Sony MDS-JB920 service manual Retry Cause Display Mode, Precedure

Page 9

Retry Cause Display Mode

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] button. When “Edit/Menu” is displayed on the fluorescent display tube, rotate the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “All Erase?”.

3.Press the [YES] button. (Or press the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob)

4.When “All Erase??” is displayed on the fluorescent display tube, the music calendar number blinks.

5.Press the [YES]button to display “Complete!!”, and press the [ÊÊ]p button immediately. Wait for about 15 seconds while pressing the button. (The [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob can be pressed instead of the [YES]button for the same results.)

6.When the “TOC” displayed on the fluorescent display tube goes off, release the [ÊÊ]p button.

7.Press the [ÊÊÊÊREC]r button to start recording. Then press the [ÊÊÊ]P button and start recording.

8.To check the “track mode”, press the [ÊÊÊÊÊ]á button to start play.

9.To exit the test mode, press the [ÊÊÊÊÊ]1/u button, and turn OFF the power. When “TOC” disappears, disconnect the power plug from the outlet. If the test mode cannot be exited, refer to “Forced Reset” on page 8.

Fig. 1 Reading the Test Mode Display

Fig. 2 Reading the Test Mode Display

(During recording and stop)

(During playback)

RTs@@c##c**

Fluorescent display tube display

@@: Cause of retry ## : Number of retries

** : Number of retry errors

@@####**$$ Fluorescent display tube display

@@: Parts No. (name of area named on TOC) ## : Cluster

**: Sector

$$ : Track mode (Track information such as copy- right information of each part)

Reading the Retry Cause Display

 

Higher Bits

Lower Bits

Hexa-

 

 

 

 

 

 

 

 

 

 

 

Cause of Retry

Occurring conditions

Hexadecimal

8

4

2

1

8

4

2

1

decimal

Bit

b7

b6

b5

b4

b3

b2

b1

b0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Binary

0

0

0

0

0

0

0

1

01

shock

When track jump (shock) is detected

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

0

0

1

0

02

ader5

When ADER was counted more than five times

 

continuously

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

0

1

0

0

04

Discontinuous address

When ADIP address is not continuous

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

1

0

0

0

08

DIN unlock

When DIN unlock is detected

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

1

0

0

0

0

10

FCS incorrect

When not in focus

 

0

0

1

0

0

0

0

0

20

IVR rec error

When ABCD signal level exceeds the specified range

 

0

1

0

0

0

0

0

0

40

CLV unlock

When CLV is unlocked

 

 

 

 

 

 

 

 

 

 

 

 

 

1

0

0

0

0

0

0

0

80

Access fault

When access operation is not performed normally

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example

When 42 is displayed:

Higher bit: 4 = 0100 nb6

Lower bit : 2 = 0010 nb1

In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed:

Higher bit: A = 1010 nb7+b5

Lower bit : 2 = 0010 nb2

The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.

– 9 –

Image 9
Contents Specifications MDS-JE520MDM-5A General SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Table of Contents DiagramsSection Servicing Notes Flexible Circuit Board Repairing VarningVaroitus IOP JIG for Checking BD Board WaveformRecord Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetREC/PLAY Precedure Retry Cause Display ModeHexadecimal nBinary Conversion Table Section General Location of ControlsFront view Rear view Page Page Case Section DisassemblyMain Board Front Panel SecitonSlider CAM Mechanism Section MDM-5ASW BOARD, Loading Motor M103 Base Unit MBU-5A, BD BoardPrecautions for USE of Test Mode Section Test ModeSetting the Test Mode Exiting the Test ModeDisplay Contents Mark Group Selecting the Test ModeOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID Functions of Other Buttons Test Mode DisplaysAuto gain display Not used in servicing Detrack check display Not used in servicingMeanings of Other Displays Display Contents When Lit When OffParts Replacement and Adjustment Section Electrical AdjustmentsPrecautions for USE of Optical PICK-UP KMS-260A Precautions for Checking Laser Diode EmissinonPrecautions for Adjustments Laser power meterLaser Power Check Temperature Compensation Offset CheckCheck Prior to Repairs Traverse CheckCD Error Rate Check Play Checking MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckTemperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Section Diagrams BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMPIC PIN Function Description Sens SrdtXrst SqsyXWE XrasMvci AsyoSfdr SrdrSprd SpfdMain Board IC100 CXD8607N A/D Converter VDD1 AvddlTEST2 LvddMain Board IC800 M30610MCA-264FP System Controller MDS-JB920 ∙ Signal Path Block Diagram Servo SectionREC Analog REC DigitalBlock Diagram Main Section ∙ Signal Path Play Analog OUTPlay Digital OUT Circuit Boards Location Printed Wiring Boards BD Section MDS-JB920 53 for Waveforms. See page 70 and 71 for IC Block Diagrams Schematic Diagram BD /2 SeeWaveforms BD board Main board Disp board MDS-JB920 MDS-JB920 MDS-JB920 MDS-JB920 Other layers pattern Side a US, CND Schematic Diagram Panel Section See page 54 for Waveforms Printed Wiring Board BD Switch Section Schematic Diagram BD Switch SectionIC Block Diagrams BD Board IC101 CXA2523ARIC152 BH6511FS-E2 IC121 CXD2654RIC101 CXA8054M Main Board IC100 CXD8607NIC203 CXA8042ASIC200 CXD8767N SN74HCU04ANS-E20 SN74HC153ANSChassis Section Section Exploded ViewsSupplied with RV760 Front Panel Section206 201 204 205209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List Diode TANTAL. ChipDiode F1J6TP CXA2523ARDisp Main C252 Mylar HZ7.5CP-TK HZS6C1LCXA8042AS SN74HC153ANS390 Coil with Core Vibrator Main PSWLED SEL6210S-TH10 Standby LED SEL6810A-TH10 Mega Control TransistorSW VOL Sony Corporation