Panasonic SAAKX-90-PH, SAAKX-90-PR Service manual

PSG1003010CE

CD Stereo System

Model No. SA-AKX90PH
SA-AKX90PR
Product Color: (K)...Black Type
Notes: Please refer to the original service manual for:
O CD Mechanism Unit (DLS6C),Order No:MD0803034CE O Speaker System SB-AKX90PH-K,Order No.:PSG1003001CE
PAGE PAGE
1 Safety Precautions----------------------------------------------- 4
1.1. General Guidelines---------------------------------------- 4
1.2. Before Use -------------------------------------------------- 4
1.3. Caution For Fuse Replacement ------------------------ 4
1.4. Before Repair and Adjustment ------------------------- 4
1.5. Protection Circuitry---------------------------------------- 5
1.6. Safety Parts Information----------------------------------5
2Warning--------------------------------------------------------------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
© Panasonic Corporation 2010. All rights reserved. Unauthorized copying and distribution is a violation of law.
2.4. Handling Precautions for Traverse Unit --------------9
3 Service Navigation----------------------------------------------11
3.1. Service Information --------------------------------------11
4 Specifications ----------------------------------------------------12 5 Location of Controls and Components------------------13
5.1. Main Unit Key Button Operation----------------------13
5.2. Remote Control Key Button Operation-------------14
5.3. Media Information----------------------------------------15
6 Self-Diagnostic and Special Mode Setting -------------16
6.1. Cold-Start---------------------------------------------------16
6.2. Doctor Mode Table---------------------------------------17
6.3. Reliability Test Mode (CD Mechanism Unit (DLS6C)) ---------------------------------------------------19
6.4. Self-Diagnostic Mode -----------------------------------20
6.5. Self-Diagnostic Error Code Table --------------------21
7 Troubleshooting Guide----------------------------------------22
7.1. Troubleshooting Guide for F61 and/or F76)-------22
7.2. Part Location ----------------------------------------------23
7.3. D-Amp IC Operation & Control -----------------------27
8 Service Fixture & Tools---------------------------------------29
8.1. Service Tools and Equipment-------------------------29
9 Disassembly and Assembly Instructions---------------30
9.1. Disassembly Flow Chart--------------------------------31
9.2. Main Components and P.C.B. Locations-----------32
9.3. Disassembly of Top Cabinet---------------------------33
9.4. Disassembly of Tuner P.C.B.--------------------------34
9.5. Disassembly of Front Panel Assembly -------------34
9.6. Disassembly of Panel P.C.B.--------------------------36
9.7. Disassembly of Remote Sensor P.C.B.-------------37
9.8. Disassembly of CD Open Button P.C.B.------------38
9.9. Disassembly of Jupiter P.C.B.-------------------------39
9.10. Disassembly of Music Port/Headphone P.C.B.---39
9.1 1 . Disassembly of CD Lid----------------------------------40
9.12. Disassembly of Main P.C.B.---------------------------41
9.13. Replacement of Regulator IC (IC2010)-------------42
9.14. Disassembly of Mic P.C.B.-----------------------------43
9.15. Disassembly of D-Amp P.C.B.------------------------44
9.16. Disassembly of SMPS P.C.B.-------------------------46
9.17. Replacement of Switching Regulator IC (IC5701) ----------------------------------------------------47
9.18. Replacement of Rectifier Diode (D5702)-----------48
9.19. Replacement of Regulator Diode (D5801)---------50
9.20. Replacement of Regulator Diode (D5802)---------51
9.21. Replacement of Regulator Diode (D5803)---------52
9.22. Disassembly of CD Mechanism Unit (DLS6C) ---53
9.23. Disassembly of Rear Panel----------------------------55
9.24. Disassembly of Voltage Selector P.C.B.------------56
9.25. Disassembly of CD Servo P.C.B.---------------------57
9.26. Replacement of Audio Digital Amp IC (IC5000) ----------------------------------------------------58
9.27. Replacement of Audio Digital Amp IC (IC5400) ----------------------------------------------------59
9.28. Replacement of Audio Digital Amp IC (IC5200) ----------------------------------------------------60
9.29. Replacement of Audio Digital Amp IC (IC5300) ----------------------------------------------------61
9.30. Disassembly of Surround D-Amp P. C.B. -----------62
9.31. Replacement of Audio Digital Amp IC (IC5900) ----------------------------------------------------63
10 Replacement of Traverse Unit------------------------------65
10.1. Disassembling Procedures----------------------------65
10.2. Assembling Procedure --------------------------------- 66
11 Service Position------------------------------------------------- 68
11.1. Checking and Repairing of Main P.C.B.------------ 68 1 1 .2. Checking and Repairing of D-Amp P.C.B.--------- 68
