Dell D825TM Manual de serviço - Página 15

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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.
f
•
: nonflammable resistor.
F
•
: fusible resistor.
∆
•
: internal component.
p
•
: panel designation and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
e
•
:
earth-ground.
E
•
:
earth-chassis.
•
The components identified by
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 RV501 ([) as indicated. (See page 12)
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 securite. Ne les
remplacer que par une piece portant le numero specifie.
A
J D1
D
[
in this basic schematic
— 18 —
— 17 —
•
When replacing parts shown in the table below,
be sure to perform the safety related adjustment.
D - BOARD
Part Replaced ([)
RV501
Part Replaced (])
RV501, T501, R545, R546, R548,
R550, R547, R549, R552, D517,
IC605, IC901, C540, C542, C544,
C541, C535, IC501, C558, R567,
R564, C555, C553, C554, C561
•
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.
D825TM