Panasonic SA-AK250E Service Manual
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Panasonic SA-AK250E Service Manual

Panasonic SA-AK250E Service Manual

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Notes: This model's CD mechanism changer unit is CRS1. Please refer to the original Service Manual
(Order No. MD0509368C0) for this mechanism.
Specifications
RMS output power
THD 10%, both channels driven
1 kHz
Total output power
n FM/AM TUNER, TERMINALS SECTION
Preset station
Frequency Modulation (FM)
Frequency range
Sensitivity
S/N 26 dB
Antenna terminal(s)
Amplitude Modulation (AM)
Frequency range
Sensitivity
S/N 20 dB (at 999 kHz)
Music Port input jack
Terminal
Sensitivity
Phone jack
Terminal
n CASSETTE DECK SECTION
Track system
Heads
50 W per channel (3 Ω)
100 W
FM 20 stations
AM 15 stations
87.5 to 108.0 MHz (50 kHz steps)
4.0 µV (IHF)
2.2 µV
75 Ω (unbalanced)
522 to 1629 kHz (9 kHz step)
560 µV/m
Stereo, 3.5 mm jack
100 mV, 4.7 kΩ
Stereo, 3.5 mm jack
4 track, 2 channel
SA-AK250E
SA-AK250EB
SA-AK250EG
SA-AK250EE
Colour
(S)... Silver Type
Record/playback
Erasure
Motor
Recording system
Erare system
Tape speed
Overall frequency response (+3, -6 dB) at DECK OUT
NORMAL
S/N Ratio
Wow and flutter
Fast forward and rewind time
n DISC SECTION
Disc played [8 cm or 12 cm]
(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
Sampling frequency
MP3
CD-DA
© 2007 Matsushita Electric Industrial Co. Ltd.. All
rights
reserved.
distribution is a violation of law.
ORDER NO. MD0704052CE
CD Stereo System
Solid permalloy head
Double gap ferrite head
DC servo motor
AC bias 100 kHz
AC erase 100 kHz
35 Hz to 14 kHz
50 dB (A weighted)
0.18 % (WRMS)
Approx. 120 seconds with
C-60 cassette tape
32 kbps to 320 kbps
32 kHz, 44.1 kHz, 48 kHz
Unauthorized
copying
4.8 cm/s
44.1 kHz
and

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Summary of Contents for Panasonic SA-AK250E

  • Page 1 ORDER NO. MD0704052CE CD Stereo System SA-AK250E SA-AK250EB SA-AK250EG SA-AK250EE Colour (S)... Silver Type Notes: This model’s CD mechanism changer unit is CRS1. Please refer to the original Service Manual (Order No. MD0509368C0) for this mechanism. Specifications RMS output power...

  • Page 2: Table Of Contents

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Decoding 16 bit linear (For EB only) 7.1 kg Digital filter 8 fs Operating temperature range +5 to +35°C D/A converter MASH (1 bit DAC) Operating humidity range 5 to 90% RH (no condensation)
  • Page 3 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 13 Procedure for Checking Operation of Individual Parts of Deck 19.3. (C) Panel Circuit Mechanism Unit 19.4. (D) Sub Panel Circuit & (G) Deck Mechanism Circuit 13.1. Operation Check with Cassette Tape 19.5. (E) Power Circuit 13.2.

  • Page 4: Safety Precautions

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 1 Safety Precautions 1.1. General Guidelines 1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

  • Page 5: Caution For Ac Mains Lead

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 1.2. Caution for AC Mains Lead 1.3. Before repair and adjustment Disconnect AC power, discharge Power Capacitors C5101, C5104, C5171, C5172, C5920, C5940 and C5950 through a 10Ω, 5W...

  • Page 6: Protection Circuitry

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 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.
  • Page 7 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 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.

  • Page 8: Handling Precautions For Traverse Unit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 3 Handling Precautions For Traverse Unit The laser diode in the traverse unit (with optical pickup) may break down due to potential difference caused by the static electricity of clothes or our human body.
  • Page 9 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 10: Precaution Of Laser Diode

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 4 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.

  • Page 11: About Lead Free Solder (Pbf)

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 5 About Lead Free Solder (PbF) 5.1. Service caution based on legal restrictions 5.1.1. General description about Lead Free Solder (PbF) The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation.

  • Page 12: Accessories

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 6 Accessories Note: Refer to “Replacement Parts List” (Section 24) for part number. Remote Control FM Antenna Wire AC Cord (For E/ EG/ EE only) AC Cord (For EB only) AM Loop Antenna...

