Akai HTA-1150 Service Manual
HOME THEATER SYSTEM
Model:
HTA1150
SERVICE MANUAL
www.akai.ru
CONTENTS
1. Safety precautions......................................2
2. Location of users controls...........................3
3. Connecting to equipment.............................4
4. Trouble shooting guide................................5
5. Internal block diagram of ics.......................7
6. Schematic diagram.....................................20
SERVICE MANUAL
1
1. SAFETY PRECAUTIONS
PRECAUTIONS:
Power supply: This speaker can only use
1.
the type of power supply as specified in
the instruction manual or marked on the
master speaker.
Power line protection: Make sure to avoid
2.
power line being trampled, pulled or
squeezed by heavy objects. In particular,
be sure to hold the plug when pulling the
power line from the socket. Never pull on
the power line. besides, keep the power line
away from hot objects.
Removing cabinet: In case of speaker
6.
failure or problems due to improper
use, don't dismantle the unit to repair
or check by yourself. Please turn off
the power and use after checked by
specialists to avoid causing personal
accident.
Cord polarity: The speaker cord must be
3.
correctly connected as per marking on the
function panel. and Must have
correct polarity so maximize the inherent
quality of the speaker. Otherwise, normal
function and output will be affected.
4.
Ventilation: This speaker has good
adaptability to the environment, but pay
attention to the environmental ventilation
during long periods of work.
5.
Water and moisture: Keep the sound box
away from rain, water spray, water splash
and wet environment, such as bath,
kitchen, water basin, washing basin, damp
basement, swimming pool, etc.
+
-
Appearance cleaning: Don't use
7.
volatile solutions to clean the speaker
to avoid damaging the appearance.
No
Please cut off the power: If you don't
8.
use the sound system for a long time,
please remove the cable wire or
disconnect the power to ensure the
speaker safety and household safety.
SERVICE MANUAL
2
2. LOCATION OF USERS CONTROLS
REAR
RIGHT
S.W.
S.R.
F.R.
R
C.E.
DVD(5.1CH)
S.L.
F.L.
FUSE T1.6A/250V
L
AUX
POWER
ON
OFF
FRONT
RIGHT
FR.
LT.
CENTER
REAR
LEFT
FRONT PANEL INSTRUCTION :
ON
STANDBY
INPUT
SOURCE
SPEAKER
CHANNELS
VOLUME
UP
VOLUME
DOWN
AUX
5.1CH
DVD
NORMAL
PRO.LOGIC
UP
DOWN
ON
STANDBY
SPEAKER
CHANNELS
VOLUME
DOWN
AUX
NORMAL
UP
Power switch button(standby) switch
1
on or off for waiting or on condition
3
Sound field selection
Master volume decrease selection
5
7
AUX signal input indicator
NORMAL sound field indicator
9
Volume increase indicator
11
INPUT
SOURCE
VOLUME
UP
DVD
5.1CH
PRO.LOGIC
DOWN
2
Signal input selection
Master volume in increase selection
4
6
Working /standby indicator
8
DVD signal input indicator
10
Pro.logic sound field indicator
12
Volume decrease indicator
REMOTE CONTROL INSTRUCTION :
STANDBY
INPUT
MUTE
PRESET
SOUND
SW.VOL
C.VOL
S.VOL
8
12 13
9
M.VOL
•••••••
••••
•••••
•• •••
••••••
•• •••••
•• •••••
•••• ••
•••• ••
•••• ••
•••• ••
•••• • •
•••• • •
12
13
BACK PANEL DESCRIPTION:
POWER
DVD(5.1CH)
FRONT
RIGHT
FR.
LT.
CENTER
REAR
RIGHT
REAR
LEFT
OFF
DVD F.R./F.L.INPUT
DVD S.W.INPUT
SPEAKER OUTPUT F.R.
SPEAKER OUTPUT C.E.
SPEAKER OUTPUT S.L.
POWER SWITCH
AUX L/R INPUT
DVD S.R./S.L.INPUT
DVD C.E.INPUT
SPEAKER OUTPUT F.L.
SPEAKER OUTPUT S.R.
FUSE T1.6A/250V
POWER
FUSE T1.6A/250V
SERVICE MANUAL
3
3. CONNECTING TO EQUIPMENT
REAR
RIGHT
S.W.
S.R.
F.R .
R
C.E.
DVD(5.1CH)
S.L.
F.L .
FUSE T1.6A/250V
L
AUX
POWER
ON
OFF
FRONT
RIGHT
FR.
LT.
CENTER
REAR
LEFT
SYSTEM CONNECTION:
Center
CD
Front left
Rear left
DVD player
L
R
AUX
F.L .
S.L.
DVD(5.1CH)
FRONT
RIGHT
FR.
LT.
CENTER
REAR
RIGHT
REAR
LEFT
Front Right
SL
FL
CEN
SW
SR
FR
Rear right
FUSE T1.6A/250V
OFF
POWER
,
SERVICE MANUAL
4
4. TROUBLE SHOOTING GUIDE
TROUBLE SHOOTING AND RESOLUTION
1
No sound
No sound in AC-3./5.1
NORMAL state
2
check whether the vice-level
I alternating voltage8V
of transformer is ok or not.
OK
check whether the current
transfer output voltsd. is ok
or not.
OK
check whether the power
voltage 5.1V of 1IC3,1IC4,
4053 are ok or not.
OK
judge whether 1C3,-IC4
are ok or not
NOT
replace the
transformer
check whether the
NOT
capacitor 2CD3,
IC 7805 are ok or not.
check whether
NOT
the 2CD4are ok or
not.
NOT
replace IC3,IC4
No sound
sound is ok in AC-3 state,
but no sound in AUX stereo
check whether the 1IC4052
power voltage 5.1V is ok or
not.
OK
judge whether the 1IC10 4558,
is ok or not by inputing signal
Check whwther 2CD11,
2CD12 are ok or not
NOT
check whether the
capacitor 2CD3,
IC 7805 are ok or not.
NOT
replace 1IC10
4558,
NOT
replace 2CD11,
2CD12
SERVICE MANUAL
5
4. TROUBLE SHOOTING GUIDE
TROUBLE SHOOTING AND RESOLUTION
4
check whether the fuse 1.6A is OK or not.
check whether there is 230V alternating
current of the transformer in elementary.
check whether there is 14V*2,11V*2 8.5V alternating
voltage output in the transformer vice-level 2 or not.
dried machine
5
Error
Possible reason
OK
OK
BURNED OUT
NOT
NOT
replace the fuse 1.6A.
check the plug,power
buttonare all right or not.
replace the transformer.
Obivating
No sound
The power plug is not exactly inserted.
The connection of output and input is not well
The input format is not right
The volume control be settled in the minimum
Rest estate
Insert the plug in right place
Connect the output and input
cables
Adjust the volume
SERVICE MANUAL
6
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