Panasonic SA-AK750E Service Manual
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Panasonic SA-AK750E 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
n AMPLIFIER SECTION
RMS output power
THD 10%, both channels driven
1 kHz
(Low channel)
10 kHz
(High channel)
60 Hz
(Subwoofer channel)
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)
110 W per channel (3 Ω)
110 W per channel (3 Ω)
220 W per channel (6 Ω)
660 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 steps)
560 µV/m
SA-AK750E
SA-AK750EB
SA-AK750EG
Colour
(K)... Black Type
Music Port input jack
Terminal
Sensitivity
Phone jack
Terminal
n CASSETTE DECK SECTION
Track system
Heads
Record/playback
Erasure
Motor
Recording system
Erasing 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)
© 2007 Matsushita Electric Industrial Co. Ltd.. All
rights
reserved.
distribution is a violation of law.
ORDER NO. MD0703026CE
CD Stereo System
Stereo, 3.5 mm jack
100 mV, 4.7 kΩ
Stereo, 3.5 mm jack
4 track, 2 channel
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
Unauthorized
copying
4.8 cm/s
and

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Summary of Contents for Panasonic SA-AK750E

  • Page 1 ORDER NO. MD0703026CE CD Stereo System SA-AK750E SA-AK750EB SA-AK750EG Colour (K)... Black 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 n AMPLIFIER SECTION Music Port input jack...

  • Page 2: Table Of Contents

    SA-AK750E / SA-AK750EB / SA-AK750EG (3) MP3* S/N Ratio *MPEG-1 Layer 3, MPEG-2 Layer 3 USB unit out 85 dB Bit rate n GENERAL 32 kbps to 320 kbps Power supply Sampling frequency For E/EG only AC 230 V, 50Hz 32 kHz, 44.1 kHz, 48 kHz...
  • Page 3 SA-AK750E / SA-AK750EB / SA-AK750EG 10.1. Caution 15.6. Deck P.C.B. 10.2. Disassembly flow chart 15.7. Waveform Chart 10.3. Main Parts Location 16 Wiring Connection Diagram 10.4. Disassembly of Top Cabinet 17 Block Diagram 10.5. Disassembly of CD Changer Unit (CRS1) 17.1.

  • Page 4: Safety Precautions

    SA-AK750E / SA-AK750EB / SA-AK750EG 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. 2. After servicing, ensure that all the protective devices such as insulation barriers and insulation papers shields are properly installed.

  • Page 5: Caution For Ac Mains Lead

    SA-AK750E / SA-AK750EB / SA-AK750EG 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-AK750E / SA-AK750EB / SA-AK750EG 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 230 V, 50 Hz in NO SIGNAL mode (volume min at CD mode) should be ~ 350mA.

  • Page 7: Prevention Of Electro Static Discharge (Esd) To Electrostatically Sensitive (Es) Devices

    SA-AK750E / SA-AK750EB / SA-AK750EG 2 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”...

  • Page 8: Handling Precautions For Traverse Deck

    SA-AK750E / SA-AK750EB / SA-AK750EG 3 Handling Precautions For Traverse Deck The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by the static electricity of clothes or our human body. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
  • Page 9 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 10: Precaution Of Laser Diode

    SA-AK750E / SA-AK750EB / SA-AK750EG 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: Warning

    SA-AK750E / SA-AK750EB / SA-AK750EG 5 Warning 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-AK750E / SA-AK750EB / SA-AK750EG 6 Accessories Remote Control FM Antenna Wire AC Cord (For E/EG only) AC Cord (For EB only) AM Loop Antenna...

  • Page 13: Operating Procedures

    SA-AK750E / SA-AK750EB / SA-AK750EG 7 Operating Procedures 7.1. Main Unit Key Buttons Operations 7.2. Remote Control Key Buttons Operations...
  • Page 14 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 15: New Features

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 16: Connecting And Playing A Usb Mass Storage Class Device

    SA-AK750E / SA-AK750EB / SA-AK750EG 8.2. Connecting and Playing a USB Mass Storage Class Device With reference to page 16 of the operating instruction manual.

