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6.2 CIRCUIT BOARD LOCATIONS
HX Board
CA Board
VA Board
HZ Board
D Board
A Board
K Board
MA Board
6-3. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
• All capacitors are in mF unless otherwise noted.
pF: mmF 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.
Part Replaced (
)
Adjustment (
DY, T505, CRT, IC501, C507,
HV HOLD-DOWN
C520, C505, C509, C515, T504,
(R564)
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525........................A Board
IC301.............................MA 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 10MW 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.
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.
—37 —
A BOARD IC BLOCK DIAGRAMS
)
A BOARD: IC402 TDA8580Q/N1
7
IN 1
TDA8580Q/N1
8
IN 2
V px
BUFFER
10
IN 3
12
IN 5
11
IN 4
13
MUTE
5
STANDBY
A BOARD: IC502 TDA8172
V P1
V P2
3
15
45 k
+
60
-
V/l
1
-
k
OA
OUT 1 +
+
+
4
+
OA
OUT 2 -
60
-
V/l
k
-
45 k
V px
45
k
30 k
9
BUFFER
BUFFER
45
k
45 k
+
60
-
V/l
14
k
-
OUT 3 -
OA
+
+
17
+
OUT 4 +
OA
60
-
V/l
k
-
45 k
6
INTERFACE
DIAGNOSTIC
DIAG
2
16
PGND1
PGND2
— 38 —
KV-29FS12A
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