Circuit Boards Location; Schematic Diagrams And Printed Wiring Boards - Sony SDM-N50PS Service Manual

4-2. CIRCUIT BOARDS LOCATION

DISPLAY
B
MEDIA ENGINE
G
A
H
4-7
4-3. 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.
f
• : nonflammable resistor.
F
• : fusible resistor.
¢
• : internal component.
p
• : panel designation, and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
e
• : earth-ground.
E
• : earth-chassis.
• 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.
s
• : B + bus.
S
• : B – bus.
• Divided circuit diagram
One sheet of A, U boards circuit diagrams are divided into two
sheets, each having the code A-P1-a to A-P1-b, A-P2-a to
A-P2-b, A-P3-a to A-P3-b. For example, the destination
ab1 on the A-P1-a sheet is connected to ab1 on the A-P1-b
sheet.
a b 1
Ref. No.
Circuit diagram division code
Note: The components identified by shading and mark
! are critical for safety. Replace only with part
number specified.
Terminal name of semiconductors in silk screen
printed circuit ( * )
Circuit
Device Printed symbol Terminal name
Collector
1
Transistor
Emitter
Base
Collector
2
Transistor
Base Emitter
3 Cathode
Diode
Anode
Cathode
4
Diode
Anode (NC)
Cathode
5
Diode
(NC)
Anode
Common
6
Diode
Anode Cathode
Common
7
Diode
Anode Cathode
Common
8
Diode
Anode Anode
Common
9
Diode
Anode Anode
Common
0
Diode
Cathode
Cathode
Common
!¡
Diode
Cathode Cathode
Anode
Cathode
!™
Diode Anode Anode
Cathode Anode
Transistor Source
!£
Drain
D
(FET) Gate
G G
Source
Transistor
!¢ S
Drain
(FET) Gate
D D
Source
Transistor
!∞
Drain G
(FET) Gate
S S
– Discrete semiconductot
(Chip semiconductors that are not actually used are included.)
Note: Les composants identifiés per un tramé et une
marque ! sont critiques pour la sécurité. Ne les
remplacer que par une pièce portant le numéro
spécifié.
4-8
D
S
G
Ver.1.6