Circuit Boards Location; Schematic Diagrams And Printed Wiring Boards - Gateway VX900T Service Manual

VX900T

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 RV904 ([) as indicated. (See page 13)
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.
D1
[
in this basic schematic
— 22 —
•
When replacing parts shown in the table below,
be sure to perform the safety related adjustment.
D - BOARD
Part Replaced ([)
RV904
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.