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ORDER NO. MD0403067C3
CD Stereo System
SA-AK220GCP
Colour
(S)... Silver Type
Specifications
n AMPLIFIER SECTION Erasing system AC erase 100 kHz
RMS Power output Tape speed 4.8 cm/s
THD 10%, both channels driven Overall frequency response (+3 dB, -6 dB at DECK OUT)
1 kHz 80 W per channel (6 ) NORMAL (TYPE I) 35 Hz - 14 kHz
Total Bi-Amp power 160 W per channel S/N 50 dB (A weighted)
Input sensitivity Wow and flutter 0.18 % (WRMS)
AUX 250 mV Fast forward and rewind time Approx. 120 seconds with
Input Impedance C-60 cassette tape
AUX 13.3 k n CD SECTION
n FM TUNER SECTION Sampling frequency 44.1 kHz
Frequency range Decoding 16 bit linear
87.50 - 108.00 MHz (50 kHz steps) Beam source/wavelength Semiconductor laser/780 nm
Sensitivity 2.5µV (IHF) Number of channels Stereo
S/N 26 dB 2.2 µV Frequency response 20 Hz - 20 kHz (+1, -2 dB)
Antenna terminal(s) 75 (unbalanced) Wow and flutter Below measurable limit
n AM TUNER SECTION Digital filter 8 fs
Frequency range 522 - 1629 kHz (9 kHz steps) D/A converter MASH (1 bit DAC)
520 - 1630 kHz (10 kHz steps) MP3
Sensitivity Bit rate 32 kbps - 320 kbps
S/N 20 dB (at 999 kHz) 560 µV/m Sampling frequency 32 kHz, 44.1 kHz, 48 kHz
n CASSETTE DECK SECTION n GENERAL
Track system 4 track, 2 channel Power Supply AC 110/ 127/ 220-230/ 240 V,
Heads 50/ 60 Hz
Record/playback Solid permalloy head Power consumption 179 W
Erasure Double gap ferrite head Power consumption in standby 0.85 W
Motor DC servo motor mode
Recording system AC bias 100 kHz Dimensions (W x H x D) 250 x 330 x 363 mm
© 2004 Panasonic AVC Networks Singapore Pte.
Ltd. All rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-AK220GCP
Mass 7.5 kg Notes:
n SYSTEM
SC-AK220 (GCP) Music center: SA-AK220 (GCP) 1. Specifications are subject to change without notice. Mass and
Speaker: SB-AK220 (P) dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
3. The labels "HIGH" and "LOW" on the rear of the speakers refer
to High frequency and Low frequency.
CONTENTS
Page Page
1 Before Use 4 13.1. Self-diagnostic display 37
2 Before Repair and Adjustment 4 13.2. How to enter the Self-Diagnostic Function 37
3 Protection Circuitry 4 13.3. Cassette Mechanism Test (For error code H01, H02, H03,
4 Prevention of Electro Static Discharge (ESD) to F01, F02) 37
Electrostatically Sensitive (ES) Devices 4 13.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29,
5 Handling the Lead-free Solder 5 H15) 38
5.1. About lead free solder (PbF) 5 13.5. To clear all Error code 38
6 Handling Precautions For Traverse Deck 6 13.6. How to get out from Self-Diagnostic function 38
7 Precaution of Laser Diode 7 13.7. Power Amplifier Failure (F61) 38
8 Accessories 8 14 CD Test Mode Function 39
9 Operation Procedures 9 14.1. How to set CD test mode 39
10 Disassembly and Assembly of Main Component 10 14.2. CD Automatically Adjustment result indication 39
10.1. Disassembly flow chart 10 15 Measurements and Adjustments 40
10.2. Disassembly of Top Cabinet and Rear Panel 11 15.1. Cassette Deck Section 40
10.3. Disassembly of CD Mechanism Unit 13 15.2. Tuner Section 40
10.4. Disassembly Main P.C.B., Transformer P.C.B., Voltage 15.3. Alignment Points 41
Selector P.C.B. & Power P.C.B. 14 16 Block Diagram 42
10.5. Disassembly of Panel P.C.B. & Tact Switch P.C.B. 15 17 Schematic Diagram 49
10.6. Disassembly of Deck Mechanism Unit & Deck P.C.B. 16 17.1. (A) CD Servo Circuit 50
10.7. CD Mechanism Main Component Replacement 17.2. (B) Tuner/Main Circuit 52
Procedures 16 17.3. (B) Main Circuit 53
10.8. Replacement for the pinch roller ass and head block 29 17.4. (C) Panel Circuit & (D) Tact Switch Circuit 58
