DOWNLOAD Sony DAV-EA20 / HCD-EA20 Service Manual ↓ Size: 9.72 MB | Pages: 101 in PDF or view online for FREE

25

On the Test Mode Menu screen, selecting 

[3]

 executes the aging of

the mechanism deck.

### Aging Test MENU ###

**

 Pls use over 40min. CD 

**

Operation Menu

1. Open/Close Test

Exit: RETURN

1)

On the Aging Test MENU screen, press the 

[1]

  key  on the

remote commander to display the Open/Close Test screen.

2)

Insert discs and press the 

[ENTER]

  key on the remote

commander.

3)

Is starts the aging.
During aging, the disc number, operating status and repeat cycle
are displayed. Aging can be aborted at any time by pressing
the

[RETURN]

key. After the operation is stopped, press the

[RETURN]

 key to return to the Aging Test MENU.

On the Test Mode Menu screen, selecting 

[4]

  displays the

information such as servo emergency history.
The history information from last 1 up to 10 can be scrolled with
the O key or o key. Also, specific information can be displayed
by directly entering that number with ten keys.

### EMG. History ###

  Laser Hours

CD

xxxxhxxm

DVD xxxxhxxm

a.

bb xx xx xx  xx xx xx xx

xx xx xx xx  xx xx xx xx

a.

bb xx xx xx  xx xx xx xx

xx xx xx xx  xx xx xx xx

   Select:1-9

Scroll:UP/DOWN

  (1.Latest EMG.)

Exit: RETURN

xxxxhxxm : The laser on total hours. Data below minutes are

omitted.

a.

: Error number.

bb

: Error code.

xx

: Not used.

• Clearing History Information

Press the 

[DVD DISPLAY]

 and 

[CLEAR]

 keys in this order.

Then both CD and DVD data are cleared.

Press the 

[DVD TOP MENU]

 and 

[CLEAR]

 keys in this order.

Press 

[DVD MENU]

 and 

[CLEAR]

 keys in this order.

The data have been initialized when “EEPROM Initialize
Finished.”.  message is displayed. The EMG. History screen
will be restored soon.

• Code list of Emergency History

10: Communication to RF AMP (IC001) failed.
11: Each servo for focus, tracking, and spindle is unlocked.
12: Check sum error of EEPROM (IC204).
14: Communication to servo DSP (IC509) failed, or servo DSP

(IC509) is faulty.

15: Communication to DVD decoder (IC701) failed, or DVD

decoder (IC701) is faulty.

16: Communication to DSD decoder failed, or DSD decoder is

faulty. (Not used)

20: Initialization of sled servo failed. It is not placed in the ini-

tial position.

23: Sled servo operation error.
24: Made a request to move the sled servo to wrong position.
30: Tracking balance adjustment error.
31: Tracking gain adjustment error.
33: Focus bias adjustment error.
34: Focus gain adjustment error.
35: Equalizer adjustment error.
40: Focus servo does not operate.
41: With a DVD dual layer disc, focus jump failed.
50: CLV (spindle) servo does not operate.
51: Spindle does not stop.
60: Made a request to seek nonexistent address.
61: Seek error of retry more than regulated times.
70: Control data could not be read.
80: Disc reading failed.

On the Test Mode Menu screen, selecting 

[5]

 displays the information

of mechanism deck error history.
The history information from last 1 up to 8 can be scrolled with the

O key or o key.

### Mecha Error History ###

  1. aa bb cc xx xx xx xx xx

  2. aa bb cc xx xx xx xx xx

  3. aa bb cc xx xx xx xx xx

  4. aa bb cc xx xx xx xx xx

  5. aa bb cc xx xx xx xx xx

  6. aa bb cc xx xx xx xx xx

  7. aa bb cc xx xx xx xx xx

  8. aa bb cc xx xx xx xx xx

Scroll:UP/DOWN

(1.Latest Err.)

Exit: RETURN

aa: Initialization is completed or not.

FF

: Complete.

other number : Not complete.

bb: Operating status of mechanism deck at an error occurred.