  • Page 17: Self Diagnosis And Special Mode Setting

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 18 SA-AK750E / SA-AK750EB / SA-AK750EG Item FL Display Key Operation Mode Name Description Front Key Doctor Mode To enter into Doctor (Display 1) In any mode: Mode for checking of 1. Press [ ] button on main unit various items and follow by [4] and [7] on remote control.
  • Page 19 SA-AK750E / SA-AK750EB / SA-AK750EG Item FL Display Key Operation Mode Name Description Front Key Tape Eject Test To check on the tape In doctor mode: eject function (For deck 1. Press [0] button on remote control. 1/2) FL Display Test To...

  • Page 20: Reliability Test Mode (Crs1 Mechanism)

    SA-AK750E / SA-AK750EB / SA-AK750EG Note: Microprocessor firmware refers to version number for microprocessor IC located on PANEL P.C.B.. It is subject to change which would be updated accordingly. ROM correction checksum refers to the HEX code that is displayed upon key buttons pressed if an EEPROM is loaded in the unit.

  • Page 21: Error Code Table Display

    SA-AK750E / SA-AK750EB / SA-AK750EG 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...
  • Page 22 SA-AK750E / SA-AK750EB / SA-AK750EG The error code is automatically display after entering into self-diagnostic mode. 9.4.1. Error Code Table for Deck Mechanism Error Code Diagnosis Contents Description of error Automatic FL Display Remarks Mode SW, plunger Normal operation during For deck mechanism unit.
  • Page 23 SA-AK750E / SA-AK750EB / SA-AK750EG Error Code Diagnosis Contents Description of error Automatic FL Display Remarks HOME Cam gear/gear Cam gear does not move to For CD changer unit (CRS1). assembly abnormal “HOME” position under Press [SINGLE CHANGE] on main unit following conditions for next error.
  • Page 24 SA-AK750E / SA-AK750EB / SA-AK750EG · Only the first 5 errors will be memorized (in backup memory). The subsequence error shall be ignored and not memorize. For system with EEPROM as memory backup,memory space in EEPROM is neccesary. 2. To display all error code memorized In CRS1 Self-Diagnostic mode, press [SINGLE CHANGE] to display subsequence error code.

  • Page 25: Assembling And Disassembling

    SA-AK750E / SA-AK750EB / SA-AK750EG 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-AK750E / SA-AK750EB / SA-AK750EG 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-AK750E / SA-AK750EB / SA-AK750EG 10.3. Main Parts Location...

  • Page 28: Disassembly Of Top Cabinet

    SA-AK750E / SA-AK750EB / SA-AK750EG 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. Step 4 Push the top cabinet backwards to release catches.

  • Page 29: Disassembly Of Rear Panel

    SA-AK750E / SA-AK750EB / SA-AK750EG Step 4 Lift the CD changer unit upwards to remove it. · Disassembly of Mecha Chassis Step 5 Remove 2 screws. Step 6 Remove the Mecha Chassis. Note: For disassembly & assembly of traverse unit, please refer to section 10.16 of this service manual.Please refer to original...
  • Page 30 SA-AK750E / SA-AK750EB / SA-AK750EG Step 2 Detach cable CN2810 at Main P.C.B.. Step 3 Detach FFC cables (CN2801 & CN2805) at Main P.C.B.. Step 4 Remove rear panel.

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

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 (CN2803, CN2806 &...

  • Page 32: Disassembly Of Power P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 33: Disassembly Of Front Panel Unit

    SA-AK750E / SA-AK750EB / SA-AK750EG Step 3 Remove up the heat sink sub assembly (with IC5501). Step 4 Remove screw and IC clip. Step 5 Remove IC5501 from the sub assembly. Caution: During assembly of the heat sink sub assembly (with IC5501) all soldering points is touch-up to avoid dry- joints.

  • Page 34: Disassembly For Panel P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 35: Disassembly Of Tact Switch P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 36: Disassembly Of Deck Mechanism Unit

    SA-AK750E / SA-AK750EB / SA-AK750EG Step 4 Unsolder 4 points. Step 5 Remove USB P.C.B.. 10.14. Disassembly of Deck mechanism unit · Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 ·...

