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PSG1202003CE
CD Stereo System
Model No. SA-AKX34PH
SA-AKX34PN
Product Color: (K)...Black Type
Please refer to the original service manual for:
CD Mechanism Unit (BRS11C), Order No. PSG1201019AE
Speaker system SB-AKX34PN-K, Order No. PSG1202004CE
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 3 3 Service Navigation --------------------------------------------- 11
1.1. General Guidelines---------------------------------------- 3 3.1. Service Information -------------------------------------- 11
1.2. Before Use (For PH only)-------------------------------- 3 4 Specifications ---------------------------------------------------- 12
1.3. Before Repair and Adjustment ------------------------- 3 5 General/Introduction------------------------------------------- 13
1.4. Protection Circuitry ---------------------------------------- 4 5.1. Media Information---------------------------------------- 13
1.5. Caution For Fuse Replacement------------------------ 4 6 Location of Controls and Components------------------ 14
1.6. Safety Parts Information --------------------------------- 5 6.1. Remote Control Key Button Operation ------------- 14
2 Warning -------------------------------------------------------------- 6 6.2. Main Unit Key Button Operation---------------------- 15
2.1. Prevention of Electrostatic Discharge (ESD) 7 Installation Instructions -------------------------------------- 16
to Electrostatic Sensitive (ES) Devices -------------- 6 7.1. Speaker and A/C Connection ------------------------- 16
2.2. Precaution of Laser Diode------------------------------- 7 8 Service Mode ----------------------------------------------------- 17
2.3. Service caution based on Legal restrictions -------- 8 8.1. Cold-Start -------------------------------------------------- 17
2.4. Handling Precautions for Traverse Unit-------------- 9 8.2. Doctor Mode Table--------------------------------------- 18
8.3. Reliability Test Mode (CD Mechanism Unit 16.4. Main(D-Amp) Circuit ------------------------------------ 85
(BRS11C)) ------------------------------------------------- 21 16.5. Panel Circuit ---------------------------------------------- 87
8.4. Self-Diagnostic Mode ----------------------------------- 22 16.6. Remote Sensor, USB, Music Port and
8.5. Self-Diagnostic Error Code Table -------------------- 22 Memory LED Circuit------------------------------------- 89
8.6. Sales Demonstration Lock Function ---------------- 23 16.7. CD Interface and Voltage Selector Circuit--------- 90
9 Troubleshooting Guide---------------------------------------- 24 16.8. SMPS Circuit---------------------------------------------- 91
9.1. Part Location ---------------------------------------------- 24 17 Printed Circuit Board------------------------------------------ 93
9.2. Troubleshooting Guide for F61 and/or F76 -------- 27 17.1. CD Servo P.C.B. ----------------------------------------- 93
9.3. D-Amp IC Operation & Control ----------------------- 28 17.2. Main P.C.B. (Side A) ------------------------------------ 94
10 Service Fixture & Tools --------------------------------------- 30 17.3. Main P.C.B. (Side B) ------------------------------------ 95
11 Disassembly and Assembly Instructions --------------- 31 17.4. Panel, Remote Sensor, USB and Music Port
11.1. Disassembly Flow Chart-------------------------------- 32 P.C.B. ------------------------------------------------------- 96
11.2. Main Components and P.C.B. Locations ----------- 33 17.5. Memory LED and CD Interface P.C.B -------------- 97
11.3. Disassembly of Top Cabinet--------------------------- 34 17.6. SMPS and Voltage Selector (PH) ------------------- 98
11.4. Disassembly of Front Panel Unit --------------------- 35 17.7. SMPS P.C.B. (PN)--------------------------------------- 99
11.5. Disassembly of Panel P.C.B. -------------------------- 36 18 Appendix Information of Schematic Diagram ------- 101
11.6. Disassembly of Memory LED P.C.B. ---------------- 38 18.1. Voltage & Waveform Chart --------------------------- 101
11.7. Disassembly of Remote Sensor P.C.B.------------- 38 18.2. Illustration of ICs, Transistor and Diode----------- 108
11.8. Disassembly of USB P.C.B. --------------------------- 39 18.3. Terminal Function of ICs ------------------------------ 109
11.9. Disassembly of Music Port P.C.B. ------------------- 39 19 Exploded View and Replacement Parts List---------- 111
11.10. Disassembly of CD Lid---------------------------------- 40 19.1. Exploded View and Mechanical replacement
11.11. Disassembly of Main P.C.B. --------------------------- 40 Part List --------------------------------------------------- 111
11.12. Replacement of Voltage Regulator IC 19.2. Electrical Replacement Part List -------------------- 117
(IC2010) ---------------------------------------------------- 42
11.13. Replacement of Voltage Regulator IC
(IC2011) ---------------------------------------------------- 43
11.14. Replacement of Audio Digital Amp IC
(IC5800) ---------------------------------------------------- 44
11.15. Disassembly of SMPS P.C.B. ------------------------- 45
11.16. Replacement of Switching Regulator IC
(IC5701) ---------------------------------------------------- 46
11.17. Replacement of Rectifier Diode (D5702)----------- 47
11.18. Replacement of Rectifier Diode (D5801)----------- 48
11.19. Replacement of Rectifier Diode (D5802)----------- 50
11.20. Replacement of Regulator Diode (D5803)--------- 51
11.21. Disassembly of CD Mechanism Unit
(BRS11C) -------------------------------------------------- 53
11.22. Disassembly of CD Interface P.C.B.----------------- 55
11.23. Disassembly of CD Servo P.C.B.--------------------- 55
11.24. Disassembly of Rear Panel---------------------------- 56
11.25. Disassembly of Voltage Selector P.C.B.------------ 57
12 Service Position ------------------------------------------------- 58
12.1. Checking and Repairing of Main P.C.B. ------------ 58
12.2. Checking and Repairing of Panel P.C.B. ----------- 58
12.3. Checking and Repairing of SMPS P.C.B. ---------- 59
12.4. Checking and Repairing of CD Servo P.C.B.
(Side A) ----------------------------------------------------- 60
12.5. Checking and Repairing of CD Servo P.C.B.
(Side B) ----------------------------------------------------- 61
13 Simplified Block Diagram ------------------------------------ 63
13.1. Power Block Diagram ----------------------------------- 63
14 Block Diagram --------------------------------------------------- 64
14.1. Servo & System Control -------------------------------- 64
14.2. IC Terminal Chart----------------------------------------- 66
14.3. Audio -------------------------------------------------------- 67
14.4. Power Supply --------------------------------------------- 68
15 Wiring Connection Diagram --------------------------------- 70
16 Schematic Diagram--------------------------------------------- 71
16.1. Schematic Diagram Notes ----------------------------- 71
16.2. CD Servo Circuit------------------------------------------ 73
16.3. Main(MICON) Circuit ------------------------------------ 77
2
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 and 5.2M.
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, 10 watts resistor, in parallel with a 0.15F 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
1.2. Before Use (For PH only)
Be sure to disconnect the mains cord before adjusting the voltage selector.
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. (If the power supply in your area is 110V ~ 127V or 220V ~ 240V, set to the "110V ~ 127V or 220V ~ 240V" position.)
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.)
1.3. Before Repair and Adjustment
Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5704 (For PH), C5705 (For PH), C5708)
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 110~127 V / 220~240 V, 50/60 Hz in Power ON, FM Tuner, No Signal, volume minimal mode should be
~ 600 mA (PH).
Current consumption at AC 120 V, 60 Hz in Power ON, FM Tuner, No Signal, volume minimal mode should be ~ 600 mA (PN).
3
1.4. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
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