Schematic Diagrams And Printed Wiringboards - Sony KE-42XBR900 Service Manual

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.
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.
• 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
Terminal name of semiconductors in silk screen
printed circuit ( )
*
Device Printed symbol Terminal name
Collector
Transistor
1
Base Emitter
Collector
Transistor
2
Emitter
Base
Cathode
3
Diode
Anode
Cathode
4 Diode
(NC)
Anode
Cathode
5 Diode
Anode (NC)
Common
Diode
6
Anode Cathode
Common
Diode
7
Anode Cathode
Common
8
Diode
Anode
Anode
Common
9 Diode
Anode Anode
Common
Diode
0
Cathode Cathode
Common
qa
Diode
Cathode
Cathode
Anode
Cathode
Diode Anode
qs Anode
Anode
Cathode
Transistor Source
qd Drain
(FET) Gate
Source
Transistor
Drain
qf
(FET) Gate
Source
Transistor
qg Drain
(FET)
Gate
Emitter
Collector
qh Transistor
Base
–
Discrete semiconductot
(Chip semiconductors that are not actually used are included.)
KE-42XBR900(UC)
Circuit
D D
G G
S S
D D
G G
S S
Ver.1.6
4-18