DOWNLOAD Panasonic SA-BTT790EE / SC-BTT790EEK Service Manual ↓ Size: 10.92 MB | Pages: 127 in PDF or view online for FREE

Model
SA-BTT790EE SC-BTT790EEK
Pages
127
Size
10.92 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / BLU-RAY DISCTM HOME THEATER SOUND SYSTEM
File
sa-btt790ee-sc-btt790eek.pdf
Date

Panasonic SA-BTT790EE / SC-BTT790EEK Service Manual ▷ View online

4
1.2.
Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5702, C5703, C5704, C5705, C5706) through a
10 
, 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 at volume minimum 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
“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.
Caution for fuse replacement
5
1.5.
Safety Part Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
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.
Safety
Ref No.
Part No.
Part Name & Description
Remarks
8
REXX1186-J
1P RED WIRE (AC INLET-SMPS)
9
REXX1187-J
1P BLACK WIRE (AC INLET-SMPS)
15
RGRX1006P-K1
REAR PANEL
EE
15
RGRX1006P-L
REAR PANEL
GN
26
RKMX1010A-K1
TOP CABINET
44
RMZ1280
SMPS PCB TOP INSULATOR
51
RXQX1056A
SMPS PC SHEET UNIT
52
RXQX1057
AC-IN PC-SHEET UNIT
A2
K2CJ2DA00008
AC CORD
GN
A2
K2CQ2CA00007
AC CORD
EE
A3
VQT3Z79
O/I BOOK (En)
GN
A3
VQT3Z80
O/I BOOK (Ru/Ur))
EE
A8
RFAX1012N
TRANSMITTER UNIT (TX)
GN
A8
RFAX1012P
TRANSMITTER UNIT (TX)
EE
PCB7
REP4740BA
SMPS P.C.B.
(RTL)
PCB8
REP4740BA
AC INLET  P.C.B.
(RTL)
DZ5701
ERZV10V511CS
ZNR
L5701
ELF19H015A
LINE FILTER
L5703
ELF17N011A
LINE FILTER
T5701
ETS61BA126AD
MAIN TRANSFORMER
T5751
ETS19AB2E6AG
SUB TRANSFORMER
T6100
G4D1A0000142
SWITCHING TRANSFORMER
PC5702
B3PBA0000503
PHOTO COUPLER
PC5720
B3PBA0000503
PHOTO COUPLER
PC5799
B3PBA0000503
PHOTO COUPLER
PC5901
B3PBA0000503
PHOTO COUPLER
F1
K5D312BNA005
FUSE
TH5702
D4CAA5R10001
THERMISTOR
P5701
K2AA2B000017
AC INLET
R5700
ERJ8GEYJ155V
1.5M    1/4W
R5701
ERJ8GEYJ155V
1.5M    1/4W
C5700
F1BAF1020020
1000pF
C5701
F0CAF104A105
0.1uF
C5702
F0CAF104A105
0.1uF
C5703
F0CAF104A105
0.1uF
C5704
F1BAF471A013
470pF
C5705
F1BAF471A013
470pF
C5706
F1BAF471A013
470pF
6
2 Warning
2.1.
Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive
(ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically 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.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi-
num 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 compara-
ble 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) suf-
ficient to damage an ES device).
7
2.2.
Precaution of Laser Diode
Caution:
This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens.
Wavelength: 790 nm (CDs)/660 nm (DVDs)/405 nm (BDs)
Maximum output radiation power from pickup: 100 
µ
W/VDE
Laser radiation from the pickup unit is safety level, but be sure the followings: 
1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous. 
2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pickup lens for a long time.
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  • Here you can View online or download the Service Manual for the Panasonic SA-BTT790EE / SC-BTT790EEK in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic SA-BTT790EE / SC-BTT790EEK Audio. Information contained in Panasonic SA-BTT790EE / SC-BTT790EEK Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.