Panasonic SA-AK970GCP Diagram

Aux

CD Stereo System

SA-AK970GCP

Colour

(K)... Black Type

ORDER NO. MD0806005CE

Notes: This model’s CD mechanism changer unit is CR14C. Please refer to the original Service Manual (Order No. MD0805031CE) for this mechanism.

Specifications

AMPLIFIER SECTION

RMS output power

Front Ch (both channels driven) 250 W per channel (6 Ω), 1 kHz,

10% THD

Subwoofer Ch (2 ch) 250 W per channel (6 Ω), 100 Hz,

10% THD

otal RMS stereo mode power 1000 W

FM/AM TUNER, TERMINALS SECTION

Preset station FM 30 stations

AM 15 stations

FrequencyModulation (FM)

Frequencyrange 87.50 to 108.00 MHz

(50 kHz step)

ntenna terminal(s) 75 Ω (unbalanced)

mplitude Modulation (AM)

Frequencyrange 522 to 1629 kHz (9 kHz step)

520 to 1630 kHz (10 kHz step)

input RCA, pin jack

Music Port (Front) jack

Sensitivity 100 mV, 4.0 kΩ

Terminal Stereo, 3.5 mm jack

Headphone jack

Terminal Stereo, 3.5 mm jack

Output level (CD, 1 kHz, -20 dB) 32 Ω (Max)

Mic jack

Sensitivity 0.7 mV, 1.2 kΩ

Terminal Mono, 3.5 mm jack (1 system)

I CASSETTE DECK SECTION

Type 1way

Track system 4 track, 2 channel

Heads

Record/playback Solid permalloy head

Erasure Double gap ferrite head

Motor DC servo motor

Recording system AC bias 100 kHz

SA-AK970GCP

Erase system AC erase 100 kHz

Tape speed 4.8 cm/s

Overall frequency response (+3 dB, -6 dB) at DECK OUT

NORMAL 35 Hz to 10 kHz

S/N Ratio 50 dB (A weighted)

Wow and flutter 0.18% (WRMS)

Fast forward and rewind time Approx. 120 seconds with

C-60 cassette tape

I DISC SECTION

Disc 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 780 nm

BEAM Source Semiconductor laser

I USB SECTION

USB Port

USB standard USB 2.0 full speed

Media file format support MP3 (*.mp3)

USB device file system FAT 12/FAT 16/FAT 32

USB port power 500 mA (Max)

USB Ripping (recording)

Recording file format MP3 (*.mp3)

Bit rate 128 kbps / 192 kbps / 320 kbps

USB recording speed 1x, max 4x (CD only)

I GENERAL

Power supply AC 110 to 127/220 to 240 V,

50/60Hz

Power consumption 149 W

Dimensions (W x H x D) 250 x 331 x 334 mm

Mass 4.9 kg

Operating temperature range 0°C to +40°C

Operating humidity range 35% to 80% RH (no condensation)

Power consumption in standby mode

I SYSTEM

SC-AK970 (GCP) Music Center: SA-AK970 (GCP)

Front Speakers: SB-PF970 (GCP)

Surround Speakers: SB-PS970 (GCP)

Subwoofer 1: SB-WAK870 (GCP)

Subwoofer 2: SB-WAK970 (GCP)

For Information on speaker system, plesae refer to the original Service Manual (Order No. MD0806006CE) for SB-PF970GCP-K, (Order No. MD0806007CE) for SB-PS970GCP-K, (Order No. MD0806008CE) for SB-WAK970GCP-K & (Order No. MD0806004CE) for SB-WAK870GCP-K.

This model uses CR14C mechanism (CD changer mechanism)

Note:

1. Specifications are subject to change without notice. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

0.5 W (approx.)

CONTENTS

Page Page

1 Safety Precautions

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

3 Precaution of Laser Diode

4 Handling Precautions for Traverse Unit

5 Handling the Lead Free Solder

6 Operation Procedures

7 Self diagnosis and special mode setting

8 Assembling and Disassembling

9 Disassembling and Assembling of CD Mechanism Unit

10 Service Fixture and Tools

11 Service Position

12 Procedure for Checking Operation of Individual Parts of Deck

Mechanism Unit

13 Measurement And Adjustments

14 Voltage Measurement & Waveform Chart

15 Wiring Connection Diagram

16 Block Diagram

17 Notes Of Schematic Diagram

18 Schematic Diagram

19 Printed Circuit Board

20 Illustration of IC’s, Transistors and Diodes

21 Terminal Function of IC’s

22 Exploded Views

23 Replacement Parts List

113

121

122

125

129

SA-AK970GCP

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, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, check for leakage current checks to prevent from being expose d 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. Using an ohmmeter measure the resistance value, 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 1MΩ and 5.2Ω. 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 1.5kΩ, 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 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. should the measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned to the customer.

