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A
B
1
2
3
4
5
CHIP TRANSISTOR
LEAD DESIGNATION
C
A-Board Schematic (Right Portion)
N
Voltage Measurements
ote:
1. Voltage measurement:
Obtain Voltages using a
-
AC input to the Receiver is 120V.
NTSC (HD, 1125i & 525P when
digital multimeter.
applicable) signal generator is
connected to the antenna of the
Receiver. (Color bar pattern of
100 IRE white and 7.5 IRE black.)
2. Ground symbol
-
All Picture and Audio adjustments
Boards Designation
are set to Normalize.
TV ANT/CABLE - (Set-Up Menu)
• A-Board - Main Chassis
in TV/ANT Mode
Volume - Min
• C-Board - CRT Drive
TV/Video SW - TV position
Audio Mode - Stereo
D
E
Schematic Notes
-
Voltage readings are nominal
1. Resistors are carbon 1/4W unless
6.
(BOLD LINE) indicates the
and may vary ±10% on active
noted otherwise.
route of B+ supply.
devices.
Some
voltage
2. Capacitors are ceramic 50V unless
7. The schematic diagrams are current
reading will vary with signal
noted otherwise.
at the time of printing and are
strength and picture content.
3. Coil value notes is inductance in H.
subject to change without notice.
-
Supply voltages are nominal.
4. Test point indicated by
; Test point but
8. Ground symbol
indicates HOT
no pin .
GROUND CONNECTION;
indicates ground
5. Components indicated with
are
indicates COLD GROUND.
lead connection of meter.
critical parts and replacement should
Incorrect ground connection will
NOTE: All other component symbols
be made with manufacture specified
result in erroneous readings.
are used for engineering
replacement parts only.
CAUTION:
Incorrect
ground
design purposes.
connection of the test equipment
will result in erroneous readings.
IMPORTANT SAFETY NOTICE
THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES
THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE
AND ELECTRICAL SHOCK HAZARDS.
WHEN SERVICING IT IS
ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE
USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A
THE SCHEMATIC.
F
G
Waveform Measurements
3
1.
indicates waveform measurement.
5. Ground
symbol
shown
on
(Measurement can be taken at the
waveform number indicates (Hot)
best accessible location in common
ground lead connection of the
to the indicated point.)
Oscilloscope.
2. Taken with an NTSC signal generator
CAUTION:
Incorrect
ground
connected to the antenna terminal.
connection of the test equipment will
(NTSC color bar pattern of 8 bars of
result in erroneous readings.
EIA colors, 100 IRE white and 7.5
IRE black.)
3. Customer
Controls
(Picture/Audio
Menu) are set to Normalize. Volume
is set to "MIN".
4. All video and color waveforms are
taken with a wideband scope and a
probe with low capacitance (10 to 1).
Shape and peak altitudes may vary
depending
on
the
type
of
Oscilloscope used and its settings.
IN
H
A-Board Voltage Measurements
(ICs and Transistors)
