Panasonic SA-AK370PL Service Manual
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Panasonic SA-AK370PL Service Manual

Panasonic SA-AK370PL 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
AMPLIFIER SECTION
RMS output power stereo mode
THD 10%, both channels driven
1 kHz
Total RMS stereo mode power
PMPO output power
FM/AM TUNER, TERMINALS SECTION
Preset station
Frequency Modulation (FM)
Frequency range
87.9 to 107.9 MHz (200 kHz step) (PL Only)
87.5 to 108.0 MHz (100 kHz step) (PL Only)
87.50 to 108.00 MHz (50 kHz step) (GCP Only)
Antenna terminal(s)
Amplitude Modulation (AM)
Frequency range
520 to 1710 kHz (10 kHz step) (PL Only)
522 to 1629 kHz (9 kHz step) (GCP Only)
522 to 1639 kHz (10 kHz step) (GCP Only)
Aux Input
Music Port (front) jack
SA-AK370PL
SA-AK370GCP
Colour
(K)... Black Type
Sensitivity
Terminal
Headphone jack
250 W per channel (6 Ω)
Terminal
500 W
Output impedance
5500 W
Mic jack
Sensitivity
FM 25 stations
Terminal
AM 15 stations
Type
Track system
Heads
Record/playback
Erasure
75 Ω (unbalanced)
Motor
Recording system
Erase system
Tape speed
Overall frequency response (+3, -6 dB) at DECK OUT
NORMAL
RCA pin jack
S/N Ratio
Wow and flutter
CD Stereo System
CASSETTE DECK SECTION
© 2008 Matsushita Electric Industrial Co. Ltd.. All
rights
reserved.
distribution is a violation of law.
ORDER NO. MD0807004CE
100 mV, 4.0 kΩ
Stereo, 3.5 mm jack
Stereo, 3.5 mm jack
32 Ω (Max)
0.7 mV, 1.2 kΩ
Mono, 3.5 mm jack (1 system)
1 way
4 track, 2 channel
Solid permalloy head
Double gap ferrite head
DC servo motor
AC bias 100 kHz
AC erase 100 kHz
4.8 cm/s
35 Hz to 14 kHz
50 dB (A weighted)
0.18% (WRMS)
Unauthorized
copying
and

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  • Page 1 ORDER NO. MD0807004CE CD Stereo System SA-AK370PL SA-AK370GCP 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 AMPLIFIER SECTION Sensitivity 100 mV, 4.0 kΩ...

  • Page 2: Table Of Contents

    SA-AK370PL / SA-AK370GCP Fast forward and rewind time Power supply Approx. 120 seconds with C-60 cassette tape AC 120 V, 60Hz (PL Only) DISC SECTION AC 110 to 127/220 to 240 V, 50/60Hz (GCP Only) Disc played [8 cm or 12 cm]...

  • Page 3: Safety Precautions

    SA-AK370PL / SA-AK370GCP 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 4: Protection Circuitry

    SA-AK370PL / SA-AK370GCP 1.4. 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.
  • Page 5 SA-AK370PL / SA-AK370GCP Reference No. Part No. Part name & Description Remarks P5701 K2AB2B000010 AC INLET [M] PL C5700 F1BAF1020020 1000pF C5701 F0CAF334A087 0.33uF C5703 F0C2H1040001 0.1uF 500V [M] GCP C5703 F0CAF224A085 0.22uF [M] PL C5704 F1BAF1020020 1000pF C5705 F1BAF1020020...

  • Page 6: Prevention Of Electrostatic Discharge (Esd) To Electrostatically Sensitive (Es) Devices

    SA-AK370PL / SA-AK370GCP 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 7: Handling Precautions For Traverse Unit

    SA-AK370PL / SA-AK370GCP 3 Handling Precautions For Traverse Unit 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 8 SA-AK370PL / SA-AK370GCP...

  • Page 9: Precaution Of Laser Diode

    SA-AK370PL / SA-AK370GCP 4 Precaution of Laser Diode CAUTION : This product utilizes a laser diode with the unit turned "on", invisible laser radiation is emitted from the pickup lens. Wavelength: 780 nm Maximum output radiation power from pickup: 100 µW/VDE Laser radiation from the pickup unit is safety level, but be sure the followings: 1.

  • Page 10: About Lead Free Solder (Pbf)

    SA-AK370PL / SA-AK370GCP 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 11: Operation Procedures

    SA-AK370PL / SA-AK370GCP 6 Operation Procedures 6.1. Main Unit Key Buttons Operations...

  • Page 12: Remote Control Key Buttons Operations

    SA-AK370PL / SA-AK370GCP 6.2. Remote Control Key Buttons Operations...
  • Page 13 SA-AK370PL / SA-AK370GCP...

  • Page 14: Using The Music Port

    SA-AK370PL / SA-AK370GCP 6.3. Using the Music Port This feature enables you to enjoy music from a portable audio equipment.
  • Page 15 SA-AK370PL / SA-AK370GCP 6.4. Connecting and Playing a USB Mass Storage Class Device...

