Panasonic SA-AK110P Manuale utente

■AMPLIFIER SECTION

Power output

10% Total harmonic distortion

60Hz-16kHz, both channels driven

60 W per channel (6 Ω)

Power output

10% Total harmonic distortion

1kHz, both channels driven 80W per channel (6Ω)

Input sensitivity

AUX 250 mV

Input impedance

AUX 13.3kΩ

■FM TUNER SECTION

Frequency range

87.9 - 107.9 MHz (200 kHz steps)

87.5 - 108.0 MHz (100 kHz steps)

Sensitivity 2.5µV (IHF)

S/N 26 dB 2.2 µV

Antenna terminal(s) 75 Ω(unbalanced)

■AM TUNER SECTION

Frequency range 520 - 1710 kHz (10 kHz steps)

Sensitivity

S/N 20 dB (at 1000 kHz) 560 µV/m

■CASSETTE DECK SECTION

Track system 4 track, 2 channel

Heads

reserved. Unauthorized copying and distribution is a

violation of law.

SA-AK110P

Colour

(K)... Black Type

TAPE SECTION :

SG-2W MECHANISM SERIES

Record/playback Solid permalloy head

Erasure Double gap ferrite head

Motor DC servo motor

Recording system AC bias 100 kHz

Erasing system AC erase 100 kHz

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

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

NORMAL (TYPE I) 35 Hz - 14 kHz

S/N 50 dB (A weighted)

Wow and flutter 0.18 % (WRMS)

Fast forward and rewind time Approx. 120 seconds with

C-60 cassette tape

■CD SECTION

Sampling frequency 44.1 kHz

Decoding 16 bit linear

Beam source/wave length Semiconductor laser/780 nm

Number of channels Stereo

Frequency response 20 Hz - 20 kHz (+1, -2 dB)

Wow and flutter Below measurable limit

Digital filter 8fs

D/A converter MASH (1 bit DAC)

■GENERAL

Power supply AC 120 V, 60Hz

Power consumption 165 W

Power Consumption in standby

mode 0.34 W

CD Stereo System

Specifications

ORDER NO. MD0211231C1

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Dimensions (W x H x D) 250 x 330 x 370 mm

(9 27/32” x 13” x 14 3/8 “)

Mass 7.0 kg (15.4 lb.)

■SYSTEM

SC-AK110 (P) Music center: SA-AK110 (P)

Speaker: SB-AK110 (P)

1 Safety Precaution 3

2 Before Repair and Adjustment 3

3 Protection Circuitry 4

4 Accessories 4

5 Handling Precautions For Traverse Deck 5

6 Precaution of Laser Diode 6

7 Operation Procedures 7

8 Operation Checks and Component Replacement Procedures

9 Self-Diagnostic Function 35

10 Description of Error Code 36

Notes:

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

dimensions are aproximate.

2.Total harmonic distortion is measured by the digital spectrum

analyzer.

11 CD Test Mode Function 37

12 Measurements and Adjustments 38

13 Illustration of IC’s, Transistors and Diodes 40

14 Terminal Function of IC’s 41

15 Block Diagram 44

16 Schematic Diagram 51

17 Printed Circuit Board 65

18 Wiring Connection Diagram 75

19 Troubleshooting Guide 76

20 Parts Location and Replacement Parts List 77

CONTENTS

Page Page

SA-AK110P /

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

1.Unplug the power cord and short the two prongs of the plug

with a jumper wire.

2.Turn on the power switch.

3.Measure the resistance value with ohmmeter between the

jumper AC plug and each exposed metal cabinet part, such

as screwheads, antenna, control shafts, handle brackets,

etc.

Equipment with antenna terminals should read between

2.7MΩand 3.9MΩto all exposed parts*. (Fig.1)

Equipment without antenna terminals should read

approximately infinity to all exposed parts. (Fig.2)

*Note : Some exposed parts may be isolated from the

chassis by design. These will read infinity.

4.If the measurement is outside the specified limits, there is a

possibility of a shock hazard. The equipment should be

repaired and rechecked before it is returned to the

customer.

