CS Series
CS300.1
1 CHANNEL POWER AMPLIFIER
SERVICE MANUAL
JBL Consumer Products
250 Crossways Park Dr.
Woodbury, New York 11797 Rev0 8/2005
CS Series 300.1
1
- CONTENTS -
SPECIFICATIONS ………………………………….……..1
PACKAGING……..…………………………………….......2
CONNECTIONS………………….……...……..…...…..…3
SET-UP/CONTROLS ……..………………..…….….…...4
BASIC TROUBLESHOOTING..…….…….………………4
EXPLODED VIEW/PARTS LIST…….….….…………....5
AMPLIFIER BLOCK DIAGRAM…………………….……6
P.C.B. DRAWINGS….……………………………….…….7
ELECTRICAL PARTS LIST ..……….……….…….….…9
IC/TRANSISTOR PINOUTS..……..….…….….….….….12
SCHEMATICS………..…………………………….……..13
CS300.1 Specifications
Output Power: 236W RMS x 1 channel @ 4 ohms, ≤1% THD + N
(14.4V supply) 338W RMS x 1 channel @ 2 ohms, ≤1% THD + N
Signal-to-noise ratio: 100dBA (reference 1W into 4 ohms)
Dynamic power: 464W @ 2 ohms
Effective damping factor: 6.395 @ 4 ohms
Frequency response: 10Hz – 320Hz (–3dB)
Maximum input signal: 7.5V
Maximum sensitivity: 260mV
Bass boost (45Hz) Variable 0 – 6dB
DC Offset <30mV
Output regulation: .073dB @ 4 ohms
Idle Current 0.71A
Input Impedance 20kΩ
Max Current Draw 23A @ 4 ohms
42A @ 2 ohms
Dimensions: 12 x 10 x 2 1/4” (L x W x H)
(305mm x 254mm x 57mm)
Fuses: 20A x 2
JBL continually strives to update and improve existing products, as well as create new ones. The specifications and
details in this and related JBL publications are therefore subject to change without notice.
CS Series 300.1
2
PACKAGE
NOTE: For simplicity, Figures 2 and 3
do not show power, remote and input
connections.
NOTE: Minimum speaker load is
2 ohms total.
Figure 2. CS subwoofer amplifier with two woofers
connected.
Figure 3. CS subwoofer amplifier with one woofer
connected.
Figure 4. CS50.4 amplifier in 4-channel (stereo)
operation to drive front and rear full-range speakers.
Figure 5. CS50.4 is set up for 3-channel operation to
drive a set of full-range speakers and a subwoofer.
Figure 6.
APPLICATIONS – CS50.4
The CS50.4 can be set up for stereo
4-channel, 3-channel or bridged
2-channel operation, as shown in
Figures 4 through 6.
NOTE: For simplicity, Figures 4 through
6 do not show power, remote and input
connections.
NOTE: Minimum speaker impedance
for stereo operation is 2 ohms.
Minimum speaker impedance for
bridged operation is 4 ohms.
CS Series 300.1
3
APPLICATIONS – CS300.1
The CS subwoofer amplifier is a
single-channel amplifier. There are
two sets of terminals to make it easy
to connect multiple woofers. Either
set of (+/–) terminals may be used
when connecting woofers.
To the right are two application
diagrams to help plan your subwoofer
system installation.
show how to configure the CS300.1
subwoofer amplifier.
Figures 2 and 3
Features, specifications and appearance are subject to change without notice.