  • Page 37: Disassembly Of Traverse Unit

    SA-AK750E / SA-AK750EB / SA-AK750EG Step 3 Remove Deck P.C.B. Step 2 Desolder wire at deck motor terminals. 10.16. Disassembly of Traverse Unit · Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 Important notes: Ensure all the trays are in the “STOCK”...

  • Page 38: Disassembly For Deck Mechanism

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 39 SA-AK750E / SA-AK750EB / SA-AK750EG 10.17.1. Replacement of Pinch Roller and Head Block...
  • Page 40 SA-AK750E / SA-AK750EB / SA-AK750EG 10.17.2. Replacement of Motor, Capstan Belt A, Capstan Belt B, and Winding Belt...

  • Page 41: Disassembly Of Deck Mechanism P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 10.18. 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 42: Disassembly Of Cassette Lid

    SA-AK750E / SA-AK750EB / SA-AK750EG 10.19. 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 43 SA-AK750E / SA-AK750EB / SA-AK750EG Step 2 Push the lever upward and open the cassette lid. Remove the cassette tape. Note: Follow 10.19 Disassembly for cassette lid (Step1) to (Step 3). Remove the cassette tape.

  • Page 44: Service Fixture And Tools

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 45: Checking And Repairing Of Transformer P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 12.2. Checking and Repairing of Transformer P.C.B. 12.3. Checking and Repairing of Panel, Deck & Deck Mechanism P.C.B.

  • Page 46: Checking And Repairing Of Power P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 12.4. Checking and Repairing of Power P.C.B.

  • Page 47: Procedure For Checking Operation Of Individual Parts Of Deck Mechanism Unit

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 48 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 49: Measurement And Adjustments

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 50 SA-AK750E / SA-AK750EB / SA-AK750EG 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 51: Voltage And Waveform Chart

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 52: Power P.c.b. & Transformer P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 15.3. Power P.C.B. & Transformer P.C.B. 15.4. Panel P.C.B.

  • Page 53: Main P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 15.5. Main P.C.B.

  • Page 54: Deck P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 15.6. Deck P.C.B. 15.7. Waveform Chart...

  • Page 55: Wiring Connection Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 16 Wiring Connection Diagram 9 ..1 CN3601 H5104 CN2810 TUNER MOTOR PACK CN2809 POWER P.C.B. SOLDER SIDE CN2801 MAIN P.C.B. SOLDER SIDE RIGHT SPEAKERS TO CRS1 JK5101 CN3200 (CN1) LEFT SPEAKERS...
  • Page 56 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 57: Block Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 PHOTO DETECTOR...

  • Page 58: Deck/ Deck Mechanism Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 17.2. Deck/ Deck Mechanism Diagram IC1001 AN7326K DECK R/P IC (DECK 1) .B. HEAD Q1101 MUTE SWITCH (DECK 2) Q1304 Q1302 HEAD MUTE MUTE SWITCH SWITCH TO MAIN DRIVER (1/2) L1301 Q1309,Q1310 Q1304 Q1303 (DECK 2)

  • Page 59: Main Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 Q2811 Q2411 Q2142 Q2317 Q2417 TO TUNER PACK MUTE MUTE AGC CONTROL MUTE MUTE IN-R2 SWITCH SWITCH...
  • Page 60 SA-AK750E / SA-AK750EB / SA-AK750EG FROM USB FROM CD SERVO 5.3V 3.3V 3.3V FROM POWER IC2871 E-EPROM IC X2802 X2801 (NOT SUPPLIED) IC2801 C2CBYY000424 MICROPROCESSOR SW LVL1 SW_LVL1 SW LVL1 SW LVL2 SW_LVL2 SW LVL2 MUTEA MUTE_A IDCDET ASPDA ASPCLK LM.1...

  • Page 61: Panel Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 17.4. Panel Diagram FL6602 A2BD00000171 FL DISPLAY 5-11 25-40 TO TRANSFORMER 31-41 14-29 IC6601 C0HBB0000057 FL DRIVER TO MAIN (2/2) Z6481 REMOTE SENSOR JK6751 TO MAIN M.PORT (1/2) S6201-S6207 TO MAIN (2/2) JK6551 HEADPHONE TO MAIN...