  • Page 16: Self Diagnosis And Special Mode Setting

    SA-AK370PL / SA-AK370GCP 7 Self diagnosis and special mode setting This unit is equipped with functions for checking and inspecting namely: Self-Diagnostic and Test Mode. 7.1. 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 17: Service Mode Table

    SA-AK370PL / SA-AK370GCP 7.2. Service Mode Table 1...
  • Page 18 SA-AK370PL / SA-AK370GCP 7.3. Service Mode Table 2...

  • Page 19: Reliability Test Mode (Crs1 Mechanism)

    SA-AK370PL / SA-AK370GCP 7.4. Reliability Test Mode (CRS1 Mechanism) Below is the process flow chart of ageing for the Mechanism unit (CRS1).

  • Page 20: Error Code Table Display

    SA-AK370PL / SA-AK370GCP 7.5. Error code Table Display Self-Diagnosis Function (refer Section “7.2 Service Mode Table 1”) 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...
  • Page 21 SA-AK370PL / SA-AK370GCP The error code is automatically display after entering into self-diagnostic mode. 7.5.1. Error Code Table (For Deck Mechanism)
  • Page 22 SA-AK370PL / SA-AK370GCP 7.5.2. Error Code Table (For CD Mechanism)
  • Page 23 SA-AK370PL / SA-AK370GCP 7.5.3. Error Code Table (For Power Supply) 7.5.4. 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 24 SA-AK370PL / SA-AK370GCP 3. To clear the error code memory In CRS1 Self-Diagnostic mode, long press [DISC EXCHANGE] key (2s or more) 4. To exit CRS1 Self Diagnostic mode, turn off the set.

  • Page 25: Assembling And Disassembling

    SA-AK370PL / SA-AK370GCP 8 Assembling and Disassembling 8.1. Caution Special Note: This model uses a new Mechanism unit (CRS1). In this following section does not contain the necessary disassembly & assembly information for the Mechanism unit (CRS1) except the disassembly & assembly of traverse unit. Kindly refer to the original service manual for the Mechanism unit.
  • Page 26 SA-AK370PL / SA-AK370GCP • Replacement for Regulator Diode (D5803) • Disassembly of AC Inlet P.C.B. • Disassembly of Voltage Selector P.C.B. (For GCP Only) Below shown is part no. of different screws types used:...

  • Page 27: Disassembly Flow Chart

    SA-AK370PL / SA-AK370GCP 8.2. 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 28: Main Components And P.c.b. Location

    SA-AK370PL / SA-AK370GCP 8.3. Main Components and P.C.B. Location...

  • Page 29: Disassembly Of Top Cabinet

    SA-AK370PL / SA-AK370GCP 8.4. Disassembly of Top Cabinet Step 1 Remove 3 screws on both sides of Top Cabinet. Step 5 Lift up the Top Cabinet and remove it in the direction of arrow. Step 2 Remove 5 screws at the rear panel.
  • Page 30 SA-AK370PL / SA-AK370GCP Step 2 Detach 22P FFC cable at connector (CN2801) at Main P.C.B.. Step 3 Detach 14P FFC cable at connector (CN2805) at Main P.C.B.. Special Note: During reassembling procedure, ensure both the claws and catches are fully catched.

  • Page 31: Disassembly Of Fan Unit

    SA-AK370PL / SA-AK370GCP Note: Step 8 Lift up the Mechanism Unit (CRS1). For disassembly & assembly of traverse unit, please refer to original Service Manual for the Disassembly and Assembly of the Mechanism Unit (CRS1). 8.6. Disassembly of Fan Unit •...

  • Page 32: Disassembly Of Rear Panel

    SA-AK370PL / SA-AK370GCP Step 3 Remove 1 screw at the rear panel. Note: During reassembling procedures, ensure cables are properly dressed in the hook. Step 4 Lift the Fan Unit slightly as arrow shown. Step 5 Remove the Fan Unit.

  • Page 33: Disassembly Of Front Panel Unit

    SA-AK370PL / SA-AK370GCP Step 4 Release 2 catch from the side panel. Step 5 Remove the rear panel. • Disassembly of Rear Panel Step 2 Remove 8 screws at rear panel (For PL only). Step 2 Remove 9 screws at rear panel (For GCP only).

  • Page 34: Follow The (Step 1) - (Step 6) Of Item

    SA-AK370PL / SA-AK370GCP Step 2 Remove 9 screws at Panel P.C.B.. Step 6 Detach the front panel unit. Step 3 Remove 2 screws at Tact Switch P.C.B.. 8.9. Disassembly of Panel P.C.B., Tact Switch P.C.B. & Remote Sensor P.C.B. • Follow the (Step 1) - (Step 5) of Item 8.4 •...
  • Page 35 SA-AK370PL / SA-AK370GCP Step 6 Release 2 catches at Remote Sensor P.C.B.. Step 7 Lift up the Panel P.C.B., Tact Switch P.C.B. & Remote Sensor P.C.B. altogether as arrow shown. Step 5 Release 6 catches at Tact Switch P.C.B.. Step 8 Desolder cable (ZJ6601) on Panel P.C.B..

  • Page 36: Disassembly Of Mic P.c.b

    SA-AK370PL / SA-AK370GCP Step 2 Remove 2 screws at Mic P.C.B.. Caution: 1. During assembling of the P.C.B.s, ensure that the diode shown on Tact Switch P.C.B. are in upright position. Step 3 Release 1 catch at Mic P.C.B.. 2. During reassembling procedures, ensure that D-Bass knob is seated properly.

