Witam, kupiłem w/w wzmacniacz, miał uszkodzony jeden z tranzystorów sterujących bramki mos`ów w przetwornicy. Wymieniłem mosy tranzystory i nawet układ 494CN. Wzmacniacz się włącza przetwornica daje napięcie, prawy kanał gra ok jednak w różnym czasie (ok.20-30s) w głośniku z lewego kanału wydobywają się dziwne piski, syki i brzęczenia. W tym samym czasie kanał prawy nadal gra ok. Zauważyłem, że po podłączeniu wzmaka cały czas stopniowo wzrasta pobór prądu zaczyna od 0,5A i rośnie do ok 0,57A i w tym momencie pojawiają się te dziwne dźwięki a prąd zaczyna wariować. W niedługim czasie po podłączeniu również tranzystory Q4 2SA1015 i Q16 2SC1815 gotują się. Końcówki są dobre zamieniałem lewa strone z prawą to samo z tymi tranzystorami wszystkie inne sprawdzałem miernikiem tak samo jak diody i rezystory. Kondensatory sprawdzone mostkiem. Nie wiem czego sie już przyczepić wydaje się jakbym wszystko już sprawdził a on dalej nie działa. Proszę o pomoc i z góry dziękuje. Zauważyłem również że podczas pojawiania sie tych dźwięków w pokazanym poniżej rysunku woltomierz wskazuje mi 1V jak wzmak działa poprawnie to cały czas jest 0V. Na rysunku narysowane są końcówki mocy.
1
2
3
4
5
6
7
8
D
D
R15
R14
100K
100K
C5 223 C4
R11
1K2
C11
22u/25
223
R19
82K
SW1A
SW2*6
R18
10K
15Hz/12dB
3 "
SW3B
SW2*6
4u7/50
R26
6
U1B
7
47K
-15V
C
+15V
R4 3
5K6
1
R21
JRC4558
3
W4A
27K 2
250KC
C10
183
LPF
40Hz~300Hz
U5A
1
1
-15V
HP
LP
OFF
SW2A
SW3*8A
3
2
47K
JRC4558
5
U2B
6
LCH-Out
4
7
C19
334
47K
C20
124
R2 3 "
8K2
R34
27K
R37
C21
104
C22
154
1 "
5
W3B
50KC
6
C15
47PF W1A
10KC
2
R27
R31
100K
C18
223
47K
100K
C17
223
3
B
R28
5K1
R24
1K2
1 "
W2B
500KC
C16
473
3 " R25
6
R30
5
JRC4558
U3B
2 "
2 "
1
1 "
27K
3 "
SW2B
SW3*8A
2 "
RCH-Out
JRC4558 4 "
U4B
7
1
C1
RCH
1 "
R29
JRC4558
5
8
2
+15V
U4A
C9 183
2
3
R23
56K
C3
473
W2A
500KC 3 R10
27K
0dB~12dB
at 45Hz
ON
OFF
R33
R9 1K
R8 1K
3
JRC4558
1 1
U3A
2
2
1
2
W3A
50KC
HPF
40Hz~300Hz
+15V
JRC4558
3
4
-15V
3 "
R22
4K7
AV1
INP-4
8K2
27K
-15V
82PF W1B
10KC
2 "
GAIN
0.4~4V
C
R17
1
8
-15V C12
C13
334
3
C7
154
4
R12
47K
2
JRC4558
1
U2A
R1
2
4
R7
100K
3
47K
1 "
U1A
1
47K
C6
124
2 "
2
SW3A
SW2*6
+15V
R13
4
3
R16
8
+15V
JRC4558
3
8
2
R20 27K
C8
104
8
C2
4u7/50
4
LCH1
2 CH
1 CH
7 1 "
2 "
3 "
R36
82K
R35
10K
SW1B
SW2*6
R3 3 "
5K6
R32
56K
W4B
250KC
C23 183
1 " R38
27K
C24
183
5
6
JRC4558
U5B
7
B
C14
22u/25
2 "
27K
A
A
Title
Size
A3
Date:
File:
1
2
3
