Akai ACA-2624 User manual

SERVICE MANUAL
ACA-2624
POWER AMPLIFIER

Circuitry Frame ACA-2664
ACA-2624
IC302B IC303B IC303A POWER
AMP
SW301B
RL-OUT RR-OUT
57
LPF
HPF
OFF
31
75
VR302A VR303D VR303C
IC302A IC403B IC403A SW301A
5731
LPF
HPF
OFF
31
75
VR302B VR303B VR303A
+12V
D.C.
REM
F01
T07
T08
T01-04
T09,T10
T11-T16
T100,T200
T300,T400
T01
IC02
IC03
VEE
VCC
+/-15
T17 T166,T167
T266,T267
T366,T367
T466,T467
PTOTECT
MUTE
CONTROL
TRANS & REGULATOR
POWER
REGULATOR
IC01
POWER
CONTROL
RL-IN
RR-IN VR301B
VR301A IC301A
IC301B
21
POWER
AMP
T451-T457
T458-T461
T462-T465
IC102A IC103A IC103B POWER
AMP
SW101B
FL-OUT FR-OUT
31
LPF
HPF
OFF
57
13
VR102B VR103D VR103C
IC102B IC203A IC203B SW101A
5757
LPF
HPF
OFF
57
13
VR102A VR103A VR103B
CROSSOVER
@ 50Hz
L-IN
R-IN VR101B
VR101A IC101A
INPUT
AMP
IC101B
21
BOOST0-12dB
30Hz-5KHz 12dB/OCT VARIABLE
T151-T157
T158-T161
T162-T165
POWER
AMP
T351-T357
T358-T361
T362-T365
T251-T257
T258-T261
T262-T265
T22,T23

12345678
A
B
C
D
8
7654321
D
C
B
A
R108
56K
R105
56K
IC101A
1/2 4558
IC102A
1/2 4558
R101
1K
R103
1K
R106
10K
C102
102(C)
C103
563(M)
R104
10K
R110
56K
C106
104(M)
C107
563(M)
VR103B
C100K
VR101B
B20K
R107
1K
C105
563(M)
C101
4.7uF/50V
R112
10K
R113
10K
R111
1K
R109
68K
R115 1K
R11422K
C109
104(M)
C108 563(M)
C104
563(M)
VR102B
500KB
VR103D
C100K
HI
OFF
LO
FL
AV4-8.4-13
R208
56K
R205
47K IC203A
1/2 4558
IC101B
1/2 4558
IC102B
1/2 4558
R201
1K
R203
1K
R206
10K2
C202
102(C)
C203
563(M)
R204
10K R210
56K
C206
104(M)
C207
563(M)
VR103A
C100K
VR101A
B20K
R207
1K
C205
563(M)
C201
4.7uF/50V
R212
10K
R213
10K
R211
1K
R209
68K
R215 1K
R214 22K
C209
104(M)
C208
563(M)
C204
563(M)
VR102A
500KB
VR103C
C100K
IC203B
1/2 4558
HI
OFF
LO
FR-AMP
FR
AV4-8.4-13
R308
56K
R305
56K
IC303B
1/2 4558
IC301B
1/2 4558
IC302B
1/2 4558
R301
1K
R303
1K
R306
10K
C302
102(C)
C303 563(M)
R304
10K
R310
56K
C306
104(M)
C307
563(M)
VR303B
C100K
VR301B
B20K
R307
1K
C305
563(M)
C301
4.7uF/50V
R312
10K
R313
10K
R311
1K
R309
68K
R315 1K
R314
22K
C309
104(M)
C308
563(M)
C304
563(M)
VR302A
500KB
VR303C
C100K
IC303A
1/2 4558
HI
OFF
LO
RL
AV4-8.4-13
R408
56K
R405
47K
IC403B
1/2 4558
IC301A
1/2 4558
IC302A
1/2 4558
R401
1K
R403
1K
R406
10K2
C402
102(C)
C403
563(M)
R404
10K
R410
56K
C406
104(M)
C407
563(M)
VR303A
C100K
VR301A
B20K
R407
1K
C405
563(M)
C401
4.7uF/50V
R412
10K
R413
10K
R411
1K
R409
68K
R415 1K
R414
22K
C409
104(M)
C408
563(M)
C404
563(M)
VR302B
500KB
VR303D
C100K
IC403A
1/2 4558
HI
OFF
LO
RR-AMP
RR
AV4-8.4-13
RL-AMP
FL-AMP
D151
1N4148
R174
1K5
R160
100
R159
100
R158
100
R157
100
R151
22K
C155
15(C)
C156
100uF/25V
R163
560
C158
47(C)
C157
47(C)
R150
5.6K
C152
102(C)
R161
1K
R156
1K
R167
100
R164
100
T154
5401
T153
5401
T151
5551 T152
5551
T156
5551
T155
5401
C161
47(C)
C159
47(C)
R166
1K8
R165
4K7
T157
2N5551
T159
2SA1013
T158
2SC2383
R168
220
R170
0.12/3W
T161
OPEN
T162
KTD718
R171
0.12/3W
R169
OPEN
T166
2N5551
R152
1K
R155
1K
C162
151(C)
C151
4.7uF/50V
R172
OPEN
R162
15K
I/P
*
POWER-AMP[FL]
O/P
T100
OPEN
T200
OPEN
R100
OPEN