  • Page 37: Disassembly Of Music Port

    SA-AK370PL / SA-AK370GCP 8.11. Disassembly of USB P.C.B. • Follow the (Step 1) - (Step 5) of Item 8.4 • Follow the (Step 4) - (Step 7) of Item 8.5 • Follow the (Step 1) - (Step 6) of Item 8.8 Step 1 Remove 2 screws at USB unit.

  • Page 38: Disassembly Of Cd Lid

    SA-AK370PL / SA-AK370GCP Step 2 Release 2 catches. Step 3 Lift up the Music Port P.C.B.. Step 2 Remove CD Lid as arrow shown. Note: Please ensure that the spring is assembly at right position. 8.14. Disassembly of Deck Mechanism Unit •...

  • Page 39: Disassembly Of Deck P.c.b

    SA-AK370PL / SA-AK370GCP Step 2 Desolder 2P cable at the motor terminal. Step 3 Detach 9P cable at connector (CP1902) on Deck P.C.B.. Step 3 Remove the deck mechanism unit. Step 4 Detach connector CP1301 from the head connector. 8.15. Disassembly of Deck P.C.B.
  • Page 40 SA-AK370PL / SA-AK370GCP • Follow the (Step 1) - (Step 6) of Item 8.8 • Follow the (Step 1) - (Step 3) of Item 8.14 • Follow the (Step 1) - (Step 4) of Item 8.15 8.16.1. Replacement of Pinch Roller and Head Block Step 1 Release catch to remove the Pinch Roller (F) Assy.
  • Page 41 SA-AK370PL / SA-AK370GCP...

  • Page 42: Disassembly Of Deck Mechanism P.c.b

    SA-AK370PL / SA-AK370GCP 8.18. Disassembly of Cassette Lid • Follow the (Step 1) - (Step 5) of Item 8.4 8.17. Disassembly of Deck • Follow the (Step 4) - (Step 7) of Item 8.5 Mechanism P.C.B. • Follow the (Step 1) - (Step 6) of Item 8.8 •...

  • Page 43: Disassembly Of Traverse Unit

    SA-AK370PL / SA-AK370GCP Important notes: Ensure all the trays are in the “STOCK” position before proceeding to the disassemble of traverse unit. For procedures to set the trays in “STOCK” position, please refer to (5.3 Setting the Tray In “STOCK” position for CRS1 Service Manual order no.

  • Page 44: Disassembly Of D-Amp P.c.b

    SA-AK370PL / SA-AK370GCP Step 1: Turn over the unit and install the traverse unit. Step 2: Push the traverse slide plate as arrow shown to release the traverse unit. Caution: Do not exert strong force on the traverse slide plate.
  • Page 45 SA-AK370PL / SA-AK370GCP Step 2 Detach 8P cable at connector (CN5500) at D-Amp Step 4 Remove 4 screws at the rear panel. P.C.B.. Step 5 Lift up the D-Amp P.C.B. together with the chassis support as arrow shown. Step 3 Remove 2 screws at D-Amp P.C.B. chassis support .

  • Page 46: Replacement Of Audio Digital Power Amp Ic (Ic5400)

    SA-AK370PL / SA-AK370GCP 8.22. Replacement of Audio Digital Power Amp IC (IC5400) • Follow the (Step 1) - (Step 5) of Item 8.4 • Follow the (Step 1) - (Step 8) of Item 8.5 • Follow the (Step 1) - (Step 7) of Item 8.21 Step 1 Flip over D-Amp P.C.B..

  • Page 47: Replacement Of Audio Digital Power Amp Ic (Ic5000)

    SA-AK370PL / SA-AK370GCP Step 2 Screw back TR Spring onto the heat sink unit A. Make sure it is well tighten to prevent overheat. Note: Use a blower to remove the minute particles that might caused left on the TR Spring.

  • Page 48: Disassembly Of Main P.c.b

    SA-AK370PL / SA-AK370GCP Step 7 Detach 11P cable at connector (CN5802) at SMPS P.C.B.. 8.24. Disassembly of Main P.C.B. • Follow the (Step 1) - (Step 5) of Item 8.4 • Follow the (Step 1) - (Step 8) of Item 8.5 •...
  • Page 49 SA-AK370PL / SA-AK370GCP 8.25. Replacement of Voltage Regulator IC (IC2731) • Follow the (Step 1) - (Step 5) of Item 8.4 • Follow the (Step 1) - (Step 8) of Item 8.5 • Follow the (Step 1) - (Step 5) of Item 8.21 •...

  • Page 50: Disassembly Of Smps P.c.b

    SA-AK370PL / SA-AK370GCP 8.26. Replacement of Switch 8.27. Disassembly of SMPS P.C.B. Transistor (Q2751) • Follow the (Step 1) - (Step 5) of Item 8.4 • Follow the (Step 1) - (Step 8) of Item 8.5 • Follow the (Step 1) - (Step 5) of Item 8.4 •...

  • Page 51: Replacement Of Switch Regulator Ic (Ic5701)

    SA-AK370PL / SA-AK370GCP Step 4 Flip the SMPS P.C.B. and desolder red and black wires. Step 2 Remove 1 screw from the Switch Regulator IC (IC5701). • For GCP Only Step 3 Remove the Switch Regulator IC (IC5701) from the heat Step 5 Desolder white and blue wires.