  • Page 62: Power Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 17.5. Power Diagram JK5101 IC5301 SPEAKER C1AA00000755 2CH DIGITAL AMP L5301 OUT1 10 RCH.H IN1+ SPEAKER RCH.HIGH OUT2 14 TO MAIN IN1- RCH.L (1/2) IN2+ SPEAKER RCH.LOW IN2- Q5153 MODE 1 OSC SWITCH VDDA1 20...

  • Page 63: Usb/ Transformer Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 17.6. USB/ Transformer Diagram T5950 IC951 IC900 D5950-D5953 C0DBZYE00002 MNZSFB5KJM1 VOLTAGE REGULATOR USB CONTROLLER IC 6,7,8 VDD 2 MMOD1 15 OSC0 NRST 14 TO POWER X900 FP5950 CD_RST 8 OSC1 D5954-D5957 CD_MLD 64 P903 USB CONNECTOR...
  • Page 64 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 65: Notes Of Schematic Diagram

    SA-AK750E / SA-AK750EB / SA-AK750EG 18 Notes Of Schematic Diagram (All schematic diagrams may be modified at any time with : Tape Record signal line the development of new technology) : Tape Playback signal line Notes: S971: Mode switch. : Main signal line S972: Half switch.
  • Page 66 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 67: A) Cd Servo Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 68: B) Main Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 : TAPE RECORD SIGNAL LINE...
  • Page 69 SA-AK750E / SA-AK750EB / SA-AK750EG SCHEMATIC DIAGRAM - 3 MAIN CIRCUIT : +B SIGNAL LINE : TAPE RECORD SIGNAL LINE : MAIN SIGNAL LINE R2335 R2331 R2334 W587 C2333 C2331 Q2317,Q2417 6800P R2333 B1ABCF000176 MUTING SWITCH CN2809 F_HOP R2316 2.2k...
  • Page 70 SA-AK750E / SA-AK750EB / SA-AK750EG SCHEMATIC DIAGRAM - 4 MAIN CIRCUIT : +B SIGNAL LINE : CD SIGNAL LINE : FM/AM SIGNAL LINE : MAIN SIGNAL LINE : AUX SIGNAL LINE : USB SIGNAL LINE W658 D2811 B0ADCJ000020 R2894 R2121 3.3k...
  • Page 71 SA-AK750E / SA-AK750EB / SA-AK750EG SCHEMATIC DIAGRAM - 5 MAIN CIRCUIT : AUX SIGNAL LINE : USB SIGNAL LINE : +B SIGNAL LINE : MAIN SIGNAL LINE TO MAIN SECTION (2/4) IDCDET 0.1u C2940 Q2942 R2940 B1ACKD000006 820k FAN MOTOR ON/OFF SWITCH...

  • Page 72: C) Panel Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 R6631 W924 D6301 B0ACCK000005 GND2 SYS6V R6632...

  • Page 73: D) Sub Panel Circuit & (G) Deck Mechanism Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 R6457 K6101 D6461...

  • Page 74: E) Power Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 19.5. (E) Power Circuit SCHEMATIC DIAGRAM - 8 POWER CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE : MAIN SIGNAL LINE Q5154 2SB0709AHL Q5173 W1102 R5154 PCONT SWITCH B1ABCF000176 R5153 SWITCH R5148 IC5301 IC5401...
  • Page 75 SA-AK750E / SA-AK750EB / SA-AK750EG SCHEMATIC DIAGRAM - 9 POWER CIRCUIT : MAIN SIGNAL LINE : +B SIGNAL LINE : -B SIGNAL LINE SUBWOOFER- SUBWOOFER+ C5335 0.015 SUBWOOFER- SUBWOOFER SUBWOOFER+ C5343 JK5102 0.015 L5604 C5334 0.015 G0B9R5K00001 LEFT LOW +...

  • Page 76: F) Deck Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 ERASE Q1101,Q1201...

  • Page 77: H) Transformer Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 19.7. (H) Transformer Circuit SCHEMATIC DIAGRAM - 11 TRANSFORMER CIRCUIT :+B SIGNAL LINE FP5940 C5940 63V1000u C5960 0.1u +VCC1 C5920 63V1000u +VCC1 FP5920 -VCC1 T5950 POWER CIRCUIT -VCC1 G4CYAYY00143 (H5104) IN MAIN TRANSFORMER SCHEMATIC DIAGRAM-9...