10.9. Replacement for the Deck motor ass , capstan belt A, 17.5. (F) CD Detect Circuit, (G) Spindle Position Circuit & (H)
capstan belt B and winding belt 30 CD Loading Circuit 60
10.10. Replacement for the cassette lid ass 33 17.6. (E) Transformer Cuircuit & (L) Voltage Selector Circuit 61
10.11. Counter- measure for tape trouble 33 17.7. (I) Power Circuit 62
11 Service Position 34 17.8. (J) Deck Circuit & (K) Deck Mechanism Circuit 63
11.1. Checking Procedure 34 18 Printed Circuit Board 65
11.2. Checking the Main P.C.B., Power P.C.B., Transformer 18.1. (A) CD Servo P.C.B. (Side A & Side B) 65
P.C.B. and Voltage Selector P.C.B. 34 18.2. (B) Main P.C.B. 67
11.3. Checking the Panel P.C.B., Tact Switch P.C.B., Deck 18.3. (C) Panel P.C.B. 69
P.C.B. & Deck Mechanism P.C.B. 35 18.4. (D) Tact P.C.B. & (M) Voltage Selector P.C.B. 71
12 Description of Error Code 36 18.5. (E) Transformer P.C.B. 72
12.1. Abnormality detection for Deck Mechanism block 36 18.6. (F) CD Detect P.C.B., (G) Spindle Position P.C.B., (H) CD
12.2. Abnormality detection for CD/Changer block 36 Loading P.C.B. & (L) Tuner Pack P.C.B. 74
12.3. Power supply related error detection 36 18.7. (I) Power P.C.B. 75
13 Self-Diagnostic Function 37 18.8. (J) Deck P.C.B. & (K) Deck Mechanism P.C.B. 77
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SA-AK220GCP
19 Wiring Connection Diagram 78 22 Troubleshooting Guide 83
20 Illustration of IC , Transistors and Diodes 79 23 Parts Location and Replacement Parts List 84
21 Terminal Function of IC 80 23.1. Deck Mechanism (RAA4502-S) 85
21.1. IC701 (AN22004A-NF) Servo Amplifier 80 23.2. CD Loading Mechanism (RD-DAC026-S) 88
21.2. IC702 (MN6627934CH) Servo Processor/ Digital Signal 23.3. Cabinet 91
Processor/ Digital Filter/ D/A Converter 80 23.4. Electrical Parts List 94
21.3. IC703 (AN8739SBTE2) Focus Coil/ Tracking Coil/ 23.5. Packing Materials & Accessories Parts List 102
Traverse Motor/ Spindle Motor Driver 81 23.6. Packaging 103
21.4. IC305 (C2CBJF000017) System Microprocessor 81
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SA-AK220GCP
1 Before Use
Be sure to disconnect the mains cord before adjusting the voltage selector.
Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will
be used. (If the power supply in your area is 117V or 120V, set to the "127V" position.)
Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries,
the correct voltage is already set.)
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C520 and C540 through a 10, 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 110V, 50/60 Hz in NO SIGNAL mode (volume min at CD mode), should be ~ 500mA & at AC 220V-
230V, 50 Hz should be ~350mA.
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-equiped 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 equiped 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).
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
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SA-AK220GCP
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.
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SA-AK220GCP
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. 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 finishthe
work quickly.
3. Take care not to apply excessive stress to the flexible board (FFC).
4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.
Fig 6.1
· 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 placed, 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 electrostatic breakdown. Be sure to
remove the solder from the short point before making connections.
