HCD-GN77D - Sony Audio Service Manual (repair manual)

hcd-gn77d service manual
Model
HCD-GN77D
Pages
8
Size
127.85 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / SUPPLEMENT-1
File
hcd-gn77d.pdf
Date

Read Sony HCD-GN77D Service Manual online

HCD-GN77D
SUPPLEMENT-1
File this supplement with the service manual.
Subject: DVD OSD Test Mode
Ver 1.1  2003.08
E Model
9-877-454-81
SERVICE MANUAL
2
HCD-GN77D
[GENERAL  DESCRIPTION]
The Test Mode allows you to make diagnosis and adjustment eas-
ily using the remote commander and monitor TV. The instructions,
diagnostic results, etc. are given on the on-screen display (OSD).
[STARTING  TEST  MODE]
1.
Press the  
+/1
  button to turn the power on, and set the function
to DVD.
2.
While pressing the
x
and  
Z
  button, turn the 
[VOLUME]
knob clockwise to enter the test mode.
3.
It displays “SERVICE IN” on the liquid crystal display, and
displays the Test Mode Menu on the monitor screen as follows.
(At the bottom of the menu screen, the model name and revision
number are displayed)
Test Mode Menu
0. Syscon Diagnosis
1. Drive Auto Adjustment
2. Drive Manual Operation
3. Mecha Aging
4. Emergency History
5. Mecha Error History
6. Version Information
7. Video Level Adjustment
Exit: POWER Key
Model    :MHC-GN77D xx
Revision :x.xx
4.
To execute each function, select the desired menu and press its
number on the remote commander RM-SR246D.
5.
To release from test mode, press the  
+/1
  button and turn the
power off.
[OPERATING  TEST  MODE]
0.
SYSCON  DIAGNOSIS
The same contents as board detail check by serial interface can be
checked from the remote commander operation.
On the Test Mode Menu screen, press 
[10/0]
 key on the remote
commander, and the following Check Menu will be displayed.
### Syscon Diagnosis ###
Check Menu
0. Quit
1. All
2. Version
3. EEPROM
4. GPIO
5. SD Bus
6. Video
0-0.  Quit
Quit the Syscon Diagnosis and return to the Test Mode Menu.
0-1.  All (All items continuous check)
This menu checks all diagnostic items continuously. Normally, all
items are checked successively one after another automatically
unless an error is found, but at a certain item that requires judg-
ment through a visual check to the result, the following screen is
displayed for the key entry.
DVD OSD Test Mode
• Example display
### Syscon Diagnosis ###
Diag All Check
No.2 Version
2-3. ROM Check Sum
Check Sum = xxxx
Press NEXT Key to Continue
Press PREV Key to Repeat
For the ROM Check, the check sum calculated by the Syscon is
output, and therefore you must compare it with the specified value
for confirmation.
Following the message, press the 
[NEXT        ]
 button to go to the
next item, or press the 
[        PREV]
 button to repeat the same
operation again.
To quit the diagnosis and return to Check Menu screen, press the
[RETURN]
 key on the remote commander to display Check Menu.
• Error occurred
If an error occurred, the diagnosis is suspended and error is dis-
played.
Press the 
[RETURN]
 key on the remote commander to quit the
diagnosis, or press the 
[         PREV]
 button to repeat the same
check where an error occurred, or press the 
[NEXT        ]
 button to
continue the check from the item next to faulty item.
General Description of Checking Method
Selecting 2 and subsequent items calls the submenu screen of each
item. And selecting 2 and subsequent items executes respective
menus and outputs the results.
For the contents of each submenu, see “Check Items List” as be-
low.
Check Items List:
0-2. Version
0-2-1. All
0-2-2. Revision
0-2-3. ROM Check Sum
0-2-4. Model Type
0-2-5. Region
0-3. EEPROM Check
0-3-1. Sampling Check
0-3-2. Detail Check
0-4. GP I/O Check
0-5. SD Bus Check
0-6. Video Check
0-2.  Version
0-2-2. Revision
The revision number of ROM (IC206) that the program for
the DVD system processor (IC207) is stored.
0-2-3. ROM Check Sum
Check sum is calculated.
(4 digits hexadecimal number)
0-2-4. Model Type
Model name is displayed. (MHC-GN77D)
>
.
>
.
3
HCD-GN77D
0-2-5. Region
Model destination code is displayed. (2 digits number)
0-3.  EEPROM Check
0-3-1. Sampling Check
EEPROM check at every 64 words.
It compares read data with write data of each address. When
there are discrepancies between two data, it displays error.
0-3-2. Detail Check
EEPROM check at every 1 word.
It compares read data with write data of each address. When
there are discrepancies between two data, it displays error.
0-4.  GP I/O Check
Pull up/down setting check of the DVD system processor (IC207)
pin 150, 151 and 154 (for clock setting port).
0-5.  SD Bus Check
SD bus data check between DVD decoder (IC701) and D-RAM
(IC706).
0-6.   Video Check
Output the color bars for video level adjustment.
1.
DRIVE  AUTO  ADJUSTMENT
On the Test Mode Menu screen, press the 
[1]
 key on the remote
commander, and the Adjustment Menu will be displayed.
