STUDIO 120C - JBL Audio Service Manual (repair manual)

studio 120c service manual
Model
STUDIO 120C
Pages
2
Size
767.2 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
studio-120c.pdf
Date

Read JBL STUDIO 120C Service Manual online

Release Date 2010       Discontinued Date XXXX
Technical Manual
STUDIO 120c
                   
         
AURAL-SWEEP TEST SPECIFICATIONS:
•  System aural-sweep test:
6.0V input 60Hz to 20kHz
•  LF1 aural-sweep test:
5.0V input 60Hz to 1kHz
•  LF2 aural-sweep test:
5.0V input 60Hz to 2kHz
•  HF aural-sweep test:
2.83V input 2kHz to 20kHz
PHYSICAL SPECIFICATIONS:
•  Dimensions (W x H x D):
21" x 6-1/2" x 9-7/8"  
 
(533mm x 165mm x 251mm)
•  Weight:  
18.6 lb (8.4kg) each
WARRANTY:
•  Refer to the warranty statement packed with the product.
*   The maximum recommended amplifier power rating will  
ensure proper system headroom to allow for occasional  
peaks. We do not recommend sustained operation at these 
maximum power levels.
STUDIO 
120c
11/10
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
•  Nominal impedance:
8 ohms
•  Maximum amplifier power:  60W continuous; 240W peak*
• Frequency response:
60Hz – 22kHz
•  Sensitivity:
90dB (2.83V/1m)
•  Crossover frequencies:
900Hz, 12dB/octave
 
1.8kHz, 24dB/octave
SYSTEM COMPONENTS:
•  Cabinet:  
Studio 120c cabinet (not for sale)
• Left grille:
Studio 120c left grille
   
(244-040-05438-0BAE)
•  Right grille:
Studio 120c right grille
   
(244-040-05437-0BAE)
•  Low-frequency transducer:  2 x 4" (101mm) PolyPlas
cones,
   
shielded (10NR80BAK-JW01-EP)
    DC resistance:
9.3 ohms ±10% 
 
•  High-frequency transducer:  1" (25mm) CMMD
®
Lite dome,
   
shielded (36DT25BX-DT01-E)
   DC resistance:
3.6 ohms ±10%
•  Crossover network:
013-7600-05821-E
INPUT
+
LF1
HF
LF2
RED 50mm
WHITE 200mm
GREEN 300mm
BLACK 200mm
BLACK 300mm
BLACK 300mm
YELLOW 300mm
BLACK 50mm
L1: 3.9mH
L2
0.91mH
L3
0.24mH
R2
1.0 ohms
5W
R3
9.1 ohms
10W
R1: 4.3 ohms/10W
+
+
+
C1
20μF
100V
C3
7.5μF
100V
C2: 11μF/100V
.250
.205
.205
.110
.250
.205
STUDIO 120c WIRING DIAGRAM
21
24
24
20
26
22
23
25
Legend on Page 2
STUDIO 120c SCHEMATIC
PACKAGING
+
+
+
+
LOW-FREQUENCY
TRANSDUCER 2
10NR80BAK-JW01-EP
LOW-FREQUENCY
TRANSDUCER 1
10NR80BAK-JW01-EP
CROSSOVER
NETWORK
013-7600-05821-E
HIGH-FREQUENCY
TRANSDUCER
36DT25BX-DT01-E
BLACK
WHITE
BLACK
BLACK
RED
BLACK
YELLOW
GREEN
Technical Manual
STUDIO 120c
STUDIO 
120c
EXPLODED VIEW
HARMAN Consumer, Inc. 
 
 
 
 
 
 
 
 
     
 
           
 
 
© 2010 HARMAN International Industries, Incorporated. All rights reserved. JBL and CMMD are trademarks of HARMAN International Industries, Incorporated, 
registered in the United States and other countries. PolyPlas is a trademark of HARMAN International Industries, Incorporated.
Features, specifications and appearances are subject to change without notice.
11/10
TO SERVICE THE STUDIO 120c:
Right Woofer or Tweeter: Remove the right grille. Remove the four screws holding the right woofer using a 2.5mm hex key (Allen wrench). If the woofer
will not come out of the cabinet easily, use a dowel or hammer handle inserted into the rear port tube opening to tap the woofer out. If the tweeter needs
service and the horn will not pull out of the cabinet easily, do not use a tool on the protector bars on the front of the horn, as they may break. You will
need to remove the right woofer, reach into the cabinet through the woofer opening and tap the tweeter out of the cabinet. Remove the bar that attaches
the tweeter to the horn using a Phillips screwdriver.
Left Woofer: Remove both grilles. Remove all six grille cups in the front bezel with a needle-nosed pliers or similar tool. Remove all six bezel screws
using a 2.5mm hex key. Remove the bezel by pulling it straight out from the cabinet. Remove the four screws holding the left woofer using a 2.5mm hex
key. If the woofer will not come out of the cabinet easily, remove the right woofer (see above), reach into the cabinet through the woofer opening and
push the left woofer out of the cabinet.
www.jbl.com
1
2
4
9
8
14
13
12
11
10
17
16
18
15
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6
5
3

 1  Not for Sale
Studio 120c Cabinet
1
 
(Black, Black w/Grain, Cherry)
 2  013-7600-05821-E
Crossover Network/Terminal Cup
1
 3  350-EM03520D082-E
Screws, Terminal Cup T3.5*20
4
 4  333-EVA-06008-0BAE
Gasket, Tweeter Horn
1
 5  233-013-05320-0BAE
Tweeter Horn
1
 6  214-036-05435-0BAE
Gasket, Tweeter
1
 7  36DT25BX-DT01-E
1" Tweeter
1
 8  398-ABS-05062-E
Plastic Bar, Tweeter
1
 9  352-AM03512D121-E
Screws, Tweeter T3.5*12
2
 10  10NR80BAK-JW01-EP
4" Woofer
2
 11  213-040-05225-0BAE
4" Trim Ring
2
 12  350-KM03520D077-E
Screws, Woofer, Tweeter Horn T3.5*20
12
 13  301-ABS-05132-0BAE
Plastic Bezel
1
 14  350-KM03516D076-E
Screws, Bezel T3.5*16
6
 15  327-010-05055-0BAE
Grille Cup
9
 16  316-AL-05412-0VAE
JBL
®
Logo
1
 17  244-040-05437-0BAE  Grille, Right
1
 18  244-040-05438-0BAE  Grille, Left
1
 19  Not for Sale
Port Tube (Not Shown)
2
 20  Not for Sale
Plastic Bag
1
 21  402-000-06480-E
Studio 120c Outer Carton, Cherry (CH)
1
 402-000-06497-E
Studio 120c Outer Carton, Black w/Grain (BK) 1
 402-000-06495-E
Studio 120c Outer Carton, Black
1
 22  Not for Sale
Warranty Card
1
 23  320-RUB-00504-E
Rubber Feet (set of 4)
1
 24  431-000-07210-E
Foam, Top, Bottom
2
 25  Not for Sale
Desiccant
2
 26  Visit www.jbl.com
Studio Series Owner’s Manual
1
    ITEM   
    NO.  PART NO. 
DESCRIPTION 
QTY.
   ITEM   
   NO.  PART NO. 
DESCRIPTION 
QTY.
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Here you can read online and download JBL STUDIO 120C Service Manual in PDF. STUDIO 120C service manual will guide through the process and help you recover, restore, fix, disassemble and repair JBL STUDIO 120C Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.