Fig 6.2
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SA-AK220GCP
7 Precaution of Laser Diode
Caution :
This product utilizes a laser diode with the unit turned "ON", invisible laser radiation is emitted from the pick up lens.
Wavelength : 780 nm
Maximum output radiation power from pick up : 100 µW/VDE
Laser radiation from pick up unit is safety level, but be sure the followings:
1. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pick up lens for a long time.
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.
n Use of Caution Labels
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SA-AK220GCP
8 Accessories
Remote Control
Transmitter
FM Indoor Antenna
AC Power Supply Cord
AM Loop Antenna
Power Plug Adaptor
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SA-AK220GCP
9 Operation Procedures
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SA-AK220GCP
10 Disassembly and Assembly of Main Component
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.
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SA-AK220GCP
10.2. Disassembly of Top Cabinet and Rear Panel
Step 1 Remove 3 screws each side and 5 screws at rear panel. Step 4 Draw rear panel forward.
Step 2 Lift up both sides of top cabinet, push the cabinet ass'y
10.2.1. Disassembly for CD Lid
toward the rear and remove it.
(The CD changer unit can be removed after the CD Lid is
removed)
· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel
When 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.
· Disassembly of Rear Panel
Step 3 Press the OPEN/CLOSE button, the disc tray will be
open automatically.
Step 3 Remove 6 screws.
Step 4 Release the 2 claws, and then remove the CD Lid.
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SA-AK220GCP
[Open the disc tray manually (Using service tools)]
Step 5 Press the OPEN/CLOSE button, the disc tray will be
close.
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 open.
Step 2 Release the 2 claws, and then remove the CD lid cover.
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SA-AK220GCP
direction.
Step 4 The disc tray will be close.
Step 3 Repeat Step 2 but rotate the gear tools in anti-clockwise
10.3. Disassembly of CD Mechanism Unit
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly for CD Lid
Step 1 Detach the FFC boards (CN309 & CN310).
Step 3 Remove 4 screws.
Step 4 Remove the CD chassis.
Step 5 Lay the CD mechanism unit as shown.
· Note:
Step 2 Release the claws of both ends, and then lift up the CD For disassembly of CD mechanism unit, please refer to
Mechanism Unit. Section 10.7 of this manual.
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SA-AK220GCP
10.4. Disassembly Main P.C.B., Transformer P.C.B., Voltage Selector P.C.B.
& Power P.C.B.
10.4.1. Disassembly for the Main P.C.B. 10.4.3. Disassembly of the Power P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of · Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly · Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly
for CD Lid for CD Lid
· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of · Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of
the CD Mechanism Unit the CD Mechanism Unit
Step 1 Disconnect FFC board at CN303, CN302 & CN304 . · Follow the (Step 1) - (Step 2) of Item 10.4.1 - Disassembly
for the Main P.C.B.
Step 1 Remove 2 screws.
Step 2 Remove the 2 screws fixed at heat sink.
Step 2 Lift up Main P.C.B. by disconnect CN500 & CN501 as
arrow shown above.
10.4.2. Disassembly of the Transformer NOTE:
P.C.B. & Voltage Selector P.C.B. Insulate Power P.C.B. with insulation material to avoid short
· Follow the (Step 1) - (Step 5) of Item 10.2 - Disassembly of circuit.
Top Cabinet and Rear Panel · Replacement of Power Amplifier IC & Voltage Regulator
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly Step 1 Remove 2 screws (For Power Amp IC) and 1 screw (For
for CD Lid Voltage Regulator) .
· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of
the CD Mechanism Unit
Step 1 Remove 3 screws.
Step 2 Break the joint with a metal cutter as shown below.
Step 2 Disconnect connector CN950.
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SA-AK220GCP
Step 4 Fix back the cutted portion with a screw as shown.
Step 3 Unsolder the terminals of Power Amp IC, transistor and
replace the components.
10.5. Disassembly of Panel P.C.B. & Tact Switch P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly
for CD Lid
· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of
the CD Mechanism Unit
· Disassembly of Panel P.C.B.
Step 1 Lay the unit as shown below.
Step 3 Remove the 8 screws.
