Compaq D-1H User Manual

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P75

5-2. CIRCUIT BOARDS LOCATION

Note:

• All capacitors are in

F unless otherwise noted. pF:

µµ

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.

• All resistors are in ohms.
•

: nonflammable resistor.

•

fusible resistor.

•

∆

: internal component.

•

panel designation and adjustment for repair.

• e :

earth-ground.

• E :

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 RV501 ([) as indicated. (See page 10Z)

• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.

• When replacing parts shown in the table below,
be sure to perform the safety related adjustment.

Part Replaced ([)

RV501

Part Replaced (])

•

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.

Pitch: 5 mm
Rating electrical power 1/4 W (CHIP: 1/10 W)

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.

5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS

D - BOARD

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

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