CONTROLS AND SETUP
SYMPTOM LIKELY CAUSE SOLUTION
No audio No voltage at BATT+ Check voltages at
(POWER LEDs or REM terminals, amplifier terminals
are off) or bad or no ground with VOM
connection
No audio Amplifier is Make sure amplifier
(POWER overheated cooling is not blocked
LEDs are on) at mounting location;
verify speaker-system
impedance is within
specified limits
Voltage more than 16V Check vehicle
or less than 8.5V on charging system
BATT+ connection
SYMPTOM LIKELY CAUSE SOLUTION
No audio Voltage less than 9V on Check vehicle
(POWER BATT+ connection charging system
LEDs flash)
DC voltage on Amplifier may need
amplifier output service; see enclosed
warranty card for
service information
Distorted audio Input sensitivity is Check INPUT
not set properly, or LEVEL setting; or
amplifier or source check speaker wires
unit is defective for shorts or grounds
Distorted audio Short circuit in Remove speaker leads
and POWER speaker or wire one at a time to locate
LEDs flash shorted speaker or
wire, then repair
Music lacks Speakers are not Check speaker
“punch” connected properly connections for
proper polarity
SETTING THE
CROSSOVER(S)
Determine your system plans and set
the crossover mode switch accordingly.
If your system design does not include
a subwoofer with the CS50.4, set the
crossover mode to FLAT and skip to
“Setting Input Sensitivity.”
Initially set the crossover frequency
control midway. While listening to music,
adjust the crossover for the least
perceived distortion from the speakers,
allowing them to reproduce as much
bass as possible.
Systems using a separate subwoofer set
the crossover mode to HP (high pass) for
your full-range speakers. Adjust the
crossover frequency to limit bass and
provide increased system volume with
less distortion.
For subwoofers, choose the highest
frequency that removes vocal information
from the sound of the subwoofer.
If using the CS50.4 to drive a subwoofer(s),
set the crossover mode to LP (low pass).
SETTING INPUT
SENSITIVITY
1. Initially turn the INPUT LEVEL control(s)
to minimum (counter clockwise).
2. Reconnect the (–) negative lead to the
vehicle’s battery. Apply power to the
audio system and play a dynamic music
track.
3. On the source unit, increase the volume
control to 3/4 volume. Slowly increase
the INPUT LEVEL control(s) toward three
o’clock until you hear slight distortion
in the music. Then reduce the INPUT
LEVEL slightly until distortion is no
longer heard.
NOTE: After the source unit is on, blue
LEDs (on the top panel) will light, indicating
