P780
— 22 —— 21 —— 20 —— 19 —
5-1. BLOCK DIAGRAM
5-2. CIRCUIT BOARDS LOCATION
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.
•
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 AM1
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