Circuit Boards Location; Schematic Diagrams And Printed Wiring Boards - Sony Trinitron CPD-420GS Service Manual

5-2. CIRCUIT BOARDS LOCATION

5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS

Note:
All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or
•
less are not indicated except for electrolytic.
• 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.
• : 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.
• The components identified by
have been carefully factory-selected for each set in order to satisfy
regulations regarding X-ray radiation.
required, replace only with the value originally used.
• When replacing components identified by
adjustments by using RV904 ( ) as indicated. (See page 14)
Note:
The components identified by shading and mark
critical for safety. Replace only with part number specified.
Note:
Les composants identifies per un trame et une marque
sont critiques pour la sécurité. Ne les remplacer que par
une pièce portant le numéro spécifie.
in this basic schematic diagram
Should replacement be
, make the necessary
are
—22—
• When replacing parts shown in the table below, be sure to perform
the safety related adjustment.
D - BOARD
Part Replaced ( )
Part Replaced ( )
T901, R903, IC805, R921, R922, R812, D908,
IC605, R913, R914, D802, D909
• All voltages are in volts.
Readings are taken with a 10 ΜΩ digital multimeter.
•
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal production
tolerances.
• * : Cannot be measured.
• Circled numbers are waveform references.
• : B +bus.
• : B - bus.
RV904