Sony KE-50XBR900 Service Manual - Page 53

4-4. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS Note: • All capacitors are in µF unless otherwise noted. (pF: µµF) Capacitors without voltage indication are all 50 V. • Indication of resistance, which does not have one for rating electrical power, is as follows. Pitch: 5 mm Rating electrical power 1/4 W (CHIP : 1/10 W) • All resistors are in ohms. • : nonflammable resistor. • : fusible resistor. • T : internal component. • : panel designation, and adjustment for repair. • All variable and adjustable resistors have characteristic curve B, unless otherwise noted. • : earth-ground. • : earth-chassis. • When replacing the part in below table, be sure to perform the related adjustment. • All voltages are in V. • Readings are taken with a 10 M digital multimeter. • Readings are taken with a color-bar signal input. • Voltage variations may be noted due to normal production tolerances. * • : Can not be measured. • Circled numbers are waveform references. • : B + bus. • : B - bus. Note: The components identified by shading and mark ! are critical for safety. Replace only with part number specified. • Divided circuit diagram Schematic diagrams of A, G, MS, TU and U boards are divided into serveral pieces. Information to where the line is to be connected is printed at the end of wach line. For example, [ TO A1/12, A2/12_1 ] means the line is connected to Ref. No. 1 of A (1/12) and A (2/12) schematic diagrams. TO A1/12, A2/12_1 Ref. No. Circuit diagram division code Note: Les composants identifiés par un tramé et une marque ! sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. Terminal name of semiconductors in silk screen * printed circuit ( ) Device Printed symbol 1 Transistor Terminal name Collector Base Emitter Circuit 2 Transistor Collector Base Emitter 3 Diode 4 Diode 5 Diode Cathode Anode Cathode Anode (NC) Cathode Anode (NC) 6 Diode Common Anode Cathode 7 Diode 8 Diode Common Anode Cathode Common Anode Anode 9 Diode 0 Diode Common Anode Anode Common Cathode Cathode qa Diode qs Diode Common Cathode Cathode Anode Cathode Anode Anode Cathode Anode Transistor qd (FET) Transistor qf (FET) qg Transistor (FET) qh Transistor Source Drain Gate G Source Drain Gate D Source Drain Gate S Emitter Collector Base - Discrete semiconductot (Chip semiconductors that are not actually used are included.) D G S D G S D S G Ver.1.6 KE-50XBR900(UC) 4-18