  • Page 13: Operating Procedures

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 7 Operating Procedures 7.1. Main Unit Key Buttons Operations 7.2. Remote Control Key Buttons Operations...

  • Page 14: New Features

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 8 New Features 8.1. Using the Music Port This feature enables you to enjoy music from a portable audio equipment. With reference to page 15 of the operating instruction manual.

  • Page 15: Self Diagnosis And Special Mode Setting

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 9 Self diagnosis and special mode setting This unit is equipped with functions for checking and inspecting namely: Self-Diagnostic and Test Mode. 9.1. Service Mode Summary Table The service modes can be activated by pressing various button combination on the main unit and remote control unit. Below is the...
  • Page 16 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...
  • Page 17 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 9.2.1. EEPROM Checksum (ROM Correction) Purpose: To check for microprocessor firmware version and EEPROM checksum (ROM correction).

  • Page 18: Reliability Test Mode (Crs1 Mechanism)

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Below are the procedures for this mode. Step 1: Enter into Doctor mode (for more information, refer to section 9.2 on the key operation to enter into this mode. Step 2: Check for firmware version and EEPROM checksum (By pressing STOP button on main unit followed by “4” and “7” on remote control).
  • Page 19 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 20: Error Code Table Display

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 9.4. Error code Table Display Self-Diagnosis Function (refer Section 9.2) provides information on any problems occuring for the unit and its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared.
  • Page 21 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 9.4.2. Error Code Table For CD Changer Block...
  • Page 22 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...
  • Page 23 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...
  • Page 24 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 9.4.3. Error Code Table For Power Supply 9.4.4. CRS1 Error Code display CRS1 Error Code display 1. The errors that occured in CRS1 Mechanism can be recalled and displayed, in the order of the occurence under self-diagnostic for procedures to enter this mode.

  • Page 25: Assembling And Disassembling

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10 Assembling and Disassembling 10.1. Caution Special Note: This model uses a new CD changer unit CRS1. In this following section does not contain the necessary disassembly & assembly information for the CD changer unit (CRS1) except the disasembly & assembly of traverse unit. Kindly refer to the original service manual for the CD changer unit.

  • Page 26: Disassembly Flow Chart

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.2. 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.

  • Page 27: Main Parts Location

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.3. Main Parts Location...

  • Page 28: Disassembly Of Top Cabinet

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.4. Disassembly of Top Cabinet Step 1 Remove 3 screws on both sides on top cabinet. Step 2 Remove 5 screws at the rear. Step 3 Lift the sides of top cabinet outwards.

  • Page 29: Disassembly Of Rear Panel

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Step 4 Lift the CD changer unit upwards to remove it. Step 5 Remove 2 screws. · Disassembly of Mecha Chassis Step 6 Remove the Mecha Chassis. Note: For disassembly & assembly of traverse unit, please refer to section 10.15 of this service manual.

  • Page 30: Disassembly Of Main P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.7. Disassembly of Main P.C.B. · Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 4) of Item 10.6 Step 1 Detach FFC cables at connectors (CN2803 &...

  • Page 31: Disassembly Of Power P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.9. Disassembly of Power P.C.B. · Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 4) of Item 10.6 ·...

  • Page 32: Disassembly For Panel P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Step 4 Release 2 claws outwards. Step 3 Bent the front panel unit slightly forward as arrow shown. Step 5 Remove the front panel unit. Note: Ensure 2 claws located at the bottom chassis is seated into the 2 slots at bottom of front panel at 2 catches (one on each side) of bottom chassis to be aligned to front panel’s slot.

  • Page 33: Disassembly Of Tact Switch P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Step 2 Remove Lid. Note: Do not misplace the spring. 10.12. Disassembly of Tact Switch P.C.B. · Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 ·...

  • Page 34: Disassembly Of Traverse Unit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Step 1 Remove 2 screws. Step 2 Desolder wire at deck motor terminals. Step 3 Remove Deck P.C.B. 10.15. Disassembly of Traverse Unit · Follow the (Step 1) - (Step 5) of Item 10.4 ·...

  • Page 35: Disassembly For Deck Mechanism

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Step 3: Remove the traverse unit as arrow shown. · Assembly of Traverse Unit Step 2: Push the traverse slide plate as arrow shown to lock the traverse unit. Step 1: Turn over the unit and install the traverse unit.
  • Page 36 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.16.1. Replacement of Pinch Roller and Head Block...
  • Page 37 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.16.2. Replacement of Motor, Capstan Belt A, Capstan Belt B, and Winding Belt...