the amplifier is on. If not, check the wiring,
especially the remote connection from the
source unit. Also refer to “Troubleshooting”
guide below.
TROUBLESHOOTING
CS Series 300.1
4
CS Series 300.1
5
CS300.1 EXPLODED VIEW
CS Series 300.1
6
54321
D
6
D
CS300.1 BLOCK DIAGRAM
C
INPUT CH1
AUX OUT(CH1)
B
BALANCED
INPUT
(UNIT GAIN)
Ap Ap
VARIABLE LPF
32Hz--320Hz/12dB
10 50 320
BOOST
VARIABLE
0dB--6dB/45Hz
10 50 320
MAIN AMP
Ao
SPEAKER
AUX OUT(CH2)
C
B
BALANCED
INPUT
INPUT CH2
A
1 2 3 4 56
(UNIT GAIN)
A
CS Series 300.1
7
CS Series 300.1
8
CS Series 300.1
9
CS 300.1 Electrical Parts List
Part Number Description Qty Reference Designator
Main PCB
Semiconductors
123T0K30A Transistor K30A 1 Q1
124TN4401 Transistor TR MOTOROLA 2N4401 5 Q2 Q4 Q5 Q16 Q17
124TN4403 Transistor TR MOTOROLA 2N4403 3 Q6 Q9 Q10
124TN5401 Transistor TR MOTOROLA 2N5401 2 Q160 Q161
124TN5551 Transistor 2N5551 2 Q150 Q151
124T0SA06 Transistor TRMOTOROLAMPSA06 80
124T0SA42 Transistor TR MOTOROLA MPSA4
124T0SA56 Transistor TRMOTOROLAMPSA56 80
125T0C945 Transistor TR NEC 2SC945P 0.1A60V 1 Q159
126TSB647 Transistor 2SB647A 1 Q7
131TN4148 Diode DIODE NS1N4148HSS150M
133T0J5B6 Diode DIODENECRD5.6JSB ZNR5.6
133T0011B Diode DIODE NEC RD11EB3 11V 1 ZD2
133T0015B Diode DIODE NEC RD15EB3 15V 2 ZD3 ZD4
133T0018B Diode DIODE NEC ZNR0.5W18V 1 ZD5
154TTL431 IC DIP3 TL431 1 Q3
124T0SA06 Transistor TRMOTOROLAMPSA06 80
128TTI41C Transistor TIP41C 1 Q155
128TTI42C Transistor TIP42C 1 Q163
134TN5402 Diode DIODE 1N5402 ET3.0A100V 1 D9
154LM358N IC DIP8 CHINALM358N 1 IC2
154T04558 IC DIP8 ROHM BA4558 6 IC101 IC102 IC103 IC104 IC105 IC106
158TTL494 IC DIP16 NEC UPC494 OR TI TL494 1 IC1
123TRFZ4N Transistor IR IRFZ46N 6 Q11 Q12 Q13 Q15 Q18 Q19
128TTI41C Transistor TIP41C 1 Q14
128TTI42C Transistor TIP42C 1 Q8
128TTI35C Transistor TR SGS OR TITIP35C N 25 3 Q156 Q157 Q158
128TTI36C Transistor TR SGS OR TITIP36C P 25
135T1620C Diode DIODE MOTOROLA 1620C
135T1620R Diode DIODE MOTOROLA 1620CT
V 1 Q162
2 1 Q153
V 1 Q154
A 11 D1~D7 D11 D12 D13 D15
V 1 ZD1
V 1 Q152
A 3 Q164 Q165 Q166
T 1D8
R 1 D10
Resistors
22022047A Resistor RD 1/2W 4.7Ω 1 R191
220220470 Resistor RD 1/2W 47Ω 2 R32 R33
220440101 Resistor RD 1/4W 100Ω 8 R163~165 R26 R44 R46 R28 R29
220440102 Resistor RD 1/4W 1K 3 R153~155
220440221 Resistor RD 1/4W 220Ω 1 R190
220440272 Resistor RD 1/4W 2.7K 1 R186
22044047A Resistor RD 1/4W 4.7Ω 6 R174~R179
220880000 Resistor RD 1/8W 0Ω 7 JP3 JP48 JP60 JP84 JP91 D14 R21
220880101 Resistor RD 1/8W 100Ω 6 R25 R27 R159~R162
220880102 Resistor RD 1/8W 1K 13 R7 R11 R14-15 R40-41 R112-113 R123 R156 R158 R151 R152