IC001
IC002
1
. . . . . . 0.00
22
. . . . . .2.06
1
. . . . . GND
2
. . . . . . 4.70
23
. . . . . .2.41
2
. . . . . GND
3
. . . . . . 4.62
24
. . . . . .1.36
3
. . . . . GND
4
. . . . . . 1.80
25
. . . . . .1.34
4
. . . . . GND
5
. . . . . . n.c
26
. . . . . .2.40
5
. . . . . 3.84
6
. . . . . . 3.27
27
. . . . . .2.89
6
. . . . . 3.85
7
. . . . . . 1.66
28
. . . . . GND
7
. . . . . GND
8
. . . . . . 3.27
29
. . . . . .0.07
8
. . . . . 4.84
9
. . . . . . 0.00
30
. . . . . .0.10
10
. . . . . . 3.27
31
. . . . . .0.10
IC005
11
. . . . . . 0.00
32
. . . . . .0.11
1
. . . . . 4.89
12
. . . . . . 3.27
33
. . . . . .0.06
2
. . . . . GND
13
. . . . . . 1.00
34
. . . . . .3.27
3
. . . . . n.c
14
. . . . . . 0.10
35
. . . . . .3.68
4
. . . . . 3.28
15
. . . . . . 0.10
36
. . . . . .n.c
5
. . . . . GND
16
. . . . . . n.c
37
. . . . . .3.90
6
. . . . . 4.89
17
. . . . . . 0.07
38
. . . . . .3.90
18
. . . . . . 3.18
39
. . . . . .3.27
IC006
19
. . . . . . 0.08
40
. . . . . .1.67
20
. . . . . . 3.27
41
. . . . . .1.68
1
. . . . . n.c
21
. . . . . . 1.54
42
. . . . . GND
2
. . . . . GND
3
. . . . . GND
IC101
4
. . . . . 3.27
5
. . . . . 3.27
1
. . . . . . n.c
29
. . . . . .3.86
2
. . . . . . GND
30
. . . . . .n.c
IC451
3
. . . . . . 3.38
31
. . . . . GND
4
. . . . . . 3.36
32
. . . . . .n.c
1
. . . . . GND
5
. . . . . . 3.36
33
. . . . . .3.93
2
. . . . 10.33
6
. . . . . . 0.00
34
. . . . . .1.04
3
. . . . 22.34
7
. . . . . . 6.16
35
. . . . . .1.76
4
. . . . . 2.27
8
. . . . . . 5.20
36
. . . . . .n.c
5
. . . . . 2.26
9
. . . . . . 5.22
37
. . . . . .9.58
6
. . . . 26.48
10
. . . . . . GND
38
. . . . . .3.10
7
. . . . . 2.57
11
. . . . . . 5.79
39
. . . . . .6.84
12
. . . . . . n.c
40
. . . . . .8.13
IC551
13
. . . . . . 2.42
41
. . . . . .6.56
1
. . . . 13.70
14
. . . . . . 2.40
42
. . . . . .4.85
2
. . . . . GND
15
. . . . . . 2.39
43
. . . . . .1.15
3
. . . . . 8.98
16
. . . . . . 8.92
44
. . . . . GND
17
. . . . . . 4.81
45
. . . . . .1.17
IC552
18
. . . . . . 4.66
46
. . . . . .1.42
19
. . . . . . 4.57
47
. . . . . .n.c
1
. . . . . 8.59
20
. . . . . . 2.89
48
. . . . . .n.c
2
. . . . . GND
21
. . . . . . n.c
49
. . . . . .3.83
3
. . . . . 4.98
22
. . . . . . n.c
50
. . . . . .3.29
23
. . . . . . n.c
51
. . . . . .4.86
IC803
24
. . . . . . 0.63
52
. . . . . .2.95
25
. . . . . . 5.20
53
. . . . . .2.98
1
. . . . 67.50
26
. . . . . . 1.97
54
. . . . . .3.72
2
. . . 112.50
27
. . . . . . 4.36
55
. . . . . .3.06
3
. . . 312.90
28
. . . . . . 6.08
56
. . . . . .n.c
4
. . . 112.27
5
. . . 130.00
IC3001
IC2201
1
. . . . . . 8.92
19
. . . . . GND
1
. . . . . n.c
2
. . . . . . 3.91
20
. . . . . GND
3
. . . . . . 4.63
21
. . . . . .4.15
2
. . . . . n.c
4
. . . . . . n.c
22
. . . . . .n.c
3
. . . . . n.c
5
. . . . . . 4.63
23
. . . . . .n.c
4
. . . . . 2.32
6
. . . . . . 3.58
24
. . . . . .n.c
5
. . . . . 2.18
6
. . . . . 0.28
7
