Panasonic SAAK-960-P Service manual

CD Stereo System

SA-AK960P

Colour

(K)... Black Type

ORDER NO. MD0808002CE

Notes: This model’s CD mechanism changer unit is CRS1. Please refer to the original Service Manual (Order No. MD0509368C0) for this mechanism.

Specifications

AMPLIFIER SECTION

RMS output power

Front Ch 200 W per channel (7 Ω), 1 kHz,

10% THD

Subwoofer Ch 240 W per channel (7 Ω), 100 Hz,

10% THD

otal RMS Dolby Digital mode

power

FTC Output Power Stereo mode

Front Ch (both ch driven) 190 W per channel (7 Ω), 100 to

12 kHz, 10% THD

Subwoofer Ch 220 W per channel (7 Ω), 40 to

100 Hz, 10% THD

otal FTC Stereo mode power 820 W

FM/AM TUNER, TERMINALS SECTION

Preset station FM 20 stations

FrequencyModulation (FM)

Frequencyrange 87.9 to 107.9 MHz

880 W

AM 15 stations

(200 kHz step)

Sensitivity 4.0 µV (IHF)

S/N 26 dB 2.2 µV

Antenna terminal(s) 75 Ω (unbalanced)

Amplitude Modulation (AM)

Frequency range 520 to 1710 kHz (10 kHz step)

Phone jack

Terminal Stereo, 3.5 mm (1/8”) jack

MIC jack

Sensitivity 0.7 mV, 1.2 kΩ

Terminal Mono, 3.5 mm (1/8”) jack (1

Music Port (Front)

Sensitivity 100 mV, 4.7 kΩ

Terminal Stereo, 3.5 mm (1/8”) jack

USB Port

USB standard USB 2.0 full speed

87.5 to 108.0 MHz (100 kHz step)

system)

SA-AK960P

Media file format support MP3 (*.mp3)

USB device file system FAT12, FAT16, FAT32

USB port power 500 mA (Max)

I CASSETTE DECK SECTION

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

Erase system AC erase 100 kHz

Tape speed 4.8cm/s(1-7/8ips)

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

Normal 35 Hz to 14 kHz

S/N Ratio 50 dB (A-WTD)

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 (3”) or 12 cm (5”)]

(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 785 nm

Laser power CLASS 1

Audio output (Disc)

Number of channels (FL, FR, SL, SR, SW) 4.2 ch

Audio performance (measurement at: CD out terminal)

Frequency response (CD-Audio) 4Hzto20kHz

S/N ratio (CD-Audio) 95 dB

Dynamic range (CD-Audio) 93 dB

Total harmonic dist. (CD-Audio) 0.005%

I GENERAL

Power supply AC 120 V, 60 Hz

Power consumption 240 W

Dimensions (W x H x D) 250 x 331.5 x 358 mm (9-7/8” x

13-1/16” x 14-1/8”)

Mass 8.3 kg (18.3 lb)

Operating temperature range 0°C to +40°C (+32°F to +104°F)

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

Power consumption in standby mode

I SYSTEM

SC-AK960 (P) Music center: SA-AK960 (P)

Front speakers: SB-PF960 (GCP)

Surround speakers: SB-PS960 (GCP)

Subwoofer 1: SB-WAK860 (GCP)

Subwoofer 2: SB-WAK960 (GCP)

For Information on speaker system, plesae refer to the original Service Manual (Order No. MD0707024CE) for SB-PF960G CP-K, (Order No. MD0707025CE) for SB-PS960GCP-K, (Order No. MD0707026CE) for SB-WAK960GCP-K & (Order No. MD0707022CE) for SB-WAK860GCP-K.

This model uses CRS1 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.

0.2 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 Service Fixture and Tools

10 Service Position

11 Adjustment Procedures

12 Voltage Measurement & Waveform Chart

13 Wiring Connection Diagram

14 Block Diagram

15 Notes Of Schematic Diagram

16 Schematic Diagram

17 Printed Circuit Board

18 Illustration of IC’s, Transistors and Diodes

19 Terminal Function of IC’s

20 Exploded Views

21 Replacement Parts List

107

108

111

115

SA-AK960P

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.

(This “Safety Precaution” is applied only in U.S.A.)

1. Before servicing, unplug the power cord to prevent an electric shock.

2. When replacing parts, use only manufacturer’s recommended components for safety.

3. Check the condition of the power cord. Replace if wear or damage is evident.

4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the customer from being exposed to a shock hazard.

