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Color TV with Built-In VCR/DVD Player 20MC4306/37
Service
Service
Service
Service Manual
Contents Survey of versions:
Chapter /37 NTSC CLASS 1 LASER PRODUCT
KLASSE 1 LASER PRODUKT
Sec. 1: Adjustment Procedures
Schematic Diagrams and CBA's KLASS 1 LASER APPARAT
Exploded Views CLASSE 1 PRODUIT LASER
Mechanical and Electrical Parts Lists
Sec. 2: Standard Maintenance
Mechanism Alignment Procedures
Disassembly / Assembly of Mechanism
Deck Exploded Views
Deck Parts List
c Copyright 2006 Philips Consumer Electronics B.V. Eindhoven, The Netherlands.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval
system or transmitted, in any form or by any means, electronic, mechanical, photocopying,
or otherwise without the prior permission of Philips.
Published by FU-KC 0613 Service AV Systems Printed in The Netherlands Subject to modification EN 3139 785 31840
MAIN SECTION
Color TV with Built-In
VCR/DVD Player
Sec. 1: Main Section
I Adjustment Procedures
I Schematic Diagrams and CBA's
I Exploded Views
I Mechanical and Electrical Parts List
TABLE OF CONTENTS
LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1
IMPORTANT SAFETY PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2-1
STANDARD NOTES FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1
PREPARATION FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1
OPERATING CONTROLS AND FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1
ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1
HOW TO INITIALIZE THE TV/DVD/VCR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1
FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1
SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1
WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1
WIRING DIAGRAM < TV/VCR SECTION >. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1
WIRING DIAGRAM < DVD SECTION >. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-2
SYSTEM CONTROL TIMING CHARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1
IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1
LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16-1
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17-1
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18-1
MECHANICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19-1
Manufactured under license from Dolby Laboratories.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories.
LASER BEAM SAFETY PRECAUTIONS
This DVD player uses a pickup that emits a laser beam.
Do not look directly at the laser beam coming
from the pickup or allow it to strike against your
skin.
The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep
your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser
beam.
CAUTION: Use of controls and adjustments, or doing procedures other than those specified herein, may result in
hazardous radiation exposure.
Drive Mechanism
Assembly
Laser Beam Radiation
Laser Pickup
Turntable
CAUTION
LASER RADIATION
WHEN OPEN. DO NOT
STARE INTO BEAM.
Location: Top of DVD mechanism.
1-1-1 E7NLSP
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical
codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally
important to implement the following precautions when a set is being serviced.
Safety Precautions for TV Circuit Leakage Current for Appliances and
Underwriters Laboratories (UL) 1410, (50.7).
1. Before returning an instrument to the With the instrument AC switch first in the on
customer, always make a safety check of the position and then in the off position, measure
entire instrument, including, but not limited to, the from a known earth ground (metal water pipe,
following items: conduit, etc.) to all exposed metal parts of the
a. Be sure that no built-in protective devices are instrument (antennas, handle brackets, metal
defective and have been defeated during cabinet, screw heads, metallic overlays, control
servicing. (1) Protective shields are provided shafts, etc.), especially any exposed metal
on this chassis to protect both the technician parts that offer an electrical return path to the
and the customer. Correctly replace all missing chassis. Any current measured must not
protective shields, including any removed for exceed 0.5 milli-ampere. Reverse the
servicing convenience. (2) When reinstalling instrument power cord plug in the outlet and
the chassis and/or other assembly in the repeat the test.
cabinet, be sure to put back in place all
protective devices, including but not limited to,
READING SHOULD
nonmetallic control knobs, insulating
NOT BE ABOVE 0.5 mA
fishpapers, adjustment and compartment
covers/shields, and isolation resistor/capacitor LEAKAGE
networks. Do not operate this instrument or DEVICE CURRENT
permit it to be operated without all BEING TESTER
protective devices correctly installed and TESTED + _
functioning. Servicers who defeat safety TEST ALL EXPOSED
features or fail to perform safety checks METAL SURFACES
may be liable for any resulting damage.