Step 4 Disconnect FFC board (CN302).
· Disassembly of Tact Switch P.C.B.
Step 5 Disconnect connector CN900.
Step 2 Remove 2 screws, release 2 claws, and then draw the
front panel ass'y forward.
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SA-AK220GCP
Step 6 Pull out the volume knob.
Step 7 Pull Panel P.C.B. forward.
10.6. Disassembly of Deck Mechanism Unit & Deck P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly
for CD Lid
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of
the CD Mechanism Unit
Step 1 Detach FFC board. (CN971)
Step 2 Disconnect FFC flat cable from the connector
(CN1001).
Step 3 Remove the 5 screws. Step 4 Push the lever upward, and then open the cassette lid
ass'y (For DECK1 and DECK2).
Step 5 Tilt the cassette mechanism unit in the direction of
arrow (1), and then remove it in the direction of arrow (2).
· For replacement of Deck P.C.B.
Step 6 Unsolder the motor terminals.
Step 7 Remove 3 screws.
Step 8 Remove Deck P.C.B.
10.7. CD Mechanism Main Component Replacement Procedures
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly
for CD Lid
· Follow the (Step 1) - (Step 5) of Item 10.3 - Disassembly of
the CD Mechanism Unit
10.7.1. Replacement of the Traverse Deck
Step 1 Remove the CD changer unit.
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SA-AK220GCP
Step 4 With pressing the claw (A), rotate the hexagonal wrench
clockwise. (The slide plate R moves for a little amount.)
Step 5 Pressing the claw (B) in the direction of arrow (1), the
connection lever moves in the direction of arrow (2).
Step 6 Lift up the traverse deck ass'y.
Step 2 Insert the gear with hexagonal wrench into the hole.
Step 3 Rotate the hexagonal wrench in the direction of arrow
(clockwise), and then open the disc tray fully. Step 7 Remove the traverse deck ass'y from the timing lever.
Caution:
When removing or inserting the traverse deck avoid touching
the OPU lens and pressing onto the turntable.
Step 8 Remove 3 screws.
Step 9 Unsolder the motor terminals (4 points).
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SA-AK220GCP
Note:
Be careful not to lose the 3 floating spring because those will
also be removed on removal of the traverse deck ass'y.
· Installation of the CD Servo P.C.B. after replacement
Step 1 Connect the FFC board.
Step 2 Install the CD servo P.C.B. in the traverse deck ass'y.
Step 3 Remove 3 screws.
Step 4 Solder.
Step 10 Remove the FFC board from the connector, and then
remove the CD Servo P.C.B.
· Note for installation of the CD servo P.C.B.
Step 11 Remove the pin.
· Installation for traverse deck ass'y
Step 12 Release the claw, and then remove the traverse deck
ass'y.
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Step 1 Install the traverse deck ass'y to the timing lever.
Step 2 Align the boss of traverse deck ass'y with the slot of
traverse cam gear.
Step 3 Force the claw of timing lever.
Step 5 With pressing the claw (B) in the direction of arrow (1),
force the connection lever in the direction of arrow (2).
10.7.2. Replacement for the Disc Tray
Step 1 Remove 4 screws.
Step 4 Force the disc tray fully.
Step 2 Remove the upper plate.
Step 3 Remove 3 screws.
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SA-AK220GCP
Step 4 With lifting the claw in the direction of (1), draw the CD Step 8 Release the both claws, and then draw the disc tray.
Detect P.C.B. in the direction of arrow (2).
Step 5 Remove the mechanism cover.
Step 6 Insert the gear with hexagonal wrench into the hole. Step 9 With forcing the left guide bar manually because the left
guide bar interfers with claw, draw the disc tray.
[Installation of the disc tray after replacement]
Step 7 Rotate the hexagonal wrench in the direction of arrow,
and then open the disc tray fully.
Step 1 Slide the drive rack fully in the direction of arrow.
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SA-AK220GCP
10.7.3. Disassembly and reassembly for
mechanism base drive unit
Step 1 Remove 3 screws.
Step 2 Holding the drive rack not to move, install the disc tray.
