DOWNLOAD Sony MDS-NT1 Service Manual ↓ Size: 2.74 MB | Pages: 70 in PDF or view online for FREE

Model
MDS-NT1
Pages
70
Size
2.74 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mds-nt1.pdf
Date

Sony MDS-NT1 Service Manual ▷ View online

3
MDS-NT1
ITEMS  OF  ERROR  HISTORY  MODE  ITEMS  AND  CONTENTS
Selecting the Test Mode
Display
Details of History
op rec tm
Cumulative recording time is displayed.
When cumulative recording time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
The displayed time shows how long the laser is in high power state.
It is about one fourth the actual recording time.
op play tm
Cumulative playing time is displayed.
When cumulative playing time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
spdl rp tm
Cumulative spindle motor running time is displayed.
When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
retry err
Displays the total number of retries during recording and number of retry errors during play.
Displayed as “rss pss”.
“r” indicates the retries during recording while “p” indicates the retry errors during play.
The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.
total err
Displays the total number of errors.
Displayed as “total ss”.
The number of errors is displayed in hexadecimal digits from 00 to FF.
err history
Displays the 10 latest errors.
Displayed as “0s ErrCd@@”.
s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest).
@@ indicates the error code.
Refer to the following table for the details. The error history can be switched by clicking the 
[JOG UP]
 or
[JOG DOWN]
.
retry adrs
Displays the past five retry addresses.
Displays “ss ADRS ssss”, ss is the history number, ssss is the cluster with the retry error.
Select the error history number using the 
[JOG UP]
 or 
[JOG DOWN]
.
er refresh
Mode to clear the error history and retry address history.
[Operating method]
1) Click the 
[JOG UP]
 or 
[JOG DOWN]
 when “er refresh” is displayed.
2) The display will change to “er refresh?”, and then click the 
[ENTER/YES]
.
The operation is over if “Complete!” is displayed.
After this mode was executed, check the following:
• The data have been cleared.
• Perform the recording and playing to check that the mechanism operates normally.
tm refresh
Mode to clear the “op rec tm” and “op play tm” histories.
These histories serve as approximate indications of when to replace the optical pick-up. If the optical pick-up
has been replaced, perform this operation and clear the history.
[Operating method]
1) Click the 
[JOG UP]
 or 
[JOG DOWN]
 when “tm refresh” is displayed.
2) The display will change to “tm refresh?”, and then click the 
[ENTER/YES]
.
The operation is over if “Complete!” is displayed.
After this mode was executed, check the following:
• The data have been cleared.
• Perform the recording and playing to check that the mechanism operates normally.
op change
Mode to clear cumulative time of “op rec tm” and “op play tm”.
These historical data are used to determine the timing when the optical pick-up is to be replaced. When the
optical pick-up was replaced, perform this operation to clear historical data.
[Operating method]
1) Click the 
[JOG UP]
 or 
[JOG DOWN]
 when “op change” is displayed.
2) The display will change to “op chang?”, and then click the 
[ENTER/YES]
.
The operation is over if “Complete!” is displayed.
spdl change
Mode to clear cumulative time of “spdl rp tm”.
This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle
motor was replaced, perform this operation to clear historical data.
[Operating method]
1) Click the 
[JOG UP]
 or 
[JOG DOWN]
 when “spdl change” is displayed.
2) The display will change to “spdl chang?”, and then click the 
[ENTER/YES]
.
The operation is over if “Complete!” is displayed.
4
MDS-NT1
Error Code
Details of Error
10
Loading failed
12
Loading switch combination is illegal
20
Head of PTOC could not be read within the
specified time
21
Head of PTOC could be read but its content is
erroneous
22
Access to UTOC could not be made within the
specified time
23
UTOC could be not read within the specified
3time
24
Content of UTOC is erroneous
30
Playing could not start
31
Content of sector is erroneous
40
Cause of retry occurred during normal recording
41
D-RAM overflowed and retry was executed
42
Retry was executed during the writing to TOC
43
S.F editing was interrupted by retry
50
Address could not be read except in access
processing
51
Focusing failed and it is out of control
60
Unlock retry
Table of Error Codes
5
MDS-NT1
SELF-DIAGNOSIS FUNCTION
...........................
2
1.
SERVICING  NOTES
...............................................
7
2.
GENERAL
................................................................... 12
3.
DISASSEMBLY
3-1. Disassembly Flow ........................................................... 13
3-2. Case (Upper) ................................................................... 14
3-3. Main Board ...................................................................... 15
3-4. MD Mechanism Deck (MDM-7S2B) ............................. 15
3-5. Front Panel Section ......................................................... 16
3-6. BD Board, Over Write Head (HR901) ........................... 16
3-7. Holder Assy ..................................................................... 17
3-8. Loading Motor Assy (M103) .......................................... 17
3-9. Sled Motor Assy (M102) ................................................ 18
3-10. Optical Pick-Up (KMS-262E) ........................................ 18
3-11. Spindle Motor Assy (M101) ........................................... 19
4.
TEST  MODE
.............................................................. 20
5.
ELECTRICAL  ADJUSTMENTS
........................ 24
6.
DIAGRAMS
6-1. Block Diagram – SERVO Section – ............................... 36
6-2. Block Diagram – MAIN Section – ................................. 37
6-3. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 38
6-4. Printed Wiring Board – BD Board – .............................. 39
6-5. Schematic Diagram – BD Board (1/2) – ........................ 40
6-6. Schematic Diagram – BD Board (2/2) – ........................ 41
6-7. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 42
6-8. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 43
6-9. Schematic Diagram – MAIN Board (1/2) – ................... 44
6-10. Schematic Diagram – MAIN Board (2/2) – ................... 45
6-11. Printed Wiring Board – Panel Board – ........................... 46
6-12. Schematic Diagram – Panel Board – .............................. 47
6-13. IC Pin Function Description ........................................... 51
7.
EXPLODED  VIEWS
7-1. Case Section .................................................................... 59
7-2. Front Panel Section ......................................................... 60
7-3. Case (B) Section .............................................................. 61
7-4. MD Mechanism Deck Section-1 (MDX-7S2B) ............. 62
7-5. MD Mechanism Deck Section-2 (MDX-7S2B) ............. 63
8.
ELECTRICAL  PARTS  LIST
............................... 64
TABLE  OF  CONTENTS
6
MDS-NT1
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
The laser  component in this product
is capable of emitting radiation
exceeding  the limit for Class  1.
This appliance is classified as a CLASS 1
LASER  product.  The CLASS  1 LASER
PRODUCT MARKING is located on the
bottom exterior.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED  LINE
WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS  WHOSE
PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  MANUAL
OR  IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
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  • DOWNLOAD Sony MDS-NT1 Service Manual ↓ Size: 2.74 MB | Pages: 70 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony MDS-NT1 in PDF for free, which will help you to disassemble, recover, fix and repair Sony MDS-NT1 Audio. Information contained in Sony MDS-NT1 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.