Fig.1

Fig.2

1 Safety Precaution

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. Insulation Resistance Test

2 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C520 and C540 through a 10Ω, 5W 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 120V, 60 Hz in NO SIGNAL mode should be ~600mA.

SA-AK110P /

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4 Accessories

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.

Remote Control

Transmitter

FM indoor antenna

AC power supply cord

AM Loop antenna

SA-AK110P /

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5 Handling Precautions For Traverse Deck

The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of

clothes or human body.

So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).

• Handling of traverse deck (optical pickup)

1.Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.

2.The short land between the No.4(LD) and No.5(GND) pins on the flexible board (FFC) is shorted with a solder build-up to

prevent damage to the laser diode.To connect to the PC board, be sure to open by removing the solder build-up, and finishthe

work quickly.

3.Take care not to apply excessive stress to the flexible board (FFC).

4.Do not turn the variable resistor (laser power adjustment). It has already been adjusted.

• Grounding for electrostatic breakdown prevention

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 deck (optical pickup) is placed, 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 deck (optical pickup).

Caution when Replacing the Traverse Deck :

The traverse deck has a short point shorted with solder to protect the laer diode against electroststics breakdown. Be sure to

remove the solder from the short point before making connections.

SA-AK110P /

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This unit utilizes a class 1 laser.

Invisible laser radiation is emitted from the optical pickup lens.

When the unit is turned on:

■Use of caution label

6 Precaution of Laser Diode

CAUTION:

1.Do not look directly into the pick up lens.

2.Do not use optical instruments to look at the pick up lens.

3.Do not adjust the preset variable resistor on the pickup lens.

4.Do not disassemble the optical pick up unit.

5.If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.

6.Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation

exposure.

CAUTION!

THIS PRODUCT UTILIZES A LASER.

USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT

IN HAZARDOUS RADIATION EXPOSURE.

SA-AK110P /

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7 Operation Procedures

SA-AK110P /

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Some chassis components may have sharp edges.

Be careful when disassembling and servicing.

8 Operation Checks and Component Replacement

Procedures

“ATTENTION SERVICER”

This section describes procedures for checking the operation of the major printed circuit boards and replacing the

main components.

For reassembly after operation checks or replacement, reverse the respective procedures.

Special reassembly procedures are described only when required.

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

Warning:

This product uses a laser diode. Refer to caution statement Precaution of Laser Diode.

SA-AK110P /

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Step 1 Remove 3 screws each side and 5 screws at rear panel.

Step 2 Lift up both sides of cabinet ass’y, push the cabinet

ass’y toward the rear and remove the cabinet ass’y.

(The CD changer unit can be removed after the CD Lid is

removed)

When opening the disc tray automatically (Using Power

Supply)

Step 1 Connect the AC power cord.

Step 2 Press the POWER button to power up the main unit.

Step 3 Press the OPEN/CLOSE button, the disc tray will be

open automatically.

• Checking the Main P.C.B. as shown below.

8.2.1. Disassembly for the CD Lid

Step 4 Release the 2 claws, and then remove the CD Lid.

8.1. Checking for Main P.C.B.

8.2. Disassembly for the CD changer ass’y

• Follow the (Step 1) - (Step 2) of Item 8.1.

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Step 5 Press the POWER button to turn the power on.

Step 6 Press the OPEN/CLOSE button, the disc tray will be

close.

[Open the disc tray manually (Using service tools)]

Step 1 Upset the unit as shown below.

Step 2 Insert the gear tool into the hole on the underside of CD

chasis and then rotate in the direction of arrow. The disc tray

will be open.

Step 3 Release the 2 claws, and then remove the CD lid cover.

Step 4 Push the disc tray.

8.2.2. Disassembly for CD changer unit

• Follow the (Step 1) - (Step 2) of Item 8.1.

• Follow the Disassembly for the CD Lid of Item 8.2.1.

Step 1 Remove 2 screws at rear cabinet as show below.

Step 2 Lift up the mechanism unit cover, and then push in the

mechanism unit cover.

Step 3 Release the claws of both ends, and then lift up the CD

changer unit.

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