Panasonic sa ak750

Page 1

ORDER NO. MD07030230E

Service Manual

COMPACT

DIGITAL AUDIO

Control

CD Stereo System
SA-AK75OGCP

Colour
(K)... Black Type

Notes: This models CD mechanism changer unit is

(Order No. MD050936800) for this mechanism.

CRS1. Please refer to the original Service Manual

Specifications

n AMPLIFIER SECTION

RMS output power

THD 10%, both channels driven

1 kHz

(Low channel) 110 W per channel (3 Q)
10 kHz

(High channel) 110 W per channel (3 Q)
60 Hz

(Subwoofer channel) 220 W per channel (6 Q)

Total output power 660 W
n FMIAM TUNER, TERMINALS SECTION
Preset station FM 20 stations
AM 15 stations
Frequency Modulation (FM)

Frequency range 87.50 to 108.00 MHz (100 kHz

steps)
Sensitivity 4.0 W (lHF)
SN 26 dB 2.2 V

Antenna terminal(s)
Amplitude Modulation (AM)
Frequency range

75 Q (unbalanced)

522 to 1629 kHz (9 kHz step)
520 to 1630 kHz (10 kHz step)
Sensitivity
SN 20 dB (at 999 kHz)
Music Port input jack

560 uV/m

Panasonic?

Terminal Stereo, 3.5 mm jack
Sensitivity 100 mV, 4.7 kg
Phone jack

Terminal Stereo, 3.5 mm jack
MIC jack

Terminal Mono, 3.5 mm jack
Sensitivity 0.7 mV, 680 Q

n CASSETTE DECK SECTION

Track system 4 track, 2 channel

Heads

Record/playback Solid permalloy head
Erasure Double gap ferrite head
Motor DC servo motor

AC bias 100 kHz
AC erase 100 kHz
4.8 cm/s

Recording system

Erase system

Tape speed

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

NORMAL 35 Hz to 14 kHz

S/N ratio 50 dB (A weighted)

Wow and flutter 0.18 % (WRMS)

Fast forward and rewind time Approx. 120 seconds with
(3-60 cassette tape

11 DISC SECTION

Disc played [8 cm or 12 cm]

(1) CD»Audio (CD-DA)

© 2007 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

SA-AK7SOGCP

(2) CD»R/RW (CD-DA, MP3 formatted disc)

(3) MP3
MPEG-1 Layer 3, MPEG-2 Layer 3

Bit rate

MP3 32 kbps to 320 kbps
Sampling frequency

MP3 32 kHz, 44.1 kHz, 48 kHz
CD-DA 44.1 kHz
Decoding 16 bit linear
Digital filter 8 fs
D/A converter MASH (1 bit DAC)
Pick up

Wavelength 780 nm

Beam Source Semiconductor laser
Audio output (Disc)

Number of channels

n USB SECTION

Playable USB Storage Media

1) HDD

2) USB MP3 Player/Digital audio player
3) USB Thumbdrives

Supported audio file format

MP3 bit rate

USB memory port

2 (Stereo) (FL, FR)

Maximum current 500 mA

MP3

Audio output (MP3)
Number of channels
Frequency response (MP3)
S/N Ratio

32 kHZ, 44.1 kHz, 48 kHZ

2 channel
20 HZ to 20 kHz (o+/-1.0 dB)

USB unit out 85 dB

n GENERAL

Power supply AC 110 to 127/220 t0240 V,
50/60HZ

Power consumption 126 W

Power consumption in standby 0.7 W

mode

Dimensions (W x H x D) 250 x 330 x 323 mm

Mass 7.1 kg

Operating temperature range +5 to +35°C

Operating humidity range
It SYSTEM
SC-AK750 (GCP)

5 to 90% RH (no condensation)

Music center: SA-AK750 (GCP)
Speakers: SB»AK750 (PL)
Subwoofer: SB-WAK750 (PL)
For information on speaker system, please refer to the original
Service Manual (Order No. MD0703024CE) for SB-AK750PL»K and
(Order No. MD0703025CE) for SB»WAK750PL-K.
Notes:
1.Specifications are subject to change without notice. Mass and
dimensions are approximate.

Bit rate 2.Total harmonic distortion is measured by the digital spectrum
MP3 32 kbps to 320 kbps analyzer-
Sampling frequency

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

1 Safety Precautions ------

1.1. General Guidelines -------------------------------------------------------- 4
1.2. Before Use -------- 4
1.3. Before repair and adjustment
1.4. Protection Circuitry ---------------
1.5. Safety Part Information -------------------------------------------------- 5
2 Prevention of Electra Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices --------------------------------- 5
3 Handling Precautions For Traverse Deck ------------------------------- 7
4 Precaution of Laser Diode ------------------------------------------------------ 9
5 Warning ---------------------------------------------------------------------- 10
5.1. Service caution based on legal restrictions- -10
6 Accessorie 1
7 Operating Procedures- 2

7.1. Main Unit Key Buttons Operations
72. Remote Contraol Key Buttons Operations --------------------- 12
8 New Features ------------------------------------------------------------------------ 14

Page
8.1. Using the Music Port 8. Connecting and Playing a USB

Mass Storage Class Device---

9 Self diagnosis and special mode setting-
9.1. Service Mode Summary Table
9.2. Special Mode Table 1 ----------

9.3. Reliability Test Mode (CRS1 Mechanism) ...................... 20
9.4. Error code Table Display .............................................. 21
10 Assembling and Disassembling ........................................... 25
10.1. Caution ------------------------------------------------------------------------ 25
10.2. Disassembly flow chart ................................................. 25

10.3. Main Parts Location

10.4. Disassembly of Top Cabinet-
10.5. Disassembly of CD Changer Unit (CRS1
10.6. Disassembly of Rear Panel --
10.7. Disassembly of Main P.C.B.-
10.8. Disassembly of Transformer P.C.B. ------------------------------ 31
10.9. Disassembly of Power P.C.B. -------------------------- 32