Read Sony GDM-20SE2T5 (serv.man2) Service Manual online
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GDM-20SE2T5
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5-3. CIRCUIT BOARDS LOCATION
5-4. 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.
• 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.
• When replacing components identified by
]
, make the
necessary adjustments indicated. (See page 14)
• When replacing the part in below table, be sure to perfome the
related adjustment.
Reference information
RESISTOR
: RN
METAL FILM
: RC
SOLID
: FPRD
NONFLAMMABLE CARBON
: FUSE
NONFLAMMABLE FUSIBLE
: RW
NONFLAMMABLE WIREWOUND
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE CEMENT
COIL
: LF-8L
MICRO INDUCTOR
CAPACITOR
: TA
TANTALUM
: PS
STYROL
: PP
POLYPROPYLENE
: PT
MYLAR
: MPS
METALIZED POLYESTER
: MPP
METALIZED POLYPROPYLENE
: ALB
BIPOLAR
: ALT
HIGH TEMPERATURE
: ALR
HIGH RIPPLE
Note: The components identified by shading and mark
¡
are critical for safety. Replace only with part
number specified.
HV Regulator
Circuit Check
Circuit Check
HV Hold-Down
Circuit Check
Circuit Check
Beam Current
Protector Circuit
Check-1
Protector Circuit
Check-1
Beam Current
Protector Circuit
Check-2
Protector Circuit
Check-2
Voltage of 3rd
winding of FBT
winding of FBT
Part replaced (
]
)
G board
IC901
• Mounted G board
• Mounted G board
G board
D935
• Mounted G board
• Mounted G board
G board
IC901, D933, D934, R907, R908,
R909, R910
• Mounted G board
R909, R910
• Mounted G board
G board
R973, R974
• Mounted G board
• Mounted G board
G board
T902 (FBT)
• Mounted G board
• Mounted G board
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