Sony DHC-MD777 / HMC-MD777 Service Manual ▷ View online
– 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.
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)
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)
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
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
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
“02”: GFS error
“03”: Set up error
(c)
“00”: NO DISC error (Did not chucking retry)
“02”: NO DISC error (Chucking retry to completion)
“02”: NO DISC error (Chucking retry to completion)
(d)
The status, when judged NO DISC error.
“1
“1
*
” : Stop
“2
*
” : Set up
“3
*
” : TOC read
“4
*
” : Access
“5
*
” : Play
“6
*
” : Pause
“7
*
” : Manual search (Play)
“8
*
” : Manual search (Pause)
– 5 –
TABLE OF CONTENTS
SELF-DIAGNOSIS FUNCTION
....................................
2
1.
SERVICING NOTES
...............................................
6
2.
GENERAL
................................................................... 13
3.
DISASSEMBLY
......................................................... 15
4.
TEST MODE
.............................................................. 27
5.
ELECTRICAL ADJUSTMENTS
......................... 32
6.
DIAGRAMS
6-1. Block Diagram – CD SERVO Section – ....................... 41
6-2. Block Diagram – MD SERVO Section (1/2) – ............. 43
6-3. Block Diagram – MD SERVO Section (2/2) – ............. 45
6-4. Block Diagram
6-2. Block Diagram – MD SERVO Section (1/2) – ............. 43
6-3. Block Diagram – MD SERVO Section (2/2) – ............. 45
6-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 47
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 50
6-6. Printed Wiring Board – BD (CD) Section – .................. 51
6-7. Schematic Diagram – BD (CD) Section – .................... 53
6-8. Printed Wiring Boards
6-7. Schematic Diagram – BD (CD) Section – .................... 53
6-8. Printed Wiring Boards
– CD MOTOR/SENSOR Section – ................................ 55
6-9. Schematic Diagram
– CD MOTOR/SENSOR Section – ................................ 57
6-10. Schematic Diagram – BD (MD) Section (1/2) – ........... 59
6-11. Schematic Diagram – BD (MD) Section (2/2) – ........... 61
6-12. Printed Wiring Board – BD (MD) Section – ................. 63
6-13. Printed Wiring Boards
6-11. Schematic Diagram – BD (MD) Section (2/2) – ........... 61
6-12. Printed Wiring Board – BD (MD) Section – ................. 63
6-13. Printed Wiring Boards
– MD MOTOR/SENSOR Section – ............................... 67
6-14. Schematic Diagram
– MD MOTOR/SENSOR Section – ............................... 69
6-15. Printed Wiring Board
– MICROCOMPUTER Section – ................................... 71
6-16. Schematic Diagram
– MICROCOMPUTER Section – ................................... 73
6-17. Printed Wiring Boards – RELAY Section – .................. 75
6-18. Schematic Diagram – RELAY Section – ...................... 77
6-19. Printed Wiring Board – MAIN Section – ...................... 79
6-20. Schematic Diagram – MAIN Section – ......................... 81
6-21. Printed Wiring Boards – CD JOG/SW Section – .......... 83
6-22. Schematic Diagram – CD JOG/SW Section – .............. 85
6-23. Printed Wiring Board – CD DISPLAY Section – ......... 87
6-24. Schematic Diagram – CD DISPLAY Section – ............ 89
6-25. Printed Wiring Boards – MD JOG/SW Section – ......... 91
6-26. Schematic Diagram – MD JOG/SW Section – ............. 93
6-27. Printed Wiring Board – MD DISPLAY Section – ........ 95
6-28. Schematic Diagram – MD DISPLAY Section – ........... 97
6-29. IC Pin Function Description ......................................... 105
6-18. Schematic Diagram – RELAY Section – ...................... 77
6-19. Printed Wiring Board – MAIN Section – ...................... 79
6-20. Schematic Diagram – MAIN Section – ......................... 81
6-21. Printed Wiring Boards – CD JOG/SW Section – .......... 83
6-22. Schematic Diagram – CD JOG/SW Section – .............. 85
6-23. Printed Wiring Board – CD DISPLAY Section – ......... 87
6-24. Schematic Diagram – CD DISPLAY Section – ............ 89
6-25. Printed Wiring Boards – MD JOG/SW Section – ......... 91
6-26. Schematic Diagram – MD JOG/SW Section – ............. 93
6-27. Printed Wiring Board – MD DISPLAY Section – ........ 95
6-28. Schematic Diagram – MD DISPLAY Section – ........... 97
6-29. IC Pin Function Description ......................................... 105
7.
EXPLODED VIEWS
.............................................. 116
8.
ELECTRICAL PARTS LIST
............................. 125
– 6 –
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electro-
static 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.
static 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
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
check that the S curve waveforms is output three times.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• 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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
exceeding the limit for Class 1.
The following caution label is located inside the unit.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY A
!
MARK ON THE SCHEMATIC
DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE
CRITICAL TO SAFE OPERATION. REPLACE THESE COMPO-
NENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
CRITICAL TO SAFE OPERATION. REPLACE THESE COMPO-
NENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
– 7 –
POWER SUPPLY DURING SERVICING
• As this set has not own power supply, it does not operate inde-
pendently. Therefore, during servicing, connect it to the Pre-
Main amplifier and Tuner Unit (STR-MD777) of DHC-MD777.
Main amplifier and Tuner Unit (STR-MD777) of DHC-MD777.
If STR-MD777 are not available, use the Power Feed Jig (PFJ-
1) and Relay Connector Jig.
In this case, after turn on the POWER switch on the Power Feed
Jig, supply power with the following methods.
1) and Relay Connector Jig.
In this case, after turn on the POWER switch on the Power Feed
Jig, supply power with the following methods.
– CD Section –
Press the
[REPEAT]
and
[1/ALL]
buttons simultaneously.
(Power is turned off, when press the
[CLEAR]
and
[1/ALL]
button simultaneously)
– MD Section –
Insert the disc in the any MD disc slot.
Note:
Enter the test mode, when Insert the disc while pressing
the both
[ENTER/YES]
and
π buttons
(or
[ENTER/YES]
button only).
Connection:
Set
SYSTEM CONTROL terminal
SYSTEM CONTROL terminal
Connector cable (15P)
Pre-Main AMP
and Tuner Unit
and Tuner Unit
AC IN
Relay connector jig
(J-2501-166-A)
(J-2501-166-A)
FH-E939,838,737
MHC-6600,5600,
3600,2600
CDP/TC
MHC-6600,5600,
3600,2600
CDP/TC
CN103
CN201 (15P)
SYSTEM CONTROL terminal
SYSTEM CONTROL terminal
Set
Connector cable
CN102
FH-E828
FH-E929
FH-E929
MHC-2300
MHC-3500
MHC-5500
MHC-3500
MHC-5500
ST
Power feed jig
(PFJ-1)
(PFJ-1)
17P
15P
