Panasonic SA-AK633P User manual

nAMPLIFIER SECTION
RMS output power
THD 10%, both channels driven
1 kHz
(Low channel) 70 W per channel (5 Ω)
10 kHz
(High channel) 65 W per channel (5 Ω)
80 Hz
(Subwoofer channel) 160 W (8 Ω)
Total power output 430 W
FTC output power
THD 10%, both channels driven
100 Hz-3 kHz
(Low channel) 55 W per channel (5 Ω)
3 kHz-10 kHz
(High channel) 53 W per channel (5 Ω)
50 Hz-100 Hz
(Subwoofer channel) 130 W (8 Ω)
Total FTC power 346 W
nFM/AM TUNER, TERMINALS SECTION
Preset station FM 15 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range
87.9 - 107.9 MHz (200 kHz steps)
87.5 - 108.0 MHz (100 kHz steps)
Sensitivity 2.5 µV (IHF)
S/N 26 dB 2.2 µV
A
ntenna terminal(s) 75 Ω(unbalanced)
©2005 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-AK633P
Colour
(K)... Black Type
A
mplitude Modulation (AM)
Frequency range 520 - 1710 kHz (10 kHz steps)
Sensitivity
S/N 20 dB (at 1000 kHz) 560 µV/m
A
udio performance (Amplifier)
Input sensitivity/Input impedance
A
ux 250 mV,14.7 kΩ
Phone jack
Terminal Stereo, 3.5 mm (1/8”) jack
nCASSETTE 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 4.8cm/s(1-7/8ips)
Overall frequency response (+3 dB, -6 dB at DECK OUT)
NORMAL 35 Hz - 14 kHz
S/N ratio 50 dB (A weighted)
Wow and flutter 0.18 % (WRMS)
Fast forward and rewind time Approx. 120 seconds with
C-60 cassette tape
nDISC SECTION
Discs played [8 cm (3”) or 12 cm (5”)]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3 formatted disc)
CD Stereo System
Specifications
ORDER NO. MD0503105C1
A6

(3) MP3
Bit rate
MP3 32 kbps - 320 kbps
Sampling frequency
MP3 32 kHz, 44.1 kHz, 48 kHz
CD 44.1 kHz
Decoding 16 bit linear
Digital filter 8fs
D/A converter MASH (1 bit DAC)
Pickup
Wavelength 780 nm
Beam Source Semiconductor laser
A
udio output (Disc)
Number of channels 2 (Stereo) (FL,FR)
nGENERAL
Power Supply AC 120 V, 60Hz
1 Safety Precaution 4
1.1. Insulation Resistance Test 4
2 Before Repair and Adjustment 5
3 Protection Circuitry 5
4 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices 5
5 Handling the Lead-free Solder 6
5.1. About lead free solder (PbF) 6
6 Handling Precautions For Traverse Deck 7
7 Precaution of Laser Diode 8
8 Accessories 9
9 Operation Procedures 10
10 Disassembly and Assembly of Main Component 12
10.1. Disassembly flow chart 12
10.2. Gear for servicing (jig) Information 13
10.3. Disassembly of Top Cabinet 14
10.4. Disassembly of CD Lid 14
10.5. Disassembly of Rear Panel 16
10.6. Disassembly of CD Mechanism Unit 16
10.7. Disassembly of Main P.C.B. 17
10.8. Disassembly of Sub-Power P.C.B. 17
10.9. Disassembly of Power P.C.B. 18
10.10. Disassembly of Transformer P.C.B. 20
10.11. Disassembly of Front Panel Unit 20
10.12. Disassembly of Deck Mechanism Unit 21
10.13. CD Mechanism Main Component Replacement
Procedures 22
10.14. Replacement for the pinch roller ass 馳and head block 35
Power consumption 255 W
Power consumption in standby
mode
0.38 W
Dimensions (W x H x D) 250 x 330 x 341 mm
(9-27/32” x 13” x 13-7/16”)
Mass 7.1 kg (15.7 lb.)
Operating temperature range +5to+35°C(+41to+95°F)
Operating humidity range 5 to 90% RH (no condensation)
nSYSTEM
SC-AK633 (P) Music center: SA-AK633 (P)
Speaker: SB-AK630 (P)
Subwoofer: SB-WAK630 (P)
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.
10.15. Replacement for the Deck motor ass 馳, capstan belt A,
capstan belt B and winding belt 36
10.16. Replacement for the cassette lid ass 馳39
10.17. Rectification for tape jam problem 40
11 Checking for major P.C.Bs 41
11.1. Checking of Main P.C.B. 41
11.2. Checking of Transformer P.C.B. 42
11.3. Checking of Panel, Deck & Deck Mechanism P.C.B. 43
11.4. Checking of Power P.C.B. 44
12 Self-Diagnostic Function 45
12.1. Self-diagnostic display 45
12.2. How to enter the Self-Diagnostic Function 45
12.3. Cassette Mechanism Test (For error code H01, H02, H03,
F01) 45
12.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29,
F30, H15 & H16) 45
12.5. To clear all Error code 46
12.6. To exit from Self-Diagnostic function 46
12.7. Power Amplifier Failure (F61) 46
12.8. Description of Error Code 46
13 CD Test Mode Function 48
13.1. How to set CD test mode 48
13.2. CD Automatically Adjustment result indication 48
13.3. CD Mecha Aging Test Mode (CR20) 48
13.4. Micon ROM Checksum and Version Display Mode 49
14 Measurements and Adjustments 50
14.1. Cassette Deck Section 50
14.2. Tuner Section 50
CONTENTS
Page Page
2
SA-AK633P