4
5
6
RX22.PRE-SYSTEM.SCH
Number
6-Apr-2007
F:\DE\RX\RX44.Ddb
7
Revision
A01
of
Sheet
By:
Drawn
8
1
2
3
4
5
6
7
8
D
D
+15V
D3
R86
4148 R74
47K
D4
4148
+VCC
220R
R84
A1015
D6
4148
R47
R45
Q19
100R
+24V
47R
1K
Q27
C1815
Q4
A1015
R49
1K
LCH-in
Q6
C33
C1815
R50
9K1
R48
102
39R
R46
Q3
R41
47R
101
C1815
C31
C
Q5
Q1
R69
C2383
R44
C35
D5 C39
4148 47u/25
C
0.1R/5W
R72
Q13
104
1K5
R62
56K
3K9
220R
C1815
LCH-Out
R88
R91
39R
Q17
R93
D1
Q7
100R
-VEE
A1015
C1815
R61
4148 47K
R63
220R
D2
56K
R80
47R
C37
101
R102
15K
Q15
R83
3R
56K
DC.Pro-L
C57
104
Q25
A1013
R106
R141
5R6
0.1R/5W
R89
2K2
Q18
A1015
R70
R79
39R
SH.Pro-L
10K
R73
3R
R68
39R
C5198
R100
A1941
Q16
C1815
R90
1K
R92
47R
4148
-24V
-15V
R42 10K
C28 5P
R43
C27
3K
100u/25
B
B
2CH
2CH AMPLIFIER
RCH-in
RCH-Out
R104
DC.Pro-R
56K
Protect-RCH
A
A
Title
RX22.AMPLIFIER.SCH
Size
A3
Date:
File:
1
2
3
4
5
6
Number
6-Apr-2007
F:\DE\RX\RX44.Ddb
7
Revision
A01
of
Sheet
By:
Drawn
8
1
D
2
3
4
U6
KPC117
Q36
A1015
VCC
R129
REM
10K
R124
3K3
Q37
C1815
D12
IN4001
Q30
A1015
SH.Pro-R
R5
1K5
R114
4K3
R116
10K
R*
1K
R115
220K
LED1
PRO.Red
R117
4K3
Q33
C1815
Q31 Q34
C1815
C1815
C49
10u/16
R119
10K
R109
C46
220u/16 10K
C
D
-VEE
D11
4148
DC.Pro-L
DC.Pro-R
8
R134
56K
Q32
C1815
R127
10K
7
R6
C47
10u/25
SH.Pro-L
6
+VCC
Q35
C1815
1K
R118
10K
R81
5K6
R1081K
R121
10K
5
C50
D10
220u/25 4148
C
LED2
POW.Green
D13
4148
9
10
11
12
13
14
15
R120
47R
R111
1
TH1
15K
R130
56K
D14
4148
2
3
E1
E2
GND
D16
4148
C1
8
7
C2
RT
6
VCC
5
CT
OC
DTC
COMP VREF
3
2
R131
150K
R137 15K
C52
102
B
4
-
+
1
+
C51
10u/16
D15
4148
+14.4V
DZ5
39V/0.5W 4
+24V R39
7
6
C45
102
IRFZ44NIRFZ44N
M3
M4
C43
C44
2200u/50 2200u/50
C41
C42
2200u/50 2200u/50
+15V
330R/5W
DZ1
15V/1W
R40
DZ2
15V/1W
C25
220u/16
C26
220u/16
-15V
-24V330R/5W
5
R139
C53
10R 1/2W 103
R135
47R
Q40
R132 R126
A1015 220R
47R
R138
1K
8
IRFZ44N IRFZ44N
M1
M2
R112
Q39
A1015 220R
R133
1K
DL1
F12C20C
R105
47R
U7
TL494
10R 1/2W
T1
T36-36V-6T
DZ4
39V/0.5W
220R/1W
16
D9
4148
R125 R128
2K2 56K
C48
103
R107
DL2
F12C20A
B
RS1
+VCC
+14.4V
40A*2
R136
56K
C55
C54
D17
2200u/352200u/35 IN5401
A
A
Title
RX22.POW-SYSTEM.SCH
Size
A3
Date:
File:
1
2
3
4
5
6
Number
6-Apr-2007
F:\DE\RX\RX44.Ddb
7
Revision
A01
of
Sheet
By:
Drawn
8
Spare part list
Product Name: Car Amplifier
Brand Name : Magnat
Serial number
Types
Description of components
001
PCB
002
Safety
components
PCB
Coils
Fuse
Fuse Holder
RCA socket
Model No: RX22
Rev.