11.3. Checking and Repairing of Surround D-Amp P.C.B. ------------------------------------------------------- 68
1 1.4. Checking and Repairing of Panel P.C.B. ---------- 68
11.5. Checking and Repairing of Jupiter P.C.B.--------- 69
11.6. Checking and Repairing of SMPS P.C.B.---------- 69
12 Voltage & Waveform Chart ---------------------------------- 71
12.1. CD Servo P.C.B.----------------------------------------- 71
12.2. Main P.C.B. (1/3)----------------------------------------- 72
12.3. Main P.C.B. (2/3)----------------------------------------- 73
12.4. Main P.C.B. (3/3)----------------------------------------- 74
12.5. Jupiter P.C.B. (1/3)-------------------------------------- 75
12.6. Jupiter P.C.B. (2/3)-------------------------------------- 76
12.7. Jupiter P.C.B. (3/3)-------------------------------------- 77
12.8. Panel P.C.B.----------------------------------------------- 77
12.9. D-Amp P.C.B.--------------------------------------------- 78
12.10. SMPS P.C.B.---------------------------------------------- 79
12.1 1. Tuner P.C.B.----------------------------------------------- 79
12.12. Surround D-Amp P.C.B.-------------------------------- 80
12.13. Mic P.C.B.-------------------------------------------------- 80
12.14. Waveform T able (1/2)----------------------------------- 81
12.15. Waveform T able (2/2)----------------------------------- 82
13 Illustration of ICs, Transistor and Diode---------------- 83 14 Simplified Block Diagram------------------------------------ 85
14.1. Overall Simplified Block Diagram-------------------- 85
14.2. D-Amp Block Diagram---------------------------------- 86
15 Block Diagram--------------------------------------------------- 87
15.1. Servo/System Control ---------------------------------- 87
15.2. I C Terminal Chart (Servo/System Control)-------- 88
15.3. Audio-------------------------------------------------------- 89
15.4. Power Amplifier ------------------------------------------ 90
15.5. Power Supply--------------------------------------------- 92
16 Wiring Diagram-------------------------------------------------- 93 17 Schematic Diagram Notes----------------------------------- 95 18 Schematic Diagram-------------------------------------------- 97
18.1. CD Servo Circuit ----------------------------------------- 97
18.2. Main Circuit------------------------------------------------ 98
18.3. Jupiter Circuit --------------------------------------------104
18.4. Panel Circuit ---------------------------------------------108
18.5. CD Open Button, Remote Sensor, Tuner & Music Port/Headphone Circuit-----------------------110
18.6. D-Amp Circuit--------------------------------------------111
18.7. Surround D-Amp Circuit ------------------------------ 113
18.8. SMPS Circuit---------------------------------------------114
18.9. Mic & Voltage Selector Circuit-----------------------116
19 Printed Circuit Board-----------------------------------------117
19.1. CD Servo, Mic & Voltage Selector P.C.B. -------- 117
19.2. Main P.C.B.-----------------------------------------------118
19.3. Jupiter P.C.B.--------------------------------------------119
19.4. Panel P.C.B.----------------------------------------------120
19.5. CD Open Button, Remote Sensor, Tuner, Music Port/Headphone & Surround D-Amp P.C.B. ------------------------------------------------------121
19.6. D-Amp P.C.B.--------------------------------------------122
19.7. SMPS P.C.B.---------------------------------------------123
20 Terminal Function of ICs------------------------------------125
20.1. IC2003 (RFKWMAKX90PH): IC MICRO PROCESSOR -------------------------------------------125
2
20.2. IC6901(C0HBB0000057): IC FL Driver-----------126
21 Exploded View and Replacement Parts List ---------127
21.1. Exploded View and Mechanical replacement Part List ---------------------------------------------------127
21.2. Electrical Replacement Part List--------------------133
3

1 Safety Precautions

1.1. General Guidelines

1. W hen servicing, observe the original lead dress. If a short circuit is found, repla ce all parts which have been overheated or damaged by the short circuit.
2. After servicin g, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicin g, 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. Mea sure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cab inet 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 5.2MΩ. When the exposed metal does not have a return path to the chassis, the reading must be

1.1.2. Leakege 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 0.15µF 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 p otential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 o r 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 befo re it is returned to the customer.
Figure 1

1.2. Before Use

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 i f this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is already set.)