Step 2 Release the claw, and then remove the gear holder.
Step 3 Align the drive rack with the drive gear.
Step 3 Remove the belt and change gear spring.
NOTE:
Take care not to lose the change gear spring.
NOTE: Step 4 Remove the pulley gear, change gear and UP/DOWN
gear.
Force the right guide bar of tray base manually not to move
upwards.
Step 4 Holding the disc tray manually, push the disc tray in the
direction of the arrow.
Step 5 Release the 2 claws, and then remove the bottom SW
P.C.B..
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Step 9 Pressing the claw (B) in the direction of arrow (1), force
the connection lever in the direction of arrow (2).
Step 6 Install the tray lock spring to hook temporary.
Step 7 Release the claw, and then remove the tray lock.
Step 8 Release the claw, and then remove the rear lock.
Step 10 Move the slide plate 1 to the end of stock side.
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SA-AK220GCP
Step 13 Remove the traverse relay gear, traverse cam gear
Step 11 Lift up the left end of spindle base unit in the direction and drive gear.
of arrow (1), and then remove the unit in the direction of arrow
(2).
[Dissassembly/reassembly for the spindle base unit]
Step 1 Draw the 5 disc spacers.
Step 2 Pushing the claw, slide the support plate in the direction
of arrow, and then remove it.
Step 12 Remove slide plate 1 and slide plate 2.
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Step 3 Rotate the disc lever in the direction of arrow (1), draw
the disc lever.
NOTE:
Hold the loading stopper ass'y manually bacause it is flipped by
spring.
NOTE:
Take care not to lose the disc lever spring.
Step 6 Remove the cushion spring.
Step 7 Remove the loading stopper ass'y in the direction of
arrow.
Step 4 Release the 2 claws, and then draw the relay gear B.
Step 5 Release the 2 claws as shown below.
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SA-AK220GCP
Step 8 Release the 2 claws, and then remove the relay gear A.
Step 9 Release the 2 claws, and then remove the spindle shaft.
Step 12 Squeeze the shaft of lower hook, and then draw it.
Step 13 Rotate the lower spindle in the direction of arrow until
Step 10 Remove the lower spindle spring with tweezers.
the lower spindle interferes with stopper.
Step 11 Force the lower hook with thin tip of minus screwdriver.
Step 14 Insert the thin tip of minus screwdriver between the
lower spindle and UP/DOWN base, and then slacken the lower
spindle to release the stopper. Then, rotate the lower spindle
and remove it.
Step 15 Rotate the UP/DOWN base at a 90° angle. Then,
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SA-AK220GCP
spread the hold bars of loading stopper and remove the Step 1 Install the traverse cam gear.
UP/DOWN base. Step 2 Rotate the traverse cam gear to the direction of arrow.
[Installation for loading stopper ass'y]
Step 1 Align the claw of loading stoppers ass'y with the slot of
spindle base. (Caution should be exercised when alignment of
claw due to the size of claws.)
Step 2 Lower the loading stopper ass'y, and then align the
lower spindle with the trapezoid tooth of relay gear A.
Step 3 Install the drive gear and traverse relay gear.
Step 3 Force the loading stopper ass'y, latch the claw firmly.
*When installing the traverse relay gear, align the trapezoid
tooth of gear with tooth of traverse cam gear.
[Reassembly for mechanism base drive unit]
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Step 4 Install the slide plate 2 to the mechanism base, and
then match to the connection lever.
Step 5 Install the slide plate 1 to the mechanism base, and Step 7 Move the slide plate 1 to forward fully.
then match to the connection leve and align the trapezoid tooth Step 8 Install the rear lock. (The claw should be latched.)
of traverse relay gear with the slide plate 1. Step 9 Install the Spindle Position P.C.B.. (The claw should be
latched.)
Step 10 Install the tray lock. (The claw should be latched.)
Step 6 Install the spindle base unit. (First, slide plate 1.)
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Step 14 Install the tray base, traverse ass'y, mechanism cover
and upper plate.
[Operation check after servicing]
Check the proper operation of following items with gear and
hexagonal screwdriver.