  • Page 52: Replacement Of Switch Regulator Diode (D5702)

    SA-AK370PL / SA-AK370GCP Step 3 Solder pins of the Switch Regulator IC (IC5701) on the reverse side of SMPS P.C.B.. Step 3 Remove 1 screw from the Switch Regulator Diode (D5702). Step 4 Remove the heat sink Unit B in the direction of arrows.

  • Page 53: Replacement Of Regulator Diode (D5801)

    SA-AK370PL / SA-AK370GCP tightly screwed to the heat sink Unit B. Step 1 Desolder pins of the Regulator Diode (D5801) on the reverse side of SMPS P.C.B.. Step 3 Fix the heat sink Unit B on SMPS P.C.B. in the direction of arrows.

  • Page 54: Replacement Of Regulator Diode (D5802)

    SA-AK370PL / SA-AK370GCP Step 3 Remove the Regulator Diode (D5802) from the heat sink unit C. Caution: Handle the heat sink unit C with caution due to its high temperature after prolonged use. Touching it may lead to injuries. Step 3 Solder pins of the Regulator Diode (D5801) on the reverse side of SMPS P.C.B..

  • Page 55: Replacement Of Regulator Diode (D5803)

    SA-AK370PL / SA-AK370GCP Special Note: Ensure pins of the Regulator Diode (D5802) are properly seated and soldered on SMPS P.C.B.. 8.32. Replacement of Regulator Note: Refer to the diagrams of SMPS P.C.B. (Item 18.6.) for location of the part. Diode (D5803) •...

  • Page 56: Disassembly Of Ac Inlet P.c.b

    SA-AK370PL / SA-AK370GCP Special Note: Ensure pins of the Regulator Diode (D5803) are properly seated and soldered on SMPS P.C.B.. 8.33. Disassembly of AC Inlet P.C.B. • Follow the (Step 1) - (Step 5) of Item 8.4 Step 1 Remove 2 screws at AC Inlet P.C.B..
  • Page 57 SA-AK370PL / SA-AK370GCP Step 6 Flip over the AC Inlet P.C.B. and desolder red and black wires. Step 2 Push up the voltage selector from rear panel as arrow shown. Caution: Remember to use tie wraps to tie red/ black wires between AC Inlet P.C.B.
  • Page 58 SA-AK370PL / SA-AK370GCP Step 4 Release 2 catches on Voltage Selector P.C.B.. Step 5 Desolder white and blue wires.

  • Page 59: Service Fixture And Tools

    SA-AK370PL / SA-AK370GCP 9 Service Fixture and Tools Service Tools Extension FFC (A) Main P.C.B. (CN2341) - D-Amp P.C.B. (CN5050) REEX0930 (17P FFC Cable) (B) Main P.C.B. (CN2701) - SMPS P.C.B. (CN5802) REXX0680 (11P Wire) (C) SMPS P.C.B. (H5801) - D-Amp P.C.B. (CN5500)
  • Page 60 SA-AK370PL / SA-AK370GCP Step 9 Remove 4 screws at the Deck Mechanism unit. Step 12 Connect 27P FFC cable at connector (CN2806) at Main P.C.B.. Step 13 Connect 21P FFC cable at connector (CN3200) at Main P.C.B.. Step 14 Connect 22P FFC cable at connector (CN2011) at Main P.C.B..
  • Page 61 SA-AK370PL / SA-AK370GCP 10.3. Checking and Repairing Mic P.C.B. Step 1 Remove Top Cabinet. Step 2 Release the claws outwards on both sides. Step 3 Release the catches at both sides. 10.4. Checking and Repairing of D- Amp P.C.B. Step 1 Remove Top Cabinet.
  • Page 62 SA-AK370PL / SA-AK370GCP Step 8 Remove 3 screws from D-Amp P.C.B.. Step 6 Remove 4 screws at the rear panel. Step 7 Lift up the D-Amp P.C.B. together with the chassis support as arrow shown. Step 9 Lift up D-Amp P.C.B. as arrow shown.
  • Page 63 SA-AK370PL / SA-AK370GCP Step 2 Remove 4 screws. Step 12 Attach original cable with extension cable (REXX0683) (8P cable from H5801 to CN5500). Step 13 Connect extension cable (REEX0930) (17P cable from CN2341 to CN5050). Step 3 Remove 2 screws at AC Inlet P.C.B..
  • Page 64 SA-AK370PL / SA-AK370GCP Step 4 Cut 2 tie wraps. Step 7 Position SMPS P.C.B. & AC Inlet P.C.B. according to the diagram shown. Step 8 Connect 22P cable at the connector (CN2801) on Main P.C.B.. Step 9 Connect 14P cable at the connector (CN2805) on Main P.C.B..
  • Page 65 SA-AK370PL / SA-AK370GCP Step 13 Service AC Inlet P.C.B. & SMPS P.C.B. respectively.