 •Use DVD reference disc unless othermise indicated.
[DVD reference disc]
• LUV-P01 (4-999-032-01) (CD)
•TDV-540C (J-2501-235-A) (DVD-DL)
• TDV-520CSO (J-2501-236-A) (DVD-SL)
## Drive Auto Adjustment ##
Adjustment Menu
 0. ALL
 1. DVD-SL
 2. CD
 3. DVD-DL
Exit: RETURN
Normally, 
[10/0]
 is selected to adjust DVD (single layer), CD and
DVD (dual layer) in this order. But, individual items can be ad-
justed for the case where adjustment is suspended due to an error.
In this mode, the adjustment can be made easily through the op-
eration following the message displayed on the screen.
The disc used for adjustment must be the one specified for adjust-
ment.
1-0.  ALL
Press the 
[10/0]
 key on the remote commander, and the servo set
data in EEPROM will be initialized. Then, 1. DVD-SL disc, 2.
CD disc and 3. DVD-DL disc are adjusted in this order.
Each time one disc was adjusted, it is ejected. Replace it with the
specified disc following the message. You can finish the adjust-
ment by pressing the 
[RETURN]
 button on the remote commander.
Note: During adjustment of each disc, the measurement for disc type judg-
ment is made. As automatic adjustment does not judge the disc
type unlike conventional models, take care not to insert wrong type
discs. Also, do not give a shock during adjustment.
1-1.  DVD-SL (single layer)
Press the [1] key on the remote commander and insert a DVD
single layer disc following the message. Then the adjustment will
be made through the steps below, then adjusted values will be
written to the EEPROM.
DVD Single Layer Disc Adjustment Steps:
1.
Sled reset
2.
Disc check memory SL
3.
Wait 300 msec
4.
Set disc type SL
5.
LD on
6.
Spindle start
7.
Wait 1 sec
8.
Focus servo on 0
9.
Auto track offset adjust
10. CLVA on
11. Wait 500 msec
12. Tracking on
13. Wait 1 sec
14. Sled on
15. Check CLV on
16. Auto focus offset adjust
17. Auto focus gain adjust
18. Auto focus offset adjust
19. EQ boost adjust
20. Auto track gain adjust
21. All servo stop
22. EEP copy loop filter offset
1-2.  CD
Press the 
[2]
 key on the remote commander and insert a CD disc
following the message. Then the adjustment will be made through
the steps below, then adjusted values will be written to the
EEPROM.
CD Adjustment Steps
1.
Sled tilt rest
2.
Disc check memory CD
3.
Wait 500 msec
4.
Set disc type CD
5.
LD on
6.
Spindle start
7.
Wait 500 msec
8.
Focus servo on 0
9.
Auto track offset adjust
10. CLVA on
11. Wait 500 msec
12. Tracking on
13. (TC display start)
14. Wait 1 sec
15. Sled ON
16. Check CLV on
17. Auto focus offset adjust
18. Auto focus gain adjust
19. Auto focus offset adjust
20. EQ boost adjust
21. Auto track gain adjust
22. All servo stop
4
HCD-GN77D
1-3.  DVD-DL (dual layer)
Press the 
[3]
  key on the remote commander and insert a DVD
dual layer disc following the message. Then the adjustment will
be made through the steps below, then adjusted values will be
written to the EEPROM.
DVD Dual Layer Disc Adjustment Steps:
1.
Sled tilt reset
2.
Disc check memory DL
3.
Wait 500 msec
4.
Set disc type DL
5.
LD on
6.
Spindle start
7.
Wait 1 sec
Layer 1 Adjust
8.
Focus servo on 0
9.
Auto track offset adjust
10. CLVA on
11. Wait 500 msec
12. Tracking on
13. Wait 500 msec
14. Sled on
15. Check CLV lock
16. Auto loop filter offset adjust, Auto focus adjust
17. Auto focus gain adjust
18. Auto focus offset adjust
19. EQ boost adjust
20. Auto loop filter offset adjust
21. Auto Track Gain Adjust
Layer 0 Adjust
22. Focus jump (L1 
t L0)
23. Auto track offset adjust L0
24. CLVA on
25. Wait 500 msec
26. Tracking on
27. Wait 500 msec
28. Sled on
29. Check CLV lock
30. Auto Focus Adjust
31. Auto focus gain adjust
32. Auto focus offset adjust
33. EQ boost adjust
34. Auto track gain adjust
35. All servo stop
2.
DRIVE  MANUAL  OPERATION
Note: This mode is used for design, and not used in service fundamen-
tally.
On the Test Mode Menu screen, press the 
[2]
 key on the remote
commander, and the Operation Menu will be displayed. For the
manual operation, each servo on/off control and adjustment can
be executed manually.
## Drive Manual Operation ##
Operation Menu
 1. Disc Type
 2. Servo Control
 3. Track/Layer Jump
 4. Non EEPROM Write Adjust
 5. EEPROM Write Adjust
 6. Memory Check
 7. Disc Check Memory
 8. Error Rate Display
 9. SACD Water Mark
Exit: RETURN
>
.
In using the manual operation menu, take care of the following
points. These commands do not provide protection, thus requiring
correct operation. The sector address or time code field is dis-
played when a disc is loaded.
Note:
1. Set correctly the disc type to be used on the Disc Type screen.
2. In case of an alarm, immediately press the  
x
  button to stop the
servo operation, and press the  +/1  button to turn the power
off.
Basic operation:
(controllable from front panel or remote commander)
 +/1
: Power OFF (release the Test Mode)
 x
: Servo stop
 
