Panasonic sa ak250gcp
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Page 1
ORDER NO. MD0704056CE
Service Manual
COMPACT
DIGITAL AUDIO
Remote: SB-AK250 v
Control
SA-AK250
S B-AK250
CD Stereo System
SA-AK25OGCP
Colour
(8)... Silver Type
Notes: This models CD mechanism changer unit is CRS1. Please refer to the original Service Manual
(Order No. M0050936800) for this mechanism.
Specifications
n AMPLIFIER SECTION
RMS output power
THD 10%, both channels driven
1 kHz
Total output power
n FMIAM TUNER, TERMINALS SECTION
Preset station
115 W per channel (3 Q)
230 W
FM 20 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range
87.50 to 108.00 MHZ (50 kHz steps)
4.0 V (IHF)
2.2 V
75 Q (unbalanced)
Sensitivity
SN 26 dB
Antenna terminal(s)
Amplitude Modulation (AM)
Frequency range 522 to 1629 kHz (9 kHz step)
520 to 1630 kHz (10 kHz step)
Sensitivity
SN 20 dB (at 999 kHz)
Audio performance (Amplifier)
560 pV/m
Input Sensitivity] Input Impedance
Aux 250 mV, 14.7 kQ
Music Port input jack
Terminal
Panasonic?
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
Erasing 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
it DISC SECTION
Disc played [8 cm or 12 cm]
© 2007 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
Page 2
SA-AKZSOGCP
(1) CD-Audio (CD-DA)
(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 GENERAL
2 (Stereo) (FL, FR)
Power supply
AC 110 to 127/220 to 240 V, 50/60HZ
Power consumption 95 W
Power consumption in standby 0.7 W (Approx)
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-AK250 (GCP)
5 to 90% RH (no condensation)
Music center: SA-AK250 (GCP)
Speakers: SB-AK250 (PL)
For Information on speaker system, plesae refer to the original
Service Manual (Order No. MD0704055CE) for SB-AK250PL-S.
Notes:
1.Specifications are subject to change without notice. Mass and
dimensions are approximate.
2.Total harmonic distortion is measured by the digital spectrum
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 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
13- Before repair and adeStmem _________________________________________ 4
4
1.4. Protection Circuitry
1.5. Safety Part Information
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices ................................. 5
3 Handling Precautions For Traverse Unit ................................ 7
4 Precaution of Laser Diode ...................................................... g
5 About Lead Free Solder (PbF) .............................................. 10
5.1. Service caution based on legal restrictions .................... 10
6 Accessories -------------------------------------------------------------------------- 11
7 Operating Procedures ................
7.1. Main Unit Key Buttons Operation
7.2. Remote Control Key Buttons Operations-
8 New Features ------------------------------------------------------------------------ 14
8.1. Using the Music Port ---------------------------------------------------- 14
9 Self diagnosis and special mode setting ------------------------------ 16
9.1. Service Mode Summary Table -------------------------------------- 16
9.2. Special Mode Table 1 -------------------------------------------------- 16
9.3. Reliability Test Mode (CRS1 Mechanism) ---------------------- 19
9.4. Error code Table Display ---------------------------------------------- 21
10 Assembling and Disassembling
10.1. Caution --
10.2. Disassembly flow chart
10.3. Main Parts Location ----------------------------------------------------- 28
10.4. Disassembly of Top Cabinet-
10.5. Disassembly of CD Changer Unit (CR31) ..................... 29
10.6. Disassembly of Rear Panel .......................................... 30
10.7. Disassembly of Main P.C.B. ......................................... 31
10.8. Disassembly of Transformer P. .B
10.9. Disassembly of Power P.C.B
10.10. Disassembly of Front Panel Unit
10.11. Disassembly for Panel P_c_l3_ ....................................... 33
10.12. Disassembly of Tact Switch P.C.B. ............................... 34
10.13. Disassembly of Deck mechanism unit ........................... 34
10.14. Disassembly of Deck P.C.B. ......................................... 34
10.15. Disassembly of Traverse Unit --------------------------------------- 35
10.16. Disassembly for Deck Mechanism ................................ 35
10.17. Disassembly of Deck Mechanism P.C.B.
10.18. Disassembly of cassette lid
10.19. Rectification for tape jam problem-
11 Service Fixture and Tools ..................................................... 42
12 Service Positions .................................................................. 42
12.1. Cheeking and Repairing of Main P_c_l3_ ........................ 42
12.2. Checking and Repairing of Transformer P.C.B. ............. 43
12.3. Checking and Repairing of Panel, Deck & Deck
Mechanism P.C.B. .............................................. 43
12.4. Checking and Repairing of Power P.C.B. ...................... 44
13 Procedure for Checking Operation of Individual Parts of Deck
45
13.1. Operation Check with Cassette Tape --45
13.2. Operation Check without Cassette Tape ----------------------- 45
Mechanism Uri