Sony Trinitron CPD-420GS, Service Manual

Page: 19 / 51

5-1. BLOCK DIAGRAM
SECTIONS 5
DIAGRAMS
—19—
—20—
—21— —22—
CPD-420GS/GST
5-2. CIRCUIT BOARDS LOCATION
5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS
Note :
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F 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 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
required, replace only with the value originally used.
• When replacing components identified by , make the necessary
adjustments by using RV904 ( ) as indicated. (See page 14)
Note:
The components identified by shading and mark are
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.
• When replacing parts shown in the table below, be sure to perform
the safety related adjustment.
• 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.
D - BOARD
Part Replaced ( )
RV904
Part Replaced ( )
T901, R903, IC805, R921, R922, R812, D908,
IC605, R913, R914, D802, D909
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