DOWNLOAD Sony CMT-M90DVD / HCD-M90 Service Manual ↓ Size: 14.08 MB | Pages: 127 in PDF or view online for FREE

25

The following menus are normally not used.

The persons who do not know well about these menus should not
use them.

EEPROM Data1

            -– DL –-

 CD LCD

SL

L0

L1

Focus Gain

xx xx

xx

xx

xx

TRK. Gain

xx xx

xx

xx

xx

FCS Balance

xx xx

xx

xx

xx

Focus Bias

xx xx

xx

xx

xx

TRV. Offset

xx xx

xx

xx

xx

L. F. Offset

xx xx

xx

xx

xx

EQ Boost

xx xx

xx

xx

xx

Mirror Time

xx xx

xx

xx

xx

_DOWN: Next Data

CLEAR: Default Set     page.1/2

EEPROM Data1

            -– DL –-

 CD LCD

SL

L0

L1

RF Jitter

xx --

xx

xx

xx

RF Level

xx --

xx

--

--

FE Level

xx --

xx

--

--

FE Balance

xx --

xx

--

--

TRV. Level

xx --

xx

--

--

Analog FRSW

xx xx

xx

xx

xx

PLL DacGain

xx xx

xx

xx

xx

_

 UP  : Prev Data

CLEAR: Default Set     page.2/2

This screen displays current servo adjusted data stored in the
EEPROM. Though adjusted data can be initialized with the

[CLEAR]

 key on the remote commander, they cannot be restored

after initialization. So, before clearing, make a note of the adjusted
data. For reference, the drive has been designed so that the gain
center value is 20 and offset value is 80. Other values will be in a
range of 10 to 80. If extreme value such as 00 or FF is set, adjustment
will be faulty. In such a case, check for disc scratch or cable
disconnection, then perform adjustment again.

### EMG. History ###

Laser Hours

CD xxxxxxxh

DVD xxxxxxxh

1.

00 00 00 00 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

Select: 1 – 9 Scroll: UP/DOWN

(1: Last EMG.) Exit: RETURN

Press the  

[4]

 key on the remote commander of the emergency history

mode to display the servo error occurrence history. Press the  

M

or

m

keys on the remote commander to scroll the history data in the range
of the most recent error “1” to the error “10”. You can also type the

desired error number from the ten-keys on the remote commander.
The upper two columns show the accumulated turn-on hours of the
optical laser unit. The “minute” and the lower data are truncated.

Clearing the Error Histories

• Clearing the laser turn-on hours data

Press the 

[DVD DISPLAY]

 and 

[CLEAR]

 keys on the remote

commander in this order. Both of the CD laser data and DVD
laser data are cleared.

• Clearing the error occurrence history data

Press the 

[DVD TOP MENU]

 and 

[CLEAR]

 keys on the remote

commander in this order.

• Initializing the setups

Press the 

[DVD MENU]

  and 

[CLEAR]

  keys on the remote

commander in this order. When the message “Set Up Initialized”
is displayed, it indicates that the setups are initialized. The screen
returns to the EMG display screen soon.

How to Read the Eror Occurrence History Data

1

Emergency code No.

2

Not used (The codes that are used for debugging during program
design are displayed here. They are not related to the error occ
urrence history.)

3

Order of error occurrence (1 to 9)

Emergency Code Table

10.  Communication error with RF AMP (IC001) on the RF-240

board.

11.  Servo lock of focus, tracking and spindle servos are lost.
12.  Communication error with EEPROM (IC101) on the DVD

board.

13. Hours meter data write error in EEPROM (IC101) on the DVD

board.

14. Communication error with servo DSP (IC302) on the DVD

board or defective servo DSP

20. Tilt and sled servo initializing error. The laser unit does not

return to the initial position.

21. Tilt servo operation error.
22. The move request to illegal position is issued from system

control to the tilt servo.

23. Error in the tracking balance gain adjustment.
24. The move request to illegal position is issued from system

control to the sled servo.

30. Error in the tracking balance adjustment.
31. Error in the tracking gain adjustment.
32. Error in the focus balance adjustment.
33. Error in the focus bias adjustment.
34. Error in the focus gain adjustment.
35. Error in the tilt servo adjustment.
36. Error in the RF equalizer adjustment.
37. Error in the RF group delay adjustment
38. Amount of jitter upon completion of adaptation adjustment is

excessive.

40. Focus servo does not lock.
41. Focus jump is not possible with the dual layer (DL) disc.
50. CLV (spindle) servo does not lock.
51. Spindle does not stop.
60. The seek request to the non-existent address is issued from

system control using the DVD disc.

3

1

2

2

26

• This mode is used to unable to take  sample disc out of tray in

the shop.

Procedure:
1. Press the

I/1

key to turn the power ON.

2. Press the 

[FUNCTION]

 key to select “DVD”.

3. While pressing the

x

key, press the

Z

 DVD

key.

