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5-3. CIRCUIT BOARDS LOCATION
D
A
H2
N
G
US
H
J
5-4. SCHEMATIC DIAGRAMS AND PRINTED
WIRING BOARDS
Note:
• All capacitors are in µF unless otherwise noted. (pF: µµF)
Capacitors without voltage indication are all 50 V.
• 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.
Ï
•
: fusible resistor.
f
•
: 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
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 indicated. (See page 3-1)
• When replacing the part in below table, be sure to perform the
related adjustment.
Note: The components identified by shading and
¡
mark
are critical for safety. Replace only
with part number specified.
Note: Les composants identifiés par un tramé et
¡
une marque
sont critiques pour la
sécurité. Ne les remplacer que par une pièce
portant le numéro spécifié.
• All voltages are in V.
• Readings are taken with a 10 MΩ digital multimeter.
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal production
tolerances.
•
: Can not be measured.
*
• Circled numbers are waveform references.
s
•
: B + bus.
S
•
: B – bus.
• Divided circuit diagram
One sheet of N board circuit diagram is divided into three sheets,
each having the code N-a to N-c. For example, the destination
ab1 on the code N-a sheet is connected to ab1 on the N-b sheet.
a b 1
Ref. No.
Circuit diagram division code
5-9
Part Replaced ([)
HV ADJ
RV901
Part Replaced (])
HV Regulator
D Board C920, IC901, R923
Circuit Check
R924, R929, R945,
RV901, T902(FBT)
• Mounted D Board
HV Protector
D Board C922, C925, C926,
Circuit Check
D912, D914, D915,
D921, Q907, Q908,
R921, R922, R932,
R937, R939, T902(FBT)
• Mounted D Board
Beam Current
D Board C910, C921, C933,
Protector Circuit
D901, D902, D913,
Check
IC503, IC901, R901,
R920, R928, R930,
R931, R940, R941,
T902(FBT)
• Mounted D Board
G Board IC652
• Mounted G Board
N Board IC001, R031, R032
• Mounted N Board
Terminal name of semiconductors in silk screen
printed circuit (
)
*
Circuit
Device
Printed symbol
Terminal name
Collector
Transistor
1
Base
Emitter
Collector
Transistor
2
Base
Emitter
Cathode
3
Diode
Anode
Cathode
4
Diode
Anode
(NC)
Cathode
5
Diode
Anode
(NC)
Common
Diode
6
Anode
Cathode
Common
7
Diode
Anode
Cathode
Common
8
Diode
Anode
Anode
Common
9
Diode
Anode
Anode
Common
0
Diode
Cathode
Cathode
Common
qa
Diode
Cathode
Cathode
Anode
Cathode
Diode
Anode
qs
Anode
Cathode
Anode
Source
Transistor
Drain
qd
(FET)
Gate
D
G
G
Source
Transistor
S
qf
Drain
(FET)
Gate
D
D
Source
Transistor
qg
Drain
G
(FET)
Gate
S
S
Emitter
Collector
qh
Transistor
Base
–
Discrete semiconductot
(Chip semiconductors that are not actually used are included.)
5-10
D
S
G
Ver.1.5
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