Sony HCD-C5 service manual Checks Prior to Parts Replacement and Adjustments in MD, Precedure

Page 30

HCD-C5

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

 

Criteria for Determination

 

Measure if unsatisfactory

 

(Unsatisfactory if specified value is not satisfied)

 

 

 

 

 

Laser power check

•

0.9 mW power

• Clean the optical pick-up

(6-2 : See page 37)

 

Specified value : figure1

•

Adjust again

 

•

7.0 mW power

•

Replace the optical pick-up

 

 

Specified value : figure2

 

 

 

 

 

 

 

 

 

Iop (at 7.0mW)

•

Replace the optical pick-up

 

•

Labeled on the optical pick-up

 

 

 

 

Iop value ± 10mA

 

 

 

 

 

 

 

Auto check

•

Unsatisfactory if displayed as “NG: XXXX”

•

Replace the optical pick-up

(6-4 : See page 38)

 

(X is an arbitrary number)

 

 

 

 

 

 

Temperature

•

Unsatisfactory if displayed as “T=@@ (##) [NG]”

• Check for disconnection of the circuits around D101

compensation

 

(@@, ## are both arbitrary numbers)

 

(BD (MD) board)

offset check

 

 

•

Check the signals around IC101, IC151, CN102, CN103

(6-1 : See page 37)

 

 

 

(BD (MD) board)

 

 

 

 

 

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjust- ments.

When performing adjustments, use the specified values for adjustments.

Figure1:

SPECIFIED VALUE

KMS-260B

0.85 to 0.91 mW

 

 

KMS-260E

0.90 to 0.96 mW

 

Figure2:

 

 

 

 

 

SPECIFIED VALUE

KMS-260B

6.8 to 7.2 mW

 

 

KMS-260E

7.0 to 7.5 mW

 

RETRY CAUSE DISPLAY MODE IN MD

•In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set.

This is useful for locating the faulty part of the unit.

•The following will be displayed :

During recording and stop : Retry cause, number of retries, and number of retry errors.

During playback: Information such as type of disc played, part played, copyright.

These are displayed in hexadecimal.

Precedure:

1.Load a recordable disc whose contents can be erased into the unit.

2.Press the MENU/NO “R” button. When “Edit Menu” is displayed on the fluorescent indicator tube, press the

. “R” or > “R” button to display “All Erase?”.

3.Press the ENTER/YES “R” button.

4.When “All Erase??” is displayed on the fluorescent indicator tube.

5.Press the ENTER/YES “R” button to display “Complete!”.

6.

Press the

 

REC/REC IT

 

button to start recording. Then press the

u

button and start recording. If recording cannot be performed,

 

press the

FUNCTION z

button and set a different function.

 

 

7.

Press three buttons of

 

 

,

 

and

 

simultaneously to enter the retry cause display mode.

VOL -

u

CD SYNC HIGH

8.To check the “track mode”, press the u button to start playback.

9.To release this mode, press the ?/1 button to turn the power off. When “TOC” goes off, disconnect the power plug from the outlet.

If the test mode cannot be released, refer to “Factory Preset” on page 24.