1. Open/close of tray base.
2. Moving the tray base to the stock side.
3. UP/DOWN operation of spindle base unit.
4. UP/DOWN operation of traverse ass'y.
10.7.4. Replacement for the motor ass'y
Step 11 Remove the tray lock spring from hook,and then latch
to the tray lock.
Step 12 Install the UP/DOWN gear, change gear, change gear
spring, pulley gear and belt in the order of (1) - (5).
Step 1 Install the belt temporarily.
NOTE:
Take care not apply the grease to the belt.
Step 2 Upset the CD loading unit.
Step 3 Remove 3 screws.
Step 13 Install the gear holder, and then tighten the screw (a).
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10.8. Replacement for the pinch
roller ass'y and head block
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly
for CD Lid
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of
the CD Mechanism Unit
· Follow the (Step 1) of Item 10.4 - Disassembly the Main
P.C.B. & Transformer P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.5 - Disassembly of
the Panel P.C.B. & Tact Switch P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.6 - Disassembly for
the Deck Mechanism Unit & Deck P.C.B.
Step 4 Unsolder the plunger terminals (2 points). * The mechanism as shown below is for DECK1. For the
Step 5 Unsolder the motor terminals (2 points). one of DECK 2, perform the same procedures.
Step 6 Release the 2 claws (A), and then remove the Motor
P.C.B.
Step 7 Release the claw (B), and then remove the motor ass'y.
[Notice for motor ass'y installation]
1. Locate the name plate of motor to the traverse ass'y.
2. Align the hole of motor with the ribs. Step 1 Release the 2 claws, and then remove the pinch roller
(R), (F).
Step 2 Release ther 2 claws, and then remove the head
connector.
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SA-AK220GCP
Step 3 Remove 2 screws.
10.9. Replacement for the Deck motor ass'y, capstan belt A, capstan belt B
and winding belt
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.2.1 - Disassembly
for CD Lid
· Follow the (Step 1) - (Step 2) of Item 10.3 - Disassembly of
the CD Mechanism Unit
· Follow the (Step 1) of Item 10.4 - Disassembly the Main
P.C.B. & Transformer P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.5 - Disassembly of
the Panel P.C.B. & Tact Switch P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.6 - Disassembly for
the Deck Mechanism P.C.B.
Step 1 Release the 2 claws, and then remove the head
connector.
Step 2 De-solder plunger point.
Step 3 Remove the Deck Mechanism P.C.B.
Step 4 Remove 3 screws.
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SA-AK220GCP
Step 5 Remove the flywheel R.
Step 6 Release the claw of tape side, and then remove the
winding lever and spring.
Step 7 Remove the flywheel F.
[Installation of the belt]
Step 1 The boss and marking should be positioned Step 2 Put the winding belt on the pulley temporarily.
horizontally. Step 3 Install the flywheel F.
Step 4 Put the winding belt on the flywheel F.
Step 5 Install the winding lever and spring while pressing the
winding arm in the direction of arrow.
Step 6 Install the flywheel R.
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SA-AK220GCP
Step 7 Put the capstan belt A temporarily as shown below.
Step 10 Remove 3 screws.
Step 11 Put the capstan belt B as shown below.
Step 8 Put the capstan belt B on the motor ass'y pulley.
Step 12 Put the capstan belt A on the motor ass'y pulley.
Step 9 Install the sub chassis to the mechanism, and then
tighten screws.
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SA-AK220GCP
10.10. Replacement for the cassette 10.11. Counter- measure for tape
lid ass'y trouble
· Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of · Follow the (Step 1) - (Step 2) of Item 10.2 - Disassembly of
Top Cabinet and Rear Panel Top Cabinet and Rear Panel
Step 1 Push the lever upward, open the cassette lid ass'y. (For Step 1 If a cassette tape cannot be removed from the deck
DECK1 and DECK2) since the tape is caught by the capstan or pinch roller during
playback or recording, rotate the flywheel F in the direction of
the arrow to remove the tape.
Step 2 Lift up the cassette lid ass'y in the direction of arrow.
(For DECK1 and DECK2).
