Panasonic TC-22LR30 Service Manual ▷ View online
TC-22LR30
LCD TV/DVD-RAM Combination
ORDER NO. ITD0409036C1
B19 Canada:B07
1
SAFETY PRECAUTIONS
3
1.1.
GENERAL GUIDELINES
3
1.2.
LEAKAGE CURRENT COLD CHECK
3
1.3.
LEAKAGE CURRENT HOT CHECK
3
2
LASER PRODUCT
4
2.1.
PRECAUTION OF LASER DIODE
4
3
PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) TO
ELECTROSTATICALLY SENSITIVE (ES) DEVICES
5
4
ABOUT LEAD FREE SOLDER (PbF)
6
5
SERVICE NOTES
7
5.1.
SELF DIAGNOSIS FEATURE FOR TV PORTION
7
5.2.
SELF DIAGNOSIS FOR POWER
9
5.3.
DVD-RAM SELF DIAGNOSIS
10
5.4.
DVD-RAM SERVICE MODE
11
5.5.
SERVICE POSITION
14
5.6.
WIRING (CLAMPERS & LEADS)
16
5.7.
KIND OF LOCATION OF THE FLEXIBLE CABLE AND
CONNECTOR
17
5.8.
HOW TO REMOVE THE CONNECTOR
19
5.9.
CHASSIS BOARD LAYOUT
20
5.10. HOW TO REMOVE A DISC WHEN EJECT FAIL
21
6
HOW TO REPLACE CIRCUIT BOARD ASSEMBLIES
24
6.1.
REPLACEMENT PROCEDURES FOR THE BOARDS IN
THE LCD TV PORTION
24
6.2.
REPLACEMENT PROCEDURES FOR THE BOARDS IN
THE DVD PORTION
34
7
ADJUSTMENT PROCEDURES
49
7.1.
SERVICE FIXTURES AND TOOLS
49
8
SCHEMATIC DIAGRAMS
51
8.1.
INTERCONNECTION SCHEMATIC DIAGRAM
51
9
BLOCK DIAGRAMS
53
10 EXPLODED VIEWS
55
10.1. LCD SECTION (1)
55
10.2. LCD SECTION (2)
56
10.3. MAIN CHASSIS SECTION
57
10.4. DVD SECTION
58
10.5. PACKING PARTS AND ACCESSORIES SECTION
59
11 REPLACEMENT PARTS LISTS
60
11.1. REPLACEMENT NOTES
60
11.2. MECHANICAL REPLACEMENT PARTS LIST
60
11.3. SERVICE FIXTURES AND TOOLS REPLACEMENT
PARTS LIST
61
11.4. ELECTRICAL REPLACEMENT PARTS LIST
61
CONTENTS
Page
Page
2
TC-22LR30
1 SAFETY PRECAUTIONS
1.1. GENERAL GUIDELINES
1. IMPORTANT SAFETY NOTICE
There are special components used in this equipment
which are important for safety. These parts are marked by
which are important for safety. These parts are marked by
in the Schematic Diagrams, Circuit Board Layout,
Exploded Views and Replacement Parts List. It is essential
that
that
these
critical
parts
should
be
replaced
with
manufacturer’s specified parts to prevent shock, fire, or
other hazards. Do not modify the original design without
permission of manufacturer.
other hazards. Do not modify the original design without
permission of manufacturer.
2. An Isolation Transformer should always be used during the
servicing of Combination LCD TV/DVD-RAM whose chassis
is not isolated from the AC power line. Use a transformer of
adequate power rating as this protects the technician from
accidents resulting in personal injury from electrical shocks.
It will also protect Combination LCD TV/DVD-RAM from
being damaged by accidental shorting that may occur
during servicing.
is not isolated from the AC power line. Use a transformer of
adequate power rating as this protects the technician from
accidents resulting in personal injury from electrical shocks.
It will also protect Combination LCD TV/DVD-RAM from
being damaged by accidental shorting that may occur
during servicing.
3. When servicing, observe the original lead dress, especially
the lead dress in the high voltage circuits. If a short circuit is
found, replace all parts which have been overheated or
damaged by the short circuit.
found, replace all parts which have been overheated or
damaged by the short circuit.
4. After servicing, see to it that all the protective devices such
as insulation barriers, insulation papers, shield,
and
isolation R-C combinations are properly installed.
5. When the TV set is not used for a long period of time,
unplug the power cord from the AC outlet.
6. After servicing make the following leakage current checks to
prevent the customer from being exposed to shock
hazards.
hazards.
1.2. LEAKAGE CURRENT COLD
CHECK
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.
2. For physically operated power switches, turn power on.
Otherwise skip step 2.
3. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the receiver, such as screwheads, connectors, etc.
When the exposed metallic part has a return path to the
chassis, the reading should be between 1 M
part on the receiver, such as screwheads, connectors, etc.
When the exposed metallic part has a return path to the
chassis, the reading should be between 1 M
Ω
and 8.5 M
Ω
.
When the exposed metal does not have a return path to the
chassis, the reading must be infinity.
chassis, the reading must be infinity.
1.3. LEAKAGE CURRENT HOT
CHECK
1. Plug the AC cord directly into the AC outlet.
Do not use a isolation transformer for this check.
2. Connect a 1.5 k
Ω
, 10 W resistor, in parallel with a 0.15 µF
capacitor, between each exposed metallic part on the set
and a good earth ground, as shown in Figure 1.
and a good earth ground, as shown in Figure 1.
3. Use an AC voltmeter, with 1 k
Ω
/V or more sensitivity, to
measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the
above measurements.
6. The potential at any point should not exceed 0.75 V RMS.
A leakage current tester (Simpson Model 229 equivalent)
may be used to make the hot checks. Leakage current must
not exceed 1/2 mA. In case a measurement is outside of
the limits specified, there is a possibility of shock hazard,
and the receiver should be repaired and rechecked before
it is returned to the customer.
may be used to make the hot checks. Leakage current must
not exceed 1/2 mA. In case a measurement is outside of
the limits specified, there is a possibility of shock hazard,
and the receiver should be repaired and rechecked before
it is returned to the customer.
Figure 1
3
TC-22LR30
CLASS I LASER PRODUCT
·
This equipment is certified to comply with DHHS Rules 21
CFR Chapter 1, Subchapter J in effect as of date of
manufacture. (Only for U.S.A.)
CFR Chapter 1, Subchapter J in effect as of date of
manufacture. (Only for U.S.A.)
This equipment is classified as a Class I (Class 1) level LASER
Product and there is no hazardous LASER radiation with the
safety protection.
Product and there is no hazardous LASER radiation with the
safety protection.
Caution:
Use
of
controls
or
adjustments
or
performance
of
procedures other than those specified herein may result in
hazardous radiation exposure.
hazardous radiation exposure.
Never touch the internal parts in order to avoid EXPOSURE TO
VISIBLE LASER RADIATION.
VISIBLE LASER RADIATION.
Unplug the AC power cord to the equipment when opening the
top cover.
top cover.
When the power switch is On, do not place your eyes close to
the front panel opening door or the other openings to look into
the interior unit.
the front panel opening door or the other openings to look into
the interior unit.
LASER Specification
Class I level A LASER Product (Class 1 level A LASER
Product)
Product)
Wave Length:
662 nm (at DVD)
785 nm (at CD)
Laser Power:
No hazardous radiation is emitted with
the safety protection.
the safety protection.
2 LASER PRODUCT
2.1. PRECAUTION OF LASER DIODE
4
TC-22LR30
