Sony MX-E501 service manual Section Servicing Notes

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MZ-E501

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-4E)

The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled with care.

When repairing this device with the power on, if you remove the main board, this device stops working.

In this case, you work without the device stopping by fastening the hook of the Open/Close detection switch (S809).

Open/Close detection switch (S809)

*Replacement of CXD2671-205GA (IC601) used in this set requires a special tool.

laser-tap

OPTICAL PICK-UP FLEXIBLE BOARD

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Contents MZ-E501 SpecificationsExploded Views Table of ContentsDisassembly DiagramsSection Servicing Notes Location and Function of Controls Group Section GeneralCase ASSY, Holder Assy Section DisassemblyBracket Assy Mechanism DeckOptical PICK-UP Assy LCX-4E Main BoardSection Test Mode Setting the Test ModeGeneral Manual Mode Overall Adjustment ModeHow to set the Manual mode Self-diagnostic mode SELF-DIAGNOSTIC Display ModeEIB KEY Check ModeSound Skip Check Result Display Mode Setting the Key Check modeSection Electrical Adjustments Manual Power AdjustmentsReset NV Vc PWM Duty H adjustment method Electrical offset adjustment methodOverall CD and MO adjustment method Resume clear method Overall CD and MO adjustment itemsMZ-E501 Waveforms Section DiagramsMain Board Block DiagramSemiconductor Printed Wiring Board Main Section Side aSide B Printed Wiring Board Main Section Side BOprledgh MZ-E501 2222 IC301 TA2131FL EL IC Block DiagramsIC901 XPC18A32FCR2 IC PIN Function Description MIFVSS3 OprledglXtest OprledrlDSPVSS0 AVS2 AvssAPC DSPVDD0Spcv DSPVDD2DSPVSS1 SpcuVL PWM TEST1, TEST0SSB CLK MCUVSS0TSB SLV CHK LCD STBLCD RST REC LEDMain Section Section Exploded Views5961 Mechanism SectionSection Electrical Parts List MainXPC18A32FCR2 Ver 1.1 Memo MZ-E501 Before change After change How to distinguish the sets¥ Signal path Main Board Main Board + Line Tantalums Schematic Diagram Main /3 See page 9 for IC Block Diagrams IC Block Diagrams IC901 XPC18A32FCR2 Signal C input from the optical pick-up detector IC601 CXD2671-207GA System Control AVS2 Avss DSPVDD2 188,189 Not used open 190 LCD STB 1uF 10% C102 126-246-11 IC XPC18A32FCR2 SWITCH, Tactile VOL− Ver Date Description of Revision Revision History
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