Circuit Board Location; Printed Wiring Boardsand Schematic Diagrams; A Board; Mb Board - Sony Trinitron KV-24FV12 Service Manual

6.2 CIRCUIT BOARD LOCATIONS

CB Board

VB Board

HZ Board

(KV-25FV12A
MODEL

K Board

A Board

MB Board

6-3. PRINTED WIRING BOARDSAND
SCHEMATIC DIAGRAMS
• All capacitors are in µF unless otherwise noted.
pF: µµF 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.
KΩ = 1000Ω MΩ = 1000KΩ
• : 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 , make the
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 19).
• When replacing parts shown in the table below, be sure
to perform the related adjustments.
Part Replaced ( ) Adjustment (
DY, T505, CRT, IC501, C507,C520, HV HOLD-DOWN
C505, C509, C515, T504,T503, (R564)
C551, L510, C546, C537, C547,
D517, D518, D519, R560,R561,
R562, R563, R565, R566, R567,
R525.....................................A Board
IC1301...............................MB Board
B+ VOLTAGE
IC601, PH601...................A Board
CONFIRMATION
• All voltages are in Volts
• Voltage is DC with respect to ground unless otherwise
noted.
• Readings are taken with a 10MΩ digital multimeter.
ONLY)
• 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
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.
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.
— 31 —
)
A BOARD IC BLOCK DIAGRAMS
A BOARD: IC402 TDA8580Q/N1
7
IN 1
8
IN 2
V px
10
IN 3
12
IN 5
11
IN 4
13
MUTE
5
STANDBY
mark
KV-24FV12/25FV12/25FV12A/25FV12C
V P1
V P2
3
15
45 k
+
60
-
V/l
-
k
OA
+
TDA8580Q/N1
+
+
OA
60
-
V/l
k -
45 k
V px
45
k
30 k
BUFFER BUFFER
45
k
45 k
+
60
-
V/l
k -
OA
+
+
+
OA
60
-
V/l
k
-
45 k
INTERFACE
DIAGNOSTIC
2 16
PGND2
PGND1
A BOARD: IC502 TDA8172
— 32 —
1
OUT 1 +
4
OUT 2 -
9
BUFFER
14
OUT 3 -
17
OUT 4 +
6
DIAG