1.3. Caution For Fuse Replacement

1.4. Before Repair and Adjustment

Disconnect AC power to discharge unit AC Capacitors as such (C5701, C5703, C5704, C5705, C5706, C5707, C570 8) 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.
4
Current consumption at AC 110~127 V / 220~240 V, 50/60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA.

1.5. 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.

1.6. Safety Parts 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,Exploded View & 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.
SafetyRef. No. Part No. Part Name & Description Remarks
6 REXX1030 1P RED WIRE (VOLTAGE-SMPS)
7 REXX1031 1P BLACK WIRE (VOLTAGE-SMPS)
13 RGRX1002E-A1 REAR PANEL PH
13 RGRX1002E-B1 REAR PANEL PR
37 RKMX1003-K TOP CABINET
401 RAEX0190Z-V TRAVERSE UNIT
A2 K2CA2YY00039 AC CORD PR
A2 K2CQ2CA00007 AC CORD PH
A3 RQTX1099-M O/I BOOK (En/Sp)
PCB3 REPX0809F SMPS P.C.B. (RTL)
PCB11 REPX0809F VOLTAGE SELECTOR P.C.B. (RTL)
DZ5701 ERZV10V511CS ZNR
S5701 K0ABCA000007 SW VOLTAGE SELECTOR
L5703 G0B932H00002 LINE FILTER
T5701 G4DYZ0000049 SWITCHING TRANSFORMER
T5751 ETS19AB2E6AG SUB TRANSFORMER
T6000 G4DYA0000214 SWITCHING TRANSFORMER
PC5701 B3PBA0000402 PHOTO COUPLER
PC5702 B3PBA0000402 PHOTO COUPLER
PC5720 B3PBA0000402 PHOTO COUPLER
PC5799 B3PBA0000402 PHOTO COUPLER
F1 K5D802BNA005 FUSE
TH5702 D4CAA2R20001 THERMISTOR
TH5860 D4CC11040013 THERMISTOR
TH5900 D4CC11040013 THERMISTOR
P5701 K2AA2B000011 AC INLET
C5701 F0CAF334A105 0.33uF
C5703 F0CAF104A105 0.1uF
C5704 F1BAF1020020 1000pF
C5705 F1BAF1020020 1000pF
C5706 F1BAF1020020 1000pF
C5707 F1BAF1020020 1000pF
C5708 F1BAF1020020 1000pF
5

2Warning

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 Elec­trostatically 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 da mage 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, p lace the assembly on a cond ucti ve surface su ch as a lumi­num 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 compara­ble 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 lif ting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).
6

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: 785 nm (CD) Maximum output radiation power from pickup: 100 µW/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.
7

2.3. Service caution based on Legal restrictions

2.3.1. General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting process of all electrical compone nts on the printed circuit boards used for this equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainl y consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that of the normal solder.
Definition of PCB Lead Free Solder being used
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used. (Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the lead free solder.
• Use the soldering iron (more than 70W) equi pped with the temperature co ntrol after setting the temp erature at 350±30 degrees C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route. RFKZ03D01K-----------(0.3mm 100g Reel) RFKZ06D01K-----------(0.6mm 100g Reel) RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
8

2.4. Handling Precautions for Traverse Unit

The laser diode in the optical pickup unit may break down due to static electricity of clothes or human b ody. Special care must be taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.

2.4.1. Cautions to Be Taken in Handling the Optical Pickup Unit

The laser diode in the optical pickup un it may be damaged due to electrostatic discharge generating from clothes or human body. Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexi­ble cable, cut off the antistatic FPC.