R200
OPEN
MUTE
T163
TKB688
T165
OPEN
R173
OPEN
R175
30K
T160
OPEN T164
OPEN
C150
4.7uF/50V
R153
7K5
R154
7K5
C154
10uF/25V
C153
10uF/25V
-15V
+15V
T167
9014 T267 9014
R178
4.7/0.5W
R176
56K
R177
680/2W
C163
104(M)
D251
1N4148
R274
1K5
R260
100
R259
100
R258
100
R257
100
R251
22K
C255
15(C)
C256
100uF/25V
R263
560
C258
47(C)
C257
47(C)
R250
5.6K
C252
102(C)
R261
1K
R256
1K
R267
100
R264
100
T254
5401
T253
5401
T251
5551 T252
5551
T256
5551
T255
5401
C261
47(C)
C259
47(C)
R266
1K8
R265
4K7
T257
2N5551
T259
2SA1013
T258
2SC2383
R268
220 R270
0.12/3W
T261
OPEN
T262
KTD718
R271
0.12/3W
R269
OPEN
T266
2N5551
R252
1K
R255
1K
C262
151(C)
C250
4.7uF/50V
R272
OPEN
R262
15K
*
POWER-AMP[FR]
O/P
T263
TKB688
T265
OPEN
R273
OPEN
R275
30K
T260
OPEN T264
OPEN
R253
7K5
R254
7K5
C254
10uF/25V
C253
10uF/25V
-15V
+15V
R278
4.7/0.5W
R277
680/2W
C263
104(M)
PROTECTION
C251
4.7uF/50V
POWER-AMP(RL]
POWER-AMP(RR]
[SAME AS FL-CH]
[SAME AS FR-CH]
O/P
O/P
PROTECTION
PROTECTION
R276
56K
C160
473(M)
C260 473(M)
C164
100uF/16V
SW101B
SW101A
SW301A
SW301B
IC103B
2/24558
-15V
+15V
C149
104(C)
C249
104(C)
IC103A
1/24558
PROTECTION
SPK01
FRONT OUT
SPK02
REAR OUT
FL-
FL+
FR-
FL+
RL-
RL+
RR-
RR+
C97
OPEN
C99
OPEN
GND
GND
2(G) 3 (S)
1(D)
2(G) 3(S)
1(D)
*
*
*
*
VCC
VCC
VEE
VEE
L101
SHORT
R116
SHORT C112 OPEN
A
A
A
A
A
A
A
A
A
A
A A
A
B
B
B
C111
OPEN
ACA-2624-AMP-PA4-4.SCH
Z101
OPEN
Z102
OPEN
Z201
OPEN
Z202
OPEN
Z301
OPEN
Z302
OPEN
Z401
OPEN
Z402
OPEN
2
31
5
67
1
2
3
5
67
5
67
3
21
5
67
1
2
3
5
67
1
2
3
5
67
1
2
3
1
2
3
5
67
1
2
3
5
67

12345678
A
B
C
D
8
7654321
D
C
B
A
C17
104(C)
C05
102(M)
D01
1N4148
C07
100U/25V
C04
100U/16V
C06
100U/16V
LED01
SAM3270
T01
9015C T02
9015C
R13
27K
R04
68K
R02
4K7
t
TH01
50KTH
T05
9014C
15A
F01
T11
FQP50N06
T12
OPEN
TR01
362315-40554
2IN+ 16
2IN- 15
Ref 14
OUT 13 VCC 12
C2 11 E2 10 E1 9
C1
8
GND
7
RT
6
CT
5
DTC
4
Fback
3
1IN-
2
1IN+
1
IC01
KIA494AP
R12
1K
R14
15K
C02
47U/16V
C01
100U/16V
R06
10K
R01
4K7
T07 2SA1013
T09 9015C
T10
9015C
R05
10
R03
10K
C12
10U/25V
C03
100U/16V
R25
10K
R26
220
C16
2200U/25V"RX"
R27
220
R30
47
C15
2200U/25V"RX"
R33
47
D03
1N4148
D02
1N4148
T14
FQP50N06
T13
FQP50N06
C11
104(C)
R28
1K
R29
1K
R32
OPEN
R24
1K2
R31
47
C14
104(C)
R15
130KF
R17
10 1/2W
R23 51K
R22
1K2
C13
473(C)
T06
9014C
T08
9014C
R21
4K7
R19
4K7
R44
10K R16
51KF
R18
4K7
R20
10K D04
1N4004
L02
CL-310 8T 1.8uH
C35
OPEN
C52
104(C)
C51
104(C)
C50
104(C)
D17
1N5404
+12V
REM
GND
P01
JSZ3-06C
15A
T15
OPEN
T16
FQP50N06
R46
47
R45
OPEN
R35
OPEN
R34
OPEN
C18
OPEN
C19
OPEN
L03
SHORT
ACA-2624-POWER-PA4-4.SCH
T17
OPEN
R39
10K/0.5W
R42
OPEN
C33
OPEN
C34
OPEN
R40
10K/0.5W
R41
OPEN
C30
3300U/50V
R43
OPEN
C29
3300U/50V
C28
OPEN
C32
104(C)
C27
OPEN
C31
104(C)
C22
220U/25V
C23
220U/25V
C25
104(C)
L01
SHORT
D15
OPEN
D16
OPEN
MUTE
VCC
VEE
D06 FR154
D05 FR154
D07 FR154
D08 FR154 R36
*150 2W
R37
*150 2W
C24
104(C)
+15V
-15V
G
S
D
3
1
2
C20
4U7/50V
G
2
O3 I
1
IC02
OPEN
G1
O3 I
2
IC03
OPEN
C21
4U7/50V
C36
OPEN
C37
OPEN
C26
OPEN
R38
OPEN
Z1
1N4744
Z2
1N4744