  • Page 78: I) Usb Circuit

    SA-AK750E / SA-AK750EB / SA-AK750EG 19.8. (I) USB Circuit SCHEMATIC DIAGRAM - 12 USB CIRCUIT : + B SIGNAL LINE : USB SIGNAL LINE IC951 C0DBZYE00002 VOLTAGE REGULATOR R972 C931 16V10 R971 D3.3V R951 C914 R950 CTRL FLAG C951 DGND R957 2.2K...

  • Page 79: Printed Circuit Board

    SA-AK750E / SA-AK750EB / SA-AK750EG 20 Printed Circuit Board Note: Circuit board diagrams may be modified at any time with the development of new technology.
  • Page 80 SA-AK750E / SA-AK750EB / SA-AK750EG 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 TP19 W7014 Q1309 CN1305 Q1310 TP14 C7204 W7015 W1909 W1935 C7226...

  • Page 81: B) Main P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 20.2. (B) Main P.C.B. MAIN P.C.B (REPV0130D) Q2554 W571 L2962 R2556 R2447 C2705 R2702 C2969 R2941 R2565 R2561 R2721 R2446 C2941 C2312 L2961 R2564 C2552 Q2441 R2722 R2560 R2145 R2705 R2703 W277 R2944 R2557 C2722...

  • Page 82: C) Panel P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 20.3. (C) Panel P.C.B. PANEL P.C.B (REPV0131C) S6103 S6201 (CD1) (OPEN/CLOSE) R6481 R6202 R6105 S6202 S6102 (CD2) (MULTI CHANGE) W807 W808 W809 S6203 R6102 (CD3) L6553 L6551 W909 S6104 (SINGLE CHANGE) (CD4) S6204 W840 L6552...

  • Page 83: D) Sub Panel P.c.b. & (I) Usb P.c.b. (Side A & B)

    SA-AK750E / SA-AK750EB / SA-AK750EG 20.4. (D) Sub Panel P.C.B. & (I) USB P.C.B. (Side A & B) SUB PANEL P.C.B (REPV0131C) USB P.C.B (REPV0101A) JW6001 D6462 (VOL. LED) S6304 S6305 R6302 R6303 (TUNER) (MUSIC PORT) D6461 R6457 VR6491 R6304...

  • Page 84: E) Power P.c.b. 20.6. (H) Transformer P.c.b

    SA-AK750E / SA-AK750EB / SA-AK750EG 20.5. (E) Power P.C.B. POWER P.C.B (REPV0133G) H5104 C5114 Q5201 Q5202 C5115 C5103 IC5201 C5210 W1003 W1005 C5208 W1092 X5201 W1099 R5204 R5514 C5172 C5701 R5206 R5205 W1094 W1095 W1093 C5102 W1007 C5205 R5103 R5209...
  • Page 85 SA-AK750E / SA-AK750EB / SA-AK750EG 20.6. (H) Transformer P.C.B. TRANSFORMER P.C.B (REPV0132C) T5951 250V T2.5AL (SUB TRANSFORMER) L5950 C5953 Q5950 J5955 R5952 D5972 Z5950 C5951 D5986 C5952 D5952 RL5950 C5954 JK5950 Q5952 W5914 Q5953 W5915 CN5951 R5958 AC IN ~...
  • Page 86 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 87: Illustration Of Ics, Transistors And Diodes

    SA-AK750E / SA-AK750EB / SA-AK750EG 21 Illustration of ICs, Transistors and Diodes C0AABB000125 C0ABBB000244 (8P) C0CBAHG00011 C1AA00000612 C0DBZYE00002 (8P) C1BB00001121 (100P) MN6627954MA (100P) C2CBYY000423 (100P) C0HBB0000057 (44P) MNZSFB5KJM1 (64P) C0JBAB000011(14P) C0DAZYY00005 AN7326K (26P) C0DBZGC00067 BA5948FPE2 C0GAG0000007 C1AA00000755 (24P) C1BB00001137 (16P)

  • Page 88: Terminal Function Of Ic's

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 IREF Reference I/P DRAM address signal O/P 9...