. . . . . . 3.59
25
. . . . . .n.c
7
. . . . . 4.85
8
. . . . . . 4.64
26
. . . . . .3.36
9
. . . . . . 4.64
27
. . . . . .3.38
8
. . . . . 2.38
10
. . . . . . 4.63
28
. . . . . .4.01
9
. . . . . 2.40
11
. . . . . . 3.58
29
. . . . . .4.02
10
. . . . . 0.39
12
. . . . . . 3.58
30
. . . . . .4.01
11
. . . . . 2.22
13
. . . . . . 4.64
31
. . . . . .3.77
12
. . . . . 3.15
13
. . . . . 3.24
14
. . . . . . n.c
32
. . . . . .4.00
15
. . . . . . 4.63
33
. . . . . .4.63
14
. . . . . 2.18
16
. . . . . . n.c
34
. . . . . .4.64
15
. . . . . 3.28
17
. . . . . . 4.73
35
. . . . . .4.63
16
. . . . . 3.41
18
. . . . . . n.c
36
. . . . . .3.98
17
. . . . . GND
18
. . . . . 3.98
IC2302
19
. . . . . 4.00
IC801
20
. . . . . n.c
1
. . . . . .6.03
. . . . 0.62
21
. . . . . 2.20
1
2
. . . . . .6.73
22
. . . . . 2.18
. . . . 0.00
3
. . . . . .0.10
2
23
. . . . . n.c
3
. . . . 0.00
4
. . . . . .6.05
24
. . . . . n.c
4
. . . 12.27
5
. . . . . .6.74
6
. . . . .18.31
IC2351
7
. . . . .10.99
IC003
1
. . . . . 4.40
8
. . . . .11.24
1
. . . 154.76
9
. . . . . GND
2
. . . . . GND
2
. . . 150.14
10
. . . . .21.28
3
. . . . . 4.44
3
. . . 152.77
11
. . . . .11.35
4
. . . . . 4.43
12
. . . . .11.11
5
. . . . . 4.40
6
. . . . . 4.41
7
. . . . . 4.50
IC6501
8
. . . . . 5.50
1
. . . . . . GND
15
. . . . . .2.63
9
. . . . . 4.41
2
. . . . . . 4.82
16
. . . . . .3.39
10
. . . . . 1.46
3
. . . . . . GND
17
. . . . . .3.39
11
. . . . . 4.73
4
. . . . . . GND
18
. . . . . .2.25
12
. . . . . 4.77
5
. . . . . . GND
19
. . . . . GND
13
. . . . . 5.47
6
. . . . . . n.c
20
. . . . . .n.c
14
. . . . . 4.45
7
. . . . . . n.c
21
. . . . . .1.43
15
. . . . . 4.41
8
. . . . . . 4.80
22
. . . . . .0.40
16
. . . . . 4.39
9
. . . . . . 4.70
23
. . . . . .4.86
17
. . . . . 4.41
10
. . . . . . n.c
24
. . . . . .0.38
18
. . . . . 4.43
11
. . . . . . GND
25
. . . . . .1.15
19
. . . . . 4.44
12
. . . . . . 2.36
26
. . . . . .1.13
20
. . . . . 4.44
13
. . . . . . GND
27
. . . . . .3.52
21
. . . . . 8.92
14
. . . . . . 2.28
28
. . . . . .0.56
22
. . . . . 4.40
Q001
Q002
Q003
Q004
Q005
Q201
B
0.71
5.58
0.10
10.20
0.63
3.37
C
0.13
6.51
10.28
12.26
0.30
4.87
E
GND
4.87
GND
9.51
GND
2.72
Q302
Q303
Q401
Q402
Q509
Q501
B
3.34
3.35
3.46
0.62
0.00
3.24
C
4.92
4.92
5.48
3.46
81.08
4.81
E
2.72
2.73
2.80
GND
GND
2.56
Q515
Q551
Q603
Q801
Q802
Q804
B
0.00
0.01
1.01
110.40
118.60
129.90
C
2.92
50.39
4.87
130.00
112.70
0.53
E
GND
0.98
GND
114.80
116.90
130.33
Q2302
Q2303
Q2342
Q2343
Q2344
Q2409
B
21.25
0.08
12.33
0.10
0.60
0.10
C
GND
21.27
0.05
0.10
21.26
0.00
E
16.31
GND
12.37
GND
GND
GND
Q2410
Q6501
Q6502
Q6504
Q6505
Q6506
B
0.10
3.26
4.02
3.23
2.28
2.20
C
0.00
4.86
4.86
4.86
4.79
3.99
E
GND
2.60
3.35
2.59
1.60
1.60
Q6509
Q6510
Q6514
Q6516
Q6517
Q6519
B
2.19
0.42
0.38
1.64
1.43
1.70
C
4.86
GND
GND
GND
4.86
3.29
E
1.56
1.08
1.05
2.26
1.64
0.00
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