JUMPER
JUMPER
D13
C25-02C
D12
C25-02N
C08
104(C)
R07
1K
R11
15K
C09
10U/25V C10
47U/50V
R10
15K
R08
22K T04
5401
PROTECTION
R09
33K
T03
9014C
T22
9015C
T23
9014C
JP3
OPEN
R48
56K

PA4-4.PCB X060210

Block No. 01
! Item Parts number Parts name Remarks ! Item Parts number Parts name Remarks
C01 ELE 100U/16V CAPACITOR C249 CER 0.1U/50V CAPACITOR
C02 ELE 47U/16V CAPACITOR C25 CER 0.1U/50V CAPACITOR
C03 ELE 100U/16V CAPACITOR C250 ELE 4.7U/50V CAPACITOR
C04 ELE 100U/16V CAPACITOR C251 ELE 4.7U/50V CAPACITOR
C05 MAL 0.001U/100V CAPACITOR C252 CER 1000P/100V CAPACITOR
C06 ELE 100U/16V CAPACITOR C253 ELE 10U/25V CAPACITOR
C07 ELE 100U/25V CAPACITOR C254 ELE 10U/25V CAPACITOR
C08 CER 0.1U/50V CAPACITOR C255 CER 15P/500V CAPACITOR
C09 ELE 10U/25V CAPACITOR C256 ELE 100U/25V CAPACITOR
C10 ELE 47U/50V CAPACITOR C257 CER 47P/500V CAPACITOR
C101 ELE 4.7U/50V CAPACITOR C258 CER 47P/500V CAPACITOR
C102 CER 1000P/100V CAPACITOR C259 CER 47P/500V CAPACITOR
C103 MAL 0.056U/100V CAPACITOR C260 MAL 0.047U/100V CAPACITOR
C104 MAL 0.056U/100V CAPACITOR C261 CER 47P/500V CAPACITOR
C105 MAL 0.056U/100V CAPACITOR C262 CER 150P/100V CAPACITOR
C106 MAL 0.1U/100V CAPACITOR C263 MAL 0.1U/100V CAPACITOR
C107 MAL 0.056U/100V CAPACITOR C29 ELE 3300U/50V CAPACITOR h<26mm
C108 MAL 0.056U/100V CAPACITOR C30 ELE 3300U/50V CAPACITOR h<26mm
C109 MAL 0.1U/100V CAPACITOR C301 ELE 4.7U/50V CAPACITOR
C11 CER 0.1U/50V CAPACITOR C302 CER 1000P/100V CAPACITOR
C12 ELE 10U/25V CAPACITOR C303 MAL 0.056U/100V CAPACITOR
C13 CER 0.047U/50V CAPACITOR C304 MAL 0.056U/100V CAPACITOR
C14 CER 0.1U/50V CAPACITOR C305 MAL 0.056U/100V CAPACITOR
C149 CER 0.1U/50V CAPACITOR C306 MAL 0.1U/100V CAPACITOR
C15 ELE 2200U/25V "RX" CAPACITOR h<26mm C307 MAL 0.056U/100V CAPACITOR
C150 ELE 4.7U/50V CAPACITOR C308 MAL 0.056U/100V CAPACITOR
C151 ELE 4.7U/50V CAPACITOR C309 MAL 0.1U/100V CAPACITOR
C152 CER 1000P/100V CAPACITOR C31 CER 0.1U/50V CAPACITOR
C153 ELE 10U/25V CAPACITOR C32 CER 0.1U/50V CAPACITOR
C154 ELE 10U/25V CAPACITOR C350 ELE 4.7U/50V CAPACITOR
C155 CER 15P/500V CAPACITOR C351 ELE 4.7U/50V CAPACITOR
C156 ELE 100U/25V CAPACITOR C352 CER 1000P/100V CAPACITOR
C157 CER 47P/500V CAPACITOR C353 ELE 10U/25V CAPACITOR
C158 CER 47P/500V CAPACITOR C354 ELE 10U/25V CAPACITOR
C159 CER 47P/500V CAPACITOR C355 CER 15P/500V CAPACITOR
C16 ELE 2200U/25V "RX" CAPACITOR h<26mm C356 ELE 100U/25V CAPACITOR
C160 MAL 0.047U/100V CAPACITOR C357 CER 47P/500V CAPACITOR
C161 CER 47P/500V CAPACITOR C358 CER 47P/500V CAPACITOR
C162 CER 150P/100V CAPACITOR C359 CER 47P/500V CAPACITOR
C163 MAL 0.1U/100V CAPACITOR C360 MAL 0.047U/100V CAPACITOR
C164 ELE 100U/16V CAPACITOR C361 CER 47P/500V CAPACITOR
C17 CER 0.1U/50V CAPACITOR C362 CER 150P/100V CAPACITOR
C20 ELE 4.7U/50V CAPACITOR C363 MAL 0.1U/100V CAPACITOR
C201 ELE 4.7U/50V CAPACITOR C364 ELE 100U/16V CAPACITOR
C202 CER 1000P/100V CAPACITOR C401 ELE 4.7U/50V CAPACITOR
C203 MAL 0.056U/100V CAPACITOR C402 CER 1000P/100V CAPACITOR
C204 MAL 0.056U/100V CAPACITOR C403 MAL 0.056U/100V CAPACITOR
