Panasonic sa ak17 service manual

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ORDER NO. MDQQOSOSSCZ

Service Manual

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MASH

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DIGITAL AUDIO

CD Stereo System

SA- AK17

Colour
(K) Black Type

Area
6:31): S; Area Colour
(E) Europe
(EB) Great Britain (K)
(EG) Germany and Italy
Remote SB-AK17 SA-AK17 SB-AK17
(523mm System Music Center Speaker
SC~AK17 (E) SA~AK17 (E) SB-AKW (E)
SCAKI7 (EB) SA-AK17 (EB) SB-AK17 (E)
*l MASH is a trademark of NTT,| SC-AKW (EG) SA-AK17 (EG) SB-AK17 (E)

TAPE SECTION : AR2 MECHANISM SERIES

CD SECTION : RAEO1522-M TRAVERSE DECK SERIES

I Specifications

I Amplifier Section
RMS power output

THD 10%, both channels driven

For 30W per channel (69)
1 kHzcontinuous power output

THD 1%boII1 channels driven (DIN) 20W per Channel (612)
Input sensitivity and impedance

AUX 250mV,13.2K£2

I Cassette Deck Section

Track system 4 track) 2 channel
Heads
Recordlplayback 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
Frequency response (+3, -6 dB at DECK OUT)
NORMAL (TYPE I) 35 Hz - 14 kHz
HIGH (TYPE ll) 85 H2 - 14 kHz
sm 50d B(A weighted)
Wow and Ilutter 0.1 8 lo (WRMS)
Fast forward and rewind time
Approx. 120 seconds with C-GO cassette tape

I FM Tuner Section
Frequency range 87.50 - 108.00 MHz (50 kHz steps)
Sensitivity

SIN 26:13 1.5 (N

Antenna terminal(s) 75 t) (unbalanced)

Panasonic®

I AM Tuner Section
Frequency range 522 - 1629 kHz (9kHz steps)
Sensitivity

SIN 20 dB 560 (IV/m
I CD Section
Sampling trequency 44.1 kHz
Decoding 16 bit linear
Beam source/wave length Semiconductor laser / 780 nm
Number of channels Stereo

Frequency response 20Hz - 20kHz (+tdB. -2dB)
Wow and flutter Below measurable limit
Digital filter 8 ts
DIA converter MASH (1 bit DAC)

I General
Power consumption 120W
Power supply

For E,EG area AC 230V, SOHZ

For EB area AC 230 - 240V, 50Hz
Dimensions (W x H x D) 270 x 331 x 316 mm
Weight

For GN area 6.7 kg
Notes :

1. Specifications are subject to change without notice.
Weight and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum
analyzer.

(C) 1999 Matsushita Electronics (S) Pte. Ltd.
All rights reserved, Unauthorized copying
and distribution is a violation of law.

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SA-AK17

A WARNING
This service information is designed for experiense 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.

I Contents
BEFORE REPAIR AND ADJUSTMENT ..
PROTECTION CIRCUITRY
HANDLING PRECAUTIONS F0

Page

PRECAUTION OF LASER DIODE . 3
ACCESSORIES ........................ 4
CAUTION FOR AC MAIN LEADS . 4
CONNECTIONS .................. 5
LOCATION OF CONTROLS 6
RECORDING FROM RADIO BROADCASTS 7
RECORDING FROM COMPACT DISCS 8 & 9
TAPE- TO TAPE RECORDING 10
SETTING THE TIME 11

OPERATION CHECKS AND MAIN COMPONENT REPLACEMENT 11 ~ 18

SELF- DIAGNOSTIC DISPLAY FUNCTION. 19
DESCRIPTION OF ERROR CODE 20
CD TEST MODE FUNCTION ..... 21

MEASUREMENTS AND ADJUSTMENT S

I Before Repair and Adjustment

Page
ILLUSTRATION OF ICs, TRANSISTORS & DIODES ..... 24
TERMINAL FUNCTION OF ICs . .25 ~ 27
SCHEMATIC DIAGRAM 28 ~ 41
PRINTED CIRCUIT BOARD ..42 ~ 51
BLOCK DIAGRAM ................. 52 ~ 57
WIRING CONNECTION DIAGRAM 58
TROUBLESHOOTING GUIDE 59
MECHANISM PARTS LOCATION 60 & 61
MECHANISM PARTS LIST ................ 62
LOADING MECHANISM PARTS LIST . 62
CD LOADING UNIT PARTS LOCATION . 63 & 64
CABINET PARTS LOCATION . 65 & 66
REPLACEMENT PARTS LIST 67 ~ 70
RESISTORS & CAPACITORS 70 ~ 74
PACKING MATERIALS & ACCESSORIES . 75
PACKAGING .. 75

Disconnect AC power, discharge Power Supply Capacitors 0506 ~ 0508 through a 109 , 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 varlac, to avoid overourrent.

For E, E6

Current consumption at AC 230V, 50 Hz in NO SIGNAL mode should be ~350mA.

For EB

Current consumption at AC 240V, 50 Hz in NO SIGNAL mode should be ~350mA.

I 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 circuttry 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.

I 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 finish the work quickly.

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

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

Lens
(Do not touch)

Flexible board
FFC
(Handle it carefully)

Variable resistor

No.5 Pin (GNU) (Do not turn)

No.4 Pln (LD)