  • Page 66: Procedure For Checking Operation Of Individual Parts Of Deck

    SA-AK370PL / SA-AK370GCP 11 Procedure for Checking Operation of Individual Parts of Deck Mechanism Unit 11.1. 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 67: Measurement And Adjustments

    SA-AK370PL / SA-AK370GCP 12 Measurement And Adjustments 12.1. Cassette Deck Section 12.1.1. Requirements • Test tape (QZZCFM) (QZZCWAT) • Normal blank cassette tape (QZZCRA) • Digital frequency counter • Oscilloscope • Electrical voltmeter • Headphone jack output jig (Fig 8) 12.1.2.

  • Page 68: Bias Voltage Check

    SA-AK370PL / SA-AK370GCP (Product reference value: 3,000±90Hz) 1. Connect a frequency indicator. (Fig 10) 2. Playback the middle portion of the test tape (QZZCWAT). 3. Adjust the motor screw so that the following output level is produced. (Fig 11) Adjustment Range: 3,000 ± 90Hz (a constant speed) Fig.

  • Page 69: Voltage Measurement And Waveform Chart

    SA-AK370PL / SA-AK370GCP 13 Voltage Measurement 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 70 SA-AK370PL / SA-AK370GCP 13.1.2. Main P.C.B.

  • Page 71: Deck P.c.b. & Deck Mechanism P.c.b

    SA-AK370PL / SA-AK370GCP 13.1.3. Deck P.C.B. & Deck Mechanism P.C.B. 13.1.4. SMPS P.C.B. 13.1.5. D-Amp P.C.B.
  • Page 72 SA-AK370PL / SA-AK370GCP 13.1.6. Panel P.C.B. 13.1.7. USB P.C.B. 13.1.8. Tact Switch P.C.B. & Mic P.C.B.

  • Page 73: Waveform Chart

    SA-AK370PL / SA-AK370GCP 13.2. Waveform Chart...
  • Page 74 SA-AK370PL / SA-AK370GCP...

  • Page 75: Wiring Connection Diagram

    SA-AK370PL / SA-AK370GCP 14 Wiring Connection Diagram...
  • Page 76 SA-AK370PL / SA-AK370GCP...

  • Page 77: Block Diagram

    SWITCH PROCESSOR/ CN7002 CN2801 TO MAIN DIGITAL FILTER (2/2) 3.3V 3.3V 3.3V 3.3V D/A CONVERTER MUTE PC1 4 CN7002 CN2801 [CH1] LCH OUT 3.3V TO MAIN (1/2) CN7002 CN2801 RCH OUT PC2 2 MUTE [CH2] SA-AK370PL/GCP CD SERVO BLOCK DIAGRAM...

  • Page 78: Main Diagram

    ON/OFF SWITCH TO FAN D2947 FAN_CTR Q2943 FAN SUPPLY FROM D-AMP CONTROL SWITCH IC2731 C0CAAKG00046 VOLTAGE REGULATOR FAN_INJ Q2949 Q2948 D2946 DC DETECT DC DETECT SWITCH SWITCH T2900 FROM PANEL FROM SMPS Q2900 TRANSFORMER SWITCH SA-AK370PL/GCP MAIN (1/2) BLOCK DIAGRAM...
  • Page 79 CTRL SWITCH SWITCH) Q2011 Q2012 SWITCH SWITCH IC2701 C0DAAYY00042 DC-DC CONVERTER Q2771 SWITCH VREF+ Q2711 Q2970 Q2772 CD3.3V SWITCH SWITCH SWITCH FROM SMPS FROM D-AMP TO TUNER PACK TO CRS1D FROM PANEL FROM SMPS FROM DECK SA-AK370PL/GCP MAIN (2/2) BLOCK DIAGRAM...
  • Page 80 TO PANEL SENSOR TO MAIN (2/2) REMOTE SENSOR P.C.B. S6208 S6820 EJECT STOP/-DEMO TACT SWITCH P.C.B. JK6810 MUSIC PORT TO MAIN (1/2) JK6800 HEADPHONE SA-AK370PL/GCP PANEL / REMOTE SENSOR / MUSIC PORT / HEADPHONE / TACT SWITCH / MICROPHONE BLOCK DIAGRAM...
  • Page 81 IN2+ VDDA2 20 IN2- 1 OSC VSSA1 6 23 MODE VSSA2 18 IC5500 C0JBAB000902 INVERTER GATE (CLOCK GENERATOR) TO MAIN (2/2) X5500 X5501 IC5501 C0JBAF000716 D-TYPE FLIP-FLOP FROM SMPS 4,6-11 Q5101,Q5102 TO MAIN DC DETECT (2/2) SA-AK370PL/GCP D-AMP BLOCK DIAGRAM...
  • Page 82 FOR GCP ONLY S5701 WHITE WIRE IC5899 VOLTAGE C0DAEMZ00001 BLUE WIRE SELECTOR SHUNT REGULATOR VOLTAGE SELECTOR P.C.B. PC5799 FEEDBACK IC5799 MIP4110MSSCF SWITCHING REGULATOR PC5702 Q5898 SYNC TO MAIN INVERTER SWITCH (2/2) SA-AK370PL/GCP SMPS / AC INLET / VOLTAGE SELECTOR CIRCUIT BLOCK DIAGRAM...
  • Page 83 : USB SIGNAL LINE : TAPE RECORD SIGNAL LINE : AUX/MIC/MUSIC PORT SIGNAL LINE ( ) Indicates the Pin No. of Right Channel. NOTE : Signal Lines are applicable to the Left Channel only. SA-AK370PL/GCP DECK/DECK MECHANISM/USB CIRCUIT BLOCK DIAGRAM...
  • Page 84 SA-AK370PL / SA-AK370GCP...

