Panasonic SA-PT860EE / SC-PT860EE Simplified Service Manual ▷ View online
1 Notes:
—This service manual contains technical information which will allow service personnel’s to understand and service this
model.
model.
—If the circuit is changed or modified, this information will be followed by supplement service manual to be filled with the
original service manual.
original service manual.
1) The base for this model is SA-PT860E/EB/EG-K. You can refer to the original service manual (Order no. MD0801011CE). As
such this service manual does not contain the following information as below:-
such this service manual does not contain the following information as below:-
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Accessories
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Self-diagnosis & Special Mode Setting
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Assembling & Disassembling of DVD Mechanism Unit
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Service Fixture and tools
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Measurements & Adjustments
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Basic Troubleshooting Guide
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Overall Simplified Block for PT860
2) Contents include for this service manual:-
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Safety Precautions
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Prevention of Electrostatic Discharge (ESD)
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Precaution of Laser Diode
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About Lead Free Solder (PbF)
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Handling Precautions for Traverse Unit
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Operation Procedures
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Assembling & Disassembling
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Service Position
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Voltage & Waveform Chart
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Illustration of IC’s, Transistors and Diodes
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Wiring Connection Diagram
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Block Diagram
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Schematic Diagram Notes
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Schematic Diagram
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Printed Circuit Board
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Cabinet Exploded Views
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Replacement Parts List
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Schematic Diagram for printing with letter size
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SA-PT860EE
2 Safety Precautions
2.1. GENERAL GUIDELINES
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.
2.1.1. LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1M
chassis, the reading should be between 1M
Ω
and 5.2M
Ω
.
When the exposed metal does not have a return path to the chassis, the reading must be
2.1.2. LEAKAGE CURRENT HOT CHECK
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5k
Ω
, 10 watts resistor, in parallel with a 0.15µF capacitors, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt 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 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may
be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
Figure 1
2.2. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such C5700, C5701, C5703, C5704, C5705, C5706, C5707 through a
10
10
Ω
, 10 W resistor to ground.
Caution:
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode volume minimal should be ~ 600 mA.
2.3. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
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No sound is heard when the power is turned on.
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Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
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SA-PT860EE
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
2.4. Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by
These parts are marked by
in the Schematic Diagrams & Replacement Parts List. It is essential 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.
without permission of manufacturer.
Table 1
Ref. No.
Part No.
Part Name & Description
Remarks
12
REXX0640-J
BLACK WIRE (AC TO SMPS)
[M]
13
REXX0641-J
RED WIRE (AC TO SMPS)
[M]
23
RGRX0067M-B
REAR PANEL
[M]
66
RKMX0141-K
TOP CABINET
[M]
PCB3
REPX0622B
SMPS P.C.B
[M] (RTL)
PCB4
REPX0622B
AC INLET P.C.B
[M] (RTL)
DZ5701
ERZV10V511CS
ZENER
[M]
L5701
ELF15N035AN
LINE FILTER
[M]
L5702
G0B932H00001
LINE FILTER
[M]
L5703
ELF22V020A
LINE FILTER
[M]
T2900
G4D1A0000117
SWITCHING TRANSFORMER
[M]
T5701
ETS42BN1A6AD
SWITCHING TRANSFORMER
[M]
T5751
ETS19AB256AG
SWITCHING TRANSFORMER
[M]
PC5701
B3PBA0000402
PHOTO COUPLER
[M]
PC5702
B3PBA0000402
PHOTO COUPLER
[M]
PC5720
B3PBA0000402
PHOTO COUPLER
[M]
PC5799
B3PBA0000402
PHOTO COUPLER
[M]
F1
K5D502BNA005
FUSE
[M]
FP2901
K5G401A00008
FUSE PROTECTOR
[M]
TH5701
D4CAC8R00002
THERMISTOR
[M]
TH5860
D4CC11040013
THERMISTOR
[M]
P5701
K2AA2B000017
AC INLET
[M]
A2
K2CQ2CA00007
AC CORD
[M]
C5700
F1BAF1020020
1000pF
[M]
C5701
F0CAF334A087
0.33uF
[M]
C5704
F1BAF1020020
1000pF
[M]
C5705
F1BAF1020020
1000pF
[M]
C5706
F1BAF1020020
1000pF
[M]
C5707
F1BAF1020020
1000pF
[M]
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SA-PT860EE
3 Prevention of Electrostatic Discharge (ESD) to
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 electrostatic discharge (ESD).
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 electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
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 (ESD protected)" can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective 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).
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. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)
sufficient to damage an ES device).
sufficient to damage an ES device).
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SA-PT860EE
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