Panasonic SA-PTX7EB / SA-PTX7EG Service Manual ▷ View online
20.1. System Control
105
20.2. DVD (Servo)
106
20.3. DVD (Audio)
107
20.4. DVD (Video)
108
20.5. DVD (Interface)
109
20.6. AUDIO SELECTOR
110
20.7. AUDIO (DSP)
111
20.8. AUDIO DiGITAL AMP
112
20.9. DIGITAL 1
113
20.10. DIGITAL 2
114
20.11. POWER
115
21 Schematic Diagram Notes
117
22 Schematic Diagram
119
22.1. DVD Module (DV5/HDMI/FPGA/VIDEO DAC) Circuit 119
22.2. Digital Circuit
127
22.3. Main, D-Port & Panel Circuit
133
22.4. Power, Audio (DSP/D-Amp), AC-Inlet & Regulator Circuit
138
22.5. Tact-1, Tact-2, USB, Relay, Tray Loading & Optical Pickup
Unit Circuit
146
23 Printed Circuit Board
149
23.1. DVD Module P.C.B.
149
23.2. Digital P.C.B.
150
23.3. Main P.C.B.
151
23.4. Panel, D-Port, Tact-1 & Tact -2 P.C.B.
153
23.5. Power & USB P.CB.
154
23.6. Audio (D-Amp/DSP) P.C.B.
155
23.7. AC-Inlet, Regulator, Relay & Tray Loading P.C.B.
156
24 Basic Troubleshooting Guide
157
24.1. Before Repairing — Important
157
24.2. Precaution of Replacement of HDD (Hardisk) — Important
157
24.3. Precaution of Repairing Digital P.C.B. — Important
157
24.4. Troubleshooting Flowchart of HDD Unit, CD Drive Unit &
Main Micron (IC1502)
159
25 Terminal Function of ICs
160
25.1. IC501 (RFKWERE010EA): IC System Control
160
25.2. IC800 (C0HBB0000057): IC FL Display Driver
161
25.3. IC1101 (C1CB00002054): IC LAN (Ethermet Controller)
161
25.4. IC1200 (C1DB00001549): IC Link/Transaction Controller
162
25.5. IC1502 (C2GBC0000300): IC Microcomputer
163
25.6. IC1800 (MN677382FV): IC Sub Microprocessor
165
25.7. IC3201 (C1AB00002259): IC Video Encoder
166
26 Exploded Views
168
26.1. Cabinet Parts Location
169
26.2. Packaging
173
27 Replacement Parts List
175
27.1. Component Parts List
176
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SA-PTX7EB / SA-PTX7EG
1 Safety Precautions
1.1. 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.
1.1.1.
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
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 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be
1.1.2.
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
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
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
1.2. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such C701, C702, C703, C704, C705, C706, C707, C748 through a 10
Ω, 10 W resistor to ground.
Caution:
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 240 V, 50 Hz in NO SIGNAL mode volume minimal should be ~ 600 mA.
Current consumption at AC 240 V, 50 Hz in NO SIGNAL mode volume minimal should be ~ 600 mA.
1.3. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
· No sound is heard when the power is turned on.
· 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
· No sound is heard when the power is turned on.
· 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
6
SA-PTX7EB / SA-PTX7EG
“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.
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.
1.4. 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
Reference No.
Part No.
Part Name & Description
Remarks
340
RAE2025Z-S
TRAVERSE UNIT
[M]
PC701
B3PBA0000402
PHOTO COUPLER
[M]
PC721
B3PBA0000402
PHOTO COUPLER
[M]
TH701
D4CAA5R10001
THERMISTOR
[M]
TH721
D4CAC8R00002
THERMISTOR
[M]
L701
ELF15N035AN
LINE FILTER
[M]
L702
ELF19H010A
CHOKE COIL
[M]
LB102
J0JKB0000020
EMI BEAD CORE
[M]
LB103
J0JKB0000020
EMI BEAD CORE
[M]
LB501
J0JBC0000015
CHIP INDUCTOR
[M]
LB502
J0JBC0000015
CHIP INDUCTOR
[M]
LB503
J0JBC0000015
CHIP INDUCTOR
[M]
LB504
J0JBC0000015
CHIP INDUCTOR
[M]
LB505
J0JBC0000015
CHIP INDUCTOR
[M]
LB506
J0JBC0000015
CHIP INDUCTOR
[M]
LB507
J0JBC0000015
CHIP INDUCTOR
[M]
LB509
J0JBC0000015
CHIP INDUCTOR
[M]
LB510
J0JBC0000015
CHIP INDUCTOR
[M]
LB8701
J0JBC0000015
CHIP INDUCTOR
[M]
T701
ETS19AB221AG
TRANSFORMER
[M]
T721
ETS35BC2K6AD
TRANSFORMER
[M]
T722
G4D1A0000117
SWITCHING TRANSFORMER
[M]
Z701
ERZV10D471CS
ZENER
[M]
RY701
K6B1AEA00015
POWER RELAY
[M]
F701
K5D202BK0005
FUSE 2A
[M]
IP701
K5H302100004
FUSE PROTECTOR
[M]
IP702
K5H2022A0011
FUSE PROTECTOR
[M]
IP703
K5H302100004
FUSE PROTECTOR
[M]
IP722
K5H7512A0010
FUSE PROTECTOR
[M]
P701
K2AA2B000011
JACK AC INLET
[M]
A2
K2CQ2CA00002
AC CORD
[M]
EG
A2
K2CT3CA00004
AC CORD
[M]
EB
C701
F1BAF1020020
1000P
[M]
C702
F1BAF1020020
1000P
[M]
C703
ECQU2A104MLC
0.1µF
[M]
C704
ECQU2A104MLC
0.1µF
[M]
C705
F1BAF471A013
470P
[M]
C706
F1BAF471A013
470P
[M]
C707
F1BAF1020020
1000P
[M]
C748
F1BAF471A013
470P
[M]
7
SA-PTX7EB / SA-PTX7EG
1.5. Caution for AC Cord
For your safety, please read the following text carefully.