2.4.2. Grounding for electrostatic breakdown prevention

Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electric­ity in the working environment. Proceed servicing works under the working environment where grounding works is completed.
2.4.2.1. Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.
9
2.4.2.2. Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.
10

3 Service Navigation

3.1. Service Information

This service manual contains technical information which will allow service personnel’s to understand and service this model. Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information wil l be fol lowed by supplemen t service manual to be filed with original se rvice manual.
CD Mechanism Unit (DLS6C):
1) This model uses CD Mechanism Unit (DLS6C).
Micro-processor:
1) The following components are supplied as an assembled part.
- Micro-processor IC, IC2003 (RFKWMAKX90PH)
Speaker System:
1) This model uses Speaker System, SB-AKX90PH-K.
11

4 Specifications

Q AMPLIFIER SECTION RMS output power stereo mode
Front High Ch (both channels driven)
100 W per channel (5 ), 1 kHz, 10% THD
Front Low Ch (both channels driven)
125 W per channel (4 ), 1 kHz, 10% THD
Surround Ch
125 W per channel (4 ), 1 kHz, 10% THD
Subwoofer Ch
250 W per channel (8 ), 100 Hz, 10% THD
Total RMS stereo mode power
1200 W
PMPO output power (For PR only)
13200 W
Q FM/AM TUNER, TERMINALS SECTION Preset station FM 30 stations AM 15 stations Frequency Modulation (FM)
Frequency range
87.50 to 108.00 MHz (50 kHz step)
Antenna terminal (s)
75 (unbalanced)
Amplitude Modulation (AM)
Frequency range
522 to 1629 kHz (9 kHz step)
520 to 1630 kHz (10 kHz step)
AUX Input
RCA pin jack Headphone jack Terminal Stereo,3.5 mm jack Output level (CD,1 KHz, -20dB) 32 Ω(Max) Music port (front) Sensitivity 100 mV, 4.7k Terminal Stereo.3.5 mm jack Mic jack Sensitivity 0.7 mV, 1.1k Terminal Mono, 3.5 mm jack (1 system)
Q DISC SECTION Discs played (8 cm or 12 cm)
(1) CD-Audio (CD-DA) (2) CD-R/RW (CD-DA, MP3* formatted disc) (3) MP3* *MPEG-1 layer 3,MPEG-2 Layer 3
Pick up
Wavelength 795 nm(CD) Laser Power CLASS 1 (CD)
Audio output (Disc)
Number of channels 4.2 ch (FL, FR, SL, SR, SWx2) FL = Front left channel FR = Front right channel SL = Surround left channel SR = Surround right channel SW = Subwoofer channel
Q USB SECTION USB Port
USB standard USB 2.0 full speed Media file format support MP3 (*.mp3) USB device file system FAT12, FAT16, FAT32 USB Port power 500 mA (max) Bit Rate 16kbps to 320 kbps (playback)
USB recording
Bit Rate 128 kbps / 192kbps / 320kbps USB recording speed 1x,4x (CD only) recording file format MP3 (*.mp3)
Memory section Memory
Memory size 2 GB Memory File format MP3 (*.mp3)
Memory recording
Bit Rate 128 kbps / 192 kbps / 320kbps Memory Recording speed 1x,4x (CD only) Recording file format MP3 (*.mp3) Capacity of total song recoreded 1000 song (Use 128 kbps, approximately 1 song = 4 mins)
Q GENERAL
Power supply
AC 110 to 127/220 to 240 V, 50/60 Hz
Power Consumption
158 W
Dimensions (W x H x D) 250 mm x 336 mm x 249 mm Mass 3.6 kg Operating temperature range 0 °C to +40 °C Operating humidity range 35% to 80% RH
(no condensation)
Power Consumption in st andby mode
0.3 W (Approximate)
Notes
1. Specifications are subject to change without notice. Mass and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum analyzer.
Q System: SC-AKX90PH-K
Main Unit: SA-AKX90PH-K
Speaker system: SB-AKX90PH-K
Q System: SC-AKX90PR-K
Main Unit: SA-AKX90PR-K
Speaker system : SB-AKX90PHK
12

5 Location of Controls and Components

5.1. Main Unit Key Button Operation

13

5.2. Remote Control Key Button Operation

14

5.3. Media Information

15

6 Self-Diagnostic and Special Mode Setting

6.1. Cold-Start

Here is the procedure to carry out cold-start or initialize to shipping mode.
1. Unplug AC power cord
2. Press & hold [POWER] button
3. Plug AC power cord while [POWER] button being pressed FL Display will show “_ _ _ _ _ _ _ _”
4. Release [POWER] button
16