220880103 Resistor RD 1/8W 10K 9 R10 R115~R118 R166 R169 R188 R20
220880104 Resistor RD 1/8W 100K 5 R2 R3 R12 R110 R111
220880123 Resistor RD 1/8W 12K 1 R17
220880153 Resistor RD 1/8W 15K 2 R49 R52
220880154 Resistor RD 1/8W 150K 2 R42 R43
220880183 Resistor RD 1/8W 18K 1 R35
220880202 Resistor RD 1/8W 2K 1 R5
220880203 Resistor RD 1/8W 20K 1 R1
220880204 Resistor RD 1/8W 200K 1 R23
220880205 Resistor RD 1/8W 2M 1 R22
220880222 Resistor RD 1/8W 2.2K 1 R36
220880223 Resistor RD 1/8W 22K 2 R45 R119
220880223L Resistor RD 1/8W 22K 52MM 1 R30
K
CS Series 300.1
10
Part Number Description Qty Reference Designator
220880242 Resistor RD 1/8W 2.4K 2 R24 R189
220880302 Resistor RD 1/8W 3K 5 R18 R38 R39 R150 R9
220880362 Resistor RD 1/8W 3.6K 2 R124 R187
220880363 Resistor RD 1/8W 36K 1 R50
220880392 Resistor RD 1/8W 3.9K 2 R129 R13
220880470 Resistor RD 1/8W 47Ω 2 R171 R172
220880472 Resistor RD 1/8W 4.7K 2 R173 R168
220880473 Resistor RD 1/8W 47K 5 R34 R102~R105
220880474 Resistor RD 1/8W 470K 2 R4 R128
220880562 Resistor RD 1/8W 5.6K 3 R120 R121 R125
220880563 Resistor RD 1/8W 56K 5 R106 R107 R108 R109 R51
220880682 Resistor RD 1/8W 6.8K 2 R16 R122
220880751 Resistor RD 1/8W 750Ω 1 R126
220880913 Resistor RD 1/8W 91K 2 R100 R101
230881001 Resistor MF 1/8W 1K 1% 1 R157
230881002 Resistor MF 1/8W 10K 1% 2 R19 R47
230881003 Resistor MF 1/8W 100K 1% 1 R114
230881052 Resistor MF 1/8W 10.5K 1% 1 R6
230882202 Resistor MF 1/8W 22K 1% 1 R8
230885601 Resistor MF 1/8W 5.6K 1% 1 R127
230886191 Resistor MF 1/8W 6.19K 1% 1 R170
202G15B23 VR B20K 2 VR101 VR103
202T15C52 VR C50K 1 VR102
231100100 Resistor 1Ws 10Ω 1 R31
231100220 Resistor 1Ws 22Ω 1 R37
23251002A Resistor SQM 5W 0.2Ω () 6 R180 R181 R182 R183 R184 R185
261T05103 Thermistor NTC THERMISTORD103J 10
1 RTH1
Capacitors
31J510110 Capacitor C/C NPO 100PF/100V J 5 C106 C107 C113 C114 C155
31K510210 Capacitor C/C 1000PF/100V K 2 C100 C101
31Z510305 Capacitor C/C Y5V 10000P/50V Z 1 C35
31Z510410 Capacitor C/C Y5V 0.1UF/100V Z 8 C6 C7 C8 C9 C10 C11 C31 C32
31J522010 Capacitor C/C NPO 22PF/100V J 1 C112
31J522110 Capacitor C/C NPO 220PF/100V 2 C12 C13
31J547010 Capacitor C/C NPO 47PF/100V J 3 C150 C151 C152
31K547110 Capacitor C/C Y5E470PF/100V K 1 C119
31K547310 Capacitor C/C 0.047UF/100V K 2 C38 C39
31J568125 Capacitor C/C Y5E 680P/250V K 1 C22
32J510410 Capacitor M/C 0.1UF/100V J 1 C157
32J518410 Capacitor M/C 0.18uf/100V J 1 C117
32J539310 Capacitor M/C 0.039UF/100V J 1 C118
32J568210 Capacitor M/C 0.0068uf/100V J 1 C20
32J582310 Capacitor M/C 0.082 UF/100V J 2 C115 C116
