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A
B
1
2
3
4
5
Boards Designation
Voltage Measurements
1.
Voltage measurement:
• A-Board - Main Chassis
-
AC input to the Receiver is 120V.
NTSC (HD, 1125i & 525P when
• C-Board - CRT Drive
applicable) signal generator is
• G-Board - Front Video Input
connected to the antenna of the
Receiver. (Color bar pattern of
• JJ-Board - A/V Amp Interface
100 IRE white and 7.5 IRE black.)
-
All Picture and Audio adjustments
• K-Board - Customer Controls
are set to Normalize.
TV ANT/CABLE - (Set-Up Menu)
• M-Board - DVD-TV CPU Interface
in TV/ANT Mode
• P-Board - DVD Power Supply
Volume - Min.
TV/Video SW - TV position
• W-Board - DVD Unit Interface
Audio Mode - Stereo
C
A-Board Schematic (Right Portion)
Schematic Notes
-
Voltage readings are nominal
1.
Resistors are carbon 1/4W unless
6.
(BOLD LINE) indicates
and may vary ±10% on active
noted otherwise.
the route of B+ supply.
devices.
Some
voltage
2.
Capacitors are ceramic 50V unless
7.
The
schematic
reading will vary with signal
noted otherwise.
current at the time of printing and
Coil value notes is inductance in µH.
strength and picture content.
3.
are subject to change without
-
Supply voltages are nominal.
4.
Test point indicated by
; Test point
notice.
2.
Ground
symbol
indicates
but no pin .
8.
Ground symbol
5.
Components indicated with
are
GROUND CONNECTION;
ground lead connection of meter.
critical parts and replacement should
indicates COLD GROUND.
Incorrect ground connection will
be made with manufacture specified
result in erroneous readings.
NOTE: All other component symbols
replacement parts only.
are used for engineering
CAUTION:
Incorrect
ground
connection of the test equipment
design purposes.
will result in erroneous readings.
D
E
Waveform Measurements
3
1.
indicates waveform measurement.
4.
All video and color waveforms are
(Measurement can be taken at the
taken with a wideband scope and
diagrams
are
best accessible location in common
a probe with low capacitance (10
to the indicated point.)
to 1). Shape and peak altitudes
2.
Taken
with
an
NTSC
signal
may vary depending on the type
generator connected to the antenna
of Oscilloscope used and its
indicates HOT
terminal. (NTSC color bar pattern of
settings.
8 bars of EIA colors, 100 IRE white
5.
Ground symbol
shown on
and 7.5 IRE black.)
waveform number indicates (Hot)
3.
Customer Controls (Picture/Audio
ground lead connection of the
Menu) are set to Normalize. Volume
Oscilloscope.
is set to "MIN".
CAUTION:
Incorrect
ground
connection of the test equipment will
result in erroneous readings.
F
G
Notes:
IMPORTANT SAFETY NOTICE
Check Parts List for most recent
THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES
THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE
component values and part numbers.
AND ELECTRICAL SHOCK HAZARDS.
WHEN SERVICING IT IS
ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE
Obtain
voltages
with
a
digital
USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A
IN
multimeter.
THE SCHEMATIC.
