Chapter 3.    Removal and Replacement.............................................................................................. 4 

Disassemble & Assemble the Fuse .............................................................................................. 4 

Disassemble & Assemble the Rear Cover.................................................................................... 5 

Disassemble & Assemble Amplifier PCBA (SUB)...................................................................... 6 

Disassemble & Assemble the Power Supply PCBA.................................................................... 7 

Disassemble & Assemble the Decoder board .............................................................................. 9 

Chapter 4.    Testing Procedures ........................................................................................................ 10 

Chapter 5.    Important Notes............................................................................................................. 11 

Packing requirement for sending the PCB assembly ................................................................. 11 

Short of spare parts while repairing a speaker ........................................................................... 11 

Chapter 6.    Parts list (Vender’s number) .......................................................................................... 12 

Chapter 7.    Tools .............................................................................................................................. 13 

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Service Manual 

 

  

               

Chapter 1.  INTRODUCTION 

Function Block 

 

 

Signal input 

Front speakers 

Subwoofer  

Center speaker 

AMP PCBA

POWER 

PCBA 

Rear speakers 

Transformer 

Main board 

Decoder 

PCBA 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Chapter 2.  Troubleshooting Guide 

Problems Condition 

Probable 

Reasons 

Solutions 

1.no power 

1.power cable  1.cable broken 

1.replace power cable 

   

2.fuse 

1.fuse broken 

1.replace fuse 

   

3.PCBA 

1.center PCBA NG 

1.replace center PCBA 

2.power PCBA NG 

1.replace power PCBA 

   

   

3.Decoder PCBA NG 

1.replace Decoder PCBA 

2.display L.E.D. unlight  1.cover broken 1.L.E.D. broken or NG 

1.replace L.E.D. 

   

2.PCBA 

1.Decoder PCBA NG 

1.replace Decoder PCBA 

   

   

2.cable broken 

1.replace cable 

3.button NG 

1.button   

1.button NG 

1.replace button 

   

2.PCBA 

1.receiver NG 

1.replace receiver 

   

   

2.cable broken 

1.replace cable 

3.power PCBA NG 

1.replace power PCBA 

   

   

4.Decoder PCBA NG 

1.replace Decoder PCBA 

4.no sound 

1.signal cable 

1.signal cable NG 

1.replace signal cable   

   

2.PCBA 

1.AMP PCBA NG 

1.replace AMP PCBA 

   

   

2.RCA socket NG 

1.replace RCA socket 

5.noise 

1.speaker   

1.speaker NG 

1.replace speaker 

   

2.PCBA 

1.power PCBA NG 

1.replace power PCBA 

   

   

2.AMP PCBA NG 

1.replace AMP PCBA 

 

 

 

 

 

 

 

 

 

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Chapter 3.    Removal and Replacement 

Disassemble & Assemble the Fuse 

Step 1 

Use a screwdriver to 
turn counterclockwise 
and open the fuse’s 
cap. 

Step 2 

Get the Fuse and 
replace it with the 
same rate. 

 

Step 3 

To install the Fuse, 
reverse the steps 
shown above. 

Fuse 

 

 

 

 

 

 

 

 

 

 

 

 

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Disassemble & Assemble the Rear Cover 

Step 1 

Using a screwdriver to loose 12 screws. 
After taking all screws off, you can take up the Rear cover. 
To install the rear cover, reverse the steps shown above. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Disassemble & Assemble Amplifier PCBA (SUB) 

 

Step 1 

*Disassemble the Rear Cover first. 
Disconnect the cables & wires 
*Mark the position of cables & wires 

 

 

Step 2 

To loose 2 screws.(A & B) 

 

Step 3 

To loose 2 screws. After taking all screws 
off, you can take up the Amplifier PCBA 
*To install the Amplifier PCBA, reverse 
the steps shown above. 

 

A

B

 

 

 

 

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Disassemble & Assemble the Power Supply PCBA 

 

Step 1 

*Disassemble the Rear Cover 
first. 
Disconnect the cable. 

 

 

Step 2 

To loose 8 screws. Form A-H. 

 

 

Step 3 

To loose 4 screws. Form I-L. 

 

Step 4 

Unsolder the wires on Power 
Supply PCBA. And remove the 
wires.  
*Mark the position of wires 

Cable

 

G

H

E F 

D

C

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Step 5 

Unsolder the wires on Power 
Supply PCBA. And remove the 
wires.  
*Mark the position of wires 
 

 

Step 6 

Disconnect the 3 cables. *To 
install the Power Supply PCBA, 
reverse the steps shown above. 

