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

PSG1203028CE

Vol.1

Product Color:  (K)...Black Type

PAGE

PAGE

1 Safety Precautions----------------------------------------------- 3

1.1. General Guidelines---------------------------------------- 3
1.2. Before Repair and Adjustment ------------------------- 4
1.3. Protection Circuitry ---------------------------------------- 4
1.4. Caution for fuse replacement--------------------------- 4
1.5. Safety Part Information----------------------------------- 5

2 Warning -------------------------------------------------------------- 6

2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostatic Sensitive (ES) Devices -------------- 6

2.2. Precaution of Laser Diode------------------------------- 7
2.3. Service caution based on Legal restrictions -------- 8
2.4. Grounding for electrostatic breakdown

prevention --------------------------------------------------- 9

3 Service Navigation --------------------------------------------- 10

3.1. Service Information -------------------------------------- 10
3.2. How to update the Firmware -------------------------- 11

4 Specifications ---------------------------------------------------- 13

4.1. Others (Licences) ---------------------------------------- 14

5 General/Introduction------------------------------------------- 16

5.1. VIERA Link™ “HDAVI Control™” -------------------- 16
5.2. Enjoying BD-LIVE---------------------------------------- 16
5.3. Enjoying 3D Video and Photos ----------------------- 17
5.4. Playable Media ------------------------------------------- 17
5.5. File Extension Type Support (MP3/JPEG/

DivX/MKV/FLAC/WAV/MPO)-------------------------- 19

6 Location of Controls and Components------------------ 20

2

6.1. Remote Control Key Button Operations ------------ 20
6.2. Main Unit Key Button Operations -------------------- 21

7 Installation Instructions--------------------------------------- 22

7.1. Speaker Connection ------------------------------------- 22
7.2. Connection to a TV -------------------------------------- 22
7.3. FM Antenna Connection ------------------------------- 23
7.4. Connection to the Network ---------------------------- 23
7.5. Playing Back Contents on the DLNA Server

(DLNA) ------------------------------------------------------ 24

7.6. Enjoying Network Service------------------------------ 25

8 Operating Instructions ---------------------------------------- 26

8.1. Taking out the Disc from Drive Unit when the

Disc cannot be ejected by OPEN/CLOSE
button-------------------------------------------------------- 26

8.2. Using the iPod/iPhone ---------------------------------- 27
8.3. Easy Network Setting ----------------------------------- 30

9 Service Mode ----------------------------------------------------- 31

9.1. Special Mode Setting------------------------------------ 31
9.2. Error Codes------------------------------------------------ 36
9.3. To enter into Service Mode ---------------------------- 39

10 Troubleshooting Guide---------------------------------------- 47

10.1. Troubleshooting Guide for F61 and/or F76 -------- 47

11 Service Fixture & Tools --------------------------------------- 50

12 Disassembly and Assembly Instructions --------------- 51

12.1. Screw Type ------------------------------------------------ 51
12.2. Disassembly Flow Chart-------------------------------- 52
12.3. Main Components and P.C.B. Locations ----------- 53
12.4. Disassembly of Top Cabinet--------------------------- 54
12.5. Replacement of Tray Ornament ---------------------- 55
12.6. Disassembly of Wi-Fi P.C.B. (For SA-

BTT790GN-K)--------------------------------------------- 57

12.7. Disassembly of Front Panel Block Assembly ----- 57
12.8. Replacement of Front Lid Assembly ---------------- 59
12.9. Disassembly of Operation Button P.C.B. ----------- 61

12.10. Disassembly of Power Button P.C.B.---------------- 61

12.11. Disassembly of iPod Cradle Assembly ------------- 62

12.12. Disassembly of iPod P.C.B.---------------------------- 64
12.13. Disassembly of Panel P.C.B. -------------------------- 65
12.14. Disassembly of Rear Panel---------------------------- 66
12.15. Disassembly of Fan Unit ------------------------------- 67
12.16. Disassembly of Wireless Adapter P.C.B.----------- 67
12.17. Disassembly of AV P.C.B.------------------------------ 68
12.18. Disassembly of Digital P.CB. -------------------------- 69
12.19. Disassembly of D-Amp P.C.B. ------------------------ 72
12.20. Replacement of Digital Amplifier IC (IC5200/

IC5300) ----------------------------------------------------- 73

12.21. Disassembly of AC Inlet P.C.B. ----------------------- 74
12.22. Disassembly of SMPS P.C.B. ------------------------- 76
12.23. Replacement of Switching Regulator IC

(IC5701) ---------------------------------------------------- 78

12.24. Replacement of Diode (D5702) ---------------------- 80
12.25. Replacement of Diode (D5802) ---------------------- 82
12.26. Replacement of Diode (D5803) ---------------------- 83
12.27. Disassembly of BD Mechanism Unit

(BRS14P) -------------------------------------------------- 84

13 Service Position ------------------------------------------------- 86

13.1. Checking and Repairing Panel P.C.B. -------------- 86
13.2. Checking and Repairing Digital P.C.B.-------------- 86
13.3. Checking and Repairing D-Amp P.C.B.------------- 88
13.4. Checking and Repairing SMPS P.C.B. ------------- 89

14 Measurements and Adjustments -------------------------- 90

14.1. Standard Inspection Specifications after

Making Repairs------------------------------------------- 90

15 Overall Simplified Block Diagram------------------------- 91
16 Block Diagram --------------------------------------------------- 92

16.1. System Control ------------------------------------------- 92
16.2. Audio and Video ----------------------------------------- 93
16.3. Power Supply(Main Section) ------------------------- 95

17 Wiring Connection Diagram -------------------------------- 97
18 Schematic Diagram -------------------------------------------- 99

18.1. Schematic Diagram Notes ---------------------------- 99
18.2. Digital(Micon/Power) Circuit ------------------------- 101
18.3. AV Circuit ------------------------------------------------- 110
18.4. D-Amp Circuit-------------------------------------------- 111
18.5. Panel Circuit --------------------------------------------- 114
18.6. Power Button, Operation Button and iPod

Circuit ------------------------------------------------------ 115

18.7. SMPS Circuit--------------------------------------------- 116
18.8. AC Inlet and Wireless Adapter Circuit ------------- 118

19 Printed Circuit Board----------------------------------------- 119

19.1. Digital P.C.B. --------------------------------------------- 119
19.2. AV, Panel, Power Button, Operation Button

and iPod P.C.B. ----------------------------------------- 121

19.3. D-Amp P.C.B. -------------------------------------------- 122
19.4. SMPS, AC Inlet and Wireless Adapter P.C.B. --- 123

20 Appendix Information of Schematic Diagram ------- 125

20.1. Voltage & Waveform Chart --------------------------- 125
20.2. Illustration of ICs, Transistor and Diode----------- 132
20.3. Terminal Function of ICs ------------------------------ 133

21 Exploded View and Replacement Parts List---------- 135

21.1. Exploded View and Mechanical replacement

Part List --------------------------------------------------- 135

21.2. Electrical Replacement Part List -------------------- 139

3

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. 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

Ω

 and 5.2M

Ω

.

When the exposed metal does not have a return path to the chassis, the reading must be 

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 0.15

µ

F 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.

Figure 1

4

Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5702, C5703, C5704, C5705, C5706) through a
10 

Ω

, 10 W resistor to ground.

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.

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.