Read Sony GDM-17E21 Service Manual online
GDM-17SE2T
– 20 –
5-2. CIRCUIT BOARDS LOCATION
5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 V or less are not indicated except for electrolytic.
• 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.
•
F
: fusible resistor.
•
¢
: 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 14)
• When replacing the part in below table, be sure to perform the
related adjustment.
HV Regulator
Circuit
Circuit
HV Hold-Down
Circuit
Circuit
Beam Current
Protector Circuit
Protector Circuit
Part replaced (
]
)
D board
IC401, IC403, RV401,
FBT (T404),
FBT (T404),
D425,
D423, R460, R461,
R462, R493
• Mounted D board
R462, R493
• Mounted D board
D board
IC401, D439, D442,
D443, D444, R422,
R435, R448, R490
• Mounted D board
D443, D444, R422,
R435, R448, R490
• Mounted D board
D board
IC401, D429, D445,
R435, R470, R472,
R487, R497, R501,
R503, R508
• Mounted D board
R435, R470, R472,
R487, R497, R501,
R503, R508
• Mounted D board
HV ADJ
Part replaced (
[
)
RV401
• All voltages are in V.
• Readings are taken with a 10 M
Ω
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.
A
D
N
Note: The components identified by shading and mark
¡
are critical for safety. Replace only with part
number specified.
Note: Les composants identifiés per un tramé et une
marque
¡
sont critiques pour la sécurité. Ne les
remplacer que par une pièce portant le numéro
spécifié.
spécifié.
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