Z
: Stop and eject/Loading
[RETURN]
: Return to Operation Menu or Test
Mode Menu
[       PREV]
[NEXT      ]
: Transition between sub modes of
menu
[1] to [9], [10/0]
: Selection of menu items
Cursor  o / O
: Increase/Decrease in manually ad-
justed value
2-1.  Disc Type
Disc Type
Disc Type Select
 1. Disc Type Auto Check
 2. Set Disc Type DVD
 3. Set Disc Type CD
 4. Set Disc Type Hybrid
Exit: RETURN
2-1-1.
Disc Type Auto Check
1)
Press the 
[1]
 key on the remote commander to display the Disc
Type Auto Check screen.
2)
Insert a disc and press the 
[ENTER]
  key on the remote
commander.
3)
It judges the type of inserted disc automatically and displays
the disc type and so on as below.
Disc Type Auto Check
 Disc Type
xx
 Layer
xx
 Mirr Time
xx
 Mirr Count
xx
 FZC Count
xx
 PI Reference xx
 PI Peak
xx
 ENTER.Execute
Exit: RETURN
Disc Type
: CD, DVD or Hybrid (SACD)
Layer
: SINGLE, DUAL or HYBRID
Mirr Time
: Mirror time of between disc surface and record sur-
face when disc type judgment. (hexadecimal num-
ber)
Page of 8
Display

Download Sony HCD-GN77D Service Manual (Repair Manual)

Here you can read online and download Sony HCD-GN77D Service Manual in PDF. HCD-GN77D service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony HCD-GN77D Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.