JVC XL-R910SL Service Manual

Page 1

SERVICE MANUAL

COMPACT DISC RECORDER

XL-R910SL

J ------------------- U.S.A. C ---------------- Canada B --------------------- U.K. E -- Continental Europe EN --- Northern Europe

XL-R910SL

Area Suffix

Contents

Safety precautions ----------------------- 1-2 Disassembly method -------------------- 1-3 Troubleshooting -------------------------- 1-6 Description of major ICs ---------------- 1-11

This service manual is printed on 100% recycled paper.

No.A0009

Apr. 2001

Page 2

XL-R910SL

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics.

These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassembling.

5. Leakage current check (Electrical shock hazard testing) After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet , particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)

Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter.

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not

0.15 F AC TYPE

1500 10W

Place this probe on each exposed metal part.

exceed 0.75 V AC (r.m.s.). This corresponds to 0.5

Good earth ground

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

1-2

Page 3

Disassembly method

XL-R910SL

Removing the metal cover (See Fig.1)

1.Remove the three screws A attaching the metal cover on the back of the body.

2.Remove the four screws B attaching the metal cover on both sides of the body.

3.Remove the metal cover from the body by lifting the rear part of the cover.

ATTENTION : Do not break the front panel tab fitted to the metal cover.

Removing the front panel assembly (See Fig.2~5)

* Prior to performing the following procedure, remove the metal cover.

1.Remove the three screws C attaching the front panel assembly on the bottom of the body and both sides of the body.

2.Disconnect the card wire from connector CN601 on the servo control board.

Metal cover

B x 2

Front panel assembly

Fig. 1

Fig. 2

3.Disconnect the 4pin wire from connector CN502 on the servo control board.

4.Disconnect the 3pin wire and 8pin wire from connector ACW1 and RCW2 on the main board.

Please remove a tie band if necessary. Please fix the wire again with a tie band when assembling.

5.Release the two joints a on the lower part of the sides using a screwdriver, and remove the front panel assembly toward the front.

RCW2

ACW1

RCW1

Tie band

Mechanism

assembly

Main board

NCW1

CN502

Tie band

CN701

CN601

Front panel assembly

Fig. 3

Front panel assembly

Joint a

joint a

Fig. 4

Fig. 5

1-3

Page 4

XL-R910SL

Removing the power button arm (See Fig.6)

* Prior to performing the following procedure, remove the metal cover and front panel assembly.

The power button arm is lifted up while holding the power switch(orange color part) and removes.

Removing the mechanism assembly (See Fig.6)

* Prior to performing the following procedure, remove the metal cover and front panel assembly.

1.Disconnect the card wire from connector CN501 on the servo control board.

2.Disconnect the 6pin wire from connector CN701 on the servo control board.

3.Remove the four screws D attaching the mechanism assembly.

*Please fix two earth wires together when you install the mechanism assembly.

Removing the main board (See Fig.5,7)

RCW1

Tie band

Orange

color part

Earth wire

RCW2

Mechanism

assembly

Mechanism

assembly

ACW1

Main board

NCW1

CN502

Tie band

CN701

CN601

Fig. 5

Main board

CN501

* Prior to performing the following procedure, remove the metal cover.

1.Remove the four screws E attaching the each terminal on the rear panel.

2.Disconnect the 9pin,8pin and 3pin wire from connector RCW1,RCW2 and ACW1 on the main board.

3.Disconnect the card wire from connector NCW1 on the main board.

4.Disconnect the 6pin wire from connector CN701 on the servo control board.

5.Remove the screw D attaching the earth wire.

6.Remove the two screws F and one screw G attaching the main board.

Please remove a tie band if necessary. Please fix the wire again with a tie band when assembling.

Power button

arm

Earth wire

CN701

Fig. 6

Cord bushing

Fig. 7

1-4

Page 5

Removing the power transformer (See Fig.6~8)

* Prior to performing the following procedure, remove the metal cover.

XL-R910SL

Tie band

1.Power button arm is removed from power switch

2.Disconnect 9pin wire from connector RCW1 on the main board.

3.The code bushing is pulled out for above.

4.Remove the four screws H attaching the power transformer.

Please remove a tie band if necessary. Please fix the wire again with a tie band when assembling.