C205 MAL 0.056U/100V CAPACITOR C404 MAL 0.056U/100V CAPACITOR
C206 MAL 0.1U/100V CAPACITOR C405 MAL 0.056U/100V CAPACITOR
C207 MAL 0.056U/100V CAPACITOR C406 MAL 0.1U/100V CAPACITOR
C208 MAL 0.056U/100V CAPACITOR C407 MAL 0.056U/100V CAPACITOR
C209 MAL 0.1U/100V CAPACITOR C408 MAL 0.056U/100V CAPACITOR
C21 ELE 4.7U/50V CAPACITOR C409 MAL 0.1U/100V CAPACITOR
C22 ELE 220U/25V CAPACITOR C450 ELE 4.7U/50V CAPACITOR
C23 ELE 220U/25V CAPACITOR C451 ELE 4.7U/50V CAPACITOR
C24 CER 0.1U/50V CAPACITOR C452 CER 1000P/100V CAPACITOR
ACA-2624
Electrical parts list（MAIN PCB）
Electrical parts list / ACA-2624

Block No. 02
! Item Parts number Parts name Remarks ! Item Parts number Parts name Remarks
C453 ELE 10U/25V CAPACITOR R105 CAR 56KΩ1/4W RESISTOR
C454 ELE 10U/25V CAPACITOR R106 CAR 10KΩ1/4W RESISTOR
C455 CER 15P/500V CAPACITOR R107 CAR 1KΩ1/4W RESISTOR
C456 ELE 100U/25V CAPACITOR R108 CAR 56KΩ1/4W RESISTOR
C457 CER 47P/500V CAPACITOR R109 CAR 68KΩ1/4W RESISTOR
C458 CER 47P/500V CAPACITOR R11 CAR 15KΩ1/4W RESISTOR
C459 CER 47P/500V CAPACITOR R110 CAR 56KΩ1/4W RESISTOR
C460 MAL 0.047U/100V CAPACITOR R111 CAR 1KΩ1/4W RESISTOR
C461 CER 47P/500V CAPACITOR R112 CAR 10KΩ1/4W RESISTOR
C462 CER 150P/100V CAPACITOR R113 CAR 10KΩ1/4W RESISTOR
C463 MAL 0.1U/100V CAPACITOR R114 CAR 22KΩ1/4W RESISTOR
C50 CER 0.1U/50V CAPACITOR R115 CAR 1KΩ1/4W RESISTOR
C51 CER 0.1U/50V CAPACITOR R12 CAR 1KΩ1/4W RESISTOR
C52 CER 0.1U/50V CAPACITOR R13 CAR 27KΩ1/4W RESISTOR
D01 1N4148 GE DIODE R14 CAR 15KΩ1/4W RESISTOR
D02 1N4148 GE DIODE R15 CAR 130KF1/4W±1% RESISTOR
D03 1N4148 GE DIODE R150 CAR 5.6KΩ1/4W RESISTOR
D04 1N4004 DIODE R151 CAR 22KΩ1/4W RESISTOR
D05 FR154 DIODE R152 CAR 1KΩ1/4W RESISTOR
D06 FR154 DIODE R153 CAR 7.5KΩ1/4W RESISTOR
D07 FR154 DIODE R154 CAR 7.5KΩ1/4W RESISTOR
D08 FR154 DIODE R155 CAR 1KΩ1/4W RESISTOR
D12 02N DIODE FAST RECOVERY R156 CAR 1KΩ1/4W RESISTOR
D13 02C DIODE FAST RECOVERY R157 CAR 100Ω1/4W RESISTOR
D151 1N4148 GE DIODE R158 CAR 100Ω1/4W RESISTOR
D17 1N5404 DIODE 400V/3A R159 CAR 100Ω1/4W RESISTOR
D251 1N4148 GE DIODE R16 CAR 51KΩ1/4W±1% RESISTOR
D351 1N4148 GE DIODE R160 CAR 100Ω1/4W RESISTOR
D451 1N4148 GE DIODE R161 CAR 1KΩ1/4W RESISTOR
F01 BXS-03A FUSE HOLDER GOLD PLATED R162 CAR 15KΩ1/4W RESISTOR
FUSE01 ZH270-15A AUTO FUSE R163 CAR 560Ω1/4W RESISTOR
IC01 KIA494AP I.C R164 CAR 100Ω1/4W RESISTOR
IC101 JRC4558 I.C R165 CAR 4.7KΩ1/4W RESISTOR
IC102 JRC4558 I.C R166 CAR 1.8KΩ1/4W RESISTOR
IC103 JRC4558 I.C R167 CAR 100Ω1/4W RESISTOR
IC203 JRC4558 I.C R168 CAR 220Ω1/4W RESISTOR
IC301 JRC4558 I.C R17 CAR 10Ω1/2W RESISTOR
IC302 JRC4558 I.C R170 CAR 0.12Ω3W RESISTOR
IC303 JRC4558 I.C R171 CAR 0.12Ω3W RESISTOR
IC403 JRC4558 I.C R174 CAR 1.5KΩ1/4W RESISTOR
L02 CL-310,1.8uH INDUCTOR 8T R175 CAR 30KΩ1/4W RESISTOR
LED01 SAM3270∮3LED R176 CAR 56KΩ1/4W RESISTOR
P01 JSZ3-06C POWER INPUT JACK GOLD PLATED R177 CAR 680Ω2W RESISTOR
R01 CAR 4.7KΩ1/4W RESISTOR R178 CAR 4.7Ω1/2W RESISTOR
R02 CAR 4.7KΩ1/4W RESISTOR R18 CAR 4.7KΩ1/4W RESISTOR
