DHC-MD777, HMC-MD777 — Sony Audio Service Manual (repair manual)

Model
DHC-MD777 HMC-MD777
Pages
108
Size
7.32 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
dhc-md777-hmc-md777.pdf
Date

View Sony DHC-MD777 / HMC-MD777 Service Manual online

SERVICE MANUAL
CD PLAYER/MINI DISC DECK
E Model
SPECIFICATIONS
HMC-MD777
HMC-MD777 is the CD player and
MD Deck section in DHC-MD777.
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
CDM53-K1BD33
Base Unit Name
BU-K1BD33
Optical Pick-up Name
KSM-213BFN
Model Name Using Similar Mechanism
HCD-MD515
MD Mechanism Type
MDM-C1F
Base Unit Name
MBU-C1F
Optical Pick-up Name
KMS-260B
CD
Section
MD
Section
U.S.  and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Ver. 1.2  2006.09
9-922-985-13
2006I05-1
© 2006.09
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
– 2 –
SELF-DIAGNOSIS FUNCTION
MD  SECTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes
which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the
following box  in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for
using the Self-Diagnosis Function (Error History Display Mode)”.
PROCEDURE  FOR  USING  THE  SELF-DIAGNOSIS  FUNCTION  (ERROR  HISTORY  DISPLAY  MODE)
Note:
Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required procedure. Be
careful not to enter other modes by mistake. If you set other modes accidentally, press the
[MENU/NO]
button to exit the mode.
1. While pressing the both
[ENTER/YES]
and
π buttons, turn the power ON.
(“TEMP CHECK” will be displayed)
2. Press the
[MENU/NO]
button to display “[CHECK]”.
3. Turn the
± dial and when “[Service]” is displayed, press the
[ENTER/YES]
button.
4. Turn the
± dial to display “ERR DP MODE” (C17).
5. Press the
[ENTER/YES]
button to sets the error history mode and displays “total rec”.
6. Select the contents to be displayed or executed using the
± dial.
7. Press the
[MD WALKMAN SYNC]
button to display or execute the contents selected.
8. Press the
[MD WALKMAN SYNC]
button again and returns to step 5.
9. When press the
[MENU/NO]
button to displays “ERROR DP MODE”, exits the error history mode.
10. To exit the test mode, press the
[REPEAT]
button. The disc is ejected when loaded, and set will be normal mode.
– 3 –
Items of Error History Mode Items and Contents
Display
Details of History
0π E00
No error
0π E01
Disc error. PTOC cannot be read
(DISC ejected)
0π E02
Disc error. UTOC error
(DISC not ejected)
0π E03
Loading error
0π E04
Address cannot be read (Servo has deviated)
Table of Error Codes
Error Code
Error Code
Details of Error
total rec
Displays the recording time.
Displayed as “rππππππh”.
The displayed time is the total time the laser is set to the high power state.
This is about 1/4 of the actual recording time.
The time is displayed in decimal digits from 0h to 65535h.
total play
Displays the play time.
Displayed as “pππππππh”. The time displayed is the total actual play time. Pauses are not counted.
The time is displayed in decimal digits from 0h to 65535h.
retry err
Displays the total number of retries during recording and number of retry errors during play.
Displayed as “rππ pππ”.
“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 ππ”.
The number of errors is displayed in hexadecimal digits from 00 to FF.
err history
Displays the 10 latest errors.
Displayed as “0π [email protected]@”.
π 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 turning the
≠ ˜ ± dial.
er refresh (*1)
Mode which erases the “retry err”, “total err”, and “err history” histories
When returning the unit to the customer after completing repairs, perform this to erase the past error history.
After pressing the
[MD WALKMAN SYNC]
button and “er refresh?” is displayed, press the
[ENTER/YES]
button
to erase the history.
“Complete!” will be displayed momentarily.
Be sure to check the following when this mode has been executed.
• The data has been erased.
• The mechanism operates normally when recording and play are performed.
tm refresh (*1)
Mode which erases the “total rec” and “total play” histories.
These histories serve as approximate indications of when to replace the optical pickup.
If the optical pickup has been replaced, perform this operation and erase the history.
After pressing the
[MD WALKMAN SYNC]
button and “tm refresh?” is displayed, press the
[ENTER/YES]
button
to erase the history.
“Complete!” will be displayed momentarily.
Be sure to check the following when this mode has been executed.
• The data has been erased.
• The mechanism operates normally when recording and play are performed.
0π E05
FOK has deviated
0π E06
Cannot focus (Servo has deviated)
0π E07
Recording retry
0π E08
Recording retry error
0π E09
Playback retry error
(Access error)
0π E0A
Playback retry error
Details of Error
(*1) If “err refresh” or “tm refresh” is performed, the error history data are all erased. Only when “OP Replacement” was executed,
perform this operation to clear the error history data, otherwise, never perform this operation.
– 4 –
CD  SECTION
OPERATING  THE  DISPLAYED  HISTORIES
1. Press the
[PLAY MODE]
and
[REPEAT]
button simulta-
neously, and the count of mechanical error and “NO DISC”
that optical system judged are displyed.
(*1)  Mechanical error code
Emc= 
Count of mechanical error
Count of “NO DISC”
**
Edc= 
**
2. Under this condition press the buttons in Table 1, and the re-
spective operations are executed as listed below.
Table 1.
Button
Function
CD 1
Mechanical error cord from latest one to last ten are dis-
played each time this button is pressed.  (*1)
CD 2
The reasons of “NO  DISC” from latest one to last ten are
displayed each time this button is pressed.  (*2)
§ (CD1)
Reset the count of mechanical error.
§ (CD2)
Reset the count of  “NO  DISC”.
E
**
M
**   **   **   **   **      
(a)
(b)
(c)
(d)
(e)
(f)
E
**
D
**   **   **
(a)
(b)
(c)
(d)
(*2)  NO  DISC error code
(a)
The number of Mechanical error.
Latest one “00” to last ten “09”
(Turn the
± dial and change the error No.)
(b)
“FF”
: Mechanical error, when mechanical initialize to
completion.
(c)
“1
*
: Mechanical error in the midst of sub tray loading
“2
*
 from the stocker.
(d)
**
” : Don’t care. (not used in servicing)
(e)
“2
*
: Mechanical error in the midst of the stocker up/
down.
(f)
“2
*
: Mechanical error of the clamper or in the midst of
changing the mode.
(a)
The number of NO DISC error.
Latest one “00” to last ten “09”
(Turn the
± dial and change the error No.)
(b)
“01”: Focus error
“02”: GFS error
“03”: Set up error
(c)
“00”: NO DISC error (Did not chucking retry)
“02”: NO DISC error (Chucking retry to completion)
(d)
The status, when judged NO  DISC error.
“1
*
” : Stop
“2
*
” : Set up
“3
*
” : TOC read
“4
*
” : Access
“5
*
” : Play
“6
*
” : Pause
“7
*
” : Manual search (Play)
“8
*
” : Manual search (Pause)
Page of 108

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