DOWNLOAD Sony HCD-WZ8D / MHC-WZ8D Service Manual ↓ Size: 10.95 MB | Pages: 93 in PDF or view online for FREE

13

3

wire (flat type) 

     24p (CN001)

2

flexible board

    (CN003)

5

three step screws (M)

8

pick-up unit (TDP022W)

1

claw

6

holder (DBU1)

7

three insulators

4

RF board

14

• The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning the
set to the customer.

Procedure:
1. Press three buttons  x  ,   EQ EDIT  and  ?/1   simultaneously.
2. The liquid crystal display does not display any message and the

set is reset.

• This mode is used to select the function of MD or VIDEO.
Procedure:
1. Press the  ?/1  button to turn the set on.
2. Press the  MD(VIDEO)  and    ?/1   buttons simultaneously.
3. The function will change from MD to VIDEO, and "VIDEO" is

displayed.

4. To change change back to MD , repeat the same procedure.

• Either the 9 kHz step or 10 kHz step can be selected for the AM

channel step.

Procedure:
1. Set the function to AM.
2. Turn off the main power.
3. While depressing the  x   button, press the  ?/1   button to turn

on the main power.

4. “AM 9k Step” or “AM 10k Step” is displayed and the channel

step is changed over.

* For E model only

• This mode moves the optical pick-up to the position durable to

vibration. Use this mode when returning the set to the customer
after repair.

Procedure:
1. Press the  ?/1  button to turn the set on.
2. Set the function to DVD.
3. Press the  x    button and the  M    (Control lever) button

simultaneously.

4. After the "STANDBY" display blinks six times, the message

"LOCK" is displayed on the liquid crystal display, and the DVD
ship mode is set.

• This mode is used to perform the DVD Ship Mode with Cold

Reset.

Procedure:
1. Press the  ?/1  button to turn the set on.
2. Set the function to DVD.
3. Press three buttons  x    ,    z  START  (REC PAUSE) and

.m –  simultaneously.

4. After the "STANDBY" display blinks six times, the message

"LOCK" is displayed on the liquid crystal display, and the DVD
ship mode is set.

* Color system can be changed to PAL or NTSC.
Procedure:
1. Turn off the main power.
2. Press two buttons  X  and  ?/1  simultaneously.

“COLOR PAL” is displayed and the color system is changed to
PAL. The set is powered on and the function is set to DVD.

3. To change the color system to NTSC, turn off the main power.
4. Press two buttons  X  and  ?/1  simultaneously.

“COLOR NTSC” is displayed and the color system is changed
to NTSC. The set is powered on and the function is set to DVD.

• The disc tray lock function for the antitheft of an demonstration

disc in the store is equipped.

Setting Procedure :
1. Press the  ?/1  button to turn the set on.
2. Set the function to DVD.
3. Press two buttons of   x  and   Z   simultaneously for five seconds.
4. The message “LOCKED” is displayed and the tray is locked.
Releasing Procedure :
1. Press two buttons of   x  and   Z  simultaneously for five seconds

again.

2. The message “UNLOCKED” is displayed and the tray is

unlocked.

Note :When “LOCKED” is displayed, the tray lock is not released

by turning power on/off with the  ?/1  button.

* This mode is used to check operations of the amplifier and tape

deck.

Procedure:
1. Press the  ?/1  button to turn the set on.
2. Press three buttons  x  ,  z START  (REC PAUSE) and  MUSIC

MODE  simultaneously.

3. “MD” is displayed and dotted lines blink.
4. Every pressing the  EQ EDIT  button changes the displays in

the order of “GEQ MIN” 

→ “GEQ FLAT” → “GEQ MAX”

5. When the  VOLUME  control knob is turned clockwise even

slightly, the sound volume increases to its maximum and the
message “VOLUME MAX” appears for two seconds, the display
returns to the original display.

6. When the  VOLUME  control knob is turned counterclockwise

even slightly, the sound volume decreases to its minimum and
the message “VOLUME MIN” appears for two seconds, the
display returns to the original display.

