Crown K1 - Page 6

K Series Service Manual
Rev. A
©1999 Crown International, Inc.
Table of Contents
V
5.2.1 Cover Removal ........................................................ 5-1
5.2.2 Power Supply Discharge ......................................... 5-2
5.2.3 Back Panel Assembly Removal............................... 5-2
5.2.4 Front Panel Assembly Removal............................... 5-3
5.2.5 Input PWA Removal ................................................. 5-3
5.2.6 Main PWA Removal ................................................. 5-3
5.2.7 Output PWA Removal .............................................. 5-4
5.2.8 Control PWA Removal ............................................. 5-4
5.2.9 Line Filter PWA Removal ......................................... 5-4
5.2.10 Power Transformer Removal.................................. 5-4
5.2.11 Display PWA Removal ........................................... 5-5
5.2.12 Bridge PWA Removal ............................................ 5-5
5.3 Troubleshooting ............................................................... 5-6
5.3.1 Identifying Symptoms .............................................. 5-6
5.3.2 Identifying and Repairing the Cause ....................... 5-6
5.4 Required Test Equipment................................................. 5-8
5.5 Electrical Checkout Procedures....................................... 5-8
5.5.1 Quiescent AC Power Draw ...................................... 5-9
5.5.2 Gain Switches.......................................................... 5-9
5.5.3 “Y” Input Switch Operation ...................................... 5-9
5.5.4 Bridge Mono Operation ........................................... 5-9
5.5.5 Frequency Response ............................................ 5-10
5.5.6 Short Circuit Test ................................................... 5-10
5.5.7 Output Power......................................................... 5-10
5.5.8 Intermodulation Distortion ..................................... 5-10
5.5.9 Signal to Noise Ratio ............................................. 5-10
5.5.10 Crosstalk at 1 kHz................................................ 5-10
5.5.11 Post Test Settings ................................................ 5-11
5.6 Calibrations.................................................................... 5-11
5.6.1 Gaussian Filter Calibration .................................... 5-11
5.6.2 Overlap Correction and Adjustment ...................... 5-11
6 Parts ....................................................................................... 6-1
6.1 General Information ......................................................... 6-1
6.2 Ordering and Receiving Parts ......................................... 6-1
6.2.1 Terms ....................................................................... 6-1
6.2.2 Shipment ................................................................. 6-1
7 Exploded View Parts .............................................................. 7-1
7.1 General Information ......................................................... 7-1
7.2 Main Chassis Assembly................................................... 7-3
7.3 Front Panel Assembly ...................................................... 7-5
7.4 Back Panel Assembly ...................................................... 7-7