6.2. Doctor Mode Table

6.2.1. Doctor Mode Table 1

Doctor Mode
Micro-P Version Display
Item
DescriptionMode Name
To enter into Doctor Mode
To check the firmware version for Jupiter & Microprocessor IC.
Display 1 will display for 2 secs, followed by display 2.
Display 1:
Display 2:
FL Display
Key Operation
Front Key
1.In CD Mode: Press [ ] button on main unit follow by [4] and [7] on remote control.
2.To exit, press [OK] button on remote control or press [POWER, /I] button on main unit or remote control.
In Doctor Mode:
1.Press [2] button on remote control.
Jupiter Micro-P Version
Micro-processor
Version
17

6.2.2. Doctor Mode Table 2

Cold Start
Volume Setting
Check
FL Display
Check
CD Open
Check
Item
DescriptionMode Name
To active cold start upon next AC power up when reset start is execute the next time.
To check the volume setting of a main unit.
To check the FL segment display All segment will light up while all LED blink at 0.5s,intervals.(if any)
To excute CD OPEN operation.
FL Display
Press [7]: VOLUME50 Press [8]: VOLUME35 Press [9]: VOLUME0 Press [PLAY MODE]: VOLUME30
Key Operation
Front Key
In Doctor Mode:
1. Press [DISPLAY] button on remote control.
In Doctor Mode:
1. Press [7],[8],[9], [PLAY MODE] button on remote control.
Volume
In Doctor mode:
1. Press [1] button on remote control.
In Doctor mode:
1. Press [DEL] button on remote control.
DLS6 Reliability
Test (Loading)
To determine DLS6 Open/Close operation.
In this mode, the tray will open & close.
Note: Refer to Section 6.3 Fig 1 for process flow.
In Doctor Mode:
1.Press [>10], follow by [1] and [1] buttons on remote control.
The counter will increment by one. When reach 9999 will change to 0000
18

6.3. Reliability Test Mode (CD Mechanism Unit (DLS6C))

Below is the process flow chart of the aging test for the CD Mechanism Unit (DLS6C).
OPEN Operation
OPEN wait fot 1 s
CLOSE Operation
CLOSE wait for 5s
Fig. 1. Reliability Test (Loading)
Count up
19

6.4. Self-Diagnostic Mode

20

6.5. Self-Diagnostic Error Code Table

Self-Diagnostic Function (Refer Section 6.4. Self-Diagnostic Mode) provides information on any problems occurring for the unit and its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared. The error code is automatically display after entering into self-diagnostic mode.

6.5.1. Power Supply Error Code Table

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
F61 Power Amp IC output
abnormal
F76 DCDET1 = L (NG)
Upon power on, PCNT=HIGH, DCDET2=L after checking LSI.
Press [ ] on main unit for next error.
-DEMO
F61-76 Both DCDET1 and
DCDET2 L(NG)

6.5.2. Mechanism Error Code Table (CD Mechanism Unit (DLS6C))

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks
F15 CD REST SW Abnormal
F26 Communication between
CD servo LSI and micro-p abnormal.
CD traverse position initial setting operation fail safe
time is over (10 sec) waiting for REST SW to turn on.
At the time of switching to CD function,SENSE = H shall be detected using DTMS system setting command. If the error is memorized when SENSE = L is not detected within fail safe timer time (20ms), [F26] shall be displayed simultaneously.This display shall be retained if the power is ON and at CD function. If this error occurs, CD operation afterwards shall not be executed as in the case of [NO DISC].
Press [ ] on main unit for next error.
Press [ ] on main unit for next error.
H15 CD Open SW Abnormal During normal operation
H16
CD closing SW abnormal
CD OPEN SW On fail to be detected with 3 sec.
During Closing operation,if "POS_SW_CEN" is not detected within 3 sec.
21
Press [ ] on main unit for next error.
Press [ /-DEMO]on main unit for next error.