Fig. 1

SA-AK970GCP

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 or 120V, set to the “127V” 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, discharge unit AC Capacitors as such C5700, C5701, C5703, C5704, C5705, C5706 and C5707 through a10Ω, 1W 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 110-127V / 220-240V, at 50/60Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~500 mA.

1.4. 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.

1.5. Safety Part Information

Safety Parts List:

There are special components used in this equipment which are important for safety.These parts are marked by Schematic Diagrams & Replac ement 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.

Table 1

Reference No. Part No. Part Name & Description Remarks 18 RGRX0070J-A REAR PANEL [M] A2 K2CQ2CA00007 AC CORD [M] P5701 K2AA2B000017 AC INLET [M] T5701 ETS48AB116AC MAIN TRANSFORMER [M] T5751 ETS19AB256AG SUB TRANSFORMER [M] F1 K5D802BNA005 FUSE [M] L5702 ELF22V035B LINE FILTER [M] S5701 K0ABCA000007 SW VOLTAGE SELECTOR [M] DZ5701 ERZV10V511CS ZENER [M] FP2901 K5G4013A0001 FUSE PROTECTOR [M] 36 RKMX0144-K TOP CABINET [M] PC5701 B3PBA0000402 PHOTO COUPLER [M] PC5702 B3PBA0000402 PHOTO COUPLER [M] PC5720 B3PBA0000402 PHOTO COUPLER [M] PC5799 B3PBA0000402 PHOTO COUPLER [M] PCB2 REPX0622G SMPS P.C.B. [M] (RTL) PCB8 REPX0622G AC INLET P.C.B. [M] (RTL) PCB13 REPX0622G VOLTAGE SELECTOR P.C.B. [M] (RTL) 51 RMZ0339 ZENER COVER [M] 68 REXX0686 WHITE WIRE (VOLTAGE SELECTOR) [M] 69 REXX0687 BLUE WIRE (VOLTAGE SELECTOR) [M]

in the

Reference No. Part No. Part Name & Description Remarks 89 REZX0024 RED WIRE [M] 90 REZX0023 BLACK WIRE [M] C5701 F0CAF334A087 AC CAPACITOR [M] C5704 F1BAF1020020 AC CAPACITOR [M] C5705 F1BAF1020020 AC CAPACITOR [M] C5700 F1BAF1020020 AC CAPACITOR [M] C5707 F1BAF1020020 AC CAPACITOR [M] C5706 F1BAF1020020 AC CAPACITOR [M] C5703 F0C2H1040001 AC CAPACITOR [M] 340 RAEX0190A-V TRAVERSE UNIT (W/O CD SERVO P.C.B) [M] TH5860 D4CC11040013 THERMISTOR [M] TH5702 D4CAC8R00002 THERMISTOR [M] T2900 G4D1A0000117 SWITCHING TRANSFORMER [M]

SA-AK970GCP

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by 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 inciden ce of component damage caused by electro static discharge (ESD).

1. Immediately before handlin g any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your body by touchin g 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 applyin g power to the unit under test.

2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as aluminium foil, to prevent electrostatic charge build up 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 remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge 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, aluminium 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 body motions when handlin g 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) sufficient to damage an ES device).

3 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: 780 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 expose d 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.

SA-AK970GCP

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 body. Special care must be taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.

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

The laser diode in the optical pickup unit 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.

4.2. Grounding for electrostatic breakdown prevention

Some devices such as the CD 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.

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.

4.2.2. Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity form your body.