(lod sq jcp)
00

: Initializing.

10 to 15 : Open operating.
16 to 19 : Kicking cause open failed.
1A to 1F : Open operating.
20 to 27 : Complete the open operation.
28

: No disc and complete the open operation.

29 to 2F : Complete the open operation.
30 to 3F : Close requesting.
40 to 4F : Open requesting.
50 to 5F : Close operating.
60 to 6F : Complete the chucking operation.
80 to 8F : Complete the release operation.

  (BU is home position)

26

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

Do not use exiting test disc for DVD.

After parts related to the servo circuit (RF amplifier (IC001), DSP
(IC509), motor driver (IC501), EEPROM (IC903) so on) are
replaced, re-adjusting the servo circuit is necessary. Select “ALL”
at  “1. DRIVE AUTO ADJUSTMENT” (Refer to page 28 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).

Perform a RFMON level check before exchanging optical pick-up.

Measurement Point: DMB03 board CN501

13pin (RFMON) — 29pin (AGND)

90 to 9F : BU down operating.
A0 to AF : Opening/closing the shutter. Or stationary state in

   open/close the shutter is enablement.

B0 to BF : BU up requesting.
C0 to CF : BU down requesting.
D0 to DF : BU upping.
E0 to EF : No disc checking in disc loading.

cc: Operating status of mechanism deck at an error occurred.

(lod oq jcp)
00

: Complete the operation.

10 to 1F : Open operating.
20 to 2F : Close operating.
30 to 3F : Release operating.
60 to 6F : Chucking operating.
70 to 7F : Kicking operating.
80 to 8F : Returning the BU to home position. (after kicking)

On the Test Mode Menu screen, selecting 

[6]

 displays the ROM

version and region code.
The parenthesized hexadecimal number in version field is checksum
value of ROM.

## Version Information ##

 IF con.

Ver.x. xx

 SYScon.

Ver.x. xx  (xxxx)

Model

DAV-EA20

Region

0x

Config

xxxxxxxx

 Front End Ver.x.xx

Exit: RETURN

IF con.

: The version of system controller (IC501).

SYScon. : The version of DVD system processor (IC207).
Front End: The version of mechanism controller (IC901).

On the Test Mode Menu screen, selecting 

[7]

 displays color bars

for video level adjustment. During display of color bars, OSD
disappears but the menu screen will be restored if pressing the

[RETURN]

 key.

       RFMON signal waveform

• Standard value

DVD

TDV-520CSO

1.09 

±

 0.2Vp-p

(J-2501-236-A)

CD

LUV-P01

1.05 

±

 0.2Vp-p

(4-999-032-01)

VOLT/DIV: 200 mV
TIME/DIV: 500 ns 

RFMON level

27

MS-128 board

RF board

PANEL board

I/O board

AMP board

DMB03 board

UCOM board

SUB TRANSFORMER board

STANDBY board

28

C E

B

These are omitted

Q

C

E

B

These are omitted

Note:
• All capacitors are in µF unless otherwise noted.  pF: µµF

50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in 

Ω

 and 

1

/

4

 

W or less unless otherwise

specified.

•

f

: internal component.

•

C

: panel designation.

• X

: parts extracted from the component side.

•

a

: Through hole.

• b

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

•

A

: B+ Line.

•

B

: B– Line.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

• Voltages and waveforms are dc with respect to ground in

service mode.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : STOP

• Circled numbers refer to waveforms.

• Signal path.

F

: AUDIO

J

: CD PLAY

c

: DVD PLAY

d

: TUNER

L

: VIDEO

a

: CHROMA

E

: Y

e

: AUX IN

• Abbreviation

RU

: Russian model

Caution:
Pattern face side:

Parts on the pattern face side seen from

(SIDE A)

the pattern face are indicated.

Parts face side:

Parts on the parts face side seen from

(SIDE B)

the parts face are indicated.

Note: The components identified by mark 

0

 or dotted line

with mark 

0

 are critical for safety.

Replace only with part number specified.