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-AK960P

1.2. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C5171, C5172, C5920, C5940, C5950, C5101 and C5104 through a 10Ω, 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 120 V, 60 Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~1000 mA.

1.3. 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.

1.4. 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 11 RGRX0068E-A REAR PANEL [M] A2 K2CB2CB00021 AC CORD [M] JK5950 K2AA2B000007 AC INLET [M] T5950 G4CYAYY00186 MAIN TRANSFORMER [M] T5951 G4C2AAJ00005 BACK UP TRANSFORMER [M] F1 K5D802APA008 FUSE [M] L5950 ELF15N035AN LINE FILTER [M] RL5950 K6B1AEA00003 POWER RELAY [M] Z5950 ERZV10V511CS ZENER [M] FP5950 K5G402AA0002 FUSE PROTECTOR [M] 31 RKMV0071A-KJ TOP CABINET [M] 360 RAE0165A-V TRAVERSE [M] PCB7 REPX0610B TRANSFORMER P.C.B. [M] (RTL) R5950 ERC12UGK335D 3.3M 1/2W [M]

in the

SA-AK960P

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 handling 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).

SA-AK960P

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: 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.

SA-AK960P

4 Handling Precautions For Traverse Unit

The laser diode in the traverse uint may break down due to potential difference caused by the static electricity of clothes or our human body.

So, be careful of electrostatic breakdown during repair of the traverse unit.

• Way of handling the traverse unit

1. Do not subject the traverse unit to static electricity as it is extremely sensitive to electrical shock.

2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board).

3. Do not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job in as short time as possible.

4. Do not turn the variable resistor for laser power adjustment. (It is pre-adjusted during production time)

Fig 4.1

Grounding for electrostatic breakdown preven tion

1. Human body grounding

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

2. Work table grounding

Put a conductive material (sheet) or steel sheet on the area where the traverse unit is place, and ground the sheet.

Caution :

The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse unit.

Caution when replacing the Traverse Unit

The traverse unit has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections.

SA-AK960P

Fig 4.2

SA-AK960P

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%

SA-AK960P

6 Operation Procedures

6.1. Main Unit Key Buttons Operation

6.2. Remote Control Key Buttons Operation

6.3. Disc Information

SA-AK960P

6.4. Using the Connecting to a portable audio equipment, other external unit and Playing a USB Mass Storage Class Device

SA-AK960P

7 Self diagnosis and special mode setting

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

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 button Remote control button unit Application Note

[ ]

[ ] [4], [7] Entering into Doctor Mode Refer to the section,

In Doctor Mode [4] Set for cold start when reset start is executed the next time Refer to the section,

]

Mode Remote control button unit Application Note

-- Entering into Self-Diagnostic Mode Refer to the section,

[Muting] Clock Setting Refer to the section,

[0] Tape Eject Test Refer to the section,

[DIMMER] All segment display for the FL Refer to the section,

[DISC] CRS1 Inspection Refer to the section,

[7] Volume 50 Setting check Refer to the section, [8] Volume 41 Setting check [9] Volume 35 Setting check

“7.2.1 Service Mode Table 1 for more information.

“7.2.2 for more information.

7.2. Service Mode

7.2.1. Service Mode Table 1

Item FL Display Key Operation

Mode Name Description Front Key

Self -Diagnostic Mode

To enter into self diagnostic checking for main unit.

1. Select [TAPE, ] for TAPE mode (Ensure

2. Press and hold [STOP, I] button follow by

To exit, press [ unit or remote control.

no TAPE inserted).

[

, POWER] button on main

Item FL Display Key Operation

Mode Name Description Front Key

Doctor Mode To enter into Doctor

Mode for checking of

(Display 1)

In CD Mode:

1. Press [STOP, I] button on main unit follow various items and displaying EEPROM and firmware version.

Note: The micro-

To exit, press [ENTER] button on remote control or press [ unit or remote control.

processor version as shown is an example. It will be revise when there is an updates.

SA-AK960P

by [4] and [7] on remote control.

, POWER] button on main

FL display sequence Display 1 → 2

1. The Check Sum of EEPROM and firmware version will be display

* ROM correction. ** Firmware version No:

checksum : (Condition 1)

(a) If there is NO EEPROM header string OR (b) If there is no EEPROM ( no data is

received by micro-processor) [NO] is displayed.

checksum : (Condition 2)

If the version of the EEPROM does not match or not working properly [NG] is display.

checksum : (Condition 3)

If the EEPROM version matches, checksum [YYYY] is displayed.