14.3. Alignment Points 51
15 Block Diagram 52
16 Voltage Measurement 60
17 Schematic Diagram 62
17.1. (A) CD Servo Circuit 63
17.2. (B) Main (Tuner) Circuit 65
17.3. (B) Main Circuit 66
17.4. (C) Panel Circuit 71
17.5. (D) Transformer Circuit 73
17.6. (E) CD Detect Circuit, (F) Spindle Position Circuit, (G)CD
Loading Circuit & (L) Sub-Power Circuit 74
17.7. (H) Power Circuit 75
17.8. (I) Deck Circuit & (J) Deck Mechanism Circuit 76
18 Printed Circuit Board 78
18.1. (A) CD Servo P.C.B. 78
18.2. (B) Main P.C.B. 79
18.3. (C) Panel P.C.B. 81
18.4. (D) Transformer P.C.B. 83
18.5. (E) CD Detect P.C.B., (F) Spindle Position P.C.B., (G) CD
Loading P.C.B. & (K) Tuner Pack P.C.B. 84
18.6. (H) Power P.C.B. & (L) Sub-Power P.C.B. 85
18.7. (I) Deck P.C.B. & (J) Deck Mechanism P.C.B. 87
19 Wiring Connection Diagram 88
20 Illustration of IC 痴, Transistors and Diodes 89
21 Terminal Function of IC 痴90
21.1. IC7002 (MN6627953HB) Servo processor/ Digital signal
processor/ Digital filter/ D/A converter 90
21.2. IC7003 (AN8739SBTE2) Focus coil/ Tracking coil/
Traverse motor/ Spindle motor drive 90
21.3. IC2801 (C2CBJG000561) System Microprocessor 91
22 Troubleshooting Guide 93
23 Parts Location and Replacement Parts List 94
23.1. Deck Mechanism (RAA4502-S) 95
23.2. CD Loading Mechanism (RD-DAC026-S) 98
23.3. Cabinet 101
23.4. Electrical Parts List 103
23.5. Packing Materials & Accessories Parts List 112
23.6. Packaging 113
3
SA-AK633P