SA-AK970GCP

5 Handling the Lead Free Solder

5.1. General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting process of all electrical components 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 mainly 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) equipped with the temperature control after setting the temperature 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%

6 Operation Procedures

6.1. Main Unit Key Buttons Operation

SA-AK970GCP

6.2. Remote Control Key Buttons Operation

6.3. Disc Information

6.4. Using the Music Port and Connecting & Playing a USB Mass Storage Class Device

SA-AK970GCP

7 Self diagnosis and special mode setting

This unit is equipped with features of self-diagnostic & special mode setting for checking the functions & reliability.

Special Note : Checking of the reliability (ageing) & changer operation must be carry out to ensure good working condition in unit.

7.1. Service Mode Summary Table

The service modes can be activated by pressing various button combination on the main unit and remote control unit.Below is the summary for the various modes for checking:

Player buttons Remote control unit buttons Application Note

[STOP] [4], [7] Entering into doctor mode (Refer to section .7.2.1. service mode

[STOP] [ ] Entering into service mode (Refer to section .7.2.1. service mode

Mode Remote control unit buttons Application Note

In Doctor Mode [1] FL all segment & LED inspection (Refer to section .7.2.2. service mode

[7] Volume 50 setting check (Refer to section .7.2.2. service mode

[8] Volume 29 setting check (Refer to section .7.2.2. service mode

[9] Volume 0 setting check (Refer to section .7.2.2. service mode

[2] Micro-P Version Display (Refer to section .7.2.2. service mode

[4] CD→USB Recording & Playing inspection (Refer to section .7.2.2. service mode

[5] CD-MP3 Reading & Playing inspection (Refer to section .7.2.2. service mode

[DISC] CR14 inspection (Refer to section .7.2.2. service mode

Table 1 for more information.)

Table 2 for more information.)

Mode Remote control unit buttons Application Note

In Service Mode [1] self diagnostic history (Refer to section .7.2.3. service mode

[2] Micro-P FW (Refer to section .7.2.3. service mode

[3] Cold Start (Reset) (Refer to section .7.2.3. service mode

Table 3 for more information.)

7.2. Service Mode Table

Below is the various special modes for checking:-

7.2.1. Service Mode Table 1

Item FL Display Key Operation

Mode Name Description Front Key

Doctor Mode To enter into Doctor

Mode.

Service Mode To enter into Service

Mode.

In any mode:

1. Press [ follow by [4] and [7] on remote control.

To exit Doctor Mode, press [ main unit or remote control.

1. Select [CD] for DISC mode (Ensure no disc is inserted).

2. Press and hold [ main unit for 2 seconds follow by [ remote control.

To exit, press [ remote control.

] button on main unit

] button on

]button on

] button on main unit or

]on

SA-AK970GCP

7.2.2. Service Mode Table 2

Item FL Display Key Operation

Mode Name Description Front Key

FL Display Test To check the FL

segments display (All segments will light up)

In doctor mode:

1. Press [1] button on remote control.

To exit Doctor Mode, press [ main unit or remote control.

] button on

Volume Setting Mode

Micro-P Version Display

To check for the volume setting of the main unit. The volume will be automatically set to its respective level (in dB). During this mode, treble/bass/EQ will be set to ‘0’dB & OFF.

Checking of various items and firmware version.

Note: The microprocessor version as shown is an example. It will be revise when there is an updates.

Display 1 In doctor mode:

1. Press [7] button on remote control. To exit Doctor Mode, press [ main unit or remote control.

Display 1 In doctor mode:

2. Press [8] button on remote control. To exit Doctor Mode, press [ main unit or remote control.

Display 1 In doctor mode:

3. Press [9] button on remote control. To exit Doctor Mode, press [ main unit or remote control.

In doctor mode:

1. Press [2] button on remote control.

To exit Doctor Mode, press [ main unit or remote control.

] button on

CD→USB Recording & Playing inspection

CD-MP3 Reading & Playing inspection

To check for the CD→USB Recording setting of the main unit. The volume will be automatically set to its respective level (in dB). During this mode, treble/bass/EQ will be set to ‘0’dB & OFF.

To check for the CD-MP3 Reading setting of the main unit. The volume will be automatically set to its respective level (in dB). During this mode, treble/bass/EQ will be set to ‘0’dB & OFF.

(For more information, refer to section 7.2.4)

In doctor mode:

1. Press [4] button on remote control.

To exit Doctor Mode, press [ main unit or remote control.