  • Page 38: Disassembly Of Deck Mechanism P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.17. Disassembly of Deck Mechanism P.C.B. · Follow the (Step 1) - (Step 4) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 ·...

  • Page 39: Disassembly Of Cassette Lid

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 10.18. Disassembly of cassette lid · Follow the (Step 1) - (Step 4) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 ·...
  • Page 40 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Note: Follow 10.18 Disassembly of cassette lid (Step1) to (Step 3). Remove the cassette tape.

  • Page 41: Service Fixture And Tools

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 11 Service Fixture and Tools Service Tools Extension FFC (A) Deck P.C.B. - Main P.C.B. REEX0485 (14 Pins) 12 Service Positions Note: For description of the disassembly procedures, see the Section 10. 12.1. Checking and Repairing of Main P.C.B.

  • Page 42: Checking And Repairing Of Transformer P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 12.2. Checking and Repairing of Transformer P.C.B. 12.3. Checking and Repairing of Panel, Deck & Deck Mechanism P.C.B.

  • Page 43: Checking And Repairing Of Power P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 12.4. Checking and Repairing of Power P.C.B.

  • Page 44: Procedure For Checking Operation Of Individual Parts Of Deck Mechanism Unit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 13 Procedure for Checking Operation of Individual Parts of Deck Mechanism Unit 13.1. Operation Check with Cassette Tape 1. Pull up the EJECT lever using a rubber band. (Fig. 6) 2. Supply DC5V to MOTOR. (→ MOTOR rotates.) (Fig. 5) 3.
  • Page 45 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 46: Measurement And Adjustments

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 14 Measurement And Adjustments 14.1. Cassette Deck Section 14.1.1. Requirements · Test tape (QZZCFM) (QZZCWAT) · Normal blank cassette tape (QZZCRA) · Digital frequency counter · Oscilloscope · Electrical voltmeter · Headphone jack output jig (Fig 8) 14.1.2.

  • Page 47: Bias Voltage Check

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Fig. 10 Fig. 11 14.1.5. Bias Voltage Check 1. Connect an electrical voltmeter. (Fig 12) (Fig 9 for location of test points) 2. Set the function to “TAPE” position. 3. Insert a normal blank cassette tape (QZZCRA).

  • Page 48: Voltage And Waveform Chart

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 15 Voltage and Waveform Chart Note: Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point, because it may differ from an actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.

  • Page 49: Main P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 15.3. Main P.C.B.

  • Page 50: Panel P.c.b. And Transformer P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 15.4. Panel P.C.B. and Transformer P.C.B. 15.5. Power P.C.B.

  • Page 51: Waveform Chart

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 15.6. Waveform Chart...

  • Page 52: Wiring Connection Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 16 Wiring Connection Diagram 9 ..1 CN3601 H5104 CN2810 TO TUNER PACK MOTOR CN2809 POWER P.C.B. SOLDER SIDE CN2801 MAIN P.C.B. SOLDER SIDE RIGHT SPEAKER TO CRS1 JK5103...

  • Page 53: Block Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 17 Block Diagram 17.1. CD Servo Diagram OPTICAL PICKUP SEMICONDUCTOR LASER TO MAIN STAT CN7002 CN2801 (1/2) Q7601 LASER CN7002 CN2801 POWER DRIVE CN7002 CN2801 TO MAIN (2/2) MCLK CN7002 CN2801 MDATA CN7002 CN2801...

  • Page 54: Deck/ Deck Mechanism Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 17.2. Deck/ Deck Mechanism Diagram IC1001 AN7326K DECK R/P IC (DECK 1) .B. HEAD Q1101 MUTE SWITCH TO MAIN (1/2) (DECK 2) Q1201 Q1302 HEAD MUTE MUTE SWITCH SWITCH DRIVER L1301 Q1309,Q1310 Q1304...

  • Page 55: Main Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 17.3. Main Diagram IC2803 C1BB00001121 AUDIO SOUND PROCESSOR IC2804 C0AABB000125 OP-AMP IN-L1 L-OUT FROM DECK IN-R1 R-OUT IN-L2 Q2311 Q2411 Q2142 Q2317 Q2417 FROM POWER TO TUNER PACK MUTE MUTE AGC CONTROL MUTE...
  • Page 56 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE FROM USB FROM CD SERVO 5.3V 3.3V 3.3V FROM POWER IC2871 E-EPROM IC X2802 X2801 (NOT SUPPLIED) IC2801 RDS_DA RDS_DA C2CBYY000482 MICROPROCESSOR RDS_CLK RDS_CLK SW_LVL1 SW_LVL2 MUTEA MUTE_A IDCDET ASPDA ASPCLK Q2937 Q2936...

