DOWNLOAD Sony DVP-CX850D (serv.man2) Service Manual ↓ Size: 34.68 MB | Pages: 127 in PDF or view online for FREE

— 5 —

• The two flat type wires that connect the TK-54 board with the MB-85 board are not equipped with the mis-insertion preventive measures.

If the two wires are incorrectly inserted each other by mistake, it can damage the MB-85 board as the secondary failure.

MB-85 board

Flat type wire
(18 core)
(from CN003 to CN004)

Flat type wire
(18 core)
(from CN002 to CN003)

Insulater side

Mechanism deck

CN003

CN004

TK-54 board

CN002

CN003

Insulater side

— 6 —

The test mode can check the following functions.

1.

Button function

2.

Remote commander signal reception function

3.

System controller ´ IF controller serial communication function

4.

Direct search dial function

5.

Click shuttle function

6.

FL display tube illumination check

Grid check
Anode check

7.

LED control function

8.

Key board control function

While pressing the [RETURN] and [STOP] or the [TIME/TEXT] and [EDIT] buttons of the DVP-CX850D at the same time in the standby
mode, press the [SET UP] button of the remote commander to enter the test mode.

When the DVP-CX850D enters the test mode, the automatic display sequence of the FL display tubes starts as follows.

1.

All segments of the LED and the FL display tube turn on for about five seconds.

 The [DIRECT SEARCH] LED and the [DISC CHANGE] LED turn on alternatingly while all FL display tubes turn on.

2.

Prototype model name is displayed.

As to the display indication of the FL display tubes, refer to “9. FLD AUTO TEST OPERATION”.

3.

Date of the last update of the program is displayed.

Example: 990604

4.

The message [GRID TEST] appears.  Then the odd number grids and the even number grids flash alternately.  (Three times)

5.

The message [ANODE TEST] appears.  Then the odd number anodes and the even number anodes flash alternately.  (Three times)

6.

Returns to step 1 “All segments of the LED and the FL display tube turn on for about five seconds.”

Steps 1 through 6 are repeated.

Press the [POWER] button of the DVP-CX850D and the remote commander.  The FL display tube turns off and the red POWER-LED only
turns on to return to the standby mode as long the serial communication between the system controller and the IF controller works correctly.
While pressing the [STOP] button, press the [POWER] button to return forcibly to the standby mode.

DVP-CX850D

200 DISK-DD

DPX-1181

— 7 —

Press any function button (except [POWER] of the DVP-CX850D in the test mode.  Then the machine exits the FL display tube automatic
display test mode.  As long the button is kept pressed, the FL display tube shows the function name of the pressed button.  When hand is
removed from the button, the message [NOTHING] appears.  For the function name of the buttons on the FL display tube, refer to the
following table.

When any of the self-illuminating buttons (the buttons equipped with LED), every pressing of the button toggles between turning on and off.
To test the MULTI CHANNEL LED (blue LED), press the [RETURN] button because the LED does not have its corresponding button.

The direction pointing buttons function to enter the special modes as shown below.

R: FL display tube grid check
r: LED check
T: Direct search dial check
t:FL display tube anode check

All buttons are judged by the input voltage value to the A/D port.  The reference voltage of the A/D port is EVER 5V.  The input voltage value
is calculated with 10-bit accuracy.  Only when the input voltage value agrees twice, the value is input to the A/D port in order to remove
chattering of buttons.
When the buttons of the IF controller are judged, the A/D port had a dead zone so that the message [IGNORE] appears when an input voltage
in the range of the dead zone is input.

When the machine receives the remote commander signal while [NOTHING] is displayed, the function name of the remote commander code
is displayed on the FL display tube.  The machine receives the DVD category code only.
The [DISPLAY] button of the remote commander functions to switch the display between the function name display and the code display.
When the code is displayed, the message [REM NO xx] appears.  The characters xx indicates the received code in the hexadecimal number.
When the remote commander signal is not received, the message [FF] appears.

↔

The bi-directional serial communication between the system controller and the IF controller is performed normally at the rate of 24 ms. This
mode can easily check if the communication is correctly performed or not.
When the non-relief type characters such as [VIDEO CD], [DVD] and [CD] in the left of the FL display tube turn off while [NOTHING] is
displayed, it indicates that the serial communication with the system controller is correctly performed.
When these non-relief type characters turn on, it indicates that the serial communication with the system controller is not performed.
However, during the period of several seconds (until initialization of the MB board is complete) after the test mode is activated, the non-relief
type characters can turn on.  This is normal.

This test checks that the IF controller can recognize the rotation of the click shuttle control.  When the illuminating segment moves as the
click shuttle is rotated during the subsequent grid check and the anode check, the click shuttle is normal.

The FL display tube can be simply checked by the automatic display mode, but can be checked more precisely by this mode.
All segments of the FL display tube are turned on when the [STOP] and [PLAY] buttons of the DVP-CX850D are pressed at the same time.

0

0.65

1.24

1.88

2.41

2.92

3.45

3.94

STOP

PAUSE

T

r

ENTER

R

t

JOG

POWER

PLAY

MEGA-CTRL

DISC/ACS

ACS ENTER

EASY PLAY

TITLE

DVD MENU

RETURN

DISPLAY

CLEAR

1/ALL DISCS

TIME/TEXT

LOAD

REPEAT

PROGRAM

SHUFFLE

SORT

FILE

EDIT

FOLDER A

FOLDER B

FOLDER C

FOLDER D

FOLDER ALL

FOLDER DVD

FOLDER CD

— 8 —

13G

(16G)

(15G~1G)

12G

11G

10G

9G

8G

S2

S2

S3

S1

S2

S1

S1

S2

S2

S4

S2

S3

S4

S2

S1

S5

S4

S1

S5

S1

S2

S2

S3

7G

16G

6G

5G

4G

3G

2G

1G

15G

14G

1-1 2-1 3-1 4-1 5-1

1-2 2-2 3-2 4-2 5-2

1-3 2-3 3-3 4-3 5-3

1-4 2-4 3-4 4-4 5-4

1-5 2-5 3-5 4-5 5-5

1-6 2-6 3-6 4-6 5-6

1-7 2-7 3-7 4-7 5-7

ANODE CONNECTION

Grid

Anode

P1

16G

15G

14G

13G~8G

7G

6G~5G

4G

3G~2G

1G

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P12

P13

P14

S1

S2

S3

S4

S5

(REPEAT)

P15

P16 

P17

P18
P19

P20

P21

P22

P23

P24

P25

P26

P27

P28

P29

P30

P31

P32

P33

P34

P35
P36

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

-

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

-

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7

-

1-1

2-1

3-1

4-1

5-1

1-2

2-2

3-2

4-2

5-2

1-3

2-3

3-3

4-3

5-3

1-4

2-4

3-4
4-4

5-4

1-5

2-5

3-5

4-5

5-5

1-6

2-6

3-6

4-6

5-6

1-7

2-7

3-7

4-7

5-7