In doctor mode:

1. Press [5] button on remote control.

To exit Doctor Mode, press [ main unit or remote control.

] button on

Item FL Display Key Operation

Mode Name Description Front Key

CR14 inspection CR14 inspection

operation:

1. Load TRAY 1 (Move to PLAY position)

2. After that, TRAY 2 is open (TRAY 1 still in LOAD condition) and close.

3. Next TRAY 3 is open (TRAY 1 still in LOAD condition) and close.

4. Then TRAY 4 is open (TRAY 1 still in LOAD condition) and close.

5. Finally TRAY 5 is open (TRAY 1 still in LOAD condition) and close.

6. Tray 1 is unloaded. (Move to the STOCK position)

7. Tray 1 is loaded. (Move to the PLAY position)

When step 1 to 7 operates normally without any error, FL will display [CHGR_OK_]

If operation without any error

If operation with error

If NG, please refer to the original service manual of changer unit CR14C.

In doctor Mode:

1. Press [DISC] button on remote control.

To exit Doctor Mode, press [ main unit or remote control.

SA-AK970GCP

] button on

7.2.3. Service Mode Table 3

Item FL Display Key Operation

Mode Name Description Front Key

Self Diagnostic History

Micro-P Version Display

Checking the records for self-diagnostic.

Checking of various items and firmware version.

Note: The microprocessor version as shown is an example. It will be revise when there is an updates.

FL Display sequenceDisplay [

In service mode:

1. Press [1] button on remote control.

To exit Service Mode, press [ main unit or remote control. To clear history, press & hold [0] for 5 seconds or more.

(Display 1)

]

(Display 2)

In service mode:

1. Press [2] button on remote control.

To exit Service Mode, press [ main unit or remote control.

] button on

Cold Start (Reset) To activate cold start

ipon next AC power up.

In service mode:

1. Press [3] button on remote control.

To exit Service Mode, press [ main unit or remote control.

] button on

SA-AK970GCP

7.2.4. CD-MP3 Reading & Playing inspection

Purpose : CD-MP3 Readin g & Playing test.

Below is the procedures for this mode.

Step 1 : Enter into Doctor mode. (For more information refer to section 7.1 on key operation to enter into this mode)

Step 2 : Insert CD with MP3 tracks. (Ensure correct MP3 tracks is loaded)

Step 3 : Press [5] button on remote control. Execute MP3 Disc Check (Refer Flowchart below)

Result display :

• Displayed if MP3 test OK

• Displayed if MP3 test NG

7.3. Error code Table Display

Self-Diagnosis Function (refer Section “7.2.1 Service Mode Table 1”) provides information on any problems occuring for the unit and its respective components by display ing 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.

7.3.1. Error Code Table (For Deck Mechanism)

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

H01 Mode SW, plunger

and capstan motor abnormal

H02 Rec INH SW

abnormal

H03 HALF SW abnormal For deck mechanism unit.

Normal operation during mecha transition, MODE SW abnormal is memorized. The content of abnormality can be confirmed in the abnormal detection mode explained in the later section.

The content of abnormality can be confirmed in the abnormal detection mode explained in the later section.

For deck mechanism unit. Press [ next error.

Press [ next error.

] on main unit for

SA-AK970GCP

F01 Reel pulse abnormal For deck mechanism unit.

F02 TPS abnormal For deck mechanism unit.

Press [ next error.

] on main unit for

7.3.2. Error Code Table (For CD Mechanism Unit)

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

LOAD Load operation faulty The load operation does

UNLD Unload operation

faulty

UP Exchange open

operation faulty

DOWN Down operation faulty The down operation does

OPEN Open operation faulty The open operation does

CLOSE Close operation faulty The close operation does

not complete after fail-safe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

The unload operation does not complete after fail-safe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

The exchange open operation does not complete after fail-safe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

not complete after fail-safe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

For CD Mechanism unit (CR14C). Press [EXCHANGE] on main unit for next error.

SA-AK970GCP

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

MODEL Mode change to

updown operation faulty

MODEH Mode change to

horizontal operation faulty

INITIALIZE Initialize operation

faulty

The mode change to up/down operation does not complete after fail-safe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

The mode change to horizontal operation does not complete after fail-safe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

The initialize operation does not complete after failsafe mode has time-out. The checking operation repeats and this error code appears after the second time-out occurs.