  • Page 57: Panel Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 17.4. Panel Diagram FL6602 A2BD00000172 FL DISPLAY 5-11 25-40 TRANSFORMER 31-41 14-29 IC6601 C0HBB0000057 FL DRIVER TO MAIN (2/2) Z6481 REMOTE SENSOR JK6751 TO MAIN MUSIC PORT (1/2) S6201-S6207 TO MAIN (2/2) JK6551...

  • Page 58: Power Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 17.5. Power Diagram JK5103 IC5301 SPEAKER C1BA00000487 2CH DIGITAL AMP L5301 OUT1 10 IN1+ OUT2 14 TO MAIN IN1- SPEAKERS (1/2) IN2+ IN2- Q5153 MODE 1 OSC SWITCH VDDA1 20 TO MAIN (2/2)

  • Page 59: Transformer Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 17.6. Transformer Diagram T5950 D5950-D5953 TO POWER FP5950 D5954-D5957 Q5951 VOLTAGE REGULATOR Q5953 RL5950 PCONT SWITCH TO PANEL Q5952 T5951 SYNCHRONISATION SWITCH D5966 JK5950 L5950 Z5950 D5961, Q5950 D5962 D5964 VOLTAGE REGULATOR SIGNAL LINES...
  • Page 60 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 61: Notes Of Schematic Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 18 Notes Of Schematic Diagram (All schematic diagrams may be modified at any time with : FM/AM Signal line the development of new technology) : Tape Record Signal line Notes: S971: Mode switch.
  • Page 62 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 63: Schematic Diagram

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19 Schematic Diagram 19.1. (A) CD Servo Circuit SCHEMATIC DIAGRAM - 1 CD SERVO CIRCUIT OPTICAL PICKUP CIRCUIT : + B SIGNAL LINE : CD DA SIGNAL LINE : CD SIGNAL LINE (FOR REFERENCE ONLY)

  • Page 64: Main Circuit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19.2. (B) Main Circuit SCHEMATIC DIAGRAM - 2 MAIN CIRCUIT : TAPE PLAYBACK SIGNAL LINE : FM/AM SIGNAL LINE : MAIN SIGNAL LINE : AUX SIGNAL LINE : +B SIGNAL LINE : CD SIGNAL...
  • Page 65 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE SCHEMATIC DIAGRAM - 3 MAIN CIRCUIT : +B SIGNAL LINE : TAPE RECORD SIGNAL LINE : MAIN SIGNAL LINE Q2317,Q2417 W587 B1ABCF000176 MUTING SWITCH CN2809 C2437 F_HOP R2316 4700p 2.2k T-GND R2437 TO MAIN SECTION (1/4)
  • Page 66 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE SCHEMATIC DIAGRAM - 4 MAIN CIRCUIT : +B SIGNAL LINE : CD SIGNAL LINE : FM/AM SIGNAL LINE : MAIN SIGNAL LINE : AUX SIGNAL LINE R2284 W617 R2285 D2811 W658 B0ADCJ000020 R2894 R2121 3.3k...
  • Page 67 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE SCHEMATIC DIAGRAM - 5 MAIN CIRCUIT : +B SIGNAL LINE : MAIN SIGNAL LINE : AUX SIGNAL LINE : USB SIGNAL LINE TO MAIN SECTION (2/4) IDCDET 0.1u C2940 Q2942 R2940 B1ACKD000006 820k...

  • Page 68: C) Panel Circuit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19.3. (C) Panel Circuit SCHEMATIC DIAGRAM - 6 PANEL CIRCUIT :+B SIGNAL LINE : MAIN SIGNAL LINE : AUX SIGNAL LINE TRANSFORMER CIRCUIT (CN5951) IN SCHEMATIC DIAGRAM-11 H6555 W911 R6631 D6301 B0ACCK000005 GND2...

  • Page 69: D) Sub Panel Circuit & (G) Deck Mechanism Circuit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19.4. (D) Sub Panel Circuit & (G) Deck Mechanism Circuit SCHEMATIC DIAGRAM - 7 SUB PANEL CIRCUIT DECK MECHANISM CIRCUIT :+B SIGNAL LINE :+B SIGNAL LINE DECK (CP1902) ON SCHEMATIC DIAGRAM-10 CS971 GND2...

