akira HTS-292-998 User manual

Home Theatre System
Service Manual

-2-
Model No.: HTS-292-998
Version: 1.0
MODEL:
HTS-292-998

-3-
Model No.: HTS-292-998
Version: 1.0
CONTENTS
TECHNICAN SPECIFICATION ............................................................................................................. 4
IMPORTANT SAFETY MEASURES ..................................................................................................... 5
TROUBLESHOOTING ........................................................................................................................... 7
CIRCUIT DIAGRAM .............................................................................................................................. 9

-4-
Model No.: HTS-292-998
Version: 1.0
TECHNICAL SPECIFICATION
Description Details
Power supply standard ~110V/220-240V 50Hz/60Hz
Main channel output 50W x 2 (4 ohm / 1K / THD=2%)
Center channel output 10W (4 ohm / 1K / THD=10%
SURR channel output 10W x 2 (4 ohm / 1K / THD=10%
Channel separate rate ≥35dB
Harmonic distortion ≤2%
Frequency response 20Hz~20KHz (±2dB)
Input sensitivity 250mV
Weight 5kg
Measurement 430 x 330 x 60(mm)

-5-
Model No.: HTS-292-998
Version: 1.0
IMPORTANT SAFETY MEASURES
Before using this machine, please read all the safeties and operating instructions, please abide by all
the warnings on the machine and operating instructions. Meanwhile, please observe all the indications
about safe operating.
1. Protection of electric power supply line
Be aware that the electric power supply line is not tramped, orpressed by heavy objects. Pay
more attention to the plug of power supply line and the outlet in the machine.
Do not lengthen the electric lines or make outlet overload, due to the danger of catching fire
or getting electric shock.
Do not pull or drag the power supply line.
2. Ventilation
The groove on the casing of the machine is to ensure safe action on it and protect it from
overheating. This groove must NOT be blocked or covered.
This set must be put in ventilated place.
DO NOT put any object on it or cover it with cloth.
The distance away from the wall should not be less than 10 centimeters.
3. Electric shock
Prevent objects or liquid from dropping into the mchine from the groove. If metal objects,
even a hairpin or a needle drop into it, electric conduction will happen and the danger of
getting electric shock is quite possible.
So families with children should prevent children from putting anything, especially metal
into the inner machine.
4. Repairing
The user should NOT do any repairing work except in the range stipulated in the instructions.
Various repairing work outside the range should be entrusted.
To recognized repairing workers.
5. Casing dismantling
DO NOT dismantle the casing. If one touches the inner components, he may properly get
serious electric shock.
6. Electric alternating output plug
The electric alternating output plug in the rear panel should NOT insert neither speaker
equipment with higher rated power nor home appliance, such as electric iron, bread toaster,
in prevention of causing fire or electric shock.

-6-
Model No.: HTS-292-998
Version: 1.0
7. Unusual smell
When discover unusual smell and smoke, cut off the power supply immediately and pull the
plug out off the outlet on the wall.
8. Problem need repair
When the listed problems occur, recognized workers must be entrusted to repair the set.
a. Damage of electric power supply line or plug.
b. Object or liquid dropped into the machine.
c. Showered by rain
d. Working unusually even after repairing under the operating instruction. The
machine cannot resume normal working until it is examined and repaired
thoroughly.
e. The machine dropped from high place or the casing is damaged. The function of the
machine change noticeably.