H
A-Board Voltage Measurements
(ICs and Transistors)
IC001
IC101
1
. . . . . . 4.41
33
. . . . . 0.00
1
. . . . . 2.86
27
. . . . . n.c
2
. . . . . . 2.44
34
. . . . . 5.24
2
. . . . . 5.57
28
. . . . . 3.15
3
. . . . . .n.c
35
. . . . . 5.22
3
. . . . . 0.00
29
. . . . . 2.16
4
. . . . . . 3.46
36
. . . . . 0.00
4
. . . . . 0.00
30
. . . . . n.c
5
. . . . . . 5.25
37
. . . . . n.c
5
. . . . . 0.00
31
. . . . . 4.44
6
. . . . . . 5.25
38
. . . . . GND
6
. . . . . 0.00
32
. . . . . n.c
7
. . . . . . 0.97
39
. . . . . 0.15
7
. . . . . 8.87
33
. . . . . 3.01
8
. . . . . . 5.25
40
. . . . . 4.17
8
. . . . . 3.29
34
. . . . . 2.58
9
. . . . . .n.c
41
. . . . . 0.00
9
. . . . . 3.29
35
. . . . . 3.43
10
. . . . . . 5.25
42
. . . . . 0.00
10
. . . . . 3.34
36
. . . . . 3.43
11
. . . . . . 0.14
43
. . . . . 0.00
11
. . . . . 4.27
37
. . . . . 8.87
12
. . . . . GND
44
. . . . . 0.00
12
. . . . . GND
38
. . . . . 3.47
13
. . . . . . 2.63
45
. . . . . 0.15
13
. . . . . 3.67
39
. . . . . 4.42
14
. . . . . . 0.00
46
. . . . . 0.00
14
. . . . . 4.84
40
. . . . . 2.82
15
. . . . . . 0.00
47
. . . . . 0.06
15
. . . . . 4.74
41
. . . . . 4.43
16
. . . . . . 0.00
48
. . . . . n.c
16
. . . . . 0.36
42
. . . . . 4.95
17
. . . . . . 0.00
49
. . . . . n.c
17
. . . . . 3.29
43
. . . . . 4.39
18
. . . . . . 0.44
50
. . . . . 0.07
18
. . . . . 4.92
44
. . . . . GND
19
. . . . . . 0.00
51
. . . . . 5.25
19
. . . . . 2.72
45
. . . . . 0.39
20
. . . . . . 0.00
52
. . . . . 0.04
20
. . . . . 2.72
46
. . . . . 6.12
21
. . . . . . 0.00
53
. . . . . 0.04
21
. . . . . GND
47
. . . . . 4.06
22
. . . . . . 5.26
54
. . . . . **
22
. . . . . 6.96
48
. . . . . 2.17
23
. . . . . . 0.00
55
. . . . . 4.12
23
. . . . . 5.24
49
. . . . . 5.26
24
. . . . . .n.c
56
. . . . . n.c
24
. . . . . 4.03
50
. . . . . 0.88
25
. . . . . . 1.19
57
. . . . . 4.46
25
. . . . . n.c
51
. . . . . 6.28
26
. . . . . . 1.80
58
. . . . . 0.00
26
. . . . . 5.89
52
. . . . . 4.12
27
. . . . . GND
59
. . . . . 4.84
28
. . . . . . 0.00
60
. . . . . 4.86
IC2321
29
. . . . . . 5.22
61
. . . . . 5.25
1
. . . . . 4.38
12
. . . . . 0.10
30
. . . . . . 4.94
62
. . . . . 2.45
2
. . . . . GND
13
. . . . . 5.05
31
. . . . . . 5.19
63
. . . . . 2.36
3
. . . . . 4.43
14
. . . . . 4.45
32
. . . . . . 0.00
64
. . . . . GND
4
. . . . . 4.40
15
. . . . . 4.39
5
. . . . . 4.42
16
. . . . . 4.36
IC002
IC451
6
. . . . . 4.38
17
. . . . . 4.39
1
. . . . . GND
1
. . . . . . 0.00
7
. . . . . 4.47
18
. . . . . 4.39
2
. . . . . GND
2
. . . . . . 4.72
8
. . . . . 5.47
19
. . . . . 4.41
3
. . . . . GND
3
. . . . . . 4.07
9
. . . . . 4.30
20
. . . . . 4.43
4
