Circuit Board Location; Printed Wiring Boards And Schematic Diagrams; A Board; Ma Board - Sony TRINITRON KV-27FV16 Service Manual

6.2 CIRCUIT BOARD LOCATIONS
HX Board

CA Board

VA Board

HA Board

D Board

HB Board

A Board

BC Board

K Board

MA Board

P 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 , 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 20).
• When replacing parts shown in the table below, be sure
to perform the related adjustments.
• 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
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.
— 35 —
A BOARD IC BLOCK DIAGRAMS
A BOARD: IC401 TDA7057AQ/2 (KV-32FS12/32FS16 ONLY)
V
P
4
I + i
Input 1
3
+
DC Volume Control 1
1
–
I – i
TEMPERATURE
STABILIZER
V
PROTECTION
REF
I + i
Input 2
5
+
DC Volume Control 2
7
–
I – i
Signal Power
n.c. Ground Ground 1
12
2 6
A BOARD: IC402 TDA8580Q/N1
(ALL EXCEPT 32FS12/32FS16)
V P1
3
7
IN 1
+
60
V/l
-
k
TDA8580Q/N1
8
IN 2
+
60
V/l
V px k -
V px
45
k
30 k
BUFFER
45
k
mark
+
60
V/l
k -
10
IN 3
12
IN 5
+
60
V/l
k -
11
IN 4
13
MUTE
INTERFACE
5
STANDBY
2
PGND1 PGND2
KV-27FV16/29FV16/29FV16C/32FS12/32FS16
13
Positive Output 1
1
11 Negative Output 1
10 Positive Output 2
2
8 Negative Output 2
Power
A BOARD: IC502 TDA8172
Ground 2
9
(ALL EXCEPT 32FS12/32FS16)
V P2
15
45 k
-
1
OA
OUT 1 +
+
A BOARD: IC502 STV9379
+
4
OA OUT 2 -
- (KV-32FS12/32FS16 ONLY)
45 k
OUTPUT
SUPPLY
9
BUFFER VOLTAGE SUPPLY
BUFFER
2
45 k
-
14
OA OUT 3 -
+
INVERTING
1
+ INPUT
17
OA OUT 4 +
-
AMPLIFIER
45 k
NON-INVERTING
7
INPUT
6
DIAGNOSTIC DIAG
16
— 36 —
STAGE FLYBACK
GENERATOR
6 3
FLYBACK
GENERATOR
POWER
5 OUTPUT
THERMAL
PROTECTION
4
GND