Genius GHT-511D User manual

Service Manual
GHT-511D HOME THEATER

ServiceManual
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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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.
C L
K
D
E
F
G
B
A
H
J
I
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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 theAmplifier 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
GH
E F
D
C
B
A
I K
J L
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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 1
Remove the main board.
Step 2
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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