SA-MAX700GSK - Panasonic Audio Service Manual (repair manual)

PSG1303039CE

Product Color:  (K)...Black Type 

PAGE

PAGE

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

1.1. General Guidelines---------------------------------------- 3
1.2. Before Use -------------------------------------------------- 4
1.3. Before Repair and Adjustment ------------------------- 4
1.4. Protection Circuitry ---------------------------------------- 4
1.5. Caution For AC Cord ------------------------------------- 5
1.6. Caution For Fuse Replacement------------------------ 6
1.7. Safety Parts Information  -------------------------------- 6

2 Warning -------------------------------------------------------------- 7

2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostaticy Sensitive (ES) Devices---------- 7

2.2. Precaution of Laser Diode------------------------------- 8
2.3. Service caution based on Legal restrictions -------- 9
2.4. Handling Precautions for Traverse Unit-------------10

2.5. Grounding for electrostatic breakdown

prevention-------------------------------------------------- 11

3 Service Navigation --------------------------------------------- 12

3.1. Service Information -------------------------------------- 12
3.2. Firmware Update Procedure -------------------------- 13

4 Specifications ---------------------------------------------------- 14
5 General/Introduction------------------------------------------- 15

5.1. Media Information---------------------------------------- 15

6 Location of Controls and Components------------------ 16

6.1. Remote Control Key Button Operation ------------- 16
6.2. Main Unit Key Button Operation---------------------- 17

7 Instation Instructions -------------------------------------- 18

7.1. Speaker and A/C Connection ------------------------- 18

8 Service Mode ----------------------------------------------------- 19

8.1. Cold-Start -------------------------------------------------- 19

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8.2. Doctor Mode Table--------------------------------------- 20
8.3. Reliability Test Mode (CD Mechanism Unit) ------- 23
8.4. Self-Diagnostic Mode ----------------------------------- 24
8.5. Self-Diagnostic Error Code Table -------------------- 24
8.6. Sales Demonstration Lock Function ---------------- 25

9 Troubleshooting Guide---------------------------------------- 26

10 Disassembly and Assembly Instructions --------------- 27

10.1. Screw Types----------------------------------------------- 27
10.2. Disassembly Flow Chart-------------------------------- 28
10.3. Main Components and P.C.B. Locations ----------- 29
10.4. Disassembly of Top Cabinet--------------------------- 30
10.5. Disassembly of Front Panel Unit --------------------- 31
10.6. Disassembly of FL Display P.C.B. ------------------- 31
10.7. Disassembly of Illumination Button P.C.B. --------- 32
10.8. Disassembly of Control P.C.B. ------------------------ 32
10.9. Disassembly of Control Jog LED P.C.B.------------ 34

10.10. Disassembly of Volume P.C.B.------------------------ 34

10.11. Disassembly of Volume Jog LED P.C.B. ----------- 36

10.12. Disassembly of Remote Sensor P.C.B.------------- 36
10.13. Disassembly of USB P.C.B. --------------------------- 36
10.14. Disassembly of Mic P.C.B. ----------------------------- 37
10.15. Disassembly of LED P.C.B.---------------------------- 37
10.16. Disassembly of CD Lid---------------------------------- 38
10.17. Disassembly of Rear Panel---------------------------- 39
10.18. Disassembly of CD Mechanism Unit ---------------- 40
10.19. Disassembly of Main P.C.B. --------------------------- 40
10.20. Disassembly of Digital Amplifier IC (IC2501/

IC2502/IC2503/IC2504) -------------------------------- 41

10.21. Disassembly of SMPS P.C.B. and Voltage

Selector P.C.B.-------------------------------------------- 42

10.22. Replacement of Switching Regulator (Q5700) --- 44
10.23. Replacement of Rectifier Diode (D5801)----------- 46
10.24. Replacement of Rectifier Diode (D5802)----------- 47
10.25. Disassembly of CD Interface P.C.B.----------------- 49

11 Service Position ------------------------------------------------- 50

11.1. Checking of FL Display P.C.B., Control P.C.B.,

Volume P.C.B., Mic P.C.B. and USB P.C.B. ------- 50

11.2. Checking of Main P.C.B. (Side B) -------------------- 51
11.3. Checking of Main P.C.B. (Side A) -------------------- 52
11.4. Checking of SMPS P.C.B.------------------------------ 53

12 Block Diagram --------------------------------------------------- 55

12.1. Servo & System Control -------------------------------- 55
12.2. IC Terminal Chart----------------------------------------- 58
12.3. Audio -------------------------------------------------------- 59
12.4. Power Supply --------------------------------------------- 61

13 Wiring Connection Diagram --------------------------------- 63
14 Schematic Diagram--------------------------------------------- 65

14.1. Schematic Diagram Notes ----------------------------- 65
14.2. Main (CD Servo/Micon/Damp) Circuit -------------- 67
14.3. FL Display Circuit ---------------------------------------- 81
14.4. Volume Circuit--------------------------------------------- 83
14.5. Control & USB Circuit ----------------------------------- 84
14.6. Mic Circuit -------------------------------------------------- 85
14.7. Remote Sensor, LED & Illumination Button

Circuit ------------------------------------------------------- 86

14.8. SMPS Circuit ---------------------------------------------- 87
14.9. Voltage Selector, Control Jog LED, Volume

Jog LED & CD Interface Circuit ---------------------- 89

15 Printed Circuit Board ------------------------------------------ 90

15.1. Main P.C.B. ------------------------------------------------ 90
15.2. FL Display & Volume P.C.B. --------------------------- 92

15.3. Control, Mic, USB, Remote Sensor, LED &

Illumination Button P.C.B.------------------------------ 93

15.4. SMPS & Voltage Selector P.C.B. -------------------- 94
15.5. Control Jog LED, Volume Jog LED & CD

Interface P.C.B.------------------------------------------- 95

16 Appendix Information of Schematic Diagram -------- 97

16.1. Voltage & Waveform Chart ---------------------------- 97

17 Exploded View and Replacement Parts List---------- 107

17.1. Exploded View and Mechanical replacement

Part List --------------------------------------------------- 107

17.2. Electrical Replacement Part List -------------------- 113

3

1. IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by   in the
Schematic Diagrams, Circuit Board Layout, Exploded Views and Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent X-RADIATION, shock, fire, or other hazards. Do not modify
the original design without permission of manufacturer.

2. An Isolation Transformer should always be used during the servicing of AC Adaptor whose chassis is not isolated from the AC

power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal
injury from electrical shocks. It will also protect AC Adaptor from being damaged by accidental shorting that may occur during
servicing.

3. 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.

4. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly

installed.

5. After servicing, make 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 1-1.

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 1-1

4

Be sure to disconnect the mains cord before adjusting the voltage selector as shown in Figure 1-2.
Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be
used.
Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries,
the correct voltage is already set.)

Figure 1-2

Disconnect AC power to discharge the AC Capacitors (C5701, C5702, C5703, C5704, C5705, C5707, C5708) through a 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 110~127 V/220~240 V, 50/60 Hz in FM Tuner at volume minimum should be ~ 850mA.

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.