JVC UX-A70MDR Service Manual

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UX-A70MDR

SERVICE MANUAL

MICR COMPONENT MD SYSTEM

UX-A70MDR

Supplement

B E EN

It will guide to be change in the following in service manual UX-A70MDR No.20907 issued before.

The mistake is partially found in MD and the CD adjustment, and all

1. sentences are replaced. (Refer to page 1-29

Guide of extension cable for repair.

1-32 of service manual UX-A70MDR No.20907)

Parts No.

QUQ110-2130BM

EXTUXA70MD-14P

Usage

Extension for MD unit

Extension for CD unit (2 piece use)

Area Suffix

U.K

Continental

Northern Europe

Eastern

Contents

Adjustment method

1)CD section -------------------------------------------1-2

2)MD section-------------------------------------------1-3

(CD/MD section)-----------------------1-2

No.20907B

Mar. 2001

UX-A70MDR

Adjustment Method (CD/MD section)

1. Jigs and test instruments

Laser power meter Laser power meter sensor (or disk sensor) Premastered disk (MRG-1018) Recordable disk

2. Adjustment and check items

1) Indications in the modes that all LCD's are on

2) CD section

(1) Indication of the C1 error (2) Cancel of the C1 error indication

3) MD section

(1) Setup of the TEST MODE 1 (2) Initialization of the EEPROM (3) Adjustment of the laser power (4) Adjustment of the disk (5) Setup of the TEST MODE 2 (6) Indication of variation in the pickup adjustment value (7) Indication of the C1 error (8) Cancel of the TEST MODE

3. Adjustment and check method

1) CD section

(1) Indication of the C1 error

While pressing both the POWER key and BACK SKIP key on the main unit, turn on the primary power supply.

FL indication

CRC = 0

Press the CD OPEN/CLOSE key and insert the test disk.

Press the CD PLAY key. The set starts counting and the number of error correction times is indicated every 10 seconds.

FL indication

CRC = ***

200 Hz or less

1-2

(2) Cancel of the C1 error indication

To cancel the C1 error indication, cut off the power supply.

2) MD section

UX-A70MDR

(1) Setup of the TEST MODE 1

While pressing both the POWER key and FORWARD SKIP key, turn on the primary power supply.

FL indication TEST MODE 1

Setup is complete.

(3) Adjustment of the playback laser power

Set up the TEST MODE 1.

Press the STOP key on

the remote controller.

(2) Initialization of the EEPROM

(The EEPROM can be initialized on the precondition that the setup of the TEST MODE 1 is complete. After setup of the TEST MODE 1, proceed to the following operations with the remote controller*.)

* For EJECT operation, use the EJECT key on the main unit.

Initialization of the EEPROM

Press the OPEN/CLOSE key on

Press the PLAY MODE key on

Press the STOP key on

(4) Adjustment of the recording laser power

Set up the TEST MODE 1.

the main unit

the remote controller.

FL indication

TEST MODE 1

the remote controller.

Press the STOP key on

the remote controller.

Setup is complete.

Insert the laser power meter sensor.

Press the "2" key on the remote controller.

Set up the playback laser power.

Increase the laser power with the F. SKIP key on the remote controller.

Adjust the power to be 0.68 mW or more. If the value exceeds 0.68 mW, approximate it to 0.68 mW as accurately as possible.

Press the STOP key on

the remote controller.

Press the MD EJECT key on the main unit.

Decrease the laser power with the B. SKIP key on the remote controller.

Insert the laser power meter sensor.

Press the "4" key on the remote controller.

Set up the recording laser power.

Increase the laser power with the F. SKIP key on the remote controller.

Adjust the power to be 6.23 mW or more. If the value exceeds 6.23 mW, approximate it to 0.68 mW as accurately as possible.

Press the STOP key on

the remote controller.

Press the MD EJECT key on the main unit.

Decrease the laser power with the B. SKIP key on the remote controller.

Setup of the MD laser power is complete.

1-3

UX-A70MDR

(5) Adjustment of the disk

Set up the TEST MODE 1.

