Section 3: Diagrams; Circuit Boards Location; Printed Wiring Boards And Schematic Diagrams Information - Sony KF-42WE620 Service Manual

3-1. CIRCUIT BOARDS LOCATION

3-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS INFORMATION
All capacitors are in µF unless otherwise noted. pF : µµF 50WV 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:
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.
KF-42WE620/50WE620

SECTION 3: DIAGRAMS

H2
H1
G1
A
F
G3
Pitch : 5mm
Rating electrical power :
1
/ W in chip resistance.
16
UD
T
H4
RF antenna
switch
AU
C2
DIC2
U
All voltages are in V.
S : Measurement impossibility.
: B+line.
: B-line. (Actual measured value may be different).
: signal path. (RF)
Circled numbers are waveform references.
1 / W
4
Divided schematic diagram:
Schematic diagrams of A, BB, BC, M, and U boards are divided into
several pieces. Information to where the line is to be connected is
printed at the end of each line.
For example: [TO A1/3, A2/3_1] means the line is connected to Ref.
No. 1 of A (1 of 3) and A (2 of 3) schematic diagrams.
TO A1/3,A2/3_1
KF-42WE620/50WE620
H3
C1
Power supply
block
Ref. No.
Name of divided schematic diagram
94