  • Page 85: Notes Of Schematic Diagram

    SA-AK370PL / SA-AK370GCP 16 Notes Of Schematic Diagram (All schematic diagrams may be modified at any time with Unit of inductance is H, unless otherwise noted. the development of new technology) Notes: • * S971: Mode switch FOR INDICATION ONLY.
  • Page 86 SA-AK370PL / SA-AK370GCP...

  • Page 87: Schematic Diagram

    12 11 R7220 R7330 W7002 W7004 5.6K C7335 X7201 C7315 IC7002 0.47 H2B169500005 BA5948FPE2 C7334 4 CH DRIVE IC C7338 10V220 0.056 R7331 R7323 3.3k R7315 R7325 3.3k R7332 R7335 M7301* M7302* TRAVERSE MOTOR SPINDLE MOTOR SA-AK370PL/GCP CD SERVO CIRCUIT...

  • Page 88: Main Circuit

    SA-AK370PL / SA-AK370GCP 17.2. (B) Main Circuit SCHEMATIC DIAGRAM - 2 MAIN CIRCUIT : + B SIGNAL LINE : - B SIGNAL LINE : AUX/MIC/MUSIC PORT SIGNAL LINE : CD SIGNAL LINE : FM/AM SIGNAL LINE : MAIN SIGNAL LINE...
  • Page 89 SA-AK370PL / SA-AK370GCP SCHEMATIC DIAGRAM - 3 MAIN CIRCUIT : MAIN SIGNAL LINE R2333 2.7k C2341 C2343 R2335 0.22 0.01 C2345 Q2335 R2337 R2345 R2343 6.8k CN2341 R2344 FRONTL R2346 6.8k Q2336 SIGNAL A_GND R2338 C2342 C2346 FRONT R 0.22...
  • Page 90 SA-AK370PL / SA-AK370GCP SCHEMATIC DIAGRAM - 4 MAIN CIRCUIT : + B SIGNAL LINE : - B SIGNAL LINE : AUX/MIC/MUSIC PORT SIGNAL LINE : CD SIGNAL LINE : USB SIGNAL LINE : TAPE RECORD SIGNAL LINE TO MAIN SECTION (4/4) R2041 2.7k...
  • Page 91 SA-AK370PL / SA-AK370GCP SCHEMATIC DIAGRAM - 5 MAIN CIRCUIT : + B SIGNAL LINE : - B SIGNAL LINE :AUX/MIC/MUSIC PORT SIGNAL LINE :MAIN SIGNAL LINE CN2806 FL_GND D2961 Q2942 FL_GND B1ACKD000006 Q2942 B0EAKM000117 SWITCH CD3.3V TO MAIN SECTION (2/4) CD3.3V...

  • Page 92: Panel Circuit

    SA-AK370PL / SA-AK370GCP 17.3. (C) Panel Circuit SCHEMATIC DIAGRAM - 6 PANEL CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE : MIC SIGNAL LINE MAIN CIRCUIT (CN2806) IN SCHEMATIC DIAGRAM - 5 CN6001 2221 2019 16 14 DGND FLGND...

  • Page 93: Music Port Circuit

    EXT_IN VOLUME JOG (CN2001) IN SCHEMATIC DIAGRAM - 4 REMOTE SENSOR CIRCUIT : +B SIGNAL LINE Z6601 B3RAD0000146 REMOTE SENSOR J6001B* PANEL CIRCUIT (J6001) IN DGND SCHEMATIC VREF+ DIAGRAM - 6 C6601 C6616 100p SA-AK370PL/GCP TACT SWITCH/MUSIC PORT/REMOTE SENSOR CIRCUIT...

  • Page 94: Deck Circuit

    SA-AK370PL / SA-AK370GCP 17.5. (G) Deck Circuit SCHEMATIC DIAGRAM - 8 DECK CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE : TAPE RECORD SIGNAL LINE : TAPE PLAYBACK SIGNAL LINE GND SHIELDING C1105 820P R1380 PBLOUT R1103 R1061 PBL_IN...

  • Page 95: Ac Inlet Circuit

    OP-AMP IC IC6701 C6701 0.01 C6704 C6705 560P C6706 C6702 R6701 R6705 R6703 L6701 0.47 50V4.7 J0JBC0000019 R6704 C6700 50V0.01 C6703 R6702 C6707 1000P L6702 J0JBC0000019 JK6701 COM B SA-AK370PL/GCP DECK MECHANISM/AC INLET/VOLTAGE SELECTOR/ MIC CIRCUIT VR6701 EVUF2AF15B14 MIC VOLUME...

