Circuit Boards Location; Schematic Diagrams - Sony KDS-50A2000 Service Manual

4-3. CIRCUIT BOARDS LOCATION

C
H3
H1
H2
QT
S2
T
B1
Power Supply
Block

4-4. SCHEMATIC DIAGRAMS

Note:
• The parts marked "#" on schematic diagrams are not mounted.
• 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.
• 5 : fusible resistor.
• : internal component.
• : panel designation, and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
• : earth-ground.
• : earth-chassis.
• All voltages are in V.
• Readings are taken with a 10 MΩ 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.
V
• : B + bus.
• : B – bus.
V
• F : Signal path.
A1
S1
QM
G
Reference information
RESISTOR : RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
COIL : LF-8L MICRO INDUCTOR
CAPACITOR : TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
Note: The components identified by shading and mark
0 are critical for safety. Replace only with part
number specified.
Note: Les composants identifies par une trame et une
marque 0 sont critiques pour la securite.
Ne les remplacer que par une piece portant le numero
specifie.
– 37 –
KDS-50A2000/50A2010/55A2000/60A2000/60A2010
K
RM-YD010 RM-YD010 RM-YD010 RM-YD010
Terminal name of semiconductors in silk screen
printed circuit ( * )
Device Printed symbol Terminal name
Collector
1 Transistor
Emitter
Base
Collector
Transistor
2
Emitter
Base
Cathode
3 Diode
Anode
Cathode
4
Diode
(NC)
Anode
Cathode
5 Diode
(NC)
Anode
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
qs Diode Anode Anode
Cathode Anode
Source
Transistor
Drain
qd
(FET)
Gate
G
Source
Transistor
Drain
qf
(FET) Gate
D
Source
Transistor
qg Drain
(FET)
Gate
S
Emitter
qh Transistor Collector
Base
C2 B1 E1
qj Transistor
B1
E2 B2 C1
C1 B2 E2
Transistor
qk
E1 B1 C2
B1
C1 B2 E2
ql Transistor
E1 B1 C2
C1 B2 E2
w; Transistor
B1
E1 B1 C2
C1(B2)
E2
B1 E1
Transistor
wa B1
C2 C1(B2)
(B2) E1(B2)
B1 E1 E2
Transistor
ws B1
C1 C2
(B2) E1(B2)
E2 E1 B1
wd Transistor
B1
C2 C1
–
Discrete semiconductot
(Chip semiconductors that are not actually used are included.)
RM-YD010
Circuit
D D
G
S S
D
G G
S
C1 C2
B2
E1 E2
C1 C2
B2
E1 E2
E1 E2
B2
C1 C2
C2
E2 E2
E2
C1 C2
C2
C1 C2
Ver.1.5