340Z10650 Capacitor 10UF/50V 5*11 3 C110 C111 C36
340Z10716 Capacitor 100U/16V 5*11 5 C4 C19 C27 C28 C156
340Z22550 Capacitor 2.2UF/50V 5*11 2 C33 C34
340Z22625 Capacitor 22UF/25V 5*11 8 C2 C103 C105 C21 C102 C104 C108 C109
340Z47550 Capacitor 4.7U/50V 5*11 1 C3
340Z47625 Capacitor 47UF/25V 5*11 3 C5 C14 C37
344Z22716 Capacitor 220UF/16V 6.3*12 2 C29 C30
370Z10550 Capacitor 1UF/50V 5*11 1 C154
370Z10716 Capacitor 100UF/16V 8*12 1 C18
370Z22616 Capacitor 22UF/16V NP 1 C1
391T10104 Capacitor (BOX) 0.1U/100V MEMB 1 C153
391T10474 Capacitor (BOX) 0.47U/100V J MEMB 2 C40 C41
341T22835 Capacitor 2200UF/35V 16*26 105C 3 C15 C16 C17
341T22863 Capacitor 2200UF/63V 22*27R 105C 4 C23 C24 C25 C26
CS Series 300.1
11
Part Number Description Qty Reference Designator
Miscellaneous
571T20070 Wire 1015# 20AWG 70MM 1 GND
172T41026 Coil T23*90-26 1.2*5 2.6uH 1 L1
181T37621 Transformer 37φ6:21 F=1.2*3*6 S=1.2*2*21 1 T1
435T00020 Fuse 20A ATC 2 F1
447T00001 Fuse Holder PCB Fuse holder 1 F1
524TRC04S RCA Jack RCA Jack 1 RCA1
535T25002 Connector 2P P=2.5MM 9 1 J3
541T34304 Terminal HD-343 4Pin 3.4 1 J2
544T300003 Terminal GA30-03-3Pin 1 J1
137T05B02 LED 5ψLED Blue 3 BLED1~3
647CS3001 Heat sink CS300.1 L=300 1
674CS3001 Rear panel CS300.1 1
680CS3001 Front panel CS300.1 1
CS Series 300.1
12
RCA1A
13
L RCA IN
R100 22K
4.7K
RCA1C
RCA2
100K
RCA1D
RCA2
100K
RCA1B
R RCA IN
R101 22K
4.7K
LO1
R110
RO1
R111
C102
22u/50v
C104
22u/50v
+
C100
10UF/25V NP
C110
10U/50V
C111
10U/50V
C103
22u/50v
C105
22u/50v
+
C101
10UF/25V NP
7
7
R102
47K
R104
47K
R103
47K
R105
47K
C106
101/C
IC101B
JRC4558
IC102B
JRC4558
C107
101/C
R106
56K
5
6
6
5
R108
56K
CS Series 300.1
IC101A
JRC4558
3
2
3
2
R107
56K
3
2
6
5
IC102A
JRC4558
R109
56K
IC106A
JRC4558
IC106B
JRC4558
1
C108
1
R112
22U
1K
R113
VR101A
1
1K
C109
22U
20K
7
R126
*330
1
3
2
R127
5.6K
R114
100K
C112
10P/C
JRC4558
IC103A
+15V
1
C113
101/c
R119
22K
R118
10K
84
C114101/C
R115
10K
6
5
84
84
IC103B
JRC4558
7
84
R120
5.6K
20K
VR102A
X-OVER
1
R122
6.8K
84
2
32Hz320Hz
3
84
C115
823/M
IC104A
JRC4558
R116
10K
R123
1K
20K
VR102B
X-OVER
R121
1
1
5.6K
32Hz320Hz
C116
823/M
6
5
IC104B
JRC4558
R117
10K
7
R124
3.6K
Odb
BASS TO 45HZ
VR103A
B20K
R128
470K
1
C117
184/MET
C118
393/MET
+6db
JRC4558
IC105B
5
6
3
2
R125
5.6K
R129
3.9K
JRC4558
IC105A
C119
471/C
7
IN1
1
IC101C
JRC4558
IC102C
JRC4558
IC103C
JRC4558
IC104C
JRC4558
IC105C
JRC4558
IC106C
JRC4558
-15V
TITLE:
DRAWN:
DWG NO:
JBL CS300.1
DATE: CHECKED: DATE:
CZJ
CS300.1-E-02 1/3
REV:
APPROVED:
1.0
DATE:
SHEET:
IN1
14
MUTING
CS Series 300.1
+15V
+VCC