7. When a tape is inserted in Deck B and by pressing the  z START

(REC PAUSE) button recording is started, the input source
function selects MD automatically.

8. During the recording by pressing the  .m –  button, the

TAPE A/B is selected and tape is rewound. Tape stops at around
the record-starting position and playback of the recorded portion
of the tape is started.

9. Press the  ?/1  button to turn the set off.

• This mode is used to check the software version, key board, VACS

level, liquid crystal display and LEDs.

Procedure:
1. Press three buttons  x      ,    z  START  (REC PAUSE) and

TUNER/BAND  simultaneously.

2. Segments of the liquid crystal display and LEDs are all turned

on.

3. To enter the software version display mode, press the  .m –

button. The model name and destination are displayed.

4. Each time the  .m –  button is pressed, the display changes

in the following order. MC, GC, CD, CDD, CDMA, CDMB,
BDA, BDB, ST, TA, TM, TC and MD. Each time the  + M >
button is pressed, the contents of the version display change.

5. Press the  hH  button, and the key check mode is activated.
6. In the key check mode, "K 0 V 0" is displayed. Each time a

button is pressed, "K 0" value increases. However, once a button
is pressed, it is no longer taken into account. "V 0" value
increases like 1, 2, 3 ... if rotaing the  VOLUME  knob clockwise,
or it decreases like 0, 9, 8 ... if rotating couterclockwise.

7. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

15

The Test Mode allows you to make diagnosis and adjustment easily
using the remote commander and monitor TV. The instructions,
diagnostic results, etc. are given on the on-screen display (OSD).

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-WZ8D_6D xx

Revision :x.xx

4.

To execute each function, select the desired menu and press its
number on the remote commander [COMMAND MODE]
(RM-SWZ8D).

5.

To release from test mode, press the  

+/1

  button and turn the

power off.

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 judgment
through a visual check to the result, the following screen is displayed
for the key entry.

• VACS Level Display Mode
Procedure:
1. Press three buttons  x      ,    z  START  (REC PAUSE) and

TUNER/BAND  simultaneously.

2. Press the  X  button. The VACS level "VACS 0+0" is displayed.
3. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

• Display Check
Procedure:
1. Press three buttons  x   ,  z  START  (REC PAUSE) and

TUNER/BAND  simultaneously.

2. Press the  x  button and the display changes. Each time the  x

button is pressed, the pattern of segments changes.

3. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

• This mode is used to switch on and off the VACS (Variable

Attenuation Control System).

Procedure:
1. Press the  ?/1  button to turn the set on.
2. To enter the test mode, press three buttons  x  ,  z  START

(REC PAUSE) and  MOVIE MODE  simultaneously.

3. The message "VACS OFF" or "VACS ON" appears.

Use the following test disc on test mode.
TDV-520CSO (DVD-SL): PART No. J-2501-236-A
LUV-P01 (CD):

PART No. 4-999-032-01

TDV-540C (DVD-DL):

PART No. J-2501-235-A

Note: Do not use exiting test disc for DVD.

16

• 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 displayed.
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.

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 below.

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

0-2-2. 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-WZ8D)

>

.

>

.

0-2-5. Region

Model destination code is displayed. (2 digits number)

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.

Pull up/down setting check of the DVD system processor (IC207)
pin 150, 151 and 154 (for clock setting port).

SD bus data check between DVD decoder (IC701) and D-RAM
(IC706).

Output the color bars for video level adjustment.

On the Test Mode Menu screen, press the 

[1]

 key on the remote

commander, and the Adjustment Menu will be displayed.

## 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 adjusted
for the case where adjustment is suspended due to an error. In this
mode, the adjustment can be made easily through the operation
following the message displayed on the screen.
The disc used for adjustment must be the one specified for
adjustment.

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 adjustment
by pressing the 

[RETURN]

 button on the remote commander.

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.