b. Be sure that there are no cabinet openings
through which an adult or child might be able to
insert their fingers and contact a hazardous ALSO TEST WITH
voltage. Such openings include, but are not PLUG REVERSED
limited to, (1) spacing between the picture tube USING AC
ADAPTER PLUG EARTH
and the cabinet mask, (2) excessively wide
AS REQUIRED GROUND
cabinet ventilation slots, and (3) an improperly
fitted and/or incorrectly secured cabinet back
cover. ANY MEASUREMENTS NOT WITHIN THE
LIMITS SPECIFIED HEREIN INDICATE A
c. Antenna Cold Check - With the instrument AC
POTENTIAL SHOCK HAZARD THAT MUST
plug removed from any AC source, connect an
BE ELIMINATED BEFORE RETURNING THE
electrical jumper across the two AC plug
INSTRUMENT TO THE CUSTOMER OR
prongs. Place the instrument AC switch in the
BEFORE CONNECTING THE ANTENNA OR
on position. Connect one lead of an ohmmeter
ACCESSORIES.
to the AC plug prongs tied together and touch
the other ohmmeter lead in turn to each tuner e. X-Radiation and High Voltage Limits -
antenna input exposed terminal screw and, if Because the picture tube is the primary
applicable, to the coaxial connector. If the potential source of X-radiation in solid-state TV
measured resistance is less than 1.0 megohm receivers, it is specially constructed to prohibit
or greater than 5.2 megohm, an abnormality X-radiation emissions. For continued X-
exists that must be corrected before the radiation protection, the replacement picture
instrument is returned to the customer. Repeat tube must be the same type as the original.
this test with the instrument AC switch in the off Also, because the picture tube shields and
position. mounting hardware perform an X-radiation
protection function, they must be correctly in
d. Leakage Current Hot Check - With the
place. High voltage must be measured each
instrument completely reassembled, plug the
time servicing is performed that involves B+,
AC line cord directly into a 120 V AC outlet. (Do
horizontal deflection or high voltage. Correct
not use an isolation transformer during this
operation of the X-radiation protection circuits
test.) Use a leakage current tester or a
also must be reconfirmed each time they are
metering system that complies with American
serviced. (X-radiation protection circuits also
National Standards Institute (ANSI) C101.1
1-2-1 T2221_ISP
may be called "horizontal disable" or "hold regardless of the AC plug polarity. This chassis
down.") Read and apply the high voltage limits can be safety-serviced only with an isolation
and, if the chassis is so equipped, the X- transformer inserted in the power line between
radiation protection circuit specifications given the receiver and the AC power source, for both
on instrument labels and in the Product Safety personnel and test equipment protection.
& X-Radiation Warning note on the service c. Some TV receiver chassis have a secondary
data chassis schematic. High voltage is ground system in addition to the main chassis
maintained within specified limits by close ground. This secondary ground system is not
tolerance safety-related components/ isolated from the AC power line. The two
adjustments in the high-voltage circuit. If high ground systems are electrically separated by
voltage exceeds specified limits, check each insulation material that must not be defeated or
component specified on the chassis schematic altered.
and take corrective action.
6. Observe original lead dress. Take extra care to
2. Read and comply with all caution and safety- assure correct lead dress in the following areas: a.
related notes on or inside the receiver cabinet, on near sharp edges, b. near thermally hot parts-be
the receiver chassis, or on the picture tube. sure that leads and components do not touch
3. Design Alteration Warning - Do not alter or add thermally hot parts, c. the AC supply, d. high
to the mechanical or electrical design of this TV voltage, and, e. antenna wiring. Always inspect in
receiver. Design alterations and additions, all areas for pinched, out of place, or frayed wiring.
including, but not limited to circuit modifications Check AC power cord for damage.
and the addition of items such as auxiliary audio 7. Components, parts, and/or wiring that appear to
and/or video output connections, might alter the have overheated or are otherwise damaged
safety characteristics of this receiver and create a should be replaced with components, parts, or
hazard to the user. Any design alterations or wiring that meet original specifications.
additions will void the manufacturer's warranty and Additionally, determine the cause of overheating
may make you, the servicer, responsible for and/or damage and, if necessary, take corrective
personal injury or property damage resulting action to remove any potential safety hazard.
therefrom.
