JBL MS-8 Service Manual

- CONTENTS -
SPECIFICATIONS ………………………………………..1
PACKAGING……………..…………………………..…....2
NOTICE REGARDING TESTING THE UNIT…….….…3
CONNECTIONS ……………………………..……………4
RESETTING THE MICROPROCESSOR………..…….15
REMOTE CONTROL …………….….…………..………16
TROUBLESHOOTING……………..…..…………………17
EXPLODED VIEW/PARTS LIST……...….….………….22
AMPLIFIER BLOCK DIAGRAM…….……………..….…23
ELECTRICAL PARTS LIST ..….…….……….…………26
P.C.B. DRAWINGS….……………………………….……30
IC/TRANSISTOR PINOUTS..…………….……….….…..37
SCHEMATICS……………...……………….………..…...93
MS-8 Specifications
Power Output: 20W x 8 channels @ 4 ohms
Maximum Output Power: 30W x 8 channels @ 2 ohms
Frequency Response: 20Hz–20kHz
Signal-to-Noise Ratio (Line Input to Line Output): >90dB
Signal-to-Noise Ratio (Line Input to Spkr Output): >85dB
Maximum Input Voltage (Speaker-Level Input): 15V
Maximum Input Voltage (Line Input): 2.8V
Maximum Output Voltage (Line Output): 2.8V
Maximum Current Draw: 16A
Standby Current Draw: <0.01A
Display LCD Screen: 128 x 64 pixels
Power Requirement: 12V DC, negative ground
Main Unit Dimensions (L x W x H): 11-1/2" x 7-3/8" x 2-1/8" (293mm x 187mm x 55mm)
Display Unit Dimensions (H x W x D, w/ stand): 3-1/8" x 3-3/8" x 2-7/16" (79mm x 86mm x 62mm)
Weight: Main unit – 6.4 lb (2.9kg)
Display unit – 2.8 oz (80g)
Remote control – 1.4 oz (40g)
Fuse 25A
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.
MS-8
1

JBL MS-8 Specifications

General

Amplifier class	-
Frequency range	20 - 20000 Hz
Audio output channels	5.1 channels
Peak power per channel	30 W
Signal-to-Noise Ratio (SNR)	85 dB
Total Harmonic Distortion (THD)	- %
RMS power output per channel (4 Ohm)	18 W
DC-in jack	Yes
Purpose	Car
Product color	Black, White
Connectivity technology	Wired
Built-in display	No