Diagrams; Circuit Boards Location; Printed Wiring Boards And Schematic Diagrams - Sony KV-25FS12 Manual De Servicio

5-1. CIRCUIT BOARDS LOCATION

MB Board
5-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
• All capacitors are in µF unless otherwise noted. pF : µµF 50V or less
are not indicated except for electrolytics and tantalums.
• All electrolytics are in 50V unless otherwise specifi ed.
• Indication of resistance, which does not have one for rating electrical
power, is as follows:
Pitch : 5mm
Rating electrical power : 1/ 4 W (CHIP: 1/10W)
• All resistor are in ohms.
KW = 1000W MW = 1000KW
• : nonfl ammable resistor.
• : fusible resistor.
• : internal component.
• : panel designation and adjustment for repair.
• : earth ground
• : earth-chassis
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
• The components identifi ed by X in this basic schematic diagram
have been carefully factory-selected for each set in order to
satisfy regulations regarding X-ray radiation. Should replacement be
necessary, replace only with the value originally used.
• When replacing components identifi ed by Y, make the necessary
adjustments as indicated. If the results do not meet the specifi ed
value, change the component identifi ed by X and repeat the
adjustment until the specifi ed value is achieved (Refer to Safety
Related Adjustment on Page 14).
SECTION 5: DIAGRAMS
CB Board
VB Board
A Board
K Board
• When replacing the parts listed in the table below, it is important to
perform the related adjustments.
Part Replaced ( )
DY, T505, CRT, IC501 C507,
C520, C505, C509, C515, T504,
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525....................A Board
IC1301........................MB Board
• All voltages are in V.
• Voltages are DC with respect to ground unless otherwise noted.
• Readings are taken with a 10MW digital multimeter.
• Readings are taken with a color-bar signal input.
• Circled numbers are waveform references.
• *: cannot be measured
• : B+line
• : B-line
• : Signal path
REFERENCE INFORMATION
RESISTOR : RN
: RC
: FPRD
: FUSE
: RW
: RS
: RB
:
COIL : LF-8L
CAPACITOR : TA
: PS
: PP
: PT
: MPS
: MPP
: ALB
: ALT
: ALR
The components identifi ed by shading and
only with part number specifi ed.
The symbol indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
Les composants identifi es per un trame et une marque
securite. Ne les remplacer que par une piece portant le numero specifi e.
Le symbole indique une fusible a action rapide. Doit etre remplace par une
fusible de meme yaleur, comme maque.
— 21 —
KV-25FS12 / 25FS12C
Adjustment ( )
HV HOLD-DOWN
R564
METAL FILM
SOLID
NONFLAMMABLE CARBON
NONFLAMMABLE FUSIBLE
NONFLAMMABLE WIREWOUND
NONFLAMMABLE METAL OXIDE
NONFLAMMABLE CEMENT
ADJUSTMENT RESISTOR
MICRO INDUCTOR
TANTALUM
STYROL
POLYPROPYLENE
MYLAR
METALIZED POLYESTER
METALIZED POLYPROPYLENE
BIPOLAR
HIGH TEMPERATURE
HIGH RIPPLE
!
symbol are critical for safety. Replace
!
sont critiques pour la