Insert the premastered disk.

Reading of TOC ends.

Press the MD PLAY key on the remote controller.

FL indication ON TUNING

Automatic adjustment starts.

Adjustment OK?

YES

FL indication OK TUNING

Press the STOP key on the remote controller.

* If an error indication of "ERR:07"

appears at the first adjustment, try to make a fresh start of the same adjustment.

FL indication NG ERR: XX

XX: Refer to the NG judgment code table.

Press the STOP key on the remote controller.

Press the EJECT key on the main unit.

Insert a recordable disk.

Press the MD PLAY key on the remote controller.

FL indication ON TUNING

Automatic adjustment starts.

Adjustment OK?

YES

NG Judgment Code Table

Code

00 Automatic adjustment is incomplete. 01 Rest switch detection 02 Focus-on 03 EF balance, tracking offset adjustment (Pit area) 04 ABCD level (I-V resistance) adjustment (Pit area) 05 Focus servo AGC (Pit area) 06 Tracking servo AGC (Pit area) 07 Focus bias adjustment (Pit area) 08 EF balance, tracking offset adjustment (GRV area) 09 ABCD level (I-V resistance) adjustment (GRV area) 0A Focus servo AGC (GRV area) 0B Tracking servo AGC (GRV area) 0C Focus bias adjustment (GRV area) 0D Room temperature measurement 0E Write in EEPROM 10 (Focus, TRK, SLED) AGC data read time-out 20 Pit area spindle lock 30 Groove area spindle lock XX Automatic adjustment is complete.

NG item in adjustment

FL indication ON TUNING

Press the STOP key on the remote controller.

Press the MD EJECT key on the main unit.

1-4

FL indication NG ERR: XX

Refer to the NG judgment code table.

Automatic adjustment ends.

Press the POWER key on the main unit or remote controller.

Cut off the power supply after cancelling the TEST MODE.

UX-A70MDR

For investigating the mode in which an error occurred during the disk adjustment, freeze the set in the mode by pressing the proper key (refer to the table on the right) on the remote controller before cancelling the TEST MODE 1.

(6) Setup of the TEST MODE 2

While pressing both the POWER key and FORWARD STOP key on the main unit, turn on the primary power supply.

FL indication TEST MODE 2

While pressing the STOP key on the main unit, press the FM/AM key on the main unit double. The TEST MODE 2 is set up.

Key to press Mode

SLEEP key (Remote controller)

"6" key (Remote controller) "7" key (Remote controller) "8" key (Remote controller) "9" key (Remote controller)

STOP key (Remote controller)

EJECT key (Main unit)

FOCUS SEARCH

PIT ROUGH SERVO

GROOVE ROUGH SERVO

TRACKING ON

TRACKING OFF

STOP

EJECT

FL indication TEST MODE 2

Setup is complete.

(7) Indication of variation in the pickup adjustment value

Set up the TEST MODE 2.

Press the MD OPEN/CLOSE key and insert the MD test disk.

Press the "6" key on the remote controller.

FL indication*

XXXXX - XXXX

* Each time the

"6" key on the remote controller is pressed, the indication changes from ASG to TRG, from TRG to TRB, and so on as shown in the figure.

ASG TRG TRB FOB FGR

FEXP

FGC

TGR

TEXP

TGC

-1

-2 :

-128 127 126

: 1 0

(8) Indication of the C1 error

Set up the TEST MODE 2.

Press the MD OPEN/CLOSE key and insert the MD test disk.

Press the "8" key on the remote controller. Counting of number of C1 errors starts and it continues until it counts up the maximum number of C1 errors with indication (maximum number of error indication is 432).

FL indication*

200 Hz or less

X X Y Y Z Z

(9) Cancel of the TEST MODE

(The cancel operation is common to the TEST MODE 1 and 2.)

Cut off the primary power supply to cancel the TEST MODE.

1-5

UX-A70MDR

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.20907B)

200103

JVC UX-A70MDR Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Adjustment Method (CD/MD section)