-7-
Model No.: HTS-292-998
Version: 1.0
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE REMEDY
Press POWER/ON, this unit
is not turned on.
The cord is not plugged in or not
completely plugged in.
Plug in the cord firmly.
This unit does not operate
normally
May be greatly influenced by
some loud external noise (like
lightening or excessive static) or
any wrong operations occurs in
using.
Turn off the unit to get it in
standby mode. Unplug the
power cord.
The output cord is not connected
right.
Connect the cord correctly. Or it
many damage the cord.
The function is set to be operated
manually or the right input source
is mot selected.
Select the correct input source
or set the system to be auto
operating.
No sound is heard or no
picture is seen
The speaker is not connected
firmly
Connect firmly.
Check that the volume in each
channel are the same.
Adjust to the right place.Sound can only be heard from
one side of the speakers.
The cord is not connected
correctly.
Connect the ground cord
correctly. If the problem
persists, the speaker cord may
have been damaged.
No sound from the front
speaker.
The cord is not connected
correctly.
Connect the speaker cord well.
The volume is adjusted to the
minimum.
Increase the volume.No sound from the center
speaker
The cord is not connected well. Reconnect the cord.
The volume is adjusted to the
minimum.
Increase the cord well.No sound from the subwoofer.
The cord is not connected well. Connect the cord well.
The cord is not connected well. Connect the cord firmly. If the
problem persists, the cord may
have been damaged.
No sound from the surround
speaker
The cord is not connected well. Connect the cord firmly.
The remote control is out of
work.
The battery may be too weak. Change the battery.

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Model No.: HTS-292-998
Version: 1.0
PROBLEM POSSIBLE CAUSE REMEDY
An obstacle is in the way. Move the obstacle.
It many be in wrong operating place. The maximum operating range
of the remote control is 6m
within an angle of 30 degrees
from the axes of the front panel.
The remote control does not
work well.
The remote sensor is in direct
sunshine or light (like duophase
fluorescent lamp).
Change the position of the unit.

1 2 3 4 5 6 7 8
A
B
C
D
87654321
D
C
B
A
EA/VP
31
X1
19
X2
18
RESET
9
RD
17
WR
16
INT0
12 INT1
13
T0
14 T1
15
P10
1
P11
2
P12
3
P13
4
P14
5
P15
6
P16
7
P17
8
P00 39
P01 38
P02 37
P03 36
P04 35
P05 34
P06 33
P07 32
P20 21
P21 22
P22 23
P23 24
P24 25
P25 26
P26 27
P27 28
PSEN 29
ALE/P 30
TXD 11
RXD 10
U?
8751
1 2 3 4 5 6 7 8 9 10 11
12
13
14
15
16
17
18
19
20
21
22
23 24 25 26 27 28 29 30 31 32 33
34
35
36
37
38
39
40
41
42
43
44
CS16360
VFD-ZYC3316-1A01
D+5V
-VEE 10K
D+5V
P3.0
P1.3
P3.1
1
2
3
4
5
CON2
D+5V
22KX3
220X2
10KX3
D+5V
P3.0
P3.1
P1.3
15P 15P
Vin
1
GND
2
Vout 3
7805
12M
D+5V
4K7
4148
10U
4K7
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
10KX8
123
100
100U/16V
1
2
3
4
5
CON1 4007
4007
330U/35V
100U/50V
100U/16V
680
680
10U/35V
5V1
100X2
D+5V
-VEE
F2
F1
F1 F2
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
10KX8
D+5V
1 2 3 4 5 6 7 8 9
10
11
12 13 14
CON14
+V
220X2
10KX3
D+5V
AGND DGND
1030
5V6
5V6
24V
10V
0V