This appliance is supplied with a moulded three pin
mains plug for your safety and convenience.
A 5-ampere fuse is fitted in this plug.
Should the fuse need to be replaced please ensure that
the replacement fuse has a rating of 5-ampere and that
it is approved by ASTA or BSI to BS1362.
Check for the ASTA mark
This appliance is supplied with a moulded three pin
mains plug for your safety and convenience.
A 5-ampere fuse is fitted in this plug.
Should the fuse need to be replaced please ensure that
the replacement fuse has a rating of 5-ampere and that
it is approved by ASTA or BSI to BS1362.
Check for the ASTA mark
or the BSI mark
on the
body of the fuse.
If the plug contains a removable fuse cover you must
ensure that it is refitted when the fuse is replaced.
If you lose the fuse cover the plug must not be used
until a replacement cover is obtained.
A replacement fuse cover can be purchased from your
local dealer.
ensure that it is refitted when the fuse is replaced.
If you lose the fuse cover the plug must not be used
until a replacement cover is obtained.
A replacement fuse cover can be purchased from your
local dealer.
If a new plug is to be fitted please observe the wiring
code as stated below.
If in any doubt please consult a qualified electrician.
code as stated below.
If in any doubt please consult a qualified electrician.
IMPORTANT
The wires in this mains lead are coloured in accordance
with the following code:
Blue: Neutral, Brown: Live.
As these colours may not correspond with the coloured
markings identifying the terminals in your plug, proceed
as follows:
The wire which is coloured Blue must be connected to
the terminal which is marked with the letter N or
coloured Black or Blue.
The wire which is coloured Brown must be connected to
the terminal which is marked with the letter L or
coloured Brown or Red.
The wires in this mains lead are coloured in accordance
with the following code:
Blue: Neutral, Brown: Live.
As these colours may not correspond with the coloured
markings identifying the terminals in your plug, proceed
as follows:
The wire which is coloured Blue must be connected to
the terminal which is marked with the letter N or
coloured Black or Blue.
The wire which is coloured Brown must be connected to
the terminal which is marked with the letter L or
coloured Brown or Red.
WARNING: DO NOT CONNECT EITHER WIRE TO
THE EARTH TERMINAL WHICH IS MARKED WITH
THE LETTER E, BY THE EARTH SYMBOL
THE EARTH TERMINAL WHICH IS MARKED WITH
THE LETTER E, BY THE EARTH SYMBOL
OR
COLOURED GREEN OR GREEN/YELLOW.
THIS PLUG IS NOT WATERPROOF KEEP DRY.
Before use
Remove the connector cover.
Remove the connector cover.
How to replace the fuse
The location of the fuse differ according to the type of
AC mains plug (figures A and B). Confirm the AC mains
plug fitted and follow the instructions below.
Illustrations may differ from actual AC mains plug.
The location of the fuse differ according to the type of
AC mains plug (figures A and B). Confirm the AC mains
plug fitted and follow the instructions below.
Illustrations may differ from actual AC mains plug.
1. Open the fuse cover with a screwdriver.
2. Replace the fuse and close or attach the fuse cover.
CAUTION!
IF THE FITTED MOULDED PLUG IS UNSUITABLE
FOR THE SOCKET OUTLET IN YOUR HOME THEN
THE FUSE SHOULD BE REMOVED AND THE
PLUG CUT OFF AND DISPOSED OF SAFELY.