. . . . . GND
4
. . . . . . 4.12
10
. . . . . 1.43
21
. . . . . 8.86
5
. . . . . 4.85
5
. . . . . . 0.00
11
. . . . . 5.26
22
. . . . . 4.38
6
. . . . . 4.85
6
. . . . . . 4.07
7
. . . . . GND
7
. . . . . . 3.75
IC6501
8
. . . . . 5.26
8
. . . . . 26.80
1
. . . . . GND
15
. . . . . 2.69
9
. . . . . . 2.64
2
. . . . . 4.94
16
. . . . . 3.46
IC551
10
. . . . . .n.c
3
. . . . . GND
17
. . . . . 3.46
11
. . . . . .GND
1
. . . . 14.05
4
. . . . . GND
18
. . . . . 2.37
12
. . . . . 15.27
2
. . . . . GND
5
. . . . . GND
19
. . . . . GND
13
. . . . . 27.60
3
. . . . . 8.90
6
. . . . . n.c
20
. . . . . 2.47
7
. . . . . 0.00
21
. . . . . 1.47
IC801
IC552
8
. . . . . 4.42
22
. . . . . 0.43
. . . . . 0.58
9
. . . . . 4.86
23
. . . . . 9.96
1
1
. . . . . 8.34
. . . . . 0.00
10
. . . . . 4.84
24
. . . . . 0.39
2
. . . . . GND
2
. . . . . 0.00
11
. . . . . GND
25
. . . . . 1.17
3
. . . . . 4.97
3
12
. . . . . 2.44
26
. . . . . 1.17
4
. . . . 13.18
13
. . . . . GND
27
. . . . . 3.61
IC2201
14
. . . . . 2.28
28
. . . . . 0.58
IC803
1
. . . . . 1.25
2
. . . . . 2.18
IC2302
1
. . . . . 88.00
3
. . . . . 2.18
2
. . . . 130.10
1
. . . . . 6.15
4
. . . . . 2.27
3
. . . . 300.60
2
. . . . . 6.80
5
. . . . . 2.24
4
. . . . 130.00
3
. . . . . 0.21
6
. . . . . 0.29
5
. . . . 130.00
4
. . . . . 6.19
7
. . . . . 4.95
5
. . . . . 6.80
8
. . . . . 2.43
9
. . . . . 2.46
6
. . . . 18.39
7
. . . . 11.16
10
. . . . . 0.40
8
. . . . 11.36
11
. . . . . 2.24
9
. . . . . 0.00
12
. . . . . 3.22
10
. . . . 24.10
13
. . . . . 3.38
11
. . . . 11.19
14
. . . . . 2.18
12
. . . . 10.90
15
. . . . . 3.39
16
. . . . . 3.48
17
. . . . . GND
18
. . . . . 5.27
** Probing pin may
19
. . . . . 0.24
cause television shut
20
. . . . . n.c
21
. . . . . 2.25
down or blanking the
22
. . . . . 2.20
CRT.
23
. . . . . 2.18
24
. . . . . 2.18
Q001
Q002
Q003
Q004
Q302
Q303
B
0.75
5.90
5.02
5.25
2.70
1.21
C
0.12
10.14
5.82
GND
4.96
GND
E
GND
5.25
5.90
5.23
2.09
1.89
Q304
Q430
Q451
Q452
Q501
Q551
B
3.00
0.24
0.63
0.00
0.00
-0.04
C
8.87
3.73
0.01
3.67
90.30
-32.80
E
2.37
GND
GND
GND
GND
GND
Q2302
Q2303
Q2362
Q801
Q802
Q804
B
129.40
130.10
130.20
24.10
0.06
8.35
C
GND
24.10
0.10
130.00
130.30
0.54
E
18.34
GND
8.33
130.00
130.10
130.60
Q2363
Q2409
Q2410
Q6501
Q6502
Q6503
B
0.10
0.10
0.09
3.29
3.38
2.45
C
0.21
0.00
0.00
4.96
4.82
2.67
E
GND
GND
GND
2.62
2.71
1.82
Q6504
Q6505
Q6506
Q6507
Q6509
Q6510
B
3.28
2.38
2.23
2.67
2.22
0.44
C
4.96
4.96
3.39
4.96
4.96
GND
E
2.63
1.75
1.61
2.03
2.00
1.11
Q6516
Q6517
Q6519
B
1.79
1.47
1.75
C
GND
4.96
3.31
E
2.37
1.74
1.11
CHIP TRANSISTOR
LEAD DESIGNATION
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