30

Page 29 Page 31
Image 30
Page 29 Page 31
Contents OPTIMA-720L1E SpecificationsTT Base Assy MDM-7B4MHCD-C5 SELF-DIAGNOSIS FunctionDiagrams Table of ContentsElectrical Adjustments Exploded Views Electrical Parts ListFlexible Circuit Board Repairing HCD-C5 Section Servicing NoteService Position of the CD Mechanism Deck Service Position of the MD Mechanism DeckJIG for Checking BD MD Board Waveform IOPSection General Parts IdentificationRemote control Parts IdentificationHCD-C5 Section Disassembly SET Bottom PLATE, CaseBottom PLATE, Case Panel BoardCD Mechanism Deck TN-CCD1001Z, BD CD Board CN1Connector Board Front Bracket SECTION, Loading Motor Assy M902 SW Board Feed Motor Assy M903 Rear Damper BracketOptical PICK-UP OPTIMA-720L1E Base Section Spindle Motor Assy M904 Jack BOARD, HP BOARD, Rear CoverUcom BOARD, AMP Power Board Tuner PACK, D. C. FAN M901Audio BOARD, Power BOARD, Power Transformer T900 Connector CN105MD Mechanism Deck MDM-7B4M, MD Digital Board Holder AssyBD MD Board Loading Motor M703, Spindle Motor M701, Sled Motor M702Over Write Head OP-SUB SectionHCD-C5 Section Test Mode Releasing the Test Mode Precautions for USE of Test ModeSetting the Test Mode MD SecitonBasic Operations of the Test Mode Selecting the Test ModeENTER/YES R Operating the Continuous Playback Mode Functions of Other Buttons Automatic SELF-DIAGNOSIS FunctionInformation When Memory NG is Displayed Record ProcedureDisplay Precedure Criteria for Determination Measure if unsatisfactory Checks Prior to Parts Replacement and Adjustments in MDRetry Cause Display Mode in MD PrecedureReading the Retry Cause Display Reading the DisplayExample Bit When Binary DetailsSection Electrical Adjustments HCD-C5 CD SectionRF Level Check Parts Replacement and Adjustment Check before replacementMD Section Adjustment flow YESPrecautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK-UP KMS-260B/260E Laser power meterLaser Power Check Using the Continuously Recorded DiscTemperature Compensation Offset Check Checks Prior to RepairsAuto Check Other ChecksTraverse Check Focus Bias Check Play CheckSelf-Recording/playback Check Laser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Method of identifying the optical pick-up KMS-260B/260EIop NV Save Read power traverse adjustment CD Error Rate Check Focus Bias AdjustmentError Rate Check MO Error Rate CheckMO Auto Gain Control Output Level Adjustment Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment Adjustment and checking LoacationWaveforms Section Diagrams HCD-C5Circuit Boards Location AUSBlock Diagram CD Servo Section OPTIMA-720L1EBlock Diagram MD Servo Section APCBlock Diagram Main Section Tape MD-LLocation SemiconductorIC B/D Location Side a Location Side BIC B/D 153 IC201 10K 1/16W Printed Wiring Board Ucom Board Semiconductor LocationDigital Optical Input Speaker IC302 D301 1SS355TE IC602 HCD-C5 IC901 Schematic Diagram Power Section IC Block Diagrams IC101 CXD3068Q BD CD Board IC103 CXA2581N-T4 BD CD BoardIC102 BA5982FP-E2 BD CD Board IC201 ∝ DA1360TS MD Digital Board IC141 BH6519FS-E2 BD MD BoardVssd Selstatic TEST1 Reset Bcko Vddd CRtcb Vddd PREEM0 NC NC TEST2 Vssd C L3DATAIC601 M66004M8FP-200D Panel Board IC PIN Function Description IC101Xrst SrdtSens SqsyAvdd AsyoAsyi BiasSpfd TEST1TEST2 TEST3 Dvss IC701 PLAY-SW ResetDA-RESET REC-SWIC501 Bvdd SPK-RELAYHelp BvssSection Exploded Views Overall SectionFront Panel Section 110 Chassis102 104 111 103 112 114 105 101 106 107 108 113152 155 154156 157 151 158 155 A-4725-732-A MD Digital BOARD, CompleteCD Mechanism Deck Section TN-CCD1001Z CD Mechanism Deck Secti Front Bracket Section TN-CCD1001Z CD Mechanism Deck Section Base Section TN-CCD1001Z CD Mechanism Deck Section Chassis Section TN-CCD1001Z MD Mechanism Deck MDM-7B4M 758 761 757 756 751 761760 762 763 764 759 753754 755 752AMP Audio Section Electrical Parts List Audio HCD-C5 BD CDDiode UDZ-TE-17-3.9B Ferrite Bead CONNECTOR, FFC 29PHCD-C5 BD CD FerriteBD CD HCD-C5 BD MD HCD-C5 BD MD BD MD Connector Jack HCD-C5 MD DigitalFerrite 0UH HCD-C5 MD Digital PanelFerrite Bead / Conductor InductorPanel Power Power Ucom Connector DIN 8P CONNECTOR, FFC 16PCONNECTOR, Round Type 6P PIN, Connector 4P DiodeR225 216-841-11 TRANSFORMER, Power AEP,UK,AUS Wire Flat Type 19 CoreSwitch Detection Limit Hardware ListHCD-C5 Revision History
Top Page Image Contents