Panasonic sa ak 90 service manual

Page 1

"Miti-slang misc Sal-[ping

3st I-MASH is a trademark of NTT.

ORDER NO. MD970604401

Service Manual

I comm
dues

DIGITAL AUDIO

CD Stereo System

SA-AKQO

colour (K) BuulackType

Areas
Remote nuntmi
Transmit PC .................... Canada.
System Main unit Speakers
SO-AKsO SA-AKQD SB-A K90
.. seiikso sA-AKso 5mm,
Tape Deck: Mechanism AR2 Series
Traverse Deck: RAE01 502 Mechanism Series
Specifications
Amplifier section Frequency response (-3, +6 dB) at DECK OUT
Rated minimum sine wave NORMAL 35Hz-14kHz
RMS power output HIGH 35Hz~i 4kHz
0.9% total harmonic distortion SIN 50d5(A weighted)
50Hz-120Hz both channels driven 75W per channel (.9) Wow and flutter 0.18%(WRMS)

120Hz-20KHz both channel driven
Total BI-AMP power
Input sensitivity
AUX
Input impedance
AUX

FM tuner section
Frequency range

Sensitivity
Antenna terminalis)
AM tuner section
Frequency range
Sensitivity
SIN 2MB

Cassette deck section
Track system
Heads
Record/playback
Erasure
Motor
Recording system
Erasing system
rape speed

25W per channel (60)
100W per channel

250mV

15m

B7.Q-107.9MHZ (ZDOkHz steps)
87.5-1 DENIM Hz (1 ODkHZ Steps)
23.3dBi(4.0mV, 1H FEB)

75E) (unbalanced)

520-1710kHZ

SDDuVIm

4 track, 2 channel

Solid parmaiioy head
Double gap Ierrite head
DC servo motor

AC bias iflORHz

AC erase

4.8:mlsli7la ips)

Fast forward and rewind limes
Approx. 120 seconds witirC-GO cassette tape

CD section
Sampling trequency 44.1 kHz
Decoding 16 bit linear
Beam source/waveliength Semiconductor laser/730nm
Number of channels Stereo
SIN
SF out 87dB(JIS.A)
Wow and flutter Below measurable limit
Digital ilillei' Sis
DIA convener MASH bit DAG)
General
Power supply A01 20V, 60Hz

Power consumpiion 155W

DimenilonlexHxD) 27D(VVide)/345(High)/S94(Depth)mm

1U%'(\Md8)X1 319132'(High)X1 51/2"(Depth) inch

Weight 10.3kG
Notes:

1. Specifications are subject to change without notice.
Weight and dimentions are approximate.
2. Total harmonic distortion is measures by the digital spectmm analyzer.

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 at 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.

Panasonic

© 1997 Matsushita Electric industrial 00., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

SA-AKQO

I Contents

Precaution of Laser Diode

Page

Wiring Connection Diagram ......... ...................... 61,62

safety Precaution ........... Type Illustration of CDs, Transistors, and Diodes .. . 63
Accessories ............. Primed Circuit Board Diagram 64 72
Location ot Controls .. Terminal Function of 10s ~ 78
Connections ............ Replacement Parts List (Cabinet 79
Listening to the Radio Cabinet Parts Location 80,81
Listening to CDs . Replacement Parts List (Electrical, Deck Mechanism) .. 82 ~ 85
Listening to Tapes Mechanism Paris Location . 86,87
Handling Precautions for Traverse Dec Replcement Parts List (Loading) 88,89
Operation Checks and Main Loading Parts Location 50,91

Component Replacement Procedures . Resistors and Capacitors. 92 ~ 96

Measurements and Adjustments.
Schematic Diagram
Block Diagram .....

I Precaution of Laser Diode
CAUTION:

Replacement Parts List (Packing, Accessories,
Grease or Jlgri'ooi, Mechanism unit)
Packaging

This unit utilizes a class 1 laser. invisible laser radiation is emitted from the optical pickup lens when the unit is

turned on :

1. Do not look directly into the pickup lens.

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

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

4. Do not disassemble the optical pickup unit.

5. If the optical pickup is replaced, use the manufactures specified replacement pickup only.

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

hazardous radiation exposure.

I Safety Precaution (This safety precaution is applied only in U.S.A.)

PIPE???

customer from being exposed to a shock hazard.

I iNSULATION RESISTANCE TEST

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

When replacing parts, use only manuiactures recommended components for safety.

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

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

Before returning the serviced equipment to the customer, be sure to make the ioliowing insulation resistance test to prevent the

1. Unplug the power cord and short the two prongs oi the plug with a jump

2. Turn on the power switch.

3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed metal cabinet part, such as
screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals should read between (SM!) and
5.2 M9 to all exposed parts. (Fig. A) Equipment without antenna terminals should read approximately infinity to all exposed

parts. (Fig. B)

Antenna

terminal \

Exposed ,A Exposed r/wo
metal part metal part

Ohmmeter
(Fig. A)

Resistance=3M Q-5.2M Q

Ohmm eter
(F19- B)

ResistanceaApprox. 00

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.

4. lithe measurement is outside the specified limits, there is a possibility of ashock hazard. The equipment should be repaired and

rechecked before it is retumed to the customer.

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