R03 CAR 10KΩ1/4W RESISTOR R19 CAR 4.7KΩ1/4W RESISTOR
R04 CAR 68KΩ1/4W RESISTOR R20 CAR 10KΩ1/4W RESISTOR
R05 CAR 10Ω1/4W RESISTOR R201 CAR 1KΩ1/4W RESISTOR
R06 CAR 10KΩ1/4W RESISTOR R203 CAR 1KΩ1/4W RESISTOR
R07 CAR 1KΩ1/4W RESISTOR R204 CAR 10KΩ1/4W RESISTOR
R08 CAR 22KΩ1/4W RESISTOR R205 CAR 47KΩ1/4W RESISTOR
R09 CAR 33KΩ1/4W RESISTOR R206 CAR 10.2KΩ1/4W±1% RESISTOR
R10 CAR 15KΩ1/4W RESISTOR R207 CAR 1KΩ1/4W RESISTOR
R101 CAR 1KΩ1/4W RESISTOR R208 CAR 56KΩ1/4W RESISTOR
R103 CAR 1KΩ1/4W RESISTOR R209 CAR 68KΩ1/4W RESISTOR
R104 CAR 10KΩ1/4W RESISTOR R21 CAR 4.7KΩ1/4W RESISTOR
ACA-2624
Electrical parts list（MAIN PCB）
Electrical parts list / ACA-2624

Block No. 03
! Item Parts number Parts name Remarks ! Item Parts number Parts name Remarks
R210 CAR 56KΩ1/4W RESISTOR R33 CAR 47Ω1/4W RESISTOR
R211 CAR 1KΩ1/4W RESISTOR R350 CAR 5.6KΩ1/4W RESISTOR
R212 CAR 10KΩ1/4W RESISTOR R351 CAR 22KΩ1/4W RESISTOR
R213 CAR 10KΩ1/4W RESISTOR R352 CAR 1KΩ1/4W RESISTOR
R214 CAR 22KΩ1/4W RESISTOR R353 CAR 7.5KΩ1/4W RESISTOR
R215 CAR 1KΩ1/4W RESISTOR R354 CAR 7.5KΩ1/4W RESISTOR
R22 CAR 1.2KΩ1/4W RESISTOR R355 CAR 1KΩ1/4W RESISTOR
R23 CAR 51KΩ1/4W RESISTOR R356 CAR 1KΩ1/4W RESISTOR
R24 CAR 1.2KΩ1/4W RESISTOR R357 CAR 100Ω1/4W RESISTOR
R25 CAR 10KΩ1/4W RESISTOR R358 CAR 100Ω1/4W RESISTOR
R250 CAR 5.6KΩ1/4W RESISTOR R359 CAR 100Ω1/4W RESISTOR
R251 CAR 22KΩ1/4W RESISTOR R36 CAR 150Ω2W RESISTOR
R252 CAR 1KΩ1/4W RESISTOR R360 CAR 100Ω1/4W RESISTOR
R253 CAR 7.5KΩ1/4W RESISTOR R361 CAR 1KΩ1/4W RESISTOR
R254 CAR 7.5KΩ1/4W RESISTOR R362. CAR 15KΩ1/4W RESISTOR
R255 CAR 1KΩ1/4W RESISTOR R363 CAR 560Ω1/4W RESISTOR
R256 CAR 1KΩ1/4W RESISTOR R364 CAR 100Ω1/4W RESISTOR
R257 CAR 100Ω1/4W RESISTOR R365 CAR 4.7KΩ1/4W RESISTOR
R258 CAR 100Ω1/4W RESISTOR R366 CAR 1.8KΩ1/4W RESISTOR
R259 CAR 100Ω1/4W RESISTOR R367 CAR 100Ω1/4W RESISTOR
R26 CAR 220Ω1/4W RESISTOR R368 CAR 220Ω1/4W RESISTOR
R260 CAR 100Ω1/4W RESISTOR R37 CAR 150Ω2W RESISTOR
R261 CAR 1KΩ1/4W RESISTOR R370 CAR 0.12Ω3W RESISTOR
R262 CAR 15KΩ1/4W RESISTOR R371 CAR 0.12Ω3W RESISTOR
R263 CAR 560Ω1/4W RESISTOR R374 CAR 1.5KΩ1/4W RESISTOR
R264 CAR 100Ω1/4W RESISTOR R375 CAR 30KΩ1/4W RESISTOR
R265 CAR 4.7KΩ1/4W RESISTOR R376 CAR 56KΩ1/4W RESISTOR
R266 CAR 1.8KΩ1/4W RESISTOR R377 CAR 680Ω2W RESISTOR
R267 CAR 100Ω1/4W RESISTOR R378 CAR 4.7Ω1/2W RESISTOR
R268 CAR 220Ω1/4W RESISTOR R39 CAR 10KΩ1/2W RESISTOR
R27 CAR 220Ω1/4W RESISTOR R40 CAR 10KΩ1/2W RESISTOR
R270 CAR 0.12Ω3W RESISTOR R401 CAR 1KΩ1/4W RESISTOR
R271 CAR 0.12Ω3W RESISTOR R403 CAR 1KΩ1/4W RESISTOR
R274 CAR 1.5KΩ1/4W RESISTOR R404 CAR 10KΩ1/4W RESISTOR
R275 CAR 30KΩ1/4W RESISTOR R405 CAR 47KΩ1/4W RESISTOR
R276 CAR 56KΩ1/4W RESISTOR R406 CAR 10.2KΩ1/4W±1% RESISTOR
R277 CAR 680Ω2W RESISTOR R407 CAR 1KΩ1/4W RESISTOR
R278 CAR 4.7Ω1/2W RESISTOR R408 CAR 56KΩ1/4W RESISTOR
R28 CAR 1KΩ1/4W RESISTOR R409 CAR 68KΩ1/4W RESISTOR
R29 CAR 1KΩ1/4W RESISTOR R410 CAR 56KΩ1/4W RESISTOR
R30 CAR 47Ω1/4W RESISTOR R411 CAR 1KΩ1/4W RESISTOR