(Display 2)

SA-AK960P

7.2.2. Service Mode Table 2

Item FL Display Key Operation

Mode Name Description Front Key

Cold Start To activate cold start

upon next AC power up.

In doctor mode:

1. Press [4] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

, POWER] button on main

Clock Setting Check

Tape Eject Test To check on the tape

FL Display Test To check the FL

CRS1 inspection CRS1 inspection

Volume Setting To check for volume

To indicate that a clock time was set properly.

eject function (For deck 1/2)

segments display (All segments will light up and LED will blink at 0.5 second interval)

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

4. Load TRAY 5 (Move to PLAY position)

5. Tray 5 is unloaded. (Move to the STOCK position)

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

When step 1 to 6 operates normally without any error, FL will display

OK]

[CHG

setting during this mode.

If operation without any error

If operation with error

If NG, please refer to the original service manual of changer unit CRS1.

Display 1 In doctor mode:

In doctor mode:

1. Press [MUTING] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

In doctor mode:

1. Select [TAPE, no TAPE inserted).

2. Press [0] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

In doctor mode:

1. Press [DIMMER] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

In doctor Mode:

1. Press [DISC] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

1. Press [7] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

, POWER] button on main

] for TAPE mode (Ensure

, POWER] button on main

Display 1 In doctor mode:

2. Press [8] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

Display 1 In doctor mode:

3. Press [9] button on remote control.

To exit, press [ENTER] button on remote control or press [ unit or remote control.

, POWER] button on main

7.2.3. Service Mode Table 3

Item FL Display Key Operation

Mode Name Description Front Key

CD Changer Reliability Test (CRS 1)

To determine the reliability of CD Loading Unit. (For more information, refer to section 7.2.4)

In Self-Diagnostic mode:

1. Select [CD,

2. Press [

To exit, press [ unit or remote control. (The tray will return to PLAY position and then power off)

SA-AK960P

/ ] for CD mode.

] button.

, POWER] button on main

CD Test Mode Checking of CD

CD Auto Adjustment

Service Mode (For traverse unit)

Operation.

To check the CD auto adjustment result for FLOCK, TLOCK and CLVS. FLOCK: Focus Lock. TLOCK: Traverse Lock. CLVS: Constant Linear Velocity Speed.

To unlock the traverse unit for service. FL display sequence Display 1 → 2

(Display 1)

(Display 2)

In CD mode:

1. Select [CD,

2. Press and hold [STOP, I] button for 3 seconds follow by [

To exit, press [ unit or remote control.

In CD Test mode:

1. Press [0] button on remote control.

To exit, press [ unit or remote control.

In TAPE mode:

1. With no cassette tape inserted.

2. Press [STOP, I], [ unit.

3. Press [SINGLE CHANGE] on main unit.

To exit, press [ unit or remote control.

/ ] for CD mode.

, POWER] button on main

] button on main

, POWER] button on main

7.2.4. Reliability Test Mode (CRS1 Mechanism)

Below is the process flow chart of ageing for the CD changer unit. (CRS1)

SA-AK960P

7.3. Error code Table Display

Self-Diagnosis Function (refer Section 7.2) 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 switch

abnormal (Plunger and capstan motor)

H02 REC_INHFswitch

abnormal

H03 HALF switch

abnormal

Detection of switch for “On” when the deck mechanism is in the driving mode. Detection time at 1.6ms in 6 times interval

Detection of switch for presence of the FORWARD recording tab when a cassette is loaded into the deck. Detection time is 20ms at 2 times interval.

Detection of switch for "ON" state when a casstte is loaded into the deck. Detection time is 20ms at 2 times interval. When no cassette is loaded, it shall be in "OFF" state

For Deck Mechanism Unit (Deck 1/2) Press [ next error. To exit, press [POWER] button on main unit. Normal operation shall executed upon next powering on of the main unit.

] on main unit for

SA-AK960P

Error Code Diagnosis Contents Description of error Automatic FL Display Remarks

F01 Reel pulse abnormal Detection of switch for the

reel pulse signal toggling between high and low.

