Crown Audio 2400 service manual

Micro-Tech 2400 Amplifier Service Manual

MICRO-TECH®-2400

POWER AMPLIFIER

SERVICE MANUAL

K-SVCMT24

7-95

Micro-Tech®, ODEP® and Crown® are registered trademarks of Crown International, Inc.

Mailing Address:

P.O. Box 1000

Elkhart, IN U.S.A. 46515-1000

Shipping Address:

57620 C.R. 105

Elkhart, IN U.S.A. 46517

Contents

Main MICRO-TECH-2400 POWER AMPLIFIER SERVICE MANUAL CAUTION AVIS WARNING Table of Contents Introduction Crown SCOPE WARRANTY Parts Information TERMS GENERAL INFORMATION PART NUMBERING SYSTEMS STANDARD AND SPECIAL PARTS Specifications Voltage Conversion VOLTAGE SELECTION BOARD OVERVIEW FEATURES FRONT END OPERATION VOLTAGE AMPLIFICATION GROUNDED BRIDGE TOPOLOGY + - OUTPUT DEVICE EMULATION PROTECTION (ODEP) Micro-Tech 2400 Amplifier Service Manual Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown) 12 GENERAL INFORMATION STANDARD INITIAL CONDITIONS TEST 1: DC OFFSET TEST 2: OUTPUT BIAS ADJUSTMENT TEST 3: ODEP VOLTAGE ADJUSTMENT In Out TEST 14: ODEP LIMITING TEST 15: LF PROTECTION TEST 16: SIGNAL TO NOISE RATIO TEST 17: TURN ON TRANSIENTS TEST 18: TURN OFF TRANSIENTS SUPPLIMENTAL ITEMS POWER SUPPLY OUTPUT ASSEMBLY (ONE PER CHANNEL) OUTPUT ASSEMBLY CONT. (ONE PER CHANNEL) BACK PANEL ASSEMBLY CHASSIS FRONT ASSEMBLY MAIN CHASSIS ASSEMBLY MISCELLANEOUS Module Information M46330-3 Fuse Module & Q43327-8 Display Module Parts List M46330-3 FUSE MODULE Q43327-8 DISPLAY MODULE Q43354-2 Output Module Parts List (P10429-2 Board) INDUCTORS Q43328-6 Main Module Parts List (D8679-9 Board) LED's Q43328-6 Main Module Parts List Cont. (D8679-9 Board) RESISTOR NETWORKS Q43328-6 Main Module Parts List Cont. (D8679-9 Board) SWITCHES TEST POINTS INTEGRATED CIRCUITS Page Q43399-7 Main Module Parts List (D8827-4 Board) LED's Q43399-7 Main Module Parts List Cont. (D8827-4 Board) RESISTOR NETWORKS Q43399-7 Main Module Parts List Cont. (D8827-4 Board) SWITCHES TEST POINTS INTEGRATED CIRCUITS