7.3.3. Error Code Table (For Power Supply)

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

F61 Power Amp IC output

abnormal

Upon power on, PCNT=HIGH, DCDET2=L after checking LSI.

For CD Mechanism unit (CR14C). Press [EXCHANGE] on main unit for next error.

For power. Press [ next error.

] on main unit for

F76 DCDET1 = L (NG)

F61-76 Both DCDET1 and

DCDET2 “L“ (NG)

SA-AK970GCP

8 Assembling and Disassembling

“ATTENTION SERVICER”

Be careful when disassembling and servicing.

Some chassis components may have sharp edges.

Special Note:

1. This model uses a CD changer mechanism unit (CR14C). In this following section does not contain the necessary assembly and disassembly information except the assembly and disassembly of the traverse unit. Kindly refer to the original service manual for the CD changer mechanism unit. (Order No. MD0805031C E).

2. This section describes the disassembly procedures for all the major printed circuit boards and main components.

3. Before the disassembly process was carried out, do take special note that all safety precautions are to be carried out.

(Ensure that no AC power supply is connected during disassembling.)

4. For assembly after operation checks or replacement, reverse the respec tive procedures.

Special reassembly procedures are described only when required.

5. Do take note of the locators on each printed circuit board during reassembling procedures.

6. The Switch Regulator IC may have high temperature after prolonged use.

7. Use caution when removing the top cabinet and avoid touching heat sinks located in the unit.

8. Select items from the following index when checks or replacement are required.

• Disassembly of Top Cabinet

• Disassembly of Mechanism Unit (CR14C)

• Disassembly of Jupiter USB P.C.B.

• Disassembly of Fan Unit

• Disassembly of Rear Panel

• Disassembly of Front Panel Unit

• Disassembly of Mic P.C.B.

• Disassembly of Panel P.C.B., Tact Switch P.C.B., Remote Sensor P.C.B., Side Bar (L) Led P.C.B. and Side Bar (R) Led

P.C.B.

• Disassembly of USB Connector/Led P.C.B.

• Disassembly of Music Port P.C.B.

• Disassembly of Level Meter (L) Led P.C.B. and Level Meter (R) Led P.C.B.

• Disassembly of CD Lid

• Disassembly of Deck Mechanism Unit

• Disassembly of Deck P.C.B.

• Disassembly of Deck Mechanism

• Disassembly of Deck Mechanism P.C.B.

• Disassembly of Cassette Lid

• Rectification for Tape Jam Problem

• Disassembly of Traverse Unit

• Disassembly of D-Amp P.C.B.

• Replacement of Audio Digital Amp IC (IC5400)

• Replacement of Audio Digital Amp IC (IC5000)

• Replacement of Audio Digital Amp IC (IC5200)

• Replacement of Audio Digital Amp IC (IC5300)

• Disassembly of Main P.C.B.

SA-AK970GCP

• Replacement of Voltage Regulator IC (IC2761)

• Replacement of Switch Transistor (Q2751)

• Disassembly of SMPS P.C.B.

• Replacement of Switch Regulator IC (IC5701)

• Replacement of Switch Regulator Diode (D5702)

• Replacement of Regulator Diode (D5801)

• Replacement of Regulator Diode (D5802)

• Replacement of Regulator Diode (D5803)

• Disassembly of AC Inlet P.C.B.

• Disassembly of Voltage Selector P.C.B.

SA-AK970GCP

8.1. Disassembly flow chart

The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing.

To assemble the unit, reverse the steps shown in the chart below.

SA-AK970GCP

8.2. Main Parts Location Diagram

8.3. Disassembly of Top Cabinet

Step 1 : Remove 3 screws on Top Cabinet (R) side.

SA-AK970GCP

Step 5 : Push the Top Cabinet backwards to release the catches.

Step 6 : Lift up the Top Cabinet and remove it in the direction of arrow.

Step 2 : Remove 3 screws on Top Cabinet (L) side.

8.4. Disassembly of Mechanism Unit (CR14C)

• Follow the (Step 1) - (Step 6) of Item 8.3

Step 1 : Remove 1 screw at Rear Panel.

