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5-3. CIRCUIT BOARDS LOCATION
5-4. SCHEMATIC DIAGRAMS AND PRINTED
WIRING BOARDS
Note:
All capacitors are in
F unless otherwise noted. (pF:
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 M
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
Part Replaced ([)
HV ADJ
RV901
F)
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
R920, R928, R930,
R931, R940, R941,
• 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 (
*
Device
Printed symbol
Transistor
1
2
Transistor
3
Diode
4
Diode
5
Diode
Diode
6
Diode
7
8
Diode
IC503, IC901, R901,
9
Diode
0
Diode
T902 (FBT)
qa
Diode
Diode
qs
Transistor
qd
(FET)
Transistor
qf
(FET)
Transistor
qg
(FET)
qh
Transistor
–
Discrete semiconductot
(Chip semiconductors that are not actually used are included.)
)
Circuit
Terminal name
Collector
Base
Emitter
Collector
Base
Emitter
Cathode
Anode
Cathode
Anode
(NC)
Cathode
Anode
(NC)
Common
Anode
Cathode
Common
Anode
Cathode
Common
Anode
Anode
Common
Anode
Anode
Common
Cathode
Cathode
Common
Cathode
Cathode
Anode
Cathode
Anode
Anode
Cathode
Anode
Source
Drain
D
D
Gate
G
G
Source
S
S
Drain
Gate
D
D
Source
Drain
G
G
Gate
S
S
Emitter
Collector
Base
Ver.1.6
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