Section 5: Diagrams; Circuit Boards Location; Printed Wiring Boards And Schematic Diagrams Information - Sony KV-21FS105 Service Manual

5-1. CIRCUIT BOARDS LOCATION

CB Board
MB Board
5-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS INFORMATION
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.
All resistors are in ohms. kΩ=1000Ω, MΩ=1000kΩ
Indication of resistance, which does not have one for rating electrical
power, is as follows: Pitch : 5mm
Rating electrical power :
1 1 1
/ W in resistance, / W and
4 10
: 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.
Readings are taken with a color-bar signal input.
Readings are taken with a 10MΩ digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibility.
KV-21FS105

SECTION 5: DIAGRAMS

A Board
1
/ W
4
/ W in chip resistance.
8
The components identifi ed by shading and
Replace 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.
: B+line
: B-line (Actual measured value may be different).
: signal path (RF)
Circled numbers are waveform references.
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 R562 adjustment on page 15.)
When replacing the parts listed in the table below, it is important to
perform the related adjustments.
Part Replaced (
DY, T505, CRT, IC1301, IC501, C507,
C520, C505, C509, C515, T504,
L508, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525........................A Board
IC601, PH601...................A Board
REFERENCE INFORMATION
RESISTOR
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
: ADJUSTMENT RESISTOR
COIL
: LF-8L MICRO INDUCTOR
KV-21FS105
!
symbol are critical for safety.
) Adjustment ( )
HV HOLD-DOWN
(R562)
B+ VOLTAGE
CONFIRMATION
CAPACITOR
: TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
23