Panasonic SA-AK310GC Manuel utilisateur

Service Manual

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ORDER NO. MD0212275C3

CD Stereo System



SA-AK310GC

SA-AK310GN

Colour

(S)... Silver Type

TAPE SECTION :

SG-2W MECHANISM SERIES

Specifications

AMPLIFIER SECTION

Power output

10% Total harmonic distortion

1kHz, both channels driven

(Low channel) 55 W per channel (6Ω)

10kHz, both channels driven

(High channel) 55 W per channel (6Ω)

Total Bi-Amp power 110 W per channel

Input sensitivity

AUX 250 mV

Input Impedance

AUX 13.3 kΩ

FM TUNER SECTION

Frequency range 87.50 - 108.00 MHz (50 kHz steps)

Sensitivity 2.5µV (IHF)

S/ N 26 dB 2.2µV

Antenna terminal(s) 75Ω(unbalanced)

AM TUNER SECTION

Frequency range 522 - 1629 kHz (9 kHz steps)

520 - 1630 kHz (10 kHz steps)

distribution is a violation of law.

Sensitivity

S/ N 20 dB (at 999 kHz) 560µV/ m

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

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 8 fs

D/ A converter MASH (1 bit DAC)

GENERAL

Power Supply

For GC only AC 110/ 127/ 220-230/ 240 V, 50/ 60Hz

For GN only AC 230-240 V, 50Hz

Power consumption

For GC only 172 W

For GN only 170 W

Power Consumption in standby mode

For GC only 0.85 W

For GN only 0.5 W

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

Mass

For GC only 7.8 kg

For GN only 7.0 kg

SYSTEM

SC-AK310 (GC) Music center: SA-AK310 (GC)

Speaker: SB-AK310 (GC)

SC-AK310 (GN) Music center: SA-AK310 (GN)

Speaker: SB-AK310 (GC)

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.

3. The labels“ HIGH” and“ LOW” on the rear of the speakers refer to High frequency and Low frequency.

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1 Before Use

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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 117V 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.)

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2 Before Repair and Adjustment

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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.

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3 Protection Circuitry

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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.

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4 Accessories

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Remote control transmitter

FM indoor antenna

AC power supply cord (For GC only)

AC power supply cord (For GN only)

AM Loop antenna

Power plug adaptor

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5 Operation Procedures

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6 Handling Precautions For Traverse Deck

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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)

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 workquickly.

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.

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