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13

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

omitted.

a.

: Error number.

bb

: Error code.

xx

: Not used.

• Clearing History Information
Clearing laser hours:

Press the  DVD DISPLAY  and  CLEAR  buttons in this order.
Then both CD and DVD data are cleared.

Press the  DVD TOP MENU  and  CLEAR  buttons in this order.

Press  DVD MENU  and  CLEAR  buttons in this order.
The data have been initialized when “EEPROM Initialize
Finished”  message is displayed.

• 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 (IC801) failed, or DSD

decoder (IC801) 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 layers 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 button or o button.

### Mecha Error History ###

  1. aa bb cc dd ee xx xx xx

  2. aa bb cc dd ee xx xx xx

  3. aa bb cc dd ee xx xx xx

  4. aa bb cc dd ee xx xx xx

  5. aa bb cc dd ee xx xx xx

  6. aa bb cc dd ee xx xx xx

  7. aa bb cc dd ee xx xx xx

  8. aa bb cc dd ee 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)

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 table at an error occurred.

(tbl sq jcp)
13

: The rotation stop position determination error of a table

11 to 12 : The loading position determination error of a table

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

(lod op 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)

ee : The status of  table operation. (“n” is unfixed)

(tbl op jcp)
1n : Rotating in the direction of a forward.
2n : Rotating in the direction of a reverse.

14

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

MHC-RVXXXD

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  ENTER  button.

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.

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)

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

15

oscilloscope

set

J802
VIDEO OUTPUT

75 

Ω

1.00 

±

 0.05 Vp-p

(WHITE 100%)

1. VIDEO board is basically designed to operate without

adjustment. Therefore, check each item in order given.

2. Use DVD reference disc unless othermise indicated.

[DVD reference disc]
LUV-P01 (CD)

: PART No. 4-999-032-01

TDV-520CSO (DVD-SL) : PART No. J-2501-236-A
TDV-540C (DVD-DL)

: PART No. J-2501-235-A

 Do not use exiting test disc for DVD.

3. Use an oscilloscope with more than 10M

Ω impedance.

4. Clean the object lens by an applicator with neutral detergent

when the signal level is low than specified value with the
following checks.

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 8 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).

Procedure:
1. Connect an oscilloscope to test point pin 1 and pin 3 of CN901

on the DMB03 board.

2. Turn the power on.
3. Put the disc (LUV-P01) (Part No.: 4-999-032-01) (CD) in to

playback.

4. Confirm that oscilloscope waveform is clear and check RF

signal level is correct or not.

5. Put the disc (TDV-520CSO) (Part No.: J-2501-236-A) (DVD) in

to playback.

6. Perform Comfirmation in the same manner as step 4.

A clear RF signal waveform means that the shape “

◊” can be clearly

distinguished at the center of the waveform.

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

±0.05Vp-p.

oscilloscope

+

DMB03 board

CN901 pin 1

–

CN901 pin 3

CD : 1.05 

±

 0.2 Vp-p

VOLT/DIV : 200 mV 
TIME/DIV : 500 nS

DVD : 1.09 

±

 0.2 Vp-p

RF signal waveform

– DMB03 BOARD (SIDE A) –

CN901

1

7

16

0 dB=0.775 V

1. Demagnetize the record/playback head with a head

demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the

parts adjust.

4. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this

service manual.  (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

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

CH.

7. Switches and controls should be set as follows unless otherwise

specified.

• Test Tape

 Perform this adjustments for both decks

Procedure:
1. Mode:  Playback

P-4-A063

6.3 kHz, –10 dB

Azimuth Adjustment

set

MAIN board
IC601
Pin 

wh

 (L-CH)

Pin 

5

 (R-CH)

MAIN board
IC601
Pin 

qk

 (GND)

+

–

level meter

test tape
P-4-A063
(6.3 kHz, –10 dB)

2. Turn the adjustment screw and check output peaks. If the peaks

do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

3. Mode:  Playback

4. After the adjustments, apply suitable locking compound to the

pats adjusted.

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

screw
position

L-CH
peak

within
1dB

output
level

L-CH
peak

R-CH
peak

within
1dB

screw
position

R-CH
peak

MAIN
board
IC601

test tape
P-4-A063
(6.3 kHz, –10 dB)

pin 

5

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

pin 

qk

pin 

wh

L

R

forward

reverse