JBL ESC200 Service Manual

ESC200
Dolby Pro-Logic Surround
Processor/Amplifier
JBL Consumer Products Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Part No.: 1112-ESC200 Rev A 10/98
SERVICE MANUAL

JBL ESC200 Specifications

General

Input Sensitivity	1.1V
Input Impedance	20kΩ
Signal to Noise Ratio	>100dB
Signal-to-Noise Ratio	>100dB
THD	<0.05%
Power Output	200W per channel at 4Ω

Summary

ESC200 SPECIFICATIONS

CONTROLS AND THEIR FUNCTION

ESC200 SPEAKER AND SOURCE CONNECTIONS

Illustrates how to connect speakers and audio sources to the unit.

ESC200 PACKING

ESC200 BLOCK DIAGRAM

ESC200 UNIT EXPLODED VIEW

ESC200 PARTS LISTS

MISCELLANEOUS SECTION

KEY PCB SECTION

ESC200 KEYPAD PCB

ESC200 MAIN PCB (Component Side)

ESC200 MAIN PCB (Solder Side)

INTEGRATED CIRCUIT DIAGRAMS

IC U1 - NJM2177AL Dolby Pro-Logic Surround Decoder

Diagram for the Pro-Logic surround decoder IC.

IC U2 - NJU9701D/NJU9702D Digital Delay

Diagram for the digital delay IC.

IC U3 - CD 4066D QUAD BILATERAL SWITCH

Diagram for the quad bilateral switch IC.

IC U4 - BA14741 ROM QUAD OP AMP

Diagram for the quad operational amplifier IC.

IC U5, U10, U11, U12 - BA4560/4560D DUAL OP-AMP

Diagrams for the dual operational amplifier ICs.

IC U6, U7, U8 - LC7538NM ELECTRONIC VOLUME CONTROL

Diagrams for the electronic volume control ICs.

ESC200 IC VOLTAGE READINGS

SCHEMATIC DIAGRAM 1 120V VERSION

ESC200 SCHEMATIC 2 OF 4 (120 & 230 Volt VERSIONS)

ESC200 SCHEMATIC 3 OF 4 (120 Volt VERSION)

ESC200 SCHEMATIC 4 OF 4 (120 Volt VERSION)

SCHEMATIC DIAGRAM 1 230V VERSION

ESC200 SCHEMATIC 3 OF 4 (230 Volt VERSION)

ESC200 SCHEMATIC 4 OF 4 (230 Volt VERSION)