C151
47/C
C150
47/C
C156
100U\16V
104/MET
R170
*13K
C152
47/C
R171
47
Q154
A56
Q162
A06
R172
47
C153
R173
4.7K
R189
2.4K
Q152
4401
Q155
TIP41
Q163
TIP42
R190
220
R174
4.7
R177
4.7
Q156
TIP35C
R180
R181
Q164
TIP36C
R175
4.7
R153
1K
0.2\5W
R163
0.2\5W
R178
4.7
R176
4.7
Q157
TIP35C
R182
R184
100
Q165
TIP36C
Q158
TIP35C
R183
R154
1K
0.2/5W
R185
R164
100
0.2/5W
Q166
TIP36C
R179
4.7
R186
2.7K
R155
1K
C154
0.2/5W
NP 1U/16V
R191
R165
4.7
100
0.2/5W
R158
1K
C157
104/M
-VCC
C36
10U/50V
R168
10K
R150
*1K
Q159
945
R151
*0
C155
101/C
R188
10K
R152
1K
Q150
5551
Q160
5401
R156
1K
R159
100
R161
R166
10K
Q151
5551
100
R169
10K
R160
R162
100
Q161
5401
R157
1K
+
100
-15V
Q153
A42
R187
3.6K
PROTECT
OUT
TITLE:
DRAWN:
CZJ
DWG NO:
JBL CS300.1
DATE: CHECKED: DATE:
CS300.1-E-02
REV:
1.0
APPROVED:
SHEET:
DATE:
2/3
PROTECT
15
100u/16V
C19
R16
6.8K
RTH1
10K
+
C3
22U/25V
PRO
R17
12K
R24
2.7K
R18
3K
C5
47U/25V
2M
R22
R11
10K
Q6
4403
R21
0
+
C4
220U/16V
C20
682/M
R35
18K
R36
2.2K
Q2
4401
R23
200K
D5
4148
R8
56K 1%
CS Series 300.1
D11
4148
104/C
1
2
3
4
5
6
7
8 9
C21
C6
U1
TL494
22U/16V
TL494
ZD2
11V
R19
4148
10.5K 1%
16
15
14
13
12
11
10
12VB1
D12
1
R52
10K
R48
10K
REM
C15 35V/1000U
D3
4148
C35
103/C
R5
2K 0.5W
8
7
6
5
L15MH
C16
R12
100k
R13
3.9K 0.5w
4148
D2
C22
681/C
D9
5402
10/0.25W
C2
22U/50v
1620AKA
D8
1 2
3
R37
22
D10
16C20KAK
R31
R4
470k
ZD6
15v
Q7
B647
R20
10k
47U-LL
R51
56K
R9
3k
R?
15k
ZD1
5.6V
Q3
TL431
C36
D4
4148
R14
1K
R15
1K
D6
4148
C12
221/C
Q9
4403
Q10
4403
C13
221/C
R50
36K
IRFZ46N
Q11
R25
100
R28
100
IRFZ46N
Q15
R6
27K 1%
84
IC2A
2
3
LM358
R47
R49
75K
22K 1%
D14
0
D13
4148
12VB1
*
R27
100
*
D7
4148
R30
C14
47U/16V
IRFZ46N
Q13
R26
100
R29
100
IRFZ46N
Q12
+12VB
22K
IRFZ46N
Q18
R44
100
R46
100
IRFZ46N
Q19
R10
10K
+12VB
C7
104/C
1000U/50V
T1
1
2
3
4
*
20A
F1A
1
3
20A
C17
1000u/35
NP22u/16v
C10
C25
2200/50V
C11
C26
2200/50V
R7
1K
+VCC
104/C
104/C
-VCC
F1B
R32
47/0.5W
R33
47/0.5W
C8
104/C
C9
Q1
K30
C23
2200/50V
C24
21
2200/50V
23
D1
4148
ZD3
15V
ZD4
15V
R1
100K
C1
NP22/16V
12
R38
3K
R39
3K
+12V
REM
PGND
Q14
TIP41
Q8
TIP42
MUTING
C27
100U/16V
C28
100U/16V
-15V
PROTECT
C29
C31
220U/16V
C30
C32
220U/16V
104/C
104/C
J1
1
2
3
3P
R34
47K
4401
+15V
-15V
-vcc
Q4
2.2U
R45
22K
Q5
4401
J2
OUT
R2
100K
R3
100K
R41
1K
C33
Q16
4401
R42
150K
ZD5
18V
12
LED3
B LED
LED2
B LED
LED1
B LED
C18
NP100U/16V
R43
150K
C34
R40
1K
Q17
4401
2.2U
1
2
CON2
J4
1
2
CON2
J3
4P
1
2
3
4
C38
C39
473
473
TITLE:
DRAWN:
CZJ
DWG NO:
JBL CS300.1
DATE: CHECKED: DATE:
CS300.1-E-02 3/3
REV:
1.0
APPROVED:
DATE:
SHEET:
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