1 Safety Precaution
(This “Safety Precaution” is applied only in U.S.A.)
1. Before servicing, unplug the power cord to prevent an
electric shock.
2. When replacing parts, use only manufacturer’s
recommended components for safety.
3. Check the condition of the power cord. Replace if wear or
damage is evident.
4. After servicing, be sure to restore the lead dress, insulation
barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer,
be sure to make the following insulation resistance test to
prevent the customer from being exposed to a shock
hazard.
1.1. Insulation Resistance Test
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with ohmmeter between the jumper AC plug and each exposed metal cabinet part, such as
screwheads, antenna, control shafts, handle brackets, etc.Measure the resistance value with ohmmeter between the jumper AC
plug and each exposed metal cabinet part, such as screwheads, antenna, control shafts, handle brackets, etc.
Equipment with antenna terminals should read between 2.7MΩand 3.9MΩto all exposed parts*. (Fig.1)
Equipment without antenna terminals should read approximately infinity to all exposed parts. (Fig.2)
*Note : Some exposed parts may be isolated from the chassis by design. These will read infinity.
4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be repaired
and re-checked before it is returned to the customer.
Fig.1
Fig.2
4
SA-AK633P

1.1.1. Caution for fuse replacement
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C5820 and C5840 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.
Current consumption at AC 120V, 60 Hz in NO SIGNAL mode (volume min at CD mode) should be ~600mA.
3 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 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.
4 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as
aluminium foil, to prevent electrostatic charge build up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminium foil or
comparable conductive material).
5
SA-AK633P

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to
damage an ES device).
5 Handling the Lead-free Solder
5.1. About lead free solder (PbF)
Distinction of PbF P.C.B.:
P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B.
Caution:
· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please
use a high temperature soldering iron. In case of soldering iron with temperature control, please set it to 700 ± 20°F (370 ±
10°C).
· Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
· When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the
soldering points with the Pb free solder until it melts enough.
6
SA-AK633P

6 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. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board).
3. Take care not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish
the job in as short time as possible.
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 place, 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 laser diode against electrostatics breakdown. Be sure to
remove the solder from the short point before making connections.
7
SA-AK633P

This unit utilizes a class 1 laser.
Invisible laser radiation is emitted from the optical pickup lens.
Wavelength: 780nm
When the unit is turned on:
nUse of caution label (Except for U.S.A.)
7 Precaution of Laser Diode
CAUTION:
1. Do not look directly into the pick up lens.
2. Do not use optical instruments to look at the pick up lens.
3. Do not adjust the preset variable resistor on the pickup lens.
4. Do not disassemble the optical pick up unit.
5. If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.
6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation
exposure.
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.
8
SA-AK633P

8 Accessories
Remote Control
FM Antenna
AC Cord
AM Loop Antenna
9
SA-AK633P

9 Operation Procedures
10
SA-AK633P

11
SA-AK633P

10 Disassembly and Assembly of Main Component
“ATTENTION SERVICER”
Some chassis components may have sharp edges. Be careful when disassembling and servicing.
1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main
components.
2. For reassembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
3. Select items from the following index when checks or replacement are required.
4. Refer to the Parts No. on the page of “Parts Location and Replacement Parts List” (Section 23), if necessary.
10.1. Disassembly flow chart
The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the
servicing.
To assemble the unit, reverse the steps shown in the chart as below.
12
SA-AK633P

10.2. Gear for servicing (jig) Information
1. This unit has a gear which is used for checking items (Open/Close of disc tray, up/down operation of traverse unit by manually)
when servicing.
2. For preparation of gear (for servicing), perform the procedures as follows.
3. In case of re-servicing the same set, the “gear for servicing” may has been taken off because it has been used. The “gear for
servicing” must be stored.
· Remove the gear provided with mecha cover as shown below.
· Insert the hexagonal screwdriver (2mm) into the gear, and then project the tip of screwdriver for 1~ 2 mm in length.
13
SA-AK633P

