Sharp 37GQ20S 37GQ21S free download

File name Sharp-37GQ20S_37GQ21S.pdf

37GQ-20S 37GQ-21S SERVICE MANUAL SEJB37GQ2*S02 Issued: 9th June `00 SQUAD CHASSIS PAL SYSTEM COLOUR TELEVISION MODELS: 37GQ-20S 37GQ-21S In the interests of user safety (required by safety regulations in some countries) the set should restored to its original condition and only parts identical to those specified should be used. CONTENTS ELECTRICAL SPECIFICATION...2 IMPORTANT SERVICE NOTES...3 SERVICE ADJUSTEMENTS...4 PRINTED WIRING BOARDS...11 SCHEMATIC DIAGRAM, WAVE FORMS... .13 PART LIST...18 TROUBLESHOOTING TABLES...23 SHARP CORPORATION 1 This document has been published to be used for after sales service only. 37GQ-20S 37GQ-21S ELECTRICAL SPECIFICATIONS ·Power Input ...220V-240 Volts AC 50Hz ·Power Consumption Normal Operating...30W Stand-by Operating...7.5W (Method IEC60107) ·Audio Power Output Rating ...2W (MPO) Speaker...32 2W, 8cm Round, 1pc Convergence...Self Converging System Focus...Bi-Potencial Electrostatic Sweep Deflection...Magnetic ·Picture Intermediate Frecuencies B/G...38.9MHz ·Tuning Ranges B/G...48.25MHz thru 855.25 MHz CATV Special Channels ·Adjacent Sound Carrier Trap B/G...40.4MHz ·Adjacent Picture Carrier Trap B/G...30.9MHz ·Sound Carrier Trap B/G...33.4MHz ·Aerial Input Impedance VHF/UHF...75 ohm Unbalanced ·White Level Set brightness control to get total picture tube cathode current of 600 milliamperes under no signal condition. Maximum necessary correction of each picture tube cathode current to get 8550 degree K-20 MPCD screen temperature should not exceed 15% of its original value. X=0.290 Y=0.300 Specifictions are subject to change without prior notice. WARNING The chassis in this receiver is partially live. Alwais use an isolation transformer when servicing this chassis. To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel. MODEL DESTINATION & DIFFERENCES: 37GQ-20S DE: Autria 37GQ-20S DES: Germany (Silver) 37GQ-20S ES: Spain 37GQ-20S IT: Italy 37GQ-20S NL: Holland 37GQ-20S SE: Sweden 37GQ-21S ESY: Spain (Yellow, with headphones) 37GQ-21S ESR: Spain (Red, with headphones) 2 37GQ-20S 37GQ-21S IMPORTANT SERVICE NOTES Maintenance and repair of this receiver should be done by qualified service personnel only. SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE When servicing the high voltage sy