akira HTS-518DVD User manual

Home Theatre System
Service Manual

-2-
Model No.: HTS-518DVD
Version: 1.0
MODEL:
HTS-518DVD

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Model No.: HTS-518DVD
Version: 1.0
CONTENTS
TROUBLE SHOOTING .......................................................................................................................... 4
CIRCUIT DIAGRAM.............................................................................................................................. 8
EXPLODED VIEW.................................................................................................................................. 9
PART LIST............................................................................................................................................. 10

-4-
Model No.: HTS-518DVD
Version: 1.0
TROUBLE SHOOTING
STOP WORKING
Plug is not inserted tightly?
Fuse is burnt-out?
Whether transformer has
voltage output?
Whether the voltage output
of ICU8 is 5 V?
ICU8 is not correctly
installed.
Re-insert the plug
Replace fuse
Replace transformer
Voltage is normal after
removing IC
Uninstall IC and then
re-insert it correctly
OK
OK
OK
OK
OK
Replace
ICU8
YES
YES
YES
YES YES
YES

-5-
Model No.: HTS-518DVD
Version: 1.0
Check whether ICU11-U153-5
works suitably under 16V?
RELAY is
activated?
Check whether
R64 works
under 12V?
Replace
RELAY
ICU18’s working
voltage is normal?
IC foot is not
soldered tightly Re-solder IC OK
Whether RELAY
2-3 is activated?
NO OUTPUT
Replace ICU11 or
U15 OK
OK
YES
YES
YES
YES
NO
NO
NO
NO

-6-
Model No.: HTS-518DVD
Version: 1.0
REMOTE CONTROL
UNWORKABLE
Sensor is loosely soldered? Re-solder it. OK
Check sensor, test whether
remote control works normally
after raising voltage by 5V?
Whether the voltage is normal
after removing the sensor? Replace sensor
Check whether the voltage
supply of display panel is cut
off?
Replace the row wires of display
panel OK
OK
YES
YES
YES
NO
NO

-7-
Model No.: HTS-518DVD
Version: 1.0
NO DISPLAY
Test whether U8’s
output is -5V?
Row wires of display panel are
not inserted tightly?
ICU10 is not inserted
suitably
Replace ICU8
Reinsert the IC tightly
OK
OK
YES
YES
NO
NO

-8-
Model No.: HTS-518DVD
Version: 1.0
CIRCUIT DIAGRAM

-9-
Model No.: HTS-518DVD
Version: 1.0
EXPLODED VIEW

-10 -
Model No.: HTS-518DVD
Version: 1.0
PART LIST
No Part name
1 Volume knob
2 Front panel
3 Button
4 Volume switch
5 Control PCB
6 Power knob
7 Power switch
8 Heat sink
9 AMP PCB
10 Bottom case
11 Input PCB
12 Rear panel
13 FM /AM
14 Output PCB
15 Top cover
16 Fuse holder
17 AC cord
18 Transformer