7 Troubleshooting Guide

7.1. Troubleshooting Guide for F61 and/or F76)

This section illustrates the checking procedures when upon detecting the error of “F61” and “F76” after power up of the unit.It is for purpose of troubleshooting and chaking in SMPS,D-Amp & Main P.C.B..
Symptom Remarks
Set cannot ON 1 AC Cord 1 Faulty AC Cord, Loose connection
2 AC Inlet, P5701 2 P5701 solder crack, dry joint. 3 Fuse, F1 3 Fuse, F1 Open 4 Photocoupler 4 PC5702/PC5799 solder crack.
PC5702, PC5799 Dry joint, short circuit, open circuit. 5 Switching IC, IC5701 5 IC5701 Faulty. 6 Switching IC, IC5799 6 IC5799 Faulty.
Set can ON 1 Speaker Output 1a Faulty speaker unit, Loose connection, Short. then F61
2 D-AMP circuit
Set can ON 1 Transformer T5701 1a Short circuit between Pin 14 and Pin 15. then F76 1b Short circuit between Pin 15 and Pin 16.
2 DC-DC Circuit 2a Check cable wire connection between connector
1b Check output IC (Pin 10 & 14) which have DC Voltage
at speaker output short to Vdd/Vss.
2a D-Amp IC5000, IC5200, IC5300, IC5400 defective.
Check PWM output at pin 10, 14 of D-Amp IC. Check + VDD/SS supply at pin 4 & 20 of D-Amp IC. Check pin 1 (OSC) & pin 23 (MODE) of D-Amp IC.
Check pattern crack and solderability.
2b D-AMP IC, IC5900 defective.
(DC voltage of +/-30V detected at speaker output)
1c Short circuit between Pin 16 and Pin 17.
CN2014(At Main P.C.B) & connector CN5802
(At SMPS P.C.B)
2b Voltage regulator IC (IC2010) & DC/DC Converter IC
(IC2011) faulty.
Possible Fault(s)Checking Items
Refer to section 7.2.1 Fig.1 SMPS P.C.B..
Refer to section
7.2.3 Fig 3 D-Amp P.C.B.. Refer to section
7.2.4 Fig 4 Surround D-Amp P.C.B..
Refer to section 7.2.1 Fig.1 SMPS P.C.B..
Refer to section 7.2.2 Fig.2 Main P.C.B..
3 Photocoupler 3 PC5720 solder crack.
Set can ON 1 Rectifier D5801 1a Improper contact between D5801 to Heatsink working normally Rectifier D5802 for some time 2 Thermistor TH5860 1b Set trigger temperature protection. then F76
PC5720 dry joint, short circuit, open circuit.
Improper contact between D5802 to Heatsink
Refer to section 7.2.1 Fig.1 SMPS P.C.B..
22

7.2. Part Location

7.2.1. SMPS P.C.B.

AC Inlet: P5701
Fuse: F1
Switching IC: IC5799
Switching IC: IC5701
Transformer: T5701
Thermistor: TH5860
Photocoupler: PC5720
Fig. 1 SMPS P.C.B.
Photocoupler: PC5702, PC5799
Rectifier: D5801, D5802
Connector: CN5802
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7.2.2. Main P.C.B.

Voltage Regulator IC: IC2010
Connector: CN2014
DC/DC Converter IC: IC2011
Fig. 2 Main P.C.B.
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7.2.3. D-Amp P.C.B.

Audio Digital Power
Amp IC: IC5400
Audio Digital Power
Amp IC: IC5000
Audio Digital Power
Amp IC: IC5200
Audio Digital Power
Amp IC: IC5300
Fig. 3 D-Amp P.C.B.
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7.2.4. Surround D-Amp P.C.B.