Step 3 : Remove 5 screws at the Rear Panel.

Step 4 : Lift the both sides of Top Cabinet outwards in the

direction of arrow.

SA-AK970GCP

Step 8 : Release catches at both sides.

Special Note : During reassembling procedure, ensure both

the claws and catches are fully catched. Assembly is secured upon hearing a click sound.

Step 9 : Release the Tabs at the bottom of the Front Panel.

Step 2 : Detach 22P FFC cable at connector (CN2801) at Main

P.C.B..

Step 3 : Detach 11P FFC cable at connector (CN2802) at Main P.C.B..

Step 4 : Detach 6P FFC cable at connector (CN2815) at Main P.C.B..

Step 5 : Detach 20P FFC cable at connector (CN2804) at Main P.C.B..

Step 6 : Detach 5P cable at connector (CN1113) at Main P.C.B..

Caution: Do not exert strong force when releasing the tabs.

Step 10 : Shift the Front Panel slightly forward in the direction

of arrows.

Step 7 : Release the claws outwards on both sides.

Step 11 : Lift up the Mechanism Unit (CR14C).

• Disassembly of Mecha Chassis

SA-AK970GCP

Step 1 : Remove 2 screws.

Step 2 : Remove Jupiter USB Unit in the direction of arrow.

Step 12 : Remove 2 screws.

Step 13 : Remove the Mecha Chassis as arrow shown.

Note: For disassembly & assembly of traverse unit, please

refer to original Service Manual of the Disassembly and Assembly of the Mechanism Unit (CR14C).

8.5. Disassembly of Jupiter USB P.C.B.

• Follow the (Step 1) - (Step 6) of Item 8.3

• Follow the (Step 1) - (Step 11) of Item 8.4

Step 3 : Release all the catches.

Step 4 : Remove Jupiter USB Cover in the direction of arrow.

Step 5 : Desolder 4 points.

Step 6 : Remove Jupiter USB P.C.B..

Note: During reassembling procedures, ensure 4 points is solder onto Jupiter USB P.C.B..

8.6. Disassembly of Fan Unit

• Follow the (Step 1) - (Step 6) of Item 8.3

SA-AK970GCP

Step 1 : Detach 2P cable at connector (CN2810) on Main P.C.B.

Step 3 : Remove 1 screw at the Rear Panel.

Step 4 : Slight lift up the Fan Unit as arrow shown.

Step 5 : Remove the Fan Unit.

Step 2 : Remove 2P cable from the Hook.

Note: During reassembling procedures, ensure wire are properly dressed in the Hook.

SA-AK970GCP

8.7. Disassembly of Rear Panel

• Follow the (Step 1) - (Step 6) of Item 8.3

• Follow the (Step 1) of Item 8.6

Step 1 : Remove 10 screws at Rear Panel.

Step 2 : Slight lift up and remove the Voltage Selector as arrow

shown.

Step 3 : Slightly lift up the Mechanism Unit (CR14C) from the 2 Locators.

SA-AK970GCP

Step 4 : Release 2 catch from the Side Panel.

Step 5 : Remove the Rear Panel.

Step 5 : Detach 2P cable at connector (CN2001) on Main

P.C.B..

Step 6 : Detach 5P cable at connector (CN1113) on USB Connector/Led P.C.B..

8.9. Disassembly of Mic P.C.B.

• Follow the (Step 1) - (Step 6) of Item 8.3

• Follow the (Step 7) - (Step 10) of Item 8.4

• Follow the (Step 1) - (Step 6) of Item 8.8

8.8. Disassembly of Front Panel Unit

• Follow the (Step 1) - (Step 6) of Item 8.3

• Follow the (Step 7) - (Step 10) of Item 8.4

Step 1 : Remove Mic Knob.

Step 2 : Remove 2 screw.

Step 1 : Detach 27P FFC cable at connector (CN2806) on

Main P.C.B..

Step 2 : Detach 2P cable at connector (CN112) on Main P.C.B..

Step 3 : Detach 21P FFC cable at connector (CN2011) on Main P.C.B..

Step 4 : Detach 10P FFC cable at connector (CN2807) on Main P.C.B..

Step 3 : Release 1 catch.

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