Panasonic SA-PT460EB / SA-PT460EG Service Manual ▷ View online
16 Wiring Connection Diagram
85
17 Block Diagram
87
17.1. System Control
87
17.2. DVD (Servo)
88
17.3. DVD (Audio)
89
17.4. DVD (HDMI)
90
17.5. VIDEO
91
17.6. Audio
92
17.7. Digital Audio Amp
93
17.8. Power
94
18 Schematic Diagram Notes
95
19 Schematic Diagram
97
19.1. DVD Module Circuit
97
19.2. Main Circuit
102
19.3. Panel Circuit
106
19.4. Power Button, USB Circuit
107
19.5. D-Amp Circuit
108
19.6. Power Supply Circuit
110
19.7. SMPS Circuit
112
19.8. AC Inlet, Ipod Cradle
114
19.9. Coprocessor Circuit
115
19.10. Scart Circuit
116
20 Printed Circuit Board
117
20.1. DVD Module P.C.B.
117
20.2. Main P.C.B.
118
20.3. Panel, Power Button, USB, Power Supply & AC Inlet
P.C.B.
119
20.4. D-Amp P.C.B.
120
20.5. SMPS P.C.B.
121
20.6. Ipod Cradle, Scart & Coprocessor P.C.B.
122
21 Basic Troubleshooting Guide
123
21.1. Troubleshooting Guide for F61 and/or F76
123
21.2. Basic Troubleshooting Guide for Traverse Unit (DVD
Module P.C.B.)
130
21.3. Basic Troubleshooting Guide for HDMI AV Output
131
22 Overall Simplified Block for PT460
133
22.1. SMPS Module & Power Supply Block
134
23 Terminal Function of ICs
135
23.1. IC2001 (C2CBYY00534): IC System Control
135
23.2. IC1701 (MFI341S2095): IC Ipod Video
135
23.3. IC6901(C0HBB0000057): IC FL Driver
136
24 Exploded Views
137
24.1. Cabinet Parts Location
137
24.2. Packaging
138
25 Replacement Parts List
139
25.1. Component Parts List
140
26 Schematic Diagram for printing with letter size
155
5
SA-PT460EB / SA-PT460EG
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
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
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
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
1.2. 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~240 V, 50 Hz in NO SIGNAL mode volume minimal should be ~ 600 mA. (EB)
Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode volume minimal should be ~ 600 mA. (EG)
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.
6
SA-PT460EB / SA-PT460EG
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
“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.
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
Ref. No.
Part No.
Part Name & Description
Remarks
23
RGRX0067A-A2
REAR PANEL
[M]
EG-S/K
23
RGRX0067A-B2
REAR PANEL
[M]
EB-K
PCB3
REPX0622B
SMPS AC INLET P.C.B.
[M]
(RTL)
PC5701
B3PBA0000402
PHOTO COUPLER
[M]
PC5702
B3PBA0000402
PHOTO COUPLER
[M]
PC5720
B3PBA0000402
PHOTO COUPLER
[M]
PC5799
B3PBA0000402
PHOTO COUPLER
[M]
DZ5701
ERZV10V511CS
ZENER
[M]
TH5701
D4CAC8R00002
THERMISTOR
[M]
TH5860
D4CC11040013
THERMISTOR
[M]
L5701
ELF15N035AN
LINE FILTER
[M]
L5702
G0B932H00001
LINE FILTER
[M]
L5703
ELF22V020A
LINE FILTER
[M]
T2900
G4D1A0000117
SWITCHING TRANSFORMER
[M]
T5701
ETS42BN1A6AD
MAIN SWITCHING TRANSFORMER
[M]
T5751
ETS19AB256AG
BACKUP SWITCHING TRANSFORMER
[M]
F1
K5D502BNA005
FUSE
[M]
FP2901
K5G401A00008
FUSE PROTECTOR
[M]
P5701
K2AA2B000017
JACK AC INLET
[M]
A2
K2CQ2CA00007
AC CORD
[M]
EG-S/K
A2
K2CT3CA00004
AC CORD
[M]
EB-K
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]
C5712
F2B2G1810011
180uF 400V
[M]
7
SA-PT460EB / SA-PT460EG
1.5. Caution for AC Cord (For EB only)
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
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.
Figure A
Figure B
Fuse cover
Figure A
Figure B
Fuse
(5 ampere)
(5 ampere)
Fuse
(5 ampere)
(5 ampere)
A A
8
SA-PT460EB / SA-PT460EG
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