Hitachi 27CX22B free download

File name 27CX31B.pdf

SERVICE 1 NTSC ] MANUAL 1 GXCHASSIS 1 WC: 27CX31 B 511 27CX31 B 521 CLU-418U2 CLU-411 ou CAUTION: Before servicing this chassis, it is important that the service technician read the "Safety Precautions" and "Product Safety Notices" in this Service Manual. This television receiver will display television Closed Captioning (pi ) or ( I)) in accordance with paragraph 15.119 of the FCC rules) TABLE OF CONTENTS Introduction ... 1 2 4 5 ... Procedure ... 7 8 10 13-l 8 Interconnect Diagram ... ... ... ... 19 20 25 26 27 28 29 30 31 Service Menu ... Factory Settings Servicing ... Main Module Schematics Main Module S.M.D. Layout Main Module Component PIP Module Schematic Jack Pack Schematic Keyboard Schematic Remote Schematic Tuner Schematic ... Layout ... IF and Audio Alignment Purity & Convergence Remote Control Component ... ... ... ... ... Parts List ... SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT SOLID STATE COLOR TELEVISION JULY 1997 HHEA - MANUFACTURING DIVISION PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturer's approval. Unauthorized modifications will not only void the warranty, but may Iead to your being liable for any resulting property damage or user injury. Service work should be performed only after you are thoroughly familiar with all of the following safety checks and servicing guidelines. To do otherwise increases the risk of potential hazards and injury to the user. While servicing, use an isolation transformer for protection from AC line shock. SAFETY CHECKS problem has been corrected, PRODUCTS X-RADIATION 1. Be sum procedures and instructions to all service personnel cover the subject of x-radiation. The only potential source of x-rays in current TV receivers is the picture tube. However, this tube does not emit x-rays when the HV is at the factory-specified level. The proper value is also given in the applicable schematic. Operation at higher voltages may cause a failure of the picture tube or high voltage supply and, under certain circumstances, may produce radiation in excess of desirable levels. 2. Only factory-specified CRT anode connectors must be used. The degaussing shield also serves as an x-ray shield in color sets. Always m-install them. 3. It is essential that the service personnel have available an accurate and reliable high voltage meter. The calibration of the meter should he checked periodically against a reference standard, such as the one available at your distributor. 4. When the high-voltage circuitry is operating properly, there is no possibility of an x-radiation problem. Every time a color chassis is serviced, the brightness should be run up and down while monitoring the high voltage with a meter, to be