  • Page 70: E) Power Circuit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19.5. (E) Power Circuit SCHEMATIC DIAGRAM - 8 POWER CIRCUIT : +B SIGNAL LINE : +B SIGNAL LINE : MAIN SIGNAL LINE Q5154 Q5173 R5154 W679 B1ABCF000176 2SB0709AHL R5153 PCONT SWITCH SWITCH R5148...
  • Page 71 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE SCHEMATIC DIAGRAM - 9 POWER CIRCUIT : MAIN SIGNAL LINE : +B SIGNAL LINE : -B SIGNAL LINE RIGHT + RIGHT - SPEAKERS LEFT+ LEFT- JK5103 C5344 0.015 C5434 L5601 0.015 G0B9R5K00001 C5439 0.015...

  • Page 72: F) Deck Circuit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19.6. (F) Deck Circuit SCHEMATIC DIAGRAM - 10 DECK CIRCUIT : TAPE RECORD SIGNAL LINE : TAPE PLAYBACK SIGNAL LINE : +B SIGNAL LINE C1105 470P R1103 C1122 0.01 R1101 C1104 0.027 CP1301...

  • Page 73: H) Transformer Circuit

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 19.7. (H) Transformer Circuit SCHEMATIC DIAGRAM - 11 TRANSFORMER CIRCUIT :+B SIGNAL LINE FP5940 C5940 50V1000u C5960 0.1u +VCC1 C5920 50V1000u +VCC1 FP5920 -VCC1 POWER CIRCUIT T5950 -VCC1 (H5104) IN G4CYAYY00136 SCHEMATIC MAIN TRANSFORMER...
  • Page 74 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 75: Printed Circuit Board

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20 Printed Circuit Board Note: Circuit board diagrams may be modified at any time with the development of new technology.

  • Page 76: A) Cd Servo P.c.b., (F) Deck P.c.b. & (G) Deck

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20.1. (A) CD Servo P.C.B., (F) Deck P.C.B. & (G) Deck Mechanism P.C.B. CD SERVO P.C.B (REPV0111A) DECK P.C.B (REPV0134B) (RF) TP51 C7227 W1930 W7014 Q1309 CN1305 Q1310 C7204 W7015 W1909 W1935 C7226...

  • Page 77: B) Main P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20.2. (B) Main P.C.B. MAIN P.C.B (REPV0130P...E/EB/EG) (REPV0130Q...EE) FOR E/EB/EG ONLY W565 W571... E/EB/EG L2962 R2447 C2705 R2702 C2969 R2941 W570... R2446 C2941 C2312 L2961 Q2441 R2705 R2703 W277 R2944 R2315 C2703 R2964...

  • Page 78: C) Panel P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20.3. (C) Panel P.C.B. PANEL P.C.B (REPV0131J) S6201 S6103 (CD1) (OPEN/CLOSE) S6202 S6102 (CD2) (MULTI CHANGE) W805 R6632 S6203 R6105 (CD3) L6553 S6104 (SINGLE CHANGE) L6551 W872 R6458 S6204 (CD4) W840 R6199 L6552...

  • Page 79: D) Sub Panel P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20.4. (D) Sub Panel P.C.B. SUB PANEL P.C.B (REPV0131J) JW6001 S6304 S6305 (TUNER/ R6302 R6303 FM/AM) (MUSIC PORT) VR6491 R6304 S6302 S6303 (CD) (TAPE) W960 W750 W968 R6305 C6491 C6492 W971 R6492 W757...

  • Page 80: E) Power P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20.5. (E) Power P.C.B. POWER P.C.B (REPV0133D) H5104 W701 C5171 W602 W714 C5102 C5103 C5172 R5203 W662 W697 R5201 W698 R5202 Q5202 C5204 W700 C5203 W691 C5202 W737 W638 R5207 Q5201 C5301 C5302...

