DOWNLOAD Sony HCD-GNZ77D / HCD-GNZ88D / MHC-GNZ77D / MHC-GNZ88D Service Manual ↓ Size: 10.98 MB | Pages: 116 in PDF or view online for FREE

Model
HCD-GNZ77D HCD-GNZ88D MHC-GNZ77D MHC-GNZ88D
Pages
116
Size
10.98 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gnz77d-hcd-gnz88d-mhc-gnz77d-mhc-gnz88d.pdf
Date

Sony HCD-GNZ77D / HCD-GNZ88D / MHC-GNZ77D / MHC-GNZ88D Service Manual ▷ View online

21
HCD-GNZ77D/GNZ88D
• TEST DISC LIST
Be sure to use the DVD disc that matches the signal standards of
your region.
• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)
• DVD SL (Single Layer)
NTSC : HLX-503 (Part No.: J-6090-069-A)
HLX-504 (Part No.: J-6090-088-A)
PAL
: HLX-506 (Part No.: J-6090-077-A)
• DVD DL (Dual Layer)
NTSC : HLX-501 (Part No.: J-6090-071-A)
HLX-505 (Part No.: J-6090-089-A)
PAL
: HLX-507 (Part No.: J-6090-078-A)
• Procedure to enter to DVD Service Mode:
1. Press  
?
/
1
  button to turn on the system.
2. Select DVD function.
3. Press  
x
  button and [OPEN/CLOSE] button simultaneously and
then turn the [VOLUME] knob clockwise.
4. The message “SERVICE IN” appears on the fluorescent
indicator tube and the Top Menu of Remocon Diagnosis Menu
appears on the on-screen display on the TV. The model name
and revision number is displayed at the bottom of the on-screen
display.
3. Select “6. Iop:” by pressing [6] button on the remote commander.
4. Wait until a hexadecimal number appears in the on-screen
display as below:
Remocon Diagnosis Menu
0. External Chip Check
1. Servo Parameter Check
2. Drive Manual Operation
3. Emergency History
4. Version Information
Model Name : GML6DS_ME
IF-con
: V
Syscon
: Ver.
er.  01.00 (0000)
0.302
5. To execute each function, press its number by using numeric
button on the remote commander.
6. To release from this mode, press  
?
/
1
    button to turn off the
system.
• Execute IOP Measurement
In order to execute IOP measurement, the following standard
procedures must be followed.
1. From the Top Menu of Remocon Diagnosis Menu, select “2.
Drive Manual Operation” by pressing the [2]  button on the
remote commander. The following screen appears on the on-
screen display.
Drive Manual Operation
1. Servo Control
2. Track/Layer Jump
3. Manual Adjustment
4. Mecha test Mode
5. MIRR time Adjust
0. Return to Top Menu
2. Select “3. Manual Adjustment” by pressing the [3] button on
the remote commander. The following screen appears on the
on-screen display.
Manual Adjust
1.  Track Balance Adjust:
2.  Track Gain Adjust:
3. Focus Balance Adjust:
4. Focus Gain Adjust:
5. Eg Boost Adjust:
6. Iop:
7.  TRV. Level:
8. S curve(FE) Level:
9. RFL(PI) Level:
0. MIRR Time:
O
  o    Change Value
RETURN Return to previous menu
Manual Adjust
1.  Track Balance Adjust:
2.  Track Gain Adjust:
3. Focus Balance Adjust:
4. Focus Gain Adjust:
5. Eg Boost Adjust:
6. Iop. ED:
7.  TRV. Level:
8. S curve(FE) Level:
9. RFL(PI) Level:
0. MIRR Time:
O
  o    Change Value
RETURN Return to previous menu
5. Convert data from hexadecimal to decimal by using conversion
table.
6. Please find the label on the rear of the BU (Base Unit).
The default IOP value is written in the label.
7. Subtract between these two values.
8. If the remainder is smaller than 93 (decimal), then it is OK.
However if the value is higher than 93, then the BU is defective
and need to be change.
9. Press [RETURN] button on the remote commander to return to
previous menu.
10. Press [0] button on the remote commander to return to the Top
Menu of Remocon Diagnosis Menu.
11. Press  
?
/
1
  button to turn off the system.
• Check Emergency History
To  check the emergency history, please follow the following
procedure.
1. From the Top Menu of Remocon Diagnosis Menu, select “3.
Emergency History” by pressing the [3] button on the remote
commander. The following screen appears on the on-screen
display.
Ver. 1.3
22
HCD-GNZ77D/GNZ88D
2. You can check the total time when the laser is turned on during
playback of DVD and CD from the above menu. The maximum
time, which can be displayed are 999h 59min.
3. You can check the error code of latest 10 emergency history
from the above menu. To view the previous or next page of
emergency history, press  
.
    or   
>
    on the remote
commander. The error code consists of
• Error Code
Example of Error code
1.  01  05  04  04
00  92  46  00
00  00  00  00
00  00  23  45
The meaning of error code is as below:
01: Communication error (No reply from syscon)
02: Syscon hung up
03: Power OFF request when syscon hung up
19: Thermal shutdown
24: MoveSledHome error
25: Mechanical move error (5 Changer)
26: Mechanical move stack error
30: DC motor adjustment error
31: DPD offset adjustment error
32: TE balance adjustment error
33: TE sensor adjustment error
34: TE loop gain adjustment error
35: FE loop gain adjustment error
36: Bad jitter after adjustment
40: Focus NG
42: Focus layer jump NG
52: Open kick spindle error
51: Spindle stop error
60: Focus on error
61: Seek fail error
62: Read Q data/ID error
70: Lead in data read fail
71: TOC read time out (CD)
80: Can’t buffering
81: Unknown media type
• Parameter of error code
This is the detail of error code.
Example of Error code
1.  01  05  04  04
00  92  46  00
00  00  00  00
00  00  23  45
• Time of error code
This is the laser time when an error occurred.
Example of Error code
1.  01  05  04  04
00  92  46  00
00  00  00  00
00  00  23  45
To clear the Laser Hour
Press [DISPLAY] button and then press [CLEAR] button. The data
for both CD and DVD data are reset.
Emg.History Check
1.  01  05  04  04
Laser Hours
CD
0h
0min
DVD
0h
0min
00  92  46  00
00  00  00  00
00  00  23  45
2.  02  02  01  01
00  A9  4B  00
00  00  00  00
00  00  23  45
 