1 2 3 4 5 6 7 8
A
B
C
D
87654321
D
C
B
A
2K2
2K2
10K
10K
220K
5K6
D5SB_40
6800U/63V
6800U/63V
+34V
-34V
D5SB_40
3300U/25VX2
+16V
-16V
1
3
4
3PIN
1
3
4
3PIN
4007 4007
47U/25V
4148
47U
9014
5V1
9015 223
5401X2
8050
4007
+16V
-16V
5551X2
5401X2
47U
47U
2K2
9V1
9V1
2K2
47U
47U
4U7X8
15KX8
2U2
P+8V5
22U
2U2
104
104 104
5K6
104
104 104
5K6
272
272
4U7
4U7
PT2314
1U
1U
2K2
1K
P+8V5
47U 104 104 104
10K
272
1U
1U
PT2315
123
4
5
6
7
9
11
1213
1415
16
17
18 19 20
12
3
45678
9
10 11 12
13
14
15
16 1718 1920
2122
23
24
25 26 27
28
X0
12
X1
13
Y0
2
Y1
1
Z0
5
Z1
3
INH
6
A
11
B
10
C
9
VEE
7
X14
Y15
Z4
U?
4053
9014
220U
2K2
5V6
100U
M+5V(M62429)
+8V5
-8V5
+16V
9014X2
100U
2K2
9V1
100U
P+8V5(PT2314/5)
SL
SR
CEN
1 2 3 45
6 7 8
U?
M62429/A
1 2 3 45
6 7 8
M62429/B
2K2
2K2
2K2
47K
47K
47K
2U2
2U2
2U2
SWI 4K7
47K
100 +16V
M+5V
M+5
22K
22K 10U
10U
9014
+8V5
-8V5
4K7
2K2
4U74U7
33K 470K
3
2
1
411
A
324b/1
5
6
7
B
324a/2
10
9
8
C
324A/3
12
13
14
D
324A/4
223 223
82K
82K
683 683
152
152
154
154
82K
82K
10K
10K
10K
10K
+8V5
-8V5
1K
1K
1K
1K
4148
4148
4148
4148
2U2X410KX4
3
2
1
411
A
324a/1
5
6
7
B
324A/2
10
9
8
C
324B/3
12
13
14
D
324B/4
682 682
82K
82K
272 272
681
681
150K
390K
1K5
56K
10K
10K
+8V5
-8V5
1K
1K
1K
4148
4148
4148
2U2X310KX3
18P
75K
100K
4K7
4K7 1U
3
2
1
84
IC2A
4558
5
6
7
IC2B
4558
10K
-8V5
+8V5
15K
2U2
1K
47P
1 2 3 4 5 6 7 89
10 11 12 13 14 15 16
PT2399
X0
13
X1
14
X2
15
X3
12
X4
1
X5
5
X6
2
X7
4
INH
6
A
11
B
10
C
9
VEE
7
X3
U?
4051
10K
10K 10K
10K
10K
561 561
823 823
?
103
+8V5 47U
39K
18K 68K
9014 9014
10K
10K
104X2
101
15K
12K
15K
1U
1031U
2K7
10K
2K2 1U
MIC1
MIC2
1
2
3
4
5
5PIN
1
2
3
4
5
5PIN
47K
10K
1U
2K2
OK1 OUT
OK2 OUT
10U
PR
3
2
1
84
IC4A
4558
5
6
7
IC4B
4558
10K 22K
101
10U
10K
82K
221
+5V
-5V
104
104
100
SWO
1K
1K
1K
102
102
102
AMP_CEN
AMP-SR
AMP_SL
1K
1K
+8V5
10K
3
2
1
84
IC3A
4558
5
6
7
IC3B
4558
10K
820K
+8V5
-8V5
33K
153
9014 9014
22K
22K
22K 22K
100
+8V5
P2.2
P2.0
P2.4
P2.3
P2.1
R
R
R
R
L
L
L
47KX8
P2.5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CON14
P2.7
P2.6
P2.5
P2.4
D+5V
P2.2
P2.1
P2.0
P2.3
P3.3
P3.4
P3.5
P1.7
P3.5
P1.7
AGND DGND
P3.3
P3.4
P3.5
P2.7
100K
-8V5
3
2
1
84
IC1A
4558
5
6
7
IC1B
4558
47K
+8V5
12K
1K
47P
47P
47K
12K
100K
1K 561
561
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
TDA1308A
+5V
104
OK DEL1
OK DEL2
AC-3CONT
2R2
1U
22K
473
360K
4K7
33K
56K
33K
9014
56K
OK1 IN
OK2 IN
1K
1K
10U
10U
AMP_R
AMP_L
P2.6
OK DEL2
OK DEL1
220X2
220U
5V1
J1 J2
104X3
10U
104
2U2
TUNER
L
TAPE
VCD
DVD
1K
10K 47K
47U 13V
28V
0V
0V
13V
28V