Red 

Grey 

White 

 

 

 

 

 

 

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Disassemble & Assemble the Decoder board 

 Step 

Remove the main board. 

 Step 

Use tweezers to remove the fixed 
glue. And then use your hands to 
separate decoder board from 
main board. 
*To install the decoder board, 
reverse the steps shown above. 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Chapter 4.  Testing Procedures 

Step 1 

Connecting the GHT-511D to a DVD or VCD player. Play a DVD disk on it. 

Step 2 

Power on the GHT-511D. The monitor should display ‘321’ then ‘0db’. 
LED display ‘C’, ’L’, ’C’, ’SUB’, ’LS’, ’RS’, ’Digital’, ’Coaxial’, ’Lock’. 

Step 3 

Press the volume +/- button if it changes the volume level of each channel. 

Step 4 

Press the volume +/- button. Set the volume level to 0db.Change input signal to 
‘Line’. The monitor should display ‘0db’.LED display ’SUB’, ’Line’, ’St’. 
The sound only comes from L , R , SUB channel. 

Step 5 

Press the Mode button. LED display ’PL’, ’R’, ’C’,’SUB’, ’LS’, ’RS’, ‘Prologic’, 
‘Line’, ’Lock’. 
The sound comes from 5.1 channel.   

Step 6 

Press the Input button. Change input signal to ‘Optical’. The monitor should 
display ‘321’ then ‘0db’. LED display ’L’, ’R’, ’R’, ’C’,’SUB’, ’LS’, ’RS’, 
‘Optical’, ’Lock’, ‘Digital’ .The sound comes from 5.1 channel. 

Step 7 

Press the mute button it makes the volume level of each channel to null. Press the 
Mute button again .It backs to normal. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Chapter 5.  Important Notes 

Packing requirement for sending the PCB assembly 

PCB assembly is a kind of sophisticated electronic circuit board. Therefore, well packing will 

be required when sending them by post or courier. 

1. 

Some sophisticated IC components are mounted on the PCB assembly, hence it is 

necessary to pack each PCB assembly with a separate static protecting beg, in order to 

avoid static electricity. 

2. 

Reliable external packing is also very important when sending the PCB assembly by post, 

in that it would avoid unnecessarily lost or damage.   

Short of spare parts while repairing a speaker

If you are short of spare parts when you have some speakers waiting to be repaired, it would be 

recommended to take the necessary parts from one speaker, so that you may have the as many 

as speakers be repaired and sent back to your customer, and left only one or few speakers 

waiting for spare parts sending from KYE. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Chapter 6.    Parts list (Vender’s number) 

Item Part 

number 

description 

Position 

1 J66-01236-000 

PCBA 

AMP 

 

2 J66-01236-400 

PCBA 

CENTER 

AMP 

 

3 J66-01335-000 

PCBA 

POWER 

 

 

4 J66-01335-010 

PCBA 

VOLUME 

CONTROL 

   

J83-005AA-U00 

FUSE 125V/5A SLOW BLOW 

 

J51-00002-03 NJM4558DD 

 

J53-00001-02 Diode 

1N4148 

 

J51-01054-000 IC 

TDA7296 

60W 

 

J52-21001-000 Resonator 

4MHZ 

 

10 

J51-01011-000 IC 

TL074/ 

 

11 

J51-11018-000 IC 

L7815 

 

12 

J51-11019-000 IC 

L7915 

 

13 

J51-21006-010 IC 

PT2258 

 

14 

J52-00027-01 Transistor 

2SC1815 

 

15 

J52-31003-000 FET 

2SJ111 

 

16 

J53-21009-000 Diode 

KBU808 

 

17 

J51-11024-000 IC 

L7805CV/ST 

 

18 

J51-21002-300 MPU 

EM78P451P 

 

19 

J52-00026-02 Transistor 

2SA1015 

 

20 

J66-01335-330 PCBA 

DSP 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Chapter 7.  Tools 

 

1. 

VCD or DVD Player 

2. 

MUSIC CD or DVD 

 

1. Soldering-Iron 

(40W) 

 

1. Tweezers 

2. Screwdriver 

3. Pliers 

4. Multimeter 

5. Glue-heater 

 

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