  • Page 81: H) Transformer P.c.b

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 20.6. (H) Transformer P.C.B. TRANSFORMER P.C.B (REPV0132L) T5951 250V T1.6AL (SUB TRANSFORMER) L5950 C5953 Q5950 J5955 R5952 Z5950 C5951 D5986 C5952 D5952 RL5950 C5954 JK5950 Q5952 W5914 Q5953 W5915 CN5951 R5958 AC IN ~...
  • Page 82 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 83: Illustration Of Ics, Transistors And Diodes

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 21 Illustration of ICs, Transistors and Diodes C0AABB000125 C0CBAHG00011 C1AA00000612 C0DBZGC00067 C1BB00001121 (100P) MN6627954MA (100P) C0HBB0000057 (44P) C2CBYY000482 (100P) CNB13030R2AU C0DAZYY00005 AN7326K (26P) BA5948FPE2 C1BA00000487 (24P) C1AB00002751 (16P) C0JBAB000011 (14P) B1ADCF000001 2SB0709AHL B1AAKD000014...

  • Page 84: Terminal Function Of Ic's

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 22 Terminal Function of IC's 22.1. IC7001 (MN6627954MA) Servo Processor,Digital Signal Processor/Digital filter and D/A Converter Pin No. Mark Function Pin No. Mark Function DRAM address signal O/P 11 DSLF Loop Filter Terminal (For DSL)

  • Page 85: Ic7002 (Ba5948Fpe2) Ic 4Ch Drive

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 22.2. IC7002 (BA5948FPE2) IC 4CH Drive Pin No. Mark Function Pin No. Mark Function Motor Driver 92 Input Motor Drive (3) reverse - action output Turntable Motor Drive Signal (“L”:ON) Motor Drive (3) forward - action...
  • Page 86 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Pin No. Mark Function CD_RST CD Reset output CLOSE_SW CLOSE switch for CRS1 OPEN_SW Open switch for CRS1 CRS1 motor CW CRS1 motor CCW ST_SW Stock switch for CRS1 PLAY_SW Play switch for CRS1...

  • Page 87: Exploded Views

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 23 Exploded Views 23.1. Cabinet Parts Location...
  • Page 88 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE...

  • Page 89: Deck Mechanism Parts Location (Raa4403-S)

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 23.2. Deck Mechanism Parts Location (RAA4403-S)

  • Page 90: Packaging

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 23.3. Packaging...

  • Page 91: Replacement Parts List

    SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE 24 Replacement Parts List Notes: · Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardent (resistors), high-quality sound (capacitors), low noise (resistors), etc are used.
  • Page 92 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks RXL0126 WINDING ARM ASS’Y Q2242 B1ABCF000176 TRANSISTOR [M]E/ EB/ EG RXQ0412-3 HEAD PANEL ASS’Y Q2311...
  • Page 93 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks D5107 B0BA01500003 DIODE CN2803 K1MN21A00005 21P CONNECTOR D5109 B0BA01100004 DIODE CN2805 K1MN14A00049 15P FFC CONNECTOR...
  • Page 94 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks W613 ERJ3GEY0R00V CHIP JUMPER FUSE HOLDER W614 ERJ6GEY0R00V CHIP JUMPER W615 ERJ3GEY0R00V CHIP JUMPER EYF52BCY...
  • Page 95 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks W712 ERJ3GEY0R00V CHIP JUMPER RPFX0198 MIRAMAT SHEET W744 D0GBR00JA008 CHIP JUMPER [M]E/ EB/ EG ACCESSORIES...
  • Page 96 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R2104 D0GB273JA007 27K 1/16W R2401 D0GB153JA007 15K 1/16W R2111 D0GB222JA041 2.2K 1/16W R2411 D0GB471JA008 470 1/16W...
  • Page 97 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R2844 D0GB222JA041 2.2K 1/16W R5136 D0AE2R2JA048 2.2 1/4W R2845 D0GB101JA007 100 1/16W R5137 D0AE2R2JA048 2.2 1/4W...
  • Page 98 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R6306 D0GB222JA041 2.2K 1/16W C1204 F1H1E273A002 0.027 25V R6307 D0GB272JA007 2.7K 1/16W C1205 F1H1H471A219 470P 50V...
  • Page 99 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C2315 F2A1H220A216 22 50V C2965 ECJ1VC1H102J 1000P 50V [M]E/ EB/ EG C2321 F1H1A105A025 1 10V...
  • Page 100 SA-AK250E / SA-AK250EB / SA-AK250EG / SA-AK250EE Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C5322 ECJ1VB1H104K 0.1 50V C7227 ECA1HAK010XI 1 50V C5323 ECJ1VB1H104K 0.1 50V C7228 ECA1HAK010XI 1 50V...

This manual is also suitable for:

Sa-ak250ebSa-ak250egSa-ak250ee

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