1-3
SERVICING PRECAUTIONS
CAUTION: Before servicing the VCR + DVD RECODER cov-
ered by this service data and its supplements and addends,
read and follow the SAFETY PRECAUTIONS. NOTE: if
unforeseen circumstances create conflict between the fol-
lowing servicing precautions and any of the safety precau-
tions in this publications, always follow the safety precau-
tions.
Remember Safety First:
General Servicing Precautions
1. Always unplug the VCR + DVD RECODER AC power cord
from the AC power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an elec-
trolytic capacitor.
Caution: A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may result
in an explosion hazard.
2. Do not spray chemicals on or near this VCR + DVD
RECODER or any of its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
whitch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this VCR + DVD RECODER
and / or any of its electrical assemblies unless all solid-
state device heat sinks are correctly installed.
6. Always connect the test instrument ground lead to an
appropriate ground before connecting the test instrument
positive lead. Always remove the test instrument ground
lead last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter (500V)
to the blades of the attachment plug. The insulation resis-
tance between each blade of the attachment plug and acces-
sible conductive parts (Note 1) should be more than 1M-
ohm.
Note 1: Accessible Conductive Parts include Metal panels,
Input terminals, Earphone jacks,etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field
effect transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor compo-
nent or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a commer-
cially available discharging wrist strap device, which
should be removed for potential shock reasons prior to
applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such
as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static solder removal device. Some
solder removal devices not classified as “anti-static” can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate an electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its protec-
tive package until immediately before you are ready to
install it. (Most replacement ES devices are packaged with
leads electrically shorted together by conductive foam,
aluminum foil,or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution: Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static elec-
tricity sufficient to damage an ES device.)
Summary of Contents for ZRY-316
Page 38: ...3 34 3 35 A B C D E F G H I J K L M N O P Q R S T 2 TUNER CIRCUIT DIAGRAM...
Page 40: ...3 38 3 39 A B C D E F G H I J K L M N O P Q R S T 4 Hi Fi CIRCUIT DIAGRAM...
Page 42: ...3 42 3 43 A B C D E F G H I J K L M N O P Q R S T 6 JACK CIRCUIT DIAGRAM...
Page 43: ...A B C D E F G H I J K L M N O P Q R S T 3 44 3 45 7 TIMER CIRCUIT DIAGRAM 2 TOOL...
Page 44: ...3 46 3 47 8 TIMER CIRCUIT DIAGRAM 3 TOOL 8 TOOL A B C D E F G H I J K L M N O P Q R S T...
Page 45: ...3 48 3 49 9 TIMER CIRCUIT DIAGRAM 4 TOOL A B C D E F G H I J K L M N O P Q R S T...
Page 46: ...3 50 3 51 10 TIMER CIRCUIT DIAGRAM 6 TOOL A B C D E F G H I J K L M N O P Q R S T...
Page 47: ...3 52 3 53 11 TIMER CIRCUIT DIAGRAM 7 TOOL A B C D E F G H I J K L M N O P Q R S T...
Page 50: ...3 58 3 59 PRINTED CIRCUIT DIAGRAMS 1 VCR P C BOARD...
Page 51: ...3 60 3 61 2 SMPS P C BOARD LOCATION GUIDE...
Page 52: ...3 62 3 63 3 JACK P C BOARD LOCATION GUIDE...
Page 54: ......
Page 64: ...3 75 3 MPEG DECODER CS98202 INTERNAL BLOCK DIAGRAM...
Page 65: ...3 76 4 DIGITAL VIDEO DECODER TVP5146PFP INTERNAL BLOCK DIAGRAM...
Page 70: ...3 83 3 84 A B C D E F G H I J K L M N O P Q R S T 2 MPEG DECODER CS98202 CIRCUIT DIAGRAM...
Page 71: ...3 85 3 86 A B C D E F G H I J K L M N O P Q R S T 3 VIDEO CONNECTOR CIRCUIT DIAGRAM...
Page 72: ...A B C D E F G H I J K L M N O P Q R S T 3 87 3 88 4 AUDIO ADC DAC INTERFACE CIRCUIT DIAGRAM...
Page 73: ...3 89 3 90 A B C D E F G H I J K L M N O P Q R S T 5 DV PART CIRCUIT DIAGRAM...
Page 78: ...3 99 3 100 PRINTED CIRCUIT DIAGRAMS 1 VDR P C BOARD TOP VIEW...
Page 79: ...3 101 3 102 2 VDR P C BOARD BOTTOM VIEW...
Page 80: ......
Page 112: ......
Page 132: ...5 20 9 LASER TURN ON SIGNAL F LIC502 PIN 52 LDEN DVD LCN201 PIN17 VRDC LCN201PIN 34...
Page 147: ...5 35 2 Disc Specification 3 Disc Materials 1 DVD ROM Single Layer Dual Layer...
Page 167: ...5 55 5 56 CIRCUIT DIAGRAMS 1 RF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 168: ...5 57 5 58 2 DSP CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 169: ...5 59 5 60 3 COM CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 171: ...5 63 5 64 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...