: A01
Comment
Quantity
RX22:PCB-A01
φ36
20A
Two way
1
2
1
IC
Terminals
1
1
Direct-Pulling Switch
SK23D25G10
1
2
F4558
PC817
TL494
IRFZ44N
A1015
5
1
1
4
11
C1815
004
Inserting
components
1
three way
four way
SK22H13G10
003
AV4-7
17
A1013
C2383
9014
A1941
C5198
F12C20A
F12C20C
IN4001
IN5402
IN4148
φ3
15V/1W
39V/0.5W
3
2
2
2
2
1
1
1
1
15
2
2
2
IC
MOSFET
Triodes
005
Transistor
Schottky Barrier Rectifier
Rectifier Diodes
Switch Diodes
LED
Voltage Stabilizing Diodes
Unit
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
Components
T1
AV1
U1, U2, U3, U4, U5
U6
U7
M1, M2, M3, M4
Q4, Q11, Q17, Q18, Q19, Q20, Q21, Q22, Q30, Q39, Q40
Q13, Q14Q5, Q6, Q7, Q8, Q9, Q10, Q16,Q23, Q27, Q28, Q32, Q33, Q35,Q37,
PCS
Q38
PCS Q15, Q24, Q36
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
Q3, Q12
Q31, Q34
Q25, Q26
Q1, Q2
DL2
DL1
D12
D17
D1, D2, D3, D4, D5, D6, D7, D8,D9, D10, D11, D13, D14, D15,D16
led1,led2
DZ1, DZ2
DZ4, DZ5
Page 1 of 4
Spare part list
Product Name: Car Amplifier
Brand Name: Magnat
Serial number
Types
Description of components
Model No: RX22
Rev.: A01
Resistors
006
Resistors
Trimmers
Quantity
Unit
Components
RTH-15K
RTX-5W-0.1Ω
RTX-3W-330Ω
RTX-1W-220Ω
RTX-1/2W-5.6Ω
RTX-1/2W-10Ω
RTX-1/2W-3Ω
RTX-1/8W-0Ω
RTX-1/8W-39Ω
RTX-1/8W-47Ω
RTX-1/8W-100Ω
1
4
2
1
2
2
4
3
8
13
4
8
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
RTX-1/8W-220Ω
Thermal Resistors
Comment
15
PCS
with metal " Y "
R60, R62, R82, R88
R39, R40
R105
R141, R142
R107, R139
R41, R67, R83, R99
J18, J28, J29
R46, R48, R53, R55, R91, R93, R94, R96
R47, R54, R65, R69, R77, R80, R92, R95, R111, R120, R123,R126, R135
R70, R71, R84,R85
R72, R76 ,R63, R64, R86, R87, R112, R132
R6, R8, R9, R45, R49, R52, R56, R90, R97, R108, R110, R122,R133,
R138, R140
RTX-1/8W-1KΩ
RTX-1/8W-1.2KΩ
RTX-1/8W-1.5KΩ
RTX-1/8W-2.7KΩ
RTX-1/8W-3KΩ
RTX-1/8W-3.3KΩ
RTX-1/8W-3.9KΩ
RTX-1/8W-4.3KΩ
RTX-1/8W-4.7KΩ
RTX-1/8W-5.1KΩ
RTX-1/8W-5.6KΩ
RTX-1/8W-8.2KΩ
RTX-1/8W-9.1KΩ
15
PCS
2
3
2
3
1
2
2
1
1
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
RTX-1/8W-10KΩ
RTX-1/8W-15KΩ
RTX-1/8W-27KΩ
RTX-1/8W-47KΩ
RTX-1/8W-56KΩ
RTX-1/8W-82KΩ
RTX-1/8W-100KΩ
RTX-1/8W150KΩ
RTX-1/8W-220KΩ
WH130-15-axis-A10KΩx2
WH130-15-axis-C50KΩx2
WH130-15-axis-C200KΩx2
WH130-15-axis-C500KQx2
3
PCS
2
2
PCS