8. Product Safety Notice - Some electrical and
4. Picture Tube Implosion Protection Warning - mechanical parts have special safety-related
The picture tube in this receiver employs integral characteristics which are often not evident from
implosion protection. For continued implosion visual inspection, nor can the protection they give
protection, replace the picture tube only with one necessarily be obtained by replacing them with
of the same type number. Do not remove, install, components rated for higher voltage, wattage, etc.
or otherwise handle the picture tube in any Parts that have special safety characteristics are
manner without first putting on shatterproof identified by a # on schematics and in parts lists.
goggles equipped with side shields. People not so Use of a substitute replacement that does not
equipped must be kept safely away while picture have the same safety characteristics as the
tubes are handled. Keep the picture tube away recommended replacement part might create
from your body. Do not handle the picture tube by shock, fire, and/or other hazards. The product's
its neck. Some "in-line" picture tubes are equipped safety is under review continuously and new
with a permanently attached deflection yoke; instructions are issued whenever appropriate.
because of potential hazard, do not try to remove Prior to shipment from the factory, our products
such "permanently attached" yokes from the are strictly inspected to confirm they comply with
picture tube. the recognized product safety and electrical codes
5. Hot Chassis Warning - of the countries in which they are to be sold.
a. Some TV receiver chassis are electrically However, in order to maintain such compliance, it
connected directly to one conductor of the AC is equally important to implement the following
power cord and maybe safety-serviced without precautions when a set is being serviced.
an isolation transformer only if the AC power
plug is inserted so that the chassis is
connected to the ground side of the AC power
source. To confirm that the AC power plug is
inserted correctly, with an AC voltmeter,
measure between the chassis and a known
earth ground. If a voltage reading in excess of
1.0V is obtained, remove and reinsert the AC
power plug in the opposite polarity and again
measure the voltage potential between the
chassis and a known earth ground.
b. Some TV receiver chassis normally have 85V
AC(RMS) between chassis and earth ground
1-2-2 T2221_ISP
Precautions during Servicing
A. Parts identified by the # symbol are critical for
safety.
Replace only with part number specified.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations
applying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise
blocking capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
D. Use specified insulating materials for hazardous
live parts. Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers
4) Insulators for transistors.
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before
soldering.
F. Observe that the wires do not contact heat
producing parts (heat sinks, oxide metal film
resistors, fusible resistors, etc.)
G. Check that replaced wires do not contact sharp
edged or pointed parts.
H. When a power cord has been replaced, check that
5~6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Be careful that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
K. Crimp type wire connector
When replacing the power transformer in sets
where the connections between the power cord
and power transformer primary lead wires are
performed using crimp type connectors, in order to
prevent shock hazards, perform carefully and
precisely the following steps.
Replacement procedure
1) Remove the old connector by cutting the wires
at a point close to the connector.
Important: Do not re-use a connector (discard
it).
2) Strip about 15 mm of the insulation from the
ends of the wires. If the wires are stranded,
twist the strands to avoid frayed conductors.
3) Align the lengths of the wires to be connected.
Insert the wires fully into the connector.
4) Use the crimping tool to crimp the metal sleeve
at the center position. Be sure to crimp fully to
the complete closure of the tool.
L. When connecting or disconnecting the DVD/VCR
connectors, first, disconnect the AC plug from the
AC supply socket.
1-2-3 T2221_ISP
Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and
wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified
values in order to verify compliance with safety standards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between
soldered terminals, and between terminals and Chassis or Secondary Conductor
surrounding metallic parts. (See Fig. 1)
Primary Circuit
Table 1: Ratings for selected area
Clearance d' d
AC Line Voltage Region
Distance (d), (d')
U.S.A. or 3.2 mm
110 to 130 V
Canada (0.126 inches)
Note: This table is unofficial and for reference only. Be
sure to confirm the precise values.
Fig. 1
2. Leakage Current Test
Confirm the specified (or lower) leakage current
between B (earth ground, power cord plug prongs) and
externally exposed accessible parts (RF terminals, Exposed Accessible Part
antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.).
Z
Measuring Method: (Power ON)
Insert load Z between B (earth ground, power cord plug AC Voltmeter
prongs) and exposed accessible parts. Use an AC (High Impedance)
voltmeter to measure across both terminals of load Z.
See Fig. 2 and following table.
Earth Ground
B
Power Cord Plug Prongs
Fig. 2
Table 2: Leakage current ratings for selected areas
AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:
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