R301 CAR 1KΩ1/4W RESISTOR R412 CAR 10KΩ1/4W RESISTOR
R303 CAR 1KΩ1/4W RESISTOR R413 CAR 10KΩ1/4W RESISTOR
R304 CAR 10KΩ1/4W RESISTOR R414 CAR 22KΩ1/4W RESISTOR
R305 CAR 56KΩ1/4W RESISTOR R415 CAR 1KΩ1/4W RESISTOR
R306 CAR 10KΩ1/4W RESISTOR R44 CAR 10KΩ1/4W RESISTOR
R307 CAR 1KΩ1/4W RESISTOR R450 CAR 5.6KΩ1/4W RESISTOR
R308 CAR 56KΩ1/4W RESISTOR R451 CAR 22KΩ1/4W RESISTOR
R309 CAR 68KΩ1/4W RESISTOR R452 CAR 1KΩ1/4W RESISTOR
R31 CAR 47Ω1/4W RESISTOR R453 CAR 7.5KΩ1/4W RESISTOR
R310 CAR 56KΩ1/4W RESISTOR R454 CAR 7.5KΩ1/4W RESISTOR
R311 CAR 1KΩ1/4W RESISTOR R455 CAR 1KΩ1/4W RESISTOR
R312 CAR 10KΩ1/4W RESISTOR R456 CAR 1KΩ1/4W RESISTOR
R313 CAR 10KΩ1/4W RESISTOR R457 CAR 100Ω1/4W RESISTOR
R314 CAR 22KΩ1/4W RESISTOR R458 CAR 100Ω1/4W RESISTOR
R315 CAR 1KΩ1/4W RESISTOR R459 CAR 100Ω1/4W RESISTOR
ACA-2624
Electrical parts list（MAIN PCB）
Electrical parts list / ACA-2624

Block No. 04
! Item Parts number Parts name Remarks ! Item Parts number Parts name Remarks
R46 CAR 47Ω1/4W RESISTOR T255 2N5401 TRANSISTOR TO-92(E.B.C)
R460 CAR 100Ω1/4W RESISTOR T256 2N5551 TRANSISTOR TO-92(E.B.C)
R461 CAR 1KΩ1/4W RESISTOR T257 2N5551 TRANSISTOR TO-92(E.B.C)
R462 CAR 15KΩ1/4W RESISTOR T258 2SC2383 TRANSISTOR TO-92L(E.C.B)
R463 CAR 560Ω1/4W RESISTOR T259 2SA1013 TRANSISTOR TO-92L(E.C.B)
R464 CAR 100Ω1/4W RESISTOR T262 KTD718 TRANSISTOR TO-3P(B.C.E)
R465 CAR 4.7KΩ1/4W RESISTOR T263 KTB688 TRANSISTOR TO-3P(B.C.E)
R466 CAR 1.8KΩ1/4W RESISTOR T266 2N5551 TRANSISTOR TO-92(E.B.C)
R467 CAR 100Ω1/4W RESISTOR T267 9014C TRANSISTOR TO-92(E.B.C)
R468 CAR 220Ω1/4W RESISTOR T351 2N5551 TRANSISTOR TO-92(E.B.C)
R470 CAR 0.12Ω3W RESISTOR T352 2N5551 TRANSISTOR TO-92(E.B.C)
R471 CAR 0.12Ω3W RESISTOR T353 2N5401 TRANSISTOR TO-92(E.B.C)
R474 CAR 1.5KΩ1/4W RESISTOR T354 2N5401 TRANSISTOR TO-92(E.B.C)
R475 CAR 30KΩ1/4W RESISTOR T355 2N5401 TRANSISTOR TO-92(E.B.C)
R476 CAR 56KΩ1/4W RESISTOR T356 2N5551 TRANSISTOR TO-92(E.B.C)
R477 CAR 680Ω2W RESISTOR T357 2N5551 TRANSISTOR TO-92(E.B.C)
R478 CAR 4.7Ω1/2W RESISTOR T358 2SC2383 TRANSISTOR TO-92L(E.C.B)
R48 CAR 56KΩ1/4W RESISTOR T359 2SA1013 TRANSISTOR TO-92L(E.C.B)
RCA AV4-8.4-13 RCA JACK GOLD PLATED T362 KTD718 TRANSISTOR TO-3P(B.C.E)
SPK01 JSZ4-02 SPEAKER OUT JACK GOLD PLATED T363 KTB688 TRANSISTOR TO-3P(B.C.E)
SPK02 JSZ4-02 SPEAKER OUT JACK GOLD PLATED T366 2N5551 TRANSISTOR TO-92(E.B.C)
SW101 KD2304-02G9 CROSSOVER SWITCH T367 9014C TRANSISTOR TO-92(E.B.C)
SW301 KD2304-02G9 CROSSOVER SWITCH T451 2N5551 TRANSISTOR TO-92(E.B.C)
T01 9015C TRANSISTOR TO-92(E.B.C) T452 2N5551 TRANSISTOR TO-92(E.B.C)
T02 9015C TRANSISTOR TO-92(E.B.C) T453 2N5401 TRANSISTOR TO-92(E.B.C)
T03 9014C TRANSISTOR TO-92(E.B.C) T454 2N5401 TRANSISTOR TO-92(E.B.C)
T04 2N5401 TRANSISTOR TO-92(E.B.C) T455 2N5401 TRANSISTOR TO-92(E.B.C)
T05 9014C TRANSISTOR TO-92(E.B.C) T456 2N5551 TRANSISTOR TO-92(E.B.C)
T06 9014C TRANSISTOR TO-92(E.B.C) T457 2N5551 TRANSISTOR TO-92(E.B.C)
T07 2SA1013 TRANSISTOR TO-92L(E.C.B) T458 2SC2383 TRANSISTOR TO-92L(E.C.B)
