P780
— 22 —
— 21 —
— 20 —
— 19 —
5-1. BLOCK DIAGRAM
5-2. CIRCUIT BOARDS LOCATION
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.
•
All resistors are in ohms.
•
f
:
nonflammable resistor.
•
:
fusible resistor.
•
∆
:
internal component.
•
p
:
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 12)
•
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.
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
SECTION 5
DIAGRAMS
Part Replaced ( )
RV501
HV ADJ
Part Replaced ( )
D board
T501, IC501, RV501, R540,
R541, R542, R544, R564, R567,
R568, C532, C534, C539, C553,
C554, C555, C556, C558, C561
HV Regulator
Circuit
D board
T501, R510, R543, R547, R549,
R552, R595, D515, D517, C540,
C542, C544, IC607, IC901
HV HOLD
DOWN Circuit
D board
T501, R545, R546, R548, R550,
R596, R934, C535, C541,
IC605, IC607, IC901
Beam Current
Protector Circuit
•
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.
FOLDOUT 1
8/6/99, 8:44 AM
1
Summary of Contents for P780 - 17" CRT Display
Page 16: ... 16 P780 NOTES ...
Page 17: ... 17 P780 NOTES ...
Page 18: ... 18 P780 NOTES ...
Page 24: ...NOTES 36 P780 ...
Page 34: ...NOTES 46 ...
Page 35: ......
Page 36: ...9 978 857 01 English 99HT74018 1 Printed in U S A 1999 08 ...
