JVC UX-A70MDR Service Manual

UX-A70MDR

SERVICE MANUAL

MICR COMPONENT MD SYSTEM

UX-A70MDR

Supplement

B
E
EN

EV

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

2.

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

COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.

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.