Panasonic SA-AK110P User manual

■AMPLIFIER SECTION
Power output
10% Total harmonic distortion
60Hz-16kHz, both channels driven
60 W per channel (6 Ω)
Power output
10% Total harmonic distortion
1kHz, both channels driven 80W per channel (6Ω)
Input sensitivity
AUX 250 mV
Input impedance
AUX 13.3kΩ
■FM TUNER SECTION
Frequency range
87.9 - 107.9 MHz (200 kHz steps)
87.5 - 108.0 MHz (100 kHz steps)
Sensitivity 2.5µV (IHF)
S/N 26 dB 2.2 µV
Antenna terminal(s) 75 Ω(unbalanced)
■AM TUNER SECTION
Frequency range 520 - 1710 kHz (10 kHz steps)
Sensitivity
S/N 20 dB (at 1000 kHz) 560 µV/m
■CASSETTE DECK SECTION
Track system 4 track, 2 channel
Heads
© 2002 Matsushita Electronics (S) Pte. Ltd. All rights
reserved. Unauthorized copying and distribution is a
violation of law.
SA-AK110P
Colour
(K)... Black Type
TAPE SECTION :
SG-2W MECHANISM SERIES
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 4.8 cm/s (1 7/8 ips)
Overall frequency response (+3 dB, -6 dB at DECK OUT)
NORMAL (TYPE I) 35 Hz - 14 kHz
S/N 50 dB (A weighted)
Wow and flutter 0.18 % (WRMS)
Fast forward and rewind time Approx. 120 seconds with
C-60 cassette tape
■CD SECTION
Sampling frequency 44.1 kHz
Decoding 16 bit linear
Beam source/wave length Semiconductor laser/780 nm
Number of channels Stereo
Frequency response 20 Hz - 20 kHz (+1, -2 dB)
Wow and flutter Below measurable limit
Digital filter 8fs
D/A converter MASH (1 bit DAC)
■GENERAL
Power supply AC 120 V, 60Hz
Power consumption 165 W
Power Consumption in standby
mode 0.34 W
CD Stereo System
Specifications
ORDER NO. MD0211231C1
A6

Dimensions (W x H x D) 250 x 330 x 370 mm
(9 27/32” x 13” x 14 3/8 “)
Mass 7.0 kg (15.4 lb.)
■SYSTEM
SC-AK110 (P) Music center: SA-AK110 (P)
Speaker: SB-AK110 (P)
1 Safety Precaution 3
2 Before Repair and Adjustment 3
3 Protection Circuitry 4
4 Accessories 4
5 Handling Precautions For Traverse Deck 5
6 Precaution of Laser Diode 6
7 Operation Procedures 7
8 Operation Checks and Component Replacement Procedures
8
9 Self-Diagnostic Function 35
10 Description of Error Code 36
Notes:
1.Specifications are subject to change without notice. Mass and
dimensions are aproximate.
2.Total harmonic distortion is measured by the digital spectrum
analyzer.
11 CD Test Mode Function 37
12 Measurements and Adjustments 38
13 Illustration of IC’s, Transistors and Diodes 40
14 Terminal Function of IC’s 41
15 Block Diagram 44
16 Schematic Diagram 51
17 Printed Circuit Board 65
18 Wiring Connection Diagram 75
19 Troubleshooting Guide 76
20 Parts Location and Replacement Parts List 77
CONTENTS
Page Page
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(This “Safety Precaution” is applied only in U.S.A.)
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.
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 rechecked before it is returned to the
customer.
Fig.1
Fig.2
1 Safety Precaution
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
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C520 and C540 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 should be ~600mA.
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4 Accessories
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.
Remote Control
Transmitter
FM indoor antenna
AC power supply cord
AM Loop antenna
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5 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.
• 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 laer diode against electroststics breakdown. Be sure to
remove the solder from the short point before making connections.
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This unit utilizes a class 1 laser.
Invisible laser radiation is emitted from the optical pickup lens.
When the unit is turned on:
■Use of caution label
6 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.
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7 Operation Procedures
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Some chassis components may have sharp edges.
Be careful when disassembling and servicing.