F02 TPS abnormal Tape position detection

signal. It is abnormal condition when the tape ends before the checking is completed

7.3.2. Error Code Table For CD Changer Block

For Deck Mechanism Unit (Deck 1/2) Press [ next error. To exit, press [POWER] button on main unit. Normal operation shall executed upon next powering on of the main unit.

] on main unit for

SA-AK960P

7.3.3. Error Code Table For Power Supply

7.3.4. CRS1 Error Code display

CRS1 Error Code display

1. The errors that occured in CRS1 Mechanism can be recalled and displayed, in the order of the occurence under self-diagnostic for procedures to enter this mode.

• Only the first 5 errors will be memorized (in backup memory). The subsequence error shall be ignored and not memorize.

For system with EEPROM as memory backup,memory space in EEPROM is neccesary.

2. To display all error code memorized

In CRS1 Self-Diagnostic mode, press [SINGLE CHANGE] to display subsequence error code.

It shall repeat after reaching error no. 5.

e.g.:

[1____IHMS]→ [SINGLE CHANGE]

[2____ITOP]→ [SINGLE CHANGE]

[3____HOME]→ [SINGLE CHANGE]

[4____LOAD]→ [SINGLE CHANGE]

[5_____UDD]→ [SINGLE CHANGE]

3. To clear the error code memory

In CRS1 Self-Diagnostic mode, long press [SINGLE CHANGE] key (2s or more)

SA-AK960P

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 (CRS1). 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. MD0509368C 0).

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 CD Changer Unit (CRS1)

• Disassembly of Subwoofer Interface P.C.B.

• Disassembly of Rear Panel

• Disassembly of Transformer P.C.B.

• Disassembly of Main P.C.B.

• Disassembly of Sub Power P.C.B.

• Replacement of Regulator IC (IC5101)

• Replacement of Regulator Transistor (Q5111)

• Replacement of Regulator Transistor (Q5112)

• Replacement of Regulator Transistor (Q5105)

• Replacement of Regulator Transistor (Q5106)

• Disassembly of Power P.C.B.

• Replacement of Digital-Amp IC (IC5300)

• Replacement of Digital-Amp IC (IC5200)

• Replacement of Digital-Amp IC (IC5000)

• Replacement of Digital-Amp IC (IC5400)

• Disassembly of Front Panel

• Disassembly of USB P.C.B.

• Disassembly of Panel P.C.B., Remote Sensor P.C.B. & Sub Panel P.C.B.

• Disassembly of Deck Mechanism Unit

• Disassembly for Deck P.C.B.

• Disassembly of Deck Mechanism

• Disassembly of Deck Mechanism P.C.B.

• Disassembly of Traverse Unit

• Disassembly CD Lid

• Disassembly Cassette Lid

• Rectification for Tape Jam Problem

SA-AK960P

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.

8.2. Main Parts Location Diagram

SA-AK960P

8.3. Disassembly of Top Cabinet

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

Step 5 : Push the Top Cabinet backwards to release the

catches.

Step 6 : Remove Top Cabine t.

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

Step 3 : Remove 5 screws.

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

8.4. Disassembly of CD Changer Unit (CRS1)

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

SA-AK960P

Step 1 : Remove 1 screw at Rear Panel.

Step 2 : Release the claws outwards on both ends.

Step 4 : Detach 22P FFC cable at connectors (CN2801) on

Main P.C.B..

Step 5 : Detach 3P cable at connector (CN2812) on Main P.C.B..

Step 6 : Detach 14P FFC cable at connectors (CN2805) on Main P.C.B..

Step 7 : Remove CD changer unit (with chassis).

• Disassembly of Mecha Chassis

Step 3 : Lift up the CD Changer Unit (CRS1) upwards.

Step 8 : Remove 2 screws.

Step 9 : 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

SA-AK960P

the CD Changer Unit (CRS1).

8.6. Disassembly of Rear Panel

8.5. Disassembly of Subwoofer Interface P.C.B.

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

• Follow the (Step 1) - (Step 7) of Item 8.4

Step 1 : Upset the CD changer mechanism.

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

• Follow the (Step 1) - (Step 7) of Item 8.4

Step 1 : Detach 2P cable at connector (CN3204) on Main P.C.B..

Step 2 : Release 2 catches and remove Subwoofer Interface P.C.B. as arrow shown.

Step 2 : Remove 6 screws.

Step 3 : Release 2 catches.

Step 4 : Remove Rear Panel.

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