T08 9014C TRANSISTOR TO-92(E.B.C) T459 2SA1013 TRANSISTOR TO-92L(E.C.B)
T09 9015C TRANSISTOR TO-92(E.B.C) T462 KTD718 TRANSISTOR TO-3P(B.C.E)
T10 9015C TRANSISTOR TO-92(E.B.C) T463 KTB688 TRANSISTOR TO-3P(B.C.E)
T11 FQP50N06 MOSFET TO-220 T466 2N5551 TRANSISTOR TO-92(E.B.C)
T13 FQP50N06 MOSFET TO-220 T467 9014C TRANSISTOR TO-92(E.B.C)
T14 FQP50N06 MOSFET TO-220 TH01 50KTH NTC RESISTOR
T151 2N5551 TRANSISTOR TO-92(E.B.C) TR01 37PHI TRANSFORMER 362315-40554
T152 2N5551 TRANSISTOR TO-92(E.B.C) VR101 F-16KG B20K L10REA(M) RHEOSTAT 90°
T153 2N5401 TRANSISTOR TO-92(E.B.C) VR102 F-16KG B500K L10REA(M) RHEOSTAT 90°
T154 2N5401 TRANSISTOR TO-92(E.B.C) VR103 F-16KJ3 C100K L10REA(M) RHEOSTAT 90°
T155 2N5401 TRANSISTOR TO-92(E.B.C) VR301 F-16KG B20K L10REA(M) RHEOSTAT 90°
T156 2N5551 TRANSISTOR TO-92(E.B.C) VR302 F-16KG B500K L10REA(M) RHEOSTAT 90°
T157 2N5551 TRANSISTOR TO-92(E.B.C) VR303 F-16KJ3 C100K L10REA(M) RHEOSTAT 90°
T158 2SC2383 TRANSISTOR TO-92L(E.C.B) Z1 1N4744 DIODE 15V/1W
T159 2SA1013 TRANSISTOR TO-92L(E.C.B) Z2 1N4744 DIODE 15V/1W
T16 FQP50N06 MOSFET TO-220
T162 KTD718 TRANSISTOR TO-3P(B.C.E)
T163 KTB688 TRANSISTOR TO-3P(B.C.E)
T166 2N5551 TRANSISTOR TO-92(E.B.C)
T167 9014C TRANSISTOR TO-92(E.B.C)
T22 9015C TRANSISTOR TO-92(E.B.C)
T23 9014C TRANSISTOR TO-92(E.B.C)
T251 2N5551 TRANSISTOR TO-92(E.B.C)
T252 2N5551 TRANSISTOR TO-92(E.B.C)
T253 2N5401 TRANSISTOR TO-92(E.B.C)
T254 2N5401 TRANSISTOR TO-92(E.B.C)
ACA-2624
Electrical parts list（MAIN PCB）
Electrical parts list / ACA-2624

NO Item Unit
Front
Rear
Front
Rear
Front
Rear
Front L/R
Rear L/R
Product specification
CH1&CH2: ≥65.73 W/4Ω; W/2Ω
CH3&CH4: ≥70.50 W/4Ω; W/2Ω
Rated
Distortion: 10%
CH1&CH2: ≥140.63 W/4Ω; W/2Ω
CH3&CH4: ≥137.15 W/4Ω; W/2Ω
Max. output power
CH1&CH2: ≥203.45 W/4Ω; W/2Ω
CH3&CH4: ≥196.28 W/4Ω; W/2Ω
4 BTL Output power
Rated
Distortion: 0.7%
W
Car audio amplifier capability request
Client Name: AKAI Serial Number :
Condition Capability request Sample1：
Model Name: ACA-2624 Accomplished Q'ty:
PO. Number: Accomplished Date:
1Gain-frequency
response Work normally
Front L/R CH2: +1/-3
Rear L/R +1/- 3 (10Hz~20kHz) CH3: +1/-3 CH4: +1/-3
dB
+1/- 3 (10Hz~20kHz) CH1: +1/-3
2Total harmonic
distortion and noise
Work normally
10W,4Ω
Front L/R
Rear L/R
%≤0.7%
CH1: ＜0.07 CH2: ＜0.04
CH3: ＜0.04 CH4: ＜0.05
3
Normal Output
power(4Ω)
Rated
Distortion: 0.7%
Front L/R
Rear L/R
Rated
Distortion:10%
Front L/R
Rear L/R
Max. output power
Front L/R
CH4: ≥44.26
CH1: ≥66.80 CH2: ≥65.47
CH3: ≥65.52 CH4: ≥65.46
CH1: ≥89.45 CH2: ≥88.03
Rear L/R CH3: ≥89.00 CH4: ≥89.54
W Product specification
CH1: ≥47.38 CH2: ≥47.71
CH3: ≥44.52
CH3: ≥66.01 CH4: ≥68.47
Normal Output
power(2Ω)
Rated
Distortion: 0.7%
Front L/R
W
Rated
Distortion: 10%
Front L/R
Max. output power
Front L/R
CH2: ≥32.98
Rear L/R CH3: ≥34.98 CH4: ≥35.78
CH1: ≥106.95 CH2: ≥95.48
Rear L/R CH3: ≥97.72 CH4: ≥101.65
Product specification
CH1: ≥69.84 CH2: ≥65.87
Rear L/R
CH1: ≥31.20
5
Signal noise ratio
(Input Terminal
Short)
Rated
1kHz
Distortion: 10%