8 Operation Checks and Component Replacement
Procedures
“ATTENTION SERVICER”
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.
Warning:
This product uses a laser diode. Refer to caution statement Precaution of Laser Diode.
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Step 1 Remove 3 screws each side and 5 screws at rear panel.
Step 2 Lift up both sides of cabinet ass’y, push the cabinet
ass’y toward the rear and remove the cabinet ass’y.
(The CD changer unit can be removed after the CD Lid is
removed)
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.
Step 3 Press the OPEN/CLOSE button, the disc tray will be
open automatically.
• Checking the Main P.C.B. as shown below.
8.2.1. Disassembly for the CD Lid
Step 4 Release the 2 claws, and then remove the CD Lid.
8.1. Checking for Main P.C.B.
8.2. Disassembly for the CD changer ass’y
• Follow the (Step 1) - (Step 2) of Item 8.1.
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Step 5 Press the POWER button to turn the power on.
Step 6 Press the OPEN/CLOSE button, the disc tray will be
close.
[Open the disc tray manually (Using service tools)]
Step 1 Upset the unit as shown below.
Step 2 Insert the gear tool into the hole on the underside of CD
chasis and then rotate in the direction of arrow. The disc tray
will be open.
Step 3 Release the 2 claws, and then remove the CD lid cover.
Step 4 Push the disc tray.
8.2.2. Disassembly for CD changer unit
• Follow the (Step 1) - (Step 2) of Item 8.1.
• Follow the Disassembly for the CD Lid of Item 8.2.1.
Step 1 Remove 2 screws at rear cabinet as show below.
Step 2 Lift up the mechanism unit cover, and then push in the
mechanism unit cover.
Step 3 Release the claws of both ends, and then lift up the CD
changer unit.
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Step 4 Upset the CD changer unit.
Step 5 Place the CD changer unit on the unit.
(Place the unit horizontally when loading the CD changer unit.)
8.3.1. Initial setting of CD
• Follow the (Step 1) - (Step 2) of Item 8.1.
• Follow the Disassembly for the CD Lid of Item 8.2.1.
Step 1 Connect the AC power cord.
Step 2 Press POWER button to turn on power for main unit.
Step 3 Select the input select button to “CD”.
Step 4 Push the OPEN/CLOSE button, and then open the disc
tray.
<The preparation of checking procedures in operational
condition is completed>
Step 5 Put the CD into the disc tray.
Step 6 Press the OPEN/CLOSE button 1, and then close the
8.3. Checking for the unit operational condition
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disc tray. (Then, the CD will load.)
<The initial setting of CD unit is completed.>
8.3.2. Checking for the CD Servo P.C.B.,
Panel P.C.B., Deck P.C.B.,
Transformer P.C.B. and Power
P.C.B.
• Follow the (Step 1) - (Step 2) of Item 8.1.
• Follow the Disassembly for the CD Lid of Item 8.2.1.
• The initial setting of CD unit must be completed. (Refer to
the initial setting of CD unit in Item 8.3.1).
• Check for CD Servo P.C.B.
• The initial setting of CD unit must be completed. (Refer to
the initial setting of CD unit in item 8.3.1.)
Step 1 Push the power button and the power turns OFF.
Step 2 Remove the FFC boards.
Step 3 Remove the CD changer unit.
Step 4 Remove 4 screws.
Step 5 Remove the mechanism unit cover.
• Check the CD Servo P.C.B. as shown below
Step 6 Lay the unit.
Step 7 Connect the FFC board (19 pin) from CD servo P.C.B..
Step 1 Press the POWER button and the power turns off.
Step 2 Remove the connectors.
Step 3 Pull out the FFCs.
Step 4 Remove the CD changer unit.
Step 5 Lay the unit as shown below.
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Step 6 Remove 2 screws.
Step 7 Release the 2 claws, and then draw the front panel
ass’y.
• Check the Panel P.C.B., Deck P.C.B. and Transformer
P.C.B. as shown below
Step 8 Release the 6 screws, and then remove the rear cover.
• Checking the Power P.C.B. as shown below
• Follow the (Step 1) - (Step 2) of Item 8.1.
