Diagrams; Block Diagram; Circuit Board Location - Sony TRINITRON KV-20M42 Service Manual

SECTION 6

DIAGRAMS

6.1 BLOCK DIAGRAM

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855 Block Diagram.p65 1
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3/31/99, 6:44 PM
6.2 CIRCUIT BOARD LOCATIONS
C Board
A Board
6-3. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
• All capacitors are in F unless otherwise noted.
pF: F 50 WV or less are not indicated except for
electrolytic and tantalums.
• All electrolytics are 50V unless otherwise specified.
• Indication of resistance, which does not have one for
rating electrical power, is as follows:
Pitch: 5mm
Rating electrical power 1/4W (CHIP: 1/10W)
• All resistors are in ohms.
K = 1000 M = 1000K
• : nonflammable resistor
• : fusible resistor
• : internal component
• : panel designation and adjustment for repair
• : earth-ground
• : earth-chassis
• All variable and adjustable resistors have characteristic
curve B, unless otherwise noted.
• The components identified by in this manual 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
necessary adjustments indicated. If results do not meet
the specified value, change the component identified
by and repeat the adjustment until the specified value
is achieved (refer to Safety Related Adjustments on
page 17).
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KV-20M42/20S42/20S43/21MB42C/21MB42M/21MB42P/21ME42/21ME42C/
21SB42C/21SB42M/21SE42/21SE42C/21SE82/21SE82C
• When replacing parts shown in the table below, be sure to
perform the related adjustments.
Part Replaced ( ) Adjustment ( )
DY, C511, C574, C575, D572, D573, HV HOLD-DOWN
D574, R582, R583, R584, R585, (R582)
R586, R578, R625, R626, R634,
R635, T504, IC301, IC521, IC602
IC001, IC602, R030, R626, B+ VOLTAGE
R632, R633, R635, R636, R637, CONFIRMATION
R638, R639
• All voltages are in Volts
• Voltage is DC with respect to ground unless otherwise
noted.
• Readings are taken with a 10M digital multimeter.
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal production
tolerance.
• Circled numbers are waveform references.
• * : cannot be measured
• : B + Line
-----
• : B Line
• : Signal path
Reference Information
RESISTOR : RN METAL FILM
: RC SOLID
: FPRD NON FLAMMABLE CARBON
: FUSE NON FLAMMABLE FUSIBLE
: RW NON FLAMMABLE WIREWOUND
: RS NON FLAMMABLE METAL OXIDE
: RB NON FLAMMABLE CEMENT
: ADJUSTMENT RESISTOR
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 the part
number specified.
The symbol (displayed on component side of the
circuit board) indicates fast operating fuse. Replace
only with fuse of the same rating as marked.
, make the
Les composants identifiés per un tramé et une marque
sont critiques pour la sécurité. Ne les remplacer que
par une piéce portant le numéro spécifié.
Le symbole indique une fusible a action rapide.
Doit etre remplacee par une fusible de meme yaleur,
comme marque.
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