Next   Next Page    Prev  Prev Page
O  Return to Top Menu
To clear the Emergency History
Press [TOP MENU] button and then press [CLEAR] button. The error
code for all emergency history would be reset.
Emg.History Check
1.  00  00  00  00
Laser Hours
CD
999h
59min
DVD
999h
59min
00  00  00  00
00  00  00  00
00  00  00  00
2.  00  00  00  00
00  00  00  00
00  00  00  00
00  00  00  00
 
Next   Next Page    Prev  Prev Page
O  Return to Top Menu
Ver. 1.3
Emg.History Check
1.  01  05  04  04
Laser Hours
CD
999h
59min
DVD
999h
59min
00  92  46  00
00  00  00  00
00  00  23  45
2.  02  02  01  01
00  A9  4B  00
00  00  00  00
00  00  23  45
 
Next   Next Page    Prev  Prev Page
O  Return to Top Menu
To clear the Initialize Setup Data
Press [MENU] button and then press [CLEAR] button on the remote
commander.
Emg.History Check
Initialize setup data...
Laser Hours
CD
999h
59min
DVD
999h
59min
 
Next   Next Page    Prev  Prev Page
O  Return to Top Menu
23
HCD-GNZ77D/GNZ88D
To return to the Top Menu of Remocon Diagnosis Menu
Press [0] button on the remote commander.
• Check Version Information
To check the version information, please follow the following
procedure.
1. From the Top Menu of Remocon Diagnosis Menu, select “4.
Version Information” by pressing the [4] button on the remote
commander. The following screen appears on the on-screen
display.
To return to the Top Menu of Remocon Diagnosis Menu, press
[0] on the remote commander.
Version information
 
O  Return to Top Menu
Firm (Main) :  Ver. xxxxx
Firm (Sub) :  xxxxx
RISC :   xxxxx
8032 :   xxxxx
Audio DSP :  xxxxx
Servo DSP :  xxxxx
SECTION 4
MECHANICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Ver. 1.3
24
HCD-GNZ77D/GNZ88D
SECTION 5
ELECTRICAL ADJUSTMENTS
VIDEO  SECTION
Video Level Check (VIDEO BOARD)
Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Procedure:
1. Connect oscilloscope to VIDEO output.
2. Load a DVD reference disc playback.
3. Check the video signal level is 1.00±0.07Vp-p.
DVD SECTION
When the optical pick-up assy is replaced, perform the “Execute
IOP Measurement”.
Execute IOP Measurement (See page 21)
[TEST DISC LIST]
Be sure to use the DVD disc that matches the signal standards of
your region.
• CD
YEDS-18 (Part No.: 3-702-101-01)
PATD-012 (Part No.: 4-225-203-01)
• DVD SL (Single Layer)
    NTSC : HLX-503 (Part No.: J-6090-069-A)
HLX-504 (Part No.: J-6090-088-A)
    PAL
: HLX-506 (Part No.: J-6090-077-A)
• DVD DL (Dual Layer)
    NTSC : HLX-501 (Part No.: J-6090-071-A)
HLX-505 (Part No.: J-6090-089-A)
    PAL
: HLX-507 (Part No.: J-6090-078-A)
[RFMON Level Check]
Connection:
Procedure:
1. Connect an oscilloscope to CN105 pin 6  (RFMON) and
CN105 pin 3 (GND) on the DMB15 board.
2. Turn the power on.
3. Set the test disc (refer to the TEST DISC LIST) on the tray
and press  H  button to playback.
4. Confirm that oscilloscope waveform is clear and check
RFMON signal level is correct or not.
Note:
A clear RFMON signal waveform means that the shape “
◊” can be
clearly distinguished at the center of the waveform.
Checking Location: DMB15 board (Side A)
+
CN105 pin 
6
 (RFMON)
CN105 pin 
3
 (GND)
oscilloscope 
DMB15 board
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
RFMON signal waveform
level: 0.58 
±
 1.23 Vp-p (DVD)
          0.57 
±
 1.1 Vp-p (CD)
IC102
IC101
IC104
IC201
CN105
CN106
CN105 pin 
3
 (GND)
CN105 pin 
6
 (RFMON)
1
6
DMB15 BOARD (SIDE A)
oscilloscope
set
J1902
VIDEO OUTPUT
75 
1.00 
±
 0.07 Vp-p
(WHITE 100%)
Ver. 1.3
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