4. The message “LOCKED” is displayed on the liquid crystal

display and the tray is locked. (Even if pressing the

Z

 DVD

key,

the message “LOCKED” is displayed on the liquid crystal
display and  the tray is locked)

6. To release from this mode, while pressing the

x

key,  press

the

Z

 DVD

key again.

7. The message “UNLOCKED” is displayed on the liquid crystal

display and the tray is unlocked.

• The color system can be changed over NTSC or PAL.
Procedure:
1. Press the

I/1

key to turn the power ON.

2. Press the 

[FUNCTION]

 key to select “DVD”.

3. While pressing the

x

key, press the

I/1

key.

4. Press the

I/1

key to turn the power ON. The color system is

changed over.

• A step of AM channels can be changed over between 9 kHz and

10 kHz.

Procedure:
1. Press the

I/1

key to turn the power ON.

2. Press the 

[FUCTION]

  key to select “TUNER” and press the

[TUNER AM]

 key to turn the “AM”.

3. Press the

I/1

key to turn the set OFF.

4. While pressing 

[REPEAT/FM MODE]

 key, and press 

the I/1

key

and the display of  liquid crystal display changes to “AM 9K
Step” or “AM 10K Step”, and thus the channel step is changed
over.

27

RV501

Video Level

Adjustment

IC503

During diagnostic check, the characters and color bars can be seen
only with the NTSC monitor. Therefore, for diagnostic check, use
the monitor that supports both NTSC and PAL modes

1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,

with delay mode

3) DVD reference disc

HLX-501 (J-6090-071-A) (dual layer) (NTSC)
HLX-503 (J-6090-069-A) (single layer) (NTSC)
HLX-504 (J-6090-088-A) (single layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
HLX-506 (J-6090-077-A) (single layer) (PAL)
HLX-507 (J-6090-078-A) (dual layer) (PAL)

<Purpose>
This adjustment is made to satisfy the NTSC/PAL standard, and if
not adjusted correctly, the brightness will be too large or small.

Signal

Color bars

Test point

VIDEO OUT jack
(75 

Ω terminated)

Instrument

Oscilloscope

Adjusting element

RV501 (DVD board)

Specified Value

1.0

+ 0.04

 Vp-p

– 0.02

Procedure:
1. Press the

I/1

key to turn the power on, and turn the

[FUNCTION]

 key to select “DVD”.

2. Adjust the RV501 on the MB board to attain 1.0

+ 0.04

 Vp-p.

– 0.02

<Purpose>
Check S-terminal video output.  If it is incorrect, pictures will not
be displayed correctly in spite of connection to the TV with a S-
terminal cable.

Signal

Color bars

Test point

S VIDEO OUT (S-Y) jack
(75 

Ω terminated)

Instrument

Oscilloscope

Specified Value

1.0 

± 0.05 Vp-p

Procedure:
1. Press the

I/1

key to turn the power ON, and turn the

[FUNCTION]

 key to select “DVD”.

2. Confirm that the S-Y level is 1.0 

± 0.05 Vp-p.

<Purpose>
This checks whether the S-C satisfies the NTSC Standard.  If it is
not correct, the colors will be too dark or light.

Signal

Color bars

Test point

S VIDEO OUT (S-C) jack
(75 

Ω terminated)

Instrument

Oscilloscope

Specified Value

286 

± 30 mVp-p (NTSC)

300 

± 100 mVp-p (PAL)

Procedure:
1. Press the

I/1

key to turn the power ON, and turn the

[FUNCTION]

 key to select “DVD”.

2. Confirm that the S-C burst is 286 

± 30 mVp-p (NTSC) or 300

± 100 mVp-p (PAL).

1.0

+ 0.04

 Vp-p

– 0.02

1.0 

±

 0.05 Vp-p

286 

±

 50 mVp-p

(NTSC)
or
300 

±

 100 mVp-p

(PAL)

28

Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.

1. The adjustments should be performed with the rated power supply

voltage unless otherwise noted.

2. The adjustments should be performed in the order given in this service

manual.

3. The adjustments should be performed for both L-CH and R-CH.

Procedure:
1. Mode: REC

FUNCTION: MD

2. Mode: Playback

3. Confirm playback the signal recorded in step 1 become speci-

fied values as follows.
If these values are out of specification values, adjust the RV101
(L-CH) and RV201 (R-CH) on the TC board to repeat steps
1and 2.

Specified values: Playback output of 315 Hz to playback

output of 10 kHz: 

± 0.5 dB

Adjustment Location: TC board

attenuator

set

MAIN board 
AUDIO IN (MD/VIDEO) jack (SJ302)
L-CH, R-CH

1) 315 Hz
2) 10 kHz

50 mV (– 23.8 dB)







600 

Ω

blank tape
CN-123

AF OSC

+
–

set

recorded
portion

MAIN board
SPEAKER terminals (SJ301)
L-CH, R-CH

level meter

0 dB=0.775 V

RV101 (L)

RV201 (R)















REC Bias
Adjustment