Step 1 Remove 2 screws at each side and 5 screws at rear
panel.
Step 2 Lift up both sides of the top cabinet, push the top
cabinet towards the rear and remove the top cabinet.
· Opening the disc tray automatically (Using Power
Supply)
Step 1 Connect the AC power cord.
Step 2 Press the POWER button to power up the main unit.
Step 3 Press the OPEN/CLOSE button, the disc tray will open
automatically.
Step 4 Release the 2 claws, and then remove the CD Lid.
Step 5 Press the OPEN/CLOSE button, the disc tray will close.
10.3. Disassembly of Top Cabinet
10.4. Disassembly of CD Lid
(The CD changer unit can be removed after the CD Lid is removed)
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
14
SA-AK633P

Step 6 Press the POWER button to turn the power off.
· [Opening the disc tray manually (Using service tools)]
Step 1 Insert the gear tool into the hole on the underside of CD
chassis and then rotate in the direction of arrow. The disc tray
will be opened.
Step 2 Release the 2 claws, and then remove the CD lid cover.
Step 3 Repeat Step 2 but rotate the gear tools in anti-clockwise
direction.
Step 4 The disc tray will be closed.
15
SA-AK633P

Step 1 Remove 7 screws and disconnect wire CN2810 (Fan) at
rear cabinet as shown.
Step 1 Remove one screw at rear panel.
Step 2 Detach the FFC wires (CN2801 & CN2805).
Step 3 Release the claws of both ends, and then lift up the CD
Mechanism Unit.
Step 4 Remove 4 screws.
Step 5 Remove the CD chassis.
Step 6 Lay the CD mechanism unit as shown.
· For disassembly of CD mechanism unit, please refer to
Section 10.13 of this manual.
10.5. Disassembly of Rear Panel
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
10.6. Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
16
SA-AK633P

Step 1 Disconnect FFC wires CN2803 & CN2806 from Main
P.C.B.
Step 1 Remove the 2 screws fixed at Sub Power P.C.B..
Step 2 Lift up Main P.C.B. by disconnecting connectors
CN5800 & CN5801 as arrow shown above.
Step 2 Remove 2 screws at Power Amplifier IC.
Step 3 Disconnect connector CN5803
Step 4 Lift up the Sub Power P.C.B. to remove it.
10.7. Disassembly of Main P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of CD Mechanism Unit
10.8. Disassembly of Sub-Power P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.7 - Disassembly of Main P.C.B.
17
SA-AK633P

· Replacement of Power Amplifier IC
Step 1 Desolder the terminals of Power Amplifier IC and
replace the component.
Step 1 Remove the 2 screws fixed at heat sink.
Step 2 Remove1 screw fixed at Power P.C.B..
Note:
Insulate the Power P.C.B. with insulation material to avoid short
circuit.
10.9. Disassembly of Power P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.7 - Disassembly of Main P.C.B.
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SA-AK633P

Step 1 Remove 2 screws fixed to the Power Amplifier IC and 1
screw to Voltage Regulator.
Step 2 Break the joint with a metal cutter as shown below.
Step 3 Unsolder the terminals of Power Amp IC, transistor and
replace the components.
Step 4 Fix back the cut portion with a screw as shown.
· Replacement of the Power Amplifier IC/ Voltage Regulator
19
SA-AK633P

Step 1 Remove 3 screws, disconnect connector CN5950.
Step 1 Lay the unit as shown below.
Step 2 Release 2 claws at bottom and 2 claws each side, draw
the front panel ass’y forward.
Step 3 Remove volume knob and adaptor.
· Disassembly of Panel P.C.B.
10.10. Disassembly of Transformer P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of CD Mechanism Unit
10.11. Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of Top Cabinet
· Follow the (Step 1) - (Step 6) of Item 10.4 - Disassembly of CD Lid
· Follow the (Step 1) of Item 10.5 - Disassembly of Rear Panel
· Follow the (Step 1) - (Step 3) of Item 10.6 - Disassembly of CD Mechanism Unit
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SA-AK633P