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A
B
1
2
3
Waveforms - A-Board
3.58MHz X'tal
1
2.0V p-p [20µs]
IC101 PIN 1
1.7V p-p [20µs]
5
9
4
3.58VCO
IC101 PIN 33 (DET OUT)
IC101 PIN 41 (SYNC)
OSC
0.9V p-p [20µs]
4.7V p-p [20µs]
4.2V p-p [5ms]
2
6
10
TP12
A14 PIN 2 (R)
IC101 PIN 52 (VERT OUT)
TP47R
1.9V p-p [20µs]
3.8V p-p [20µs]
1.7V p-p [5ms]
3
7
11
IC101 PIN 39 (Y IN)
A14 PIN 3 (G)
IC451 PIN 7 (DRIVE)
TP47G
0.4V p-p [20µs]
4.2V p-p [20µs]
54.4V p-p [5ms]
4
8
12
IC101 PIN 43 (C IN)
A14 PIN 4 (B)
IC451 PIN 12 (VERT OUT)
TP47B
5
C
A-Board Layout
TNPH0353
30.8V p-p [5ms]
7.4V p-p [20µs]
324.0V p-p [5µs]
13
17
21
IC451 PIN 13
IC803 PIN 2
IC101 PIN 16 (H SYNC)
NOT
APPLICABLE
174.0V p-p [20µs]
324.0V p-p [5µs]
14
18
22
Q501 Collector (H DRIVE)
Q802 Collector
503KHz X'tal
IC101 PIN 48
256.0V p-p [20µs]
15
19
H OSC
T551 PIN 1
OSC
3.4V p-p [20µs]
24.8 p-p [20µs]
16
20
IC101 PIN 50 (H OUT)
T551 PIN 6
D
E
G-Board Layout
TNPA1736
G-Board Schematic
Notes:
The
above
boards
have
been
modified to enhance and display
traces otherwise hidden by a mask.
Check Parts List for most recent
component values and part numbers.
Obtain
voltages
with
a
digital
multimeter.
Boards Designation
• A-Board - Main Chassis
• C-Board - CRT Drive
• G-Board - Front Video Input
• JJ-Board - A/V Amp Interface
• K-Board - Customer Controls
• M-Board - DVD-TV CPU Interface
• P-Board - DVD Power Supply
• W-Board - DVD Unit Interface
Waveform Measurements
3
1.
Voltage measurement:
1.
indicates waveform measurement.
4.
All video and color waveforms are
(Measurement can be taken at the
taken with a wideband scope and
-
AC input to the Receiver is 120V.
NTSC (HD, 1125i & 525P when
best accessible location in common
a probe with low capacitance (10
applicable) signal generator is
to the indicated point.)
to 1). Shape and peak altitudes
connected to the antenna of the
2.
Taken
with
an
NTSC
signal
may vary depending on the type
generator connected to the antenna
of Oscilloscope used and its
Receiver. (Color bar pattern of
terminal. (NTSC color bar pattern of
settings.
100 IRE white and 7.5 IRE black.)
8 bars of EIA colors, 100 IRE white
5.
Ground symbol
shown on
-
All Picture and Audio adjustments
are set to Normalize.
and 7.5 IRE black.)
waveform number indicates (Hot)
TV ANT/CABLE - (Set-Up Menu)
3.
Customer Controls (Picture/Audio
ground lead connection of the
in TV/ANT Mode
Menu) are set to Normalize. Volume
Oscilloscope.
is set to "MIN".
Volume - Min.
CAUTION:
Incorrect
ground
TV/Video SW - TV position
connection of the test equipment will
Audio Mode - Stereo
result in erroneous readings.
1.
Resistors are carbon 1/4W unless
noted otherwise.
2.
Capacitors are ceramic 50V unless
noted otherwise.
Coil value notes is inductance in µH.
3.
IMPORTANT SAFETY NOTICE
4.
Test point indicated by
THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES
but no pin .
THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE
5.
Components indicated with
AND ELECTRICAL SHOCK HAZARDS.
WHEN SERVICING IT IS
critical parts and replacement should
ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE
be made with manufacture specified
USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A
IN
replacement parts only.
THE SCHEMATIC.
F
G
C-Board Schematic
C-Board Voltages
Q351
B
3.26
C
170.00
E
3.00
Voltage Measurements
-
Voltage readings are nominal
and may vary ±10% on active
devices.
Some
voltage
reading will vary with signal
strength and picture content.
-
Supply voltages are nominal.
2.
Ground
symbol
indicates
ground lead connection of meter.
Incorrect ground connection will
result in erroneous readings.
CAUTION:
Incorrect
ground
connection of the test equipment
will result in erroneous readings.
Schematic Notes
6.
(BOLD LINE) indicates
the route of B+ supply.
7.
The
schematic
diagrams
are
current at the time of printing and
are subject to change without
; Test point
notice.
8.
Ground symbol
indicates HOT
are
GROUND CONNECTION;
indicates COLD GROUND.
NOTE: All other component symbols
are used for engineering
design purposes.
H
C-Board Layout
TNP2AA047
Q352
Q353
3.26
3.32
169.10
165.70
2.95
3.02
CHIP TRANSISTOR
LEAD DESIGNATION
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