  • Page 96: Usb Circuit

    SA-AK370PL / SA-AK370GCP 17.7. (I) USB Circuit SCHEMATIC DIAGRAM - 10 USB CIRCUIT : + B SIGNAL LINE : USB SIGNAL LINE IC951 C0DBZYE00002 VOLTAGE REGULATOR R972 C931 16V10 R971 D3.3V R951 0 C914 R950 CTRL FLAG C951 DGND R957 2.2K...
  • Page 97 SA-AK370PL / SA-AK370GCP 17.8. (J) D-Amp Circuit SCHEMATIC DIAGRAM - 11 D-AMP CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE : MAIN SIGNAL LINE FHOP FAN_DC JK5001 FRONT L- FRONT L+ TO SPEAKERS FRONT R- FAN_GND IC5500 FRONT R+...
  • Page 98 SA-AK370PL / SA-AK370GCP SCHEMATIC DIAGRAM - 12 D-AMP CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE : MAIN SIGNAL LINE C5445 C5450 IC5000 3 2 1 C1BA00000487 AUDIO DIGITAL POWER AMP ZJ5400 FR_+ C5008 C5009 C5007 C5024 C5025 C5001...

  • Page 99: Smps Circuit

    SA-AK370PL / SA-AK370GCP 17.9. (K) SMPS Circuit SCHEMATIC DIAGRAM - 13 SMPS CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE D5809 Q5861 - Q5862 MA2J11100L B1ABCF000176 TRANSFORMER TEMP DETECT H5801* DCDET +30V_SENSE +30V_SENSE FAN_18V D5801 +30V_SENSE B0HBSM000043 R5862 R5863...
  • Page 100 SA-AK370PL / SA-AK370GCP SCHEMATIC DIAGRAM - 14 SMPS CIRCUIT : +B SIGNAL LINE : -B SIGNAL LINE IC5780 C0ABBA000168 OP AMP R5751 -VCC IC5780 Q5750 B1ABCF000176 +VCC INVERTER R5790 D5796 D5796 MA2J11100L R5789 R5788 FOR GCP ONLY SYNC PC5702 B3PBA0000402...

  • Page 101: Printed Circuit Board

    SA-AK370PL / SA-AK370GCP 18 Printed Circuit Board Note: Circuit board diagrams may be modified at any time with the development of new technology.
  • Page 102 SA-AK370PL / SA-AK370GCP 18.1. (A) CD Servo P.C.B. & (I) USB P.C.B. CD SERVO P.C.B. (REPV0111A) USB P.C.B. (REPV0101C) (RF) TP51 C7227 TP19 W7014 TP14 C7204 W7015 C7226 R7212 TP18 TP50 C7228 TP17 R7218 C7216 C7230 TP13 R7221 CN7002 C7253...
  • Page 103 SA-AK370PL / SA-AK370GCP 18.2. (B) Main P.C.B. & (E) Music Port P.C.B. MAIN P.C.B. (REPX0648E...PL) MUSIC PORT P.C.B. (REPX0649E) (REPX0648F...GCP) S6820 Q2948 R2948 C2947 (EJECT) D2947 R2946 R2939 C2948 R2945 W2295 D2946 C2941 CN2811 W2288 Q2943 (FOR BUGGING) D2774 Q2949...
  • Page 104 SA-AK370PL / SA-AK370GCP 18.3. (C) Panel P.C.B., (D) Tact Switch P.C.B. & (F) Remote Sensor P.C.B. TACT SWITCH P.C.B. (REPX0649E) PANEL P.C.B. (REPX0649E) S6200 (OPEN/CLOSE) D6458 S6301 J6501B* (MANUAL EQ) S6100 (POWER) C6940 S6302 C6503 S6201 (RWD) C6512 (MULTI CHANGE)
  • Page 105 SA-AK370PL / SA-AK370GCP 18.4. (G) Deck P.C.B., (H) Deck Mechanism P.C.B. & (L) AC Inlet P.C.B. DECK P.C.B. (REPX0647A) DECK MECHANISM P.C.B. (REPX0321L) S972 W1930 (HALF) Q1309 CN1305 Q1310 R1380 CS971 S975 S971 (MODE) (RECINH_F) R973 C1317 R1331 W1977 IC971...
  • Page 106 SA-AK370PL / SA-AK370GCP 18.5. (J) D-Amp P.C.B. D-AMP P.C.B (REPX0638A) W5049 R5511 D5501 R5506 C5553 X5501 W5048 X5500 R5504 IC5500 C5557 R5023 C5551 C5552 C5550 W5071 D5503 IC5501 W5780 K5004 W5007 W5033 R5505 K5401 C5000 W5032 W5044 C5117 W5004 C5005...
  • Page 107 SA-AK370PL / SA-AK370GCP 18.6. (K) SMPS P.C.B. SMPS P.C.B. (REPX0676D...PL) (REPX0676E...GCP) R5809 R5807 W5806 R5820 R5821 W5803 PC5720 0 5 6 2 A / C - 3 R5730 0 5 6 2 A / C - 3 Q5862 D5725 QR5810...
  • Page 108 SA-AK370PL / SA-AK370GCP 18.7. (M) Voltage Selector P.C.B. (GCP Only) & (N) Mic P.C.B. VOLTAGE SELECTOR P.C.B. (REPX0676E...GCP ONLY) VOLT ADJ S5701 0562C-3 0562C-3 (VOLTAGE SELECTOR) WHT BLU MIC P.C.B. (REPX0649E) VR6701 MIC VOLUME CN6701 C6701 W6013 C6702 JK6701 R6701...