PCS
13
PCS
3
8
9
12
2
5
1
1
1
1
1
1
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
R6, R8, R9, R45, R49, R52, R56, R90, R97, R108, R110, R122,R133,
R138, R140
R11, R24
R5R73, R75
R78, R79
R43, R58, R125
R124
R66, R68
R114, R117
R22
R28
R3, R4, R81
R1, R2
R50, R51
R18, R35, R42, R59, R100, R101,R109, R116, R118, R119, R121,R127,
R129
R102, R103, R137
R10, R17, R20, R21, R25, R34,R37, R38
R12, R13, R16, R26, R27, R29,R33, R61, R74
R23, R32, R44, R57, R89, R98, R104, R106, R128, R130, R134,R136
R19, R36
R7, R14, R15, R30, R31
R131
R115
Page 2 of 4
Spare part list
Product Name: Car Amplifier
Brand Name: Magnat
Serial number Types Description of components
Electrolytic capacitors
Ceramic Electric Capacitors
007
capacitors
Squareness Capacitors
Polyester Capacitors
CBB
Capacitors
colour capactiors
008
Connecting
line
J line(Φ0.65mm)
Model No: RX22
Rev.: A01
Comment
Quantity
Unit
4u7/16v
10U/16V
22u/25v
100u/16v
220U/16V
2200u/35v
47P
82p
101
104
124
154
183
223
334
473
102
103
104
102
5P
102
6mm
7mm
8mm
9mm
10mm
12mm
13mm
14mm
15mm
2
3
4
2
4
6
1
1
4
2
2
2
4
4
2
2
1
2
3
1
2
2
23
4
6
5
4
3
2
13
6
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
Components
C1, C2
C51 C47, C49
C11, C14, C39, C40
C27, C30
C46, C50C25, C26
C41, C42, C43, C44, C54, C55
C15
C12
C33, C34, C37, C38
C8, C22
C6, C20
C7, C21
C9, C10, C23, C24
C4, C5, C17, C18
C13, C19
C3, C16
C45
C35, C36,C48, C53
C56, C57, C58
C52
C28, C29
C31, C32
Page 3 of 4
Spare part list
Product Name: Car Amplifier
Brand Name : Magnat
Serial number
Types
Description of components
Specifications & Model No.
Quantity
Unit
Amplifier Keep Plate
25×11×2
32×17×2
1
1
1
1
3
2
Screw
TCT3×5
TCA3×8
TCA3×10
BT3×12
BT3×4
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
PCS
Aluminum Shell
Front Panel
Rear Panel
Bottom Panel
009
hardware
Meson
Flexibility Meson
Polybag
010
011
012
Plastics
Package
Accessories
Model No: RX22
Rev.: A01
components / Remark
mica plates
Coils pad
Knob
Switch Catton Pad
Poly-form
Fuse
Screw
Meson
Flexibility Meson
User's Manual
Gift Box
RCA Jacks Covering
Groundwire Solder Plate
Tube
Glue
Tin
Φ3
Φ3
70×50mm
370×320mm
middle
small
Φ36
6
8
5
5
5
6
6
1
1
4
6
Mp2000
1
4
3
1
20A
BA4X10
2
2
Φ5
Φ5
RX22
RX22
4
4
1
1
φ5
4
1
/
few
Page 4 of 4