Step 2 Push the lever upward and open the cassette lid ass'y.
Take the cassette tape off.
Step 3 Remove the cassette lid ass'y. (For DECK1 and
DECK2).
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SA-AK220GCP
11 Service Position
11.1. Checking Procedure
Note:
For the disassembling procedure, see Section 10.
11.2. Checking the Main P.C.B., Power P.C.B., Transformer P.C.B. and
Voltage Selector P.C.B.
1. Disassembly of Top Cabinet and Rear Panel.
2. Disassembly of CD Lid.
3. Disassembly of CD Mechanism Unit.
4. Connect FFC board (CN309 & CN310) from CD Mechanism Unit.
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SA-AK220GCP
11.3. Checking the Panel P.C.B., Tact Switch P.C.B., Deck P.C.B. & Deck
Mechanism P.C.B.
1. Remove Top Cabinet and Rear Panel.
2. Remove CD Lid.
3. Remove CD Mechanism Unit.
4. Remove volume knob at front panel.
5. Remove Panel P.C.B. & Tact Switch P.C.B.
6. Remove Deck Mechanism P.C.B.
7. Use the extension cable (REEX0310 - 10 Pins) to reconnect (CP600) Panel P.C.B. and (CN971) Deck Mechanism P.C.B.
Service Tools
Extension FFC REEX0310
Panewl P.C.B. - Deck Mechanism P.C.B. (10 Pins)
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SA-AK220GCP
12 Description of Error Code
12.1. Abnormality detection for Deck Mechanism block
No. Abnormal Items Error Display Method of Detection
1 MODE SW abnormal H01 Normal operation during mecha transition, MODE SW abnormal is
memorized. The content of abnormality can be confirmed in the
abnormal detection mode explained in the later section.
2 REC INH SW abnormal H02 The contect of abnormality can be confirmed in the abnormal detection
mode explained in the later section.
3 HALF SW abnormal H03 The contect of abnormality can be confirmed in the abnormal detection
mode explained in the later section.
4 Reel pulse abnormal F01 The contect of abnormality can be confirmed in the abnormal detection
mode explained in the later section.
12.2. Abnormality detection for CD/Changer block
No. Abnormal Items Error Display Method of Detection
1 REST SW abnormal F15 Under normal operation (Self-Diagnostic Mode inclusive), this error
occurs when the REST SW ON is not detected within the specified time
and shall be memorized.
2 Transmission error between CD servo F26 Under normal operation (Self-Diagnostic Mode inclusive), this error occurs
LSI and micon when the selection is set to CD and SENSE='H' is detected and
SENSE='L' is not detected within a fail safe time (20ms) after system
command transmission was sent.
3 CLAMP SW abnormal F16 Refer to CR20 control specification section 5-2 [ERROR CODE] table M-
0A error is detected.
4 BOTTOM SW abnormal F17 Refer to CR20 control specification section 5-2 [ERROR CODE] table M-
09 error is detected.
5 POSITION SW abnormal F27 Refer to CR20 control specification section 5-2 [ERROR CODE] table M-05
~ M-08 error is detected.
6 SW1 abnormal F28 Refer to CR20 control specification section 5-2 [ERROR CODE] table M-02
~ M-08 error is detected.
7 SW2 abnormal F29 Refer to CR20 control specification section 5-2 [ERROR CODE] table M-02
~ M-08 error is detected.
8 OPEN SW abnormal H15 Refer to CR20 control specification section 5-2 [ERROR CODE] table M-01
error is detected.
12.3. Power supply related error detection
No. Abnormal Items Error Display Method of Detection
1 POWER AMP output abnormal F61 During normal operation, if DCDET becomes `L', normal POWER OFF
process shall not be executed, PCNT shall be switched to `L'
immediately. GOODBYE shall not be displayed and the error display F61
will be displayed instead.
2 seconds after the F61 display, ECONO shall be set to `L' and FL
display shall be turned off.
The error content shall be memorized when the abnormality occurs and
can be displayed in the C-mecha self-diagnostic mode described later.