D-Amp IC: IC5900
Fig. 4 Surround D-Amp P.C.B.
26

7.3. D-Amp IC Operation & Control

D-AMP IC Operation & Control
1) D-AMP IC (C1AB0000497) was used for this model.
2) Three control pins (signal send from micro-processor IC) were used to control the D-AMP IC operation such as muting, standby and normal operation. They are described as below: -
No Pin no Signal name Function
1 4 F_HOP Frequency Hop control. 2 6 MODE_DA Digital Amp On/Off control. 3 3 MUTE_F Digital Amp Muting control
Table 1: Digital AMP Pin Control.
Here is detailed description of the three control pins for the D-AMP IC
A) MODE_DA & MUTE_F were used to switch the D-AMP IC in the following muting status:
x L(Low/OFF): Standby / OFF x H (High/ON): Operating or Mute
Below is the logic for the two pins used for the control of the D-AMP IC.
No MODE_DA MUTE_F Digital AMP IC mode status 1 L X OFF (0V) 2 H H Mute (2.5V) 3 H L Operating(5V)
Table 2: Digital AMP IC Mode Status.
Note: Standby/OFF condition of D.AMP IC is available / activated only during the following event: Switching of Frequency Hoping, power off and start up (when the unit is undergoing the transition from standby to normal operation mode)
B) F_HOP is used to control the D-AMP operation to avoid interference with AM source by controlling the frequency source used. It will switch from one frequency to the other, depending on the tuned AM frequency.
For 9 KHz Step
AM Band Frequency F_HOP Switching Frequency
522 ~ 558 L 301 567 ~ 639 H 350 648 ~ 855 L 301 864 ~ 945 H 350
954 ~ 1152 L 301 1161 ~ 1242 H 350 1251 ~ 1449 L 301 1458 ~ 1539 H 350 1548 ~ 1629 L 301
Table 3: F_HOP Control during 9 kHz Step
For 10 KHz Step
AM Band Frequency F_HOP Switching Frequency
520 ~ 560 L 301
570 ~640 H 350 650 ~ 860 L 301 870 ~ 950 H 350
960 ~ 1160 L 301
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1170 ~ 1250 H 350 1260 ~ 1450 L 301 1460 ~ 1540 H 350 1550 ~ 1710 L 301
Table 4: F_HOP Control during 10 kHz Step
Note: During activating, the 3 control pins namely MUTE_F, MUTE_A and MODE_DA must be used to cover the “Pop” sound cause by F-HOP switching.
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8 Service Fixture & Tools

8.1. Service Tools and Equipment

Prepare service tools before process service position.
Service Tools Remarks
Main P.C.B. (CN2014) - SMPS P.C.B. (CN5802) REXX0189 (11P Cable Wire)
29

9 Disassembly and Assembly Instructions

Caution Note:
• This section describes the disassembly and/or assembly procedures for all major printed circuit boards & main compo­nents for the unit. (You may refer to the section of “Main components and P.C.B Locations” as described in the service manual)
• Before carrying out the disassembly process, please ensure all the safety precautions & procedures are followed.
• During the disassembly and/or assembly process, please handle with care as there may be chassis components with sharp edges.
• Avoid touching heatsinks due to its high temperature after prolong use. (See caution as described below)
• During disassembly and assembly, please ensure proper service tools, equipments or jigs is being used.
• During r eplacement of component parts, please refer to the section of “Replacement Parts List” as described in the service manual.
• Select items from the following indexes when disassembly or replacement are required.
• Disassembly of Top Cabinet
• Disassembly of Tuner P.C.B.
• Disassembly of Front Panel Assembly
• Disassembly of Panel P.C.B.
• Disassembly of Remote Sensor P.C.B.
• Disassembly of CD Open Button P.C.B.
• Disassembly of Jupiter P.C.B.
• Disassembly of Music Port/Headphone P.C.B.
• Disassembly of Mic P.C.B.
• Disassembly of CD Lid
• Disassembly of Main P.C.B.
• Replacement of Regulator IC (IC2010)
• Disassembly of Surround D-Amp P.C.B.
• Replacement of Audio Digital Amp IC (IC5900)
• Disassembly of D-Amp P.C.B.
• Replacement of Audio Digital Amp IC (IC5000)
• Replacement of Audio Digital Amp IC (IC5200)
• Replacement of Audio Digital Amp IC (IC5300)
• Replacement of Audio Digital Amp IC (IC5400)
• Disassembly of SMPS P.C.B.
• Replacement of Switching Regulator IC (IC5701)
• Replacement of Regulator Diode (D5702)
• Replacement of Regulator Diode (D5801)
• Replacement of Regulator Diode (D5802)
• Replacement of Regulator Diode (D5803)
• Disassembly of CD Mechanism Unit (DLS6C)
• Disassembly of Rear Panel
• Disassembly of Voltage Selector P.C.B.
• Disassembly of CD Servo P.C.B.
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