Foldout Notes; Schematics; Schematic Notes; Important Notice - Panasonic CT-2707DF Service Manual

IMPORTANT SAFETY NOTICE
THIS SCHEMATIC DIAGRAM
FEATURES THAT ARE IMPORTANT FOR PROTECTION FROM
X-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS.
WHEN SERVICING IT IS
MANUFACTURERS SPECIFIED PARTS BE USED FOR THE
CRITICAL COMPONENTS DESIGNATED WITH A
SCHEMATIC.
1. Resistors are carbon 1/4W unless noted
otherwise.
2. Capacitors are ceramic 50V unless noted
otherwise.
3. Coil value notes is inductance in H.
4. Test point indicated by ; Test point but no
pin .
5. Components indicated with
parts and replacement should be made
with manufacture specified replacement
parts only.
1. Voltage measurement:
- AC input to the Receiver is 120V.
NTSC (HD, 1125i & 525P when
applicable) signal
connected to the antenna of the
Receiver. (Color bar pattern of 100
IRE white and 7.5 IRE black.)
- All Picture and Audio adjustments are
set to Normalize.
TV ANT/CABLE - (Set-Up Menu) in
TV/ANT Mode
Volume - Min.
TV/Video SW - TV position
Audio Mode - Stereo
3
1. indicates waveform
(Measurement can be taken at the best
accessible location in common to the
indicated point.)
2. Taken with an NTSC signal generator
connected to the antenna
(NTSC color bar pattern of 8 bars of 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".
Values for components noted in schematics are subject to change without
any notice or obligation, so please check parts list for component value or
part number

Schematic Notes

INCORPORATES SPECIAL
ESSENTIAL THAT ONLY
IN THE
SCHEMATIC NOTES
6.
of B+ supply.
7. The schematic diagrams are current at
the time of printing and are subject to
change without notice.
8. Ground
GROUND
are critical indicates COLD GROUND.
NOTE: All other component symbols are
VOLTAGE MEASUREMENTS
- Voltage readings are nominal and
may vary ±10% on active devices.
Some voltage reading will vary
with signal strength and picture
generator is
content.
- Supply voltages are nominal.
2. Ground symbol
connection of meter.
Incorrect ground connection will result
in erroneous readings.
CAUTION: Incorrect ground connection
of the test equipment will result in
erroneous readings.
WAVEFORM MEASUREMENTS
measurement. 4. All video and color waveforms are taken
with a wideband scope and a probe
with low capacitance (10 to 1). Shape
and
depending on the type of Oscilloscope
terminal. used and its settings.
5. Ground symbol
number indicates (Hot) ground lead
connection of the Oscilloscope.
CAUTION: Incorrect ground connection of
the test equipment will result in erroneous
readings.

Important notice:

- 33 -
CHIP TRANSISTOR
LEAD DESIGNATION
B
C
E
(BOLD LINE) indicates the route
symbol indicates HOT
CONNECTION;
used for engineering design
purposes.
indicates ground lead
peak altitudes may vary
shown on waveform