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KV-27FV16/29FV16/29FV16C/32FS12/32FS16
6-3. PRINTED WIRING BOARDS AND
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 20).
• When replacing parts shown in the table below, be sure
to perform the related adjustments.
6.2 CIRCUIT BOARD LOCATIONS
• All voltages are in Volts
• Voltage is DC with respect to ground unless otherwise
noted.
• Readings are taken with a 10MΩ 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
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.
Note:
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.
— 36 —— 35 —
A BOARD IC BLOCK DIAGRAMS
A BOARD: IC401 TDA7057AQ/2 (KV-32FS12/32FS16 ONLY)
DC Volume Control 1
Input 1
Positive Output 1
Negative Output 1
Power
Ground 1
Signal
Ground
TEMPERATURE
PROTECTION
STABILIZER
REF
V
P
V
I + i
I – i
+
–
4
3
1
+
–
13
11
7
5
DC Volume Control 2
Input 2
I + i
I – i
1
2
Positive Output 2
Negative Output 2
10
8
2 6
12
9
Power
Ground 2n.c.
A BOARD: IC502 TDA8172
(ALL EXCEPT 32FS12/32FS16)
A BOARD: IC402 TDA8580Q/N1
(ALL EXCEPT 32FS12/32FS16)
TDA8580Q/N1
V
P1
3
IN 1
7
V
P2
15
IN 2
8
+
-
+
-
60
k
60
k
V/l
V/l
+
-
OA
+
-
OA
OUT 1 +
OUT 2 -
1
4
45 k
45 k
V
px
30 k
BUFFER
IN 4
IN 5
12
+
-
60
k
60
k
V/l
+
-
OA
+
-
OA
OUT 3 -
OUT 4 +
14
17
45 k
45 k
11
BUFFER
BUFFER
45
k
45
k
V
px
+
-
V/l
MUTE
13
STANDBY
5
DIAG
6
DIAGNOSTIC
INTERFACE
IN 3
10
PGND1
2
PGND2
16
9
A BOARD: IC502 STV9379
(KV-32FS12/32FS16 ONLY)
1
2 3
4
5
6
7
SUPPLY
VOLTAGE
OUTPUT
STAGE
SUPPLY
FLYBACK
GENERATOR
FLYBACK
GENERATOR
POWER
AMPLIFIER
THERMAL
PROTECTION
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
GND
A Board
CA Board
K Board
MA Board
VA Board
HX Board
P Board
D Board
BC Board
HB Board
HA Board