• Follow the (Step 1) - (Step 6) of Disassembly for the CD Lid
of Item 8.2.1.
• Follow the (Step 1) - (Step 8) of Checking for Panel
P.C.B.,Deck P.C.B., Transformer P.C.B. and Power P.C.B.
of Item 8.3.2.
NOTE:
Insulate Power P.C.B. with insulation material to avoid short
circuit.
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8.3.3. Replacement of the Power
Amplifier IC
• Checking the Power P.C.B.
• Follow the (Step 1) - (Step 2) of Item 8.1.
Step 1 Remove the 2 screws fixed to the Power Amplifier IC.
Step 2 Remove 2 screws fixed to the Power Amplifier IC and
Transistor Holders.
Step 3 Break the joint with a metal cutter as shown below.
8.4.1. Replacement of the Traverse Deck
• Follow the (Step 1) - (Step 2) of Item 8.1.
• Follow the (Step 1) - (Step 6) of Disassembly for the CD Lid
of Item 8.2.1.
• Follow the disassembly instruction for the CD changer unit
of Item 8.2.2.
Step 1 Push the power button and the power turns OFF.
Step 4 Unsolder the terminals of Power Amp IC, transistor and
replace the component.
Step 5 Fix back the bottom chasis with a screw as shown.
Step 2 Remove the FFC boards.
Step 3 Remove the CD changer unit.
8.4. Main Component Replacement Procedures
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Step 4 Insert the gear with hexagonal wrench into the hole.
Step 5 Rotate the hexagonal wrench in the direction of arrow
(clockwise), and then open the disc tray fully.
Step 6 With pressing the claw (A), rotate the hexagonal wrench
clockwise. (The slide plate R moves for a little amount.)
Step 7 Pressing the claw (B) in the direction of arrow (1), the
connection lever moves in the direction of arrow (2).
Step 8 Lift up the traverse deck ass’y.
Step 9 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 10 Remove 3 screws.
Step 11 Unsolder the motor terminals (4 points).
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Step 12 Remove the FFC board from the connector, and then
remove the CD Servo P.C.B.
Step 13 Remove the pin.
Step 14 Release the claw, and then remove the traverse deck
ass’y.
Note:
Be careful not to lose the 3 floating spring because those will
also be removed on removal of the traverse deck ass’y.
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• 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.
• Note for installation of the CD servo P.C.B.
• Installation for traverse deck ass’y
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 4 Force the disc tray fully.
Step 5 With pressing the claw (B) in the direction of arrow (1),
force the connection lever in the direction of arrow (2).
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• Follow the (Step 1) - (Step 2) of Item 8.1
• Follow the Disassembly for the CD Lid of Item 8.2.1.
• Follow the Disassembly for the CD Changer Unit of Item
8.2.2.
• Follow the (Step 1) - (Step 8) of Item 8.4
Step 1 Remove 4 screws.
Step 2 Remove the upper plate.
Step 3 Remove 3 screws.
Step 4 With lifting the claw in the direction of (1), draw the
clamp SW 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 7 Rotate the hexagonal wrench in the direction of arrow,
and then open the disc tray fully.
Step 8 Release the both claws, and then draw the disc tray.
8.5. Replacement for the disc tray
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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 1 Slide the drive rack fully in the direction of arrow.
Step 2 Holding the drive rack not to move, install the disc tray.
Step 3 Align the drive rack with the drive gear.
NOTE:
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.
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• Follow the (Step 1) - (Step 2) of Item 8.1.
• Follow the Disassembly for the CD Lid of Item 8.2.1.
• Follow the Disassembly for the CD changer unit of Item
8.2.2.
• Follow the (Step 1) - (Step 14) of Item 8.4
• Follow the (Step 1) - (Step 9) of Item 8.5
Step 1 Remove 3 screws.
Step 2 Release the claw, and then remove the gear holder.
Step 3 Remove the belt and change gear spring.
NOTE:
Take care not to lose the change gear spring.
Step 4 Remove the pulley gear, change gear and UP/DOWN
gear.
Step 5 Release the 2 claws, and then remove the bottom SW
P.C.B..
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.
8.6. Disassembly and reassembly for mechanism base drive unit
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