  • Page 109: Illustration Of Ics, Transistors And Diodes

    SA-AK370PL / SA-AK370GCP 19 Illustration of ICs, Transistors and Diodes C0DAAYY00042 C1AA00000612 (5P) C0JBAB000902 (14P) MN6627954MA (100P) C0JBAF000716 (14P) C0HBB0000057 (44P) C0ABBB000230 (8P) RFKWAK270PL (100P) C1AB00002885 (52P) MNZSFB5KJM2 (64P) C0AABB000125 (8P) C1BA00000487 (23P) C0DABFC00002 (3P) AN7326K (22P) BA5948FPE2 C0CAAKG00046 C0ABBA000168 (8P)

  • Page 110: Terminal Function Of Integrated Circuits

    SA-AK370PL / SA-AK370GCP 20 Terminal Function of Integrated Circuits 20.1. IC2801 (RFKWAK270PL) Pin No. Mark Function BASS JOG2 Bass Jog 2 System Microprocessor VERR Verify error for USB version up using CD Pin No. Mark Function MMOD0 Micon mode switching for USB...
  • Page 111 SA-AK370PL / SA-AK370GCP Pin No. Mark Function Key Data Input 1 (No Connection) Supply Voltage, Negative Terminal Power Supply (+5V) Segment Output 18 Segment Output 17 Segment Output 16 Segment Output 15 Segment Output 14 Segment Output 13 Segment Output 12...
  • Page 112 SA-AK370PL / SA-AK370GCP...

  • Page 113: Exploded Views

    SA-AK370PL / SA-AK370GCP 21 Exploded Views 21.1. Cabinet Parts Locations...
  • Page 114 SA-AK370PL / SA-AK370GCP...
  • Page 115 SA-AK370PL / SA-AK370GCP 21.2. Deck Mechanism Parts Locations (RAA4407-S)
  • Page 116 SA-AK370PL / SA-AK370GCP 21.3. Packaging...

  • Page 117: Replacement Parts List

    SA-AK370PL / SA-AK370GCP 22 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 118 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks CASSETTE DECK PCB1 REPX0676D SMPS P.C.B. (RTL) REDX0001 R/P HEAD BLOCK SUB ASS’Y REPX0676E SMPS P.C.B. RDG0300 REEL BASE GEAR...
  • Page 119 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks Q1312 B1ABCF000011 TRANSISTOR D2909 MAZ82400HL DIODE Q1314 B1GDCFGH0002 TRANSISTOR D2936 B0EAKM000117 DIODE Q1315 B1ACKD000006 TRANSISTOR D2940 MA2J11100L DIODE Q1316...
  • Page 120 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks S6202 EVQ21405RJ SW SINGLE CHANGE LB846 J0JAC0000021 INDUCTOR S6203 EVQ21405RJ SW CD1 LB848 J0JAC0000021 INDUCTOR S6204 EVQ21405RJ SW CD2...
  • Page 121 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks P5701 K2AA2B000017 AC INLET [M] GCP W7003 D0GDR00JA017 0 1/10W W7004 D0GBR00JA008 0 1/16W P5701 K2AB2B000010 AC INLET W7005...
  • Page 122 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R1209 D0GB102JA008 1K 1/16W R2311 D0GB471JA008 470 1/16W R1210 D0GB333JA008 33K 1/16W R2312 D0GB471JA008 470 1/16W R1302 D0GB471JA008 470 1/16W...
  • Page 123 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R2721 D0AF2R2JA039 2.2 1/2W R2897 D0GB102JA008 1K 1/16W R2722 D0AF2R2JA039 2.2 1/2W R2900 D0GB562JA008 5.6K 1/16W R2733 D0GB391JA008 390 1/16W...
  • Page 124 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R5671 ERJ3GEY0R00V 0 1/10W R5891 ERJ3RBD333V 33K 1/16W R5701 ERDS1TJ475B 4.7M 1W R5892 ERJ3RBD472V 4.7K 1/16W R5702 ERJ1TYJ104U 100K 1W...
  • Page 125 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R7331 D0GB223JA008 22K 1/16W C1371 F1H1E103A029 0.01uF 25V R7332 D0GB102JA008 1K 1/16W C2002 F1H1H103A219 0.01uF 50V R7335 ERJ3GEYJ101V 100 1/10W...
  • Page 126 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C2357 F1H1H102A219 1000pF 50V C5016 ECJ1VB1H104K 0.1uF 50V C2358 F1H1H102A219 1000pF 50V C5017 ECJ1VB1H104K 0.1uF 50V C2365 ECEA1EKN4R7B 4.7uF 25V...
  • Page 127 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C5550 ECJ1VB1H103K 0.01uF 50V C5840 F1J2E1030004 0.01uF 250V C5551 ECJ1VB1H391K 390pF 50V C5841 F1J2E1030004 0.01uF 250V C5552 ECJ1VB1H391K 390pF 50V...
  • Page 128 SA-AK370PL / SA-AK370GCP Ref. No. Part No. Part Name & Description Remarks C7230 ECJ1VB1C104K 0.1uF 16V C7231 F2A0J221A200 220uF 6.3V C7232 F2A0J221A200 220uF 6.3V C7233 F1H1C104A008 0.1uF 16V C7234 ECJ1VB1C104K 0.1uF 16V C7235 F2A1C100A133 10uF 16V C7241 F1H1H102A219 1000pF 50V...

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