Front L/R
Signal noise ratio
(Input Terminal
Open)
Rated
1kHz
Distortion: 10%
Front L/R
output noise
No signal inpu
t
(Input Terminal
O
p
en
)
CH2: ≥95.0/97.4
Rear L/R CH3: ≥92.1/94.4 CH4: ≥94.9/96.8
dB ≥71
Full range
≥76
A-Weighting
CH1: ≥92.2/95.3
CH2: ≥93.4/96.9
Rear L/R CH3: ≥95.0/98.1 CH4: ≥94.1/96.3
dB ≥71
Full range
≥76
A-Weighting
CH1: ≥94.3/98.6
mV ≤3
2.0/2.0
2.0/2.0
6 Separation Work normally
Distortion:0.7%
1 kHz
10 kHz
dB
≥40 CH1 & CH2:≥46/46 CH3 & CH4:≥46/48
≥30 CH1 & CH2:≥39/41 CH3 & CH4:≥44/42
7 Be sensitive to input Volume max
Distortion:10%
High input
mV Product specification
---
Low input 170
Capability Request / ACA-2624 1/2

NO Item Unit
Car audio amplifier capability request
Client Name: AKAI Serial Number :
Condition Capability request Sample1：
Model Name: ACA-2624 Accomplished Q'ty:
PO. Number: Accomplished Date:
Work normally Frequency kHz
No signal input Amplifier: ±25.95 Preamp: +/- 16
THD10% 2ΩAmplifier: ±23.12 Preamp: +/- 15
THD10% 4ΩAmplifier: ±23.75 Preamp: +/- 16
1/2f 23 Hz CH1 & CH2: ≥+ 8 CH3 & CH4: ≥+8
f 45 Hz CH1 & CH2: ≥+ 12 CH3 & CH4:≥+12
2f 90 Hz CH1 & CH2: ≥+ 8 CH3 & CH4: ≥+8
1/2f 15 Hz CH1 & CH2: - 0.5 CH3 & CH4: -0.5
f30 Hz CH1 & CH2: - 3 CH3 & CH4: -3
2f 60 Hz CH1 & CH2: - 8 CH3 & CH4: -8
1/2f 100 Hz CH1 & CH2: - 0.5 CH3 & CH4: -0.5
f200 Hz CH1 & CH2: - 3 CH3 & CH4: -3
2f 400 Hz CH1 & CH2: - 12 CH3 & CH4: -12
1/2f 17 Hz CH1 & CH2: - 16 CH3 & CH4: -16
f35 Hz CH1 & CH2: - 3 CH3 & CH4: -3
2f 70 Hz CH1 & CH2: + 1 CH3 & CH4: +1
1/2f 2.25 KHz CH1 & CH2: - 7 CH3 & CH4: -7
f4.5 KHz CH1 & CH2: - 3 CH3 & CH4: -3
2f 9 KHz CH1 & CH2: - 1 CH3 & CH4: -1
Operated by: Xiaoyulin Approved by: Zhaozhigang
8On-off power part
testing Product specification
37.02
Power
supply
voltage
V
Output in-phase
CH1&CH2 contra-phase / CH3&CH4 contra-phase
10 Gain difference
between channels
Volume output ( max~max
decrese 46dB ) dB ≤3 ≤1.5
9Phase between channels In-phaseWork normally ---
Not self-excitation and
parasitism OK
12 Bass boost range dB Product specification
11 Stability Rated ---
Low-Pass crossover
（Max.）dB Product specification
13
Low-Pass crossover
（Min.）dB Product specification
High-Pass crossover
（Max.）dB Product specification
14
High-Pass crossover
（Min.）dB Product specification
15 Power supply
(Rated)
Distortion:10% W Product specification
/
Static /
16 Function testing
Power on delay
Product specificationDC offset Protection
Amplifier on/off
3s
Remote Switch OK
Short circuit Protection OK
OK
no sound on/off OK
caraudio on/off OK
OK
Temperature testing 1/3 Max. Power 4hours testing OK
17 terminal short-circuit
testing
[Heat sink] with [power supply (+/-)
terminal]、[speaker (+/-) terminal]、
[VR crust] 、[RCA terminal]
No noise or spark
OK
[power supply (+) terminal] with
[speaker (+/-) terminal]、[VR crust]
、[RCA terminal]
OK
[power supply (-) terminal] wit
h
[speaker (+/-) terminal]、[VR crust]
、[RCA terminal]
OK
Note:
Power supply voltage: 14.0V
Date: 2006/03/01
Capability Request / ACA-2624 2/2