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SA-AK220GCP
13 Self-Diagnostic Function
13.1. Self-diagnostic display
This unit is equipped with a self-diagnostic display function which, if a problem occurs, will display an error code corresponding to
the problem.
Use this function when performing maintenance on the unit.
13.2. How to enter the Self-Diagnostic Function
13.3. Cassette Mechanism Test (For error code H01, H02, H03, F01, F02)
1. Press "TAPE, DECK 1/2" to select Deck 2.
2. Load a cassette tape with the erasure prevention tab, remove from left side only and close the cassette holder.
3. Press "FAST FORWARD MEMORY" (Tape will be stop after 2 seconds)
4. Load a cassette tape with the erasure prevention tab, remove from right side only and close the cassette holder.
5. Press "REVERSE FM MODE/BP" (Tape will be stop after 2 seconds)
6. Load a pre-recorded tape with both side record tabs intact and close the cassette holder.
7. Press "PLAY/TUNE/TIME ADJ UP" (After TPS function, tape will stop automatically)
8. Press "REC/STOP" (Tape will not move)
9. Press "STOP/TUNE MODE" to indicate Error code.
· If several problem exist, error code will change each time when "n /STOP" is pressed.
(e.g. H01 H03 F01 .....etc.)
10. Press "TAPE, DECK 1/2" to select Deck 1.
11. Repeat step 2 to 9 to test Deck 1. (Tape Deck 1 will not check H02 because of no recording function)
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SA-AK220GCP
13.4. CD Mechanism Test (F15, F26, F16, F17, F27, F28, F29, H15)
1. Press "CD".
2. Press "OPEN/CLOSE (1)" and place a CD.
3. Press "OPEN/CLOSE (1)" to close the tray.
4. Press "OPEN/CLOSE (5)" and wait until the tray is open.
5. Press "OPEN/CLOSE (1)" and remove the CD.
6. Press "OPEN/CLOSE (1)" to close the tray.
7. Press "n/STOP" to indicate Error Code.
· If several problem exist, error code will change each time when "n/STOP" is pressed. (e.g. F15 F26 F16 ....etc).
13.5. To clear all Error code
1. Press "STOP/TUNE MODE" button for 5 seconds.
2. FL indicator shows "CLEAR" for 1 second and change to "T".
13.6. How to get out from Self-Diagnostic function
1. Press "Power" button OFF.
13.7. Power Amplifier Failure (F61)
1. When power amplifier fail, F61 will indicate automatically.
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SA-AK220GCP
14 CD Test Mode Function
This CD test mode is provided to check CD unit without connecting to changer loading mechanism. This mode shall operate CD
PLAY with CD unit being connected only and CD Automatic Alignment result is shown on FL display.
14.1. How to set CD test mode
14.2. CD Automatically Adjustment result indication
Under CD test mode, pressing the numeric key `0' on the remote controller will display the auto adjustment result. FLOCK, TLOCK
and CLVS status shall be shown as below:
During the above display, executing CD PLAY will display auto adjustment result for CD PLAY mode.
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SA-AK220GCP
15 Measurements and Adjustments
15.1. Cassette Deck Section standard value.
Bias voltage for Deck 2 14±4mV (Normal)
· Measurement Condition Erase voltage for Deck 2 80mV (Normal)
- Make sure head, capstan and press roller are clean.
- Judgeable room temperature 20 ± 5 °C (68 ± 9°F)
· Measuring instrument
- EVM (DC Electronic voltmeter)
- Digital frequency counter
· Test Tape
Fig.2
- Tape speed gain adjustment (3 kHz, -10 dB);
QZZCWAT
15.1.1. Tape Speed Adjustment (Deck 1/2)
1. Set the tape edit button to "NORMAL" position.
2. Insert the test tape (QZZCWAT) to DECK 2 and playback
(FWD side) the middle portion of it.
3. Adjust Motor VR (DECK 2) for the output value shown
below.
Fig.3
Adjustment target: 2940 ~ 3060 Hz (NORMAL speed)
4. After alignment, assure that the output frequency of the 15.1.3. Bias Frequency Adjustment (Deck
DECK 1 FWD are