THERE IS A DANGER OF SEVERE ELECTRICAL
SHOCK IF THE CUT OFF PLUG IS INSERTED
INTO ANY 13 AMPERE SOCKET.
IF THE FITTED MOULDED PLUG IS UNSUITABLE
FOR THE SOCKET OUTLET IN YOUR HOME THEN
THE FUSE SHOULD BE REMOVED AND THE
PLUG CUT OFF AND DISPOSED OF SAFELY.
THERE IS A DANGER OF SEVERE ELECTRICAL
SHOCK IF THE CUT OFF PLUG IS INSERTED
INTO ANY 13 AMPERE SOCKET.
Fuse cover
Figure A
Figure
B
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR
PERFORMANCE OF PROCEDURES OTHER THAN
THOSE SPECIFIED HEREIN MAY RESULT IN
HAZARDOUS RADIATION EXPOSURE.
DO NOT OPEN COVERS AND DO NOT REPAIR
YOURSELF. REFER SERVICING TO QUALIFIED
PERSONNEL.
USE OF CONTROLS OR ADJUSTMENTS OR
PERFORMANCE OF PROCEDURES OTHER THAN
THOSE SPECIFIED HEREIN MAY RESULT IN
HAZARDOUS RADIATION EXPOSURE.
DO NOT OPEN COVERS AND DO NOT REPAIR
YOURSELF. REFER SERVICING TO QUALIFIED
PERSONNEL.
WARNING:
TO REDUCE THE RISK OF FIRE, ELECTRIC
SHOCK OR PRODUCT DAMAGE,
SHOCK OR PRODUCT DAMAGE,
DO NOT EXPOSE THIS APPARATUS TO RAIN,
MOISTURE, DRIPPING OR SPLASHING AND THAT
NO OBJECTS FILLED WITH LIQUIDS, SUCH AS
VASES, SHALL BE PLACED ON THE APPARATUS.
NO OBJECTS FILLED WITH LIQUIDS, SUCH AS
VASES, SHALL BE PLACED ON THE APPARATUS.
USE ONLY THE RECOMMENDED ACCESSORIES.
DO NOT REMOVE THE COVER (OR BACK);
DO NOT REMOVE THE COVER (OR BACK);
THERE ARE NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION!
DO NOT INSTALL OR PLACE THIS UNIT IN A
BOOKCASE, BUILT-IN CABINET OR IN
ANOTHER CONFINED SPACE. ENSURE THE
UNIT IS WELL VENTILATED. TO PREVENT RISK
OF ELECTRIC SHOCK OR FIRE HAZARD DUE
TO OVERHEATING, ENSURE THAT CURTAINS
AND ANY OTHER MATERIALS DO NOT
OBSTRUCT THE VENTILATION VENTS.
ANOTHER CONFINED SPACE. ENSURE THE
UNIT IS WELL VENTILATED. TO PREVENT RISK
OF ELECTRIC SHOCK OR FIRE HAZARD DUE
TO OVERHEATING, ENSURE THAT CURTAINS
AND ANY OTHER MATERIALS DO NOT
OBSTRUCT THE VENTILATION VENTS.
DO NOT OBSTRUCT THE UNIT S VENTILATION
OPENINGS WITH NEWSPAPERS, TABLECLOTHS,
CURTAINS, AND SIMILAR ITEMS.
CURTAINS, AND SIMILAR ITEMS.
DO NOT PLACE SOURCES OF NAKED FLAMES,
SUCH AS LIGHTED CANDLES, ON THE UNIT.
DISPOSE OF BATTERIES IN AN
ENVIRONMENTALLY FRIENDLY MANNER.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer. Dispose of used
batteries according to the manufacturer s instructions.
Replace only with the same or equivalent type
recommended by the manufacturer. Dispose of used
batteries according to the manufacturer s instructions.
THIS UNIT IS INTENDED FOR USE IN MODERATE
CLIMATES.
CLIMATES.
This product may receive radio interference caused
by mobile telephones during use. If such interference
is apparent, please increase separation between the
product and the mobile telephone.
by mobile telephones during use. If such interference
is apparent, please increase separation between the
product and the mobile telephone.
The socket outlet shall be installed near the
equipment and easily accessible. The mains plug of
the power supply cord shall remain readily operable.
To completely disconnect this apparatus from the AC
Mains, disconnect the power supply cord plug from
AC receptacle.
equipment and easily accessible. The mains plug of
the power supply cord shall remain readily operable.
To completely disconnect this apparatus from the AC
Mains, disconnect the power supply cord plug from
AC receptacle.
Figure B
Fuse
(5 ampere)
(5 ampere)
Fuse
(5 ampere)
(5 ampere)
Figure A
A A
8
SA-PTX7EB / SA-PTX7EG
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