  • Page 89: Ic7002 (Ba5948Fpe2) Ic 4Ch Drive

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 90 SA-AK750E / SA-AK750EB / SA-AK750EG Pin No. Mark Function /Reset_SW CD Limit Switch Input for the most Inner Point (Active Low) HOME_SW Home Switch for CRS1 CD_RST CD Reset output CLOSE_SW CLOSE switch for CRS1 OPEN_SW Open switch for CRS1...

  • Page 91: Exploded Views

    SA-AK750E / SA-AK750EB / SA-AK750EG 23 Exploded Views 23.1. Cabinet Parts Location...
  • Page 92 SA-AK750E / SA-AK750EB / SA-AK750EG...

  • Page 93: Deck Mechanism Parts Location (Raa4403-S)

    SA-AK750E / SA-AK750EB / SA-AK750EG 23.2. Deck Mechanism Parts Location (RAA4403-S)

  • Page 94: Packaging

    SA-AK750E / SA-AK750EB / SA-AK750EG 23.3. Packaging...

  • Page 95: Replacement Parts List

    SA-AK750E / SA-AK750EB / SA-AK750EG 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 96 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks RMC0061 PACK SPRING Q1314 B1GDCFGH0002 TRANSISTOR RXF0061-1 FLYWHEEL F ASS’Y Q1315 B1ACKD000006 TRANSISTOR RXG0040 FF RELAY GEAR ASS’Y...
  • Page 97 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks D5102 B0BA02600018 DIODE S6204 EVQ21405RJ SW CD4 D5103 B0BA5R000004 DIODE S6205 EVQ21405RJ SW CD5 D5104 B0BA01100004 DIODE...
  • Page 98 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks LB843 J0JAC0000021 CHIP INDUCTOR LB845 J0JAC0000021 CHIP INDUCTOR E5101 K9ZZ00001279 EARTH PLATE LB846 J0JAC0000021 CHIP INDUCTOR E5103...
  • Page 99 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks W645 ERJ6GEY0R00V CHIP JUMPER W7005 D0GBR00JA008 CHIP JUMPER W646 ERJ6GEY0R00V CHIP JUMPER W7006 ERJ8GEY0R00V CHIP JUMPER W647...
  • Page 100 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R1064 ERJ3GEY0R00V 0 1/16W R2204 D0GB273JA007 27K 1/16W R1101 D0GB330JA008 33 1/16W R2211 D0GB222JA041 2.2K 1/16W R1102 D0GB152JA008 1.5K 1/16W...
  • Page 101 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R2446 D0GB332JA007 3.3K 1/16W R2836 D0GB101JA007 100 1/16W R2447 D0GB1R0JA007 1 1/16W R2837 D0GB101JA007 100 1/16W R2452...
  • Page 102 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R5114 ERJ3GEYJ1R8V 1.8 1/16W R5523 ERJ6GEYJ105V 1M 1/10W R5123 D0C14R7JA020 R5524 ERJ6GEYJ105V 1M 1/10W R5126 D0GB102JA008 1K 1/16W...
  • Page 103 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R7330 ERJ3GEYJ562V 5.6K 1/16W C1315 F1H1H222A013 2200P 50V R7331 D0GB223JA008 22K 1/16W C1316 F1H1H102A219 1000P 50V R7332...
  • Page 104 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C2431 ECJ1VB1H682K 6800P 50V C4000 F1H1H104A783 0.1 50V C2433 F1H1A105A025 1 10V C4001 F1H1H223A219 0.022 50V C2441...
  • Page 105 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C5335 F1H1H153A219 0.015 50V C5539 F1H1H102A219 1000P 50V C5336 F1H1H102A219 1000P 50V C5701 F2A0J101A181 100 6.3V C5337...
  • Page 106 SA-AK750E / SA-AK750EB / SA-AK750EG Ref. No. Part No. Part Name & Description Remarks C7614 F2A0J101A198 100 6.3V C7626 ECJ1VB1C104K 0.1 16V C7670 ECJ1VB1C104K 0.1 16V YSP0703...

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