Orange

color part

Mechanism

assembly

Power button

arm

Fig. 6

Main board

Tie band

RCW1

Power transformer board

Fig. 7

Power transformer

Cord bushing

Fig. 8

1-5

Page 6

XL-R910SL

Troubleshooting

Power supply / VFD (FL display) section

When trouble is found in the power supply and the FL display.

Check voltage

pin No13,14,18,46,72 of

UIC1 front PCB

: 5V(VDD)

Ye s Ye s Ye s Ye s

Check oscillation

of UX1(6MHz) at front

PCB

Ye s Ye s Ye s

Check voltage

pin No46 of UIC1

:-30V?

Ye s

No No No No

No No No

Check voltage

output of RIC1(7805)

:5V?

Check connector (UCW1)

front PCB to main PCB

Check voltage

pin No27(p.sense)

of UIC1 : 5V

Check voltage

input of RIC1(7805)

:8V?

Replace RIC1

Check for RC7,RD5,RD6,RD7,RD8,

RFU3,RCW1,PFU1/PFU2

Check voltage

output of RIC3(78L05) at

main PCB : 5V?

Check voltage

positive of RC7(6800uF/25V)

at main PCB : 12V?

Replace RQ4,

RZD4,RR5

Check voltage

positive of MC1(10uF/50V)

:15V?

Ye s

Check for UCW1(8P),

SR3,UC7,UD1,UQ1,UC6,UR2

Check voltage

negative of RC8

(100uF/100V)

:-42V?

Replace RIC3

Check for MC1,MR1,MD1, RCW1,RFU3,PFU1/PFU2

Check for RC8,RD9,RR9

RCW1,PFU1/PFU2

Replace UX1,SC4,

SC5,UIC1

Check voltage

negative of RC9

(100uF/500V)

:-30V?

No No

Ye s Ye s

Check voltage

between 1 and 2, between

48 and 49 of VFD1

:AC4V?

Ye s

Replace micom ,VFD1

Check connector(UCW1)

from front PCB to main PCB

-Check connector of UCW1

-Check for RCW1,PFU1/PFU2

Check for RR6,RZD5,

RZD6,RR7,RZD7

1-6

Page 7

Analog output (play mode)

When trouble is found in the analog signal output.

XL-R910SL

Check voltage

pin No2,3 of DAC(NIC1,

AK4324) at main

PCB : 5V?

Ye s Ye s Ye s Ye s

Check voltage pin

No5 of MIC1(DAC,

AK4324):5V?

Ye s Ye s Ye s

Check wave

input pin No 4(MCLK:

16,9344MHz),6(BCK),7(DATA),

8(LRCK), of NIC1

(DAC,AK4324)

: normal?

Ye s

No No No No

No No No

Check voltage

output of RIC2(78L05)

:5V?

Check NL1(10uF)

Check voltage

output of RIC3(78L05)

:5V?

Check for NC20,NR20

Check wave

output pin No 1,2,3,4, of

NCW1(17P FPC)

:normal?

Check voltage

input of RIC2(78L05)

:8V?

Replace RIC2

Check for RC7,RD5,RD6,RD7,RD8,

RFU3,RCW1,PFU1/PFU2

Check voltage

positive of MC1(10uF/

50V) :15V?

Replace RIC3

-Check connecting of NCW1(17P FPC)

-Replace mechanism

Check voltage

positive of RC7(6800uF/25v)

at main PCB : 12V?

Replace RQ3,

RZD3,RR3

Check for MC1,MR1,MD1, RCW1,RFU3,PFU1/PFU2

Ye s

Check voltage

pin No 9 of NIC1(DAC,

AK4324) : 0V?

Ye s

Check analog

wave output of AR1,2,3,4

(10k)

Ye s

Check voltage

of RJW2 : -8V?

RJW4 : +8V?

Ye s

Check analog

wave output at pin No1,7

of AIC2(4560)

Ye s

Check voltage

base of MQ5,MQ6(C945)

:0.6V

Check NR1,2,3,4

-Check for mute micom and RCW2

Check solder of NIC1

Check for AIC1,AIC2(4560),

OP amp 4560

-Check solder of AJA1

-Check analog wave of AJA1

-Check connector of audio cable

Check voltage

No No

output of

RC6(2200uF/25) : +12V?

RC7(2200uF/25V) : -12V?

Ye s

Check for RQ2,RZD2,RR2,

RQ1,RZD1,RR1

Check for RD1,2,3,4(IN4002)

RFU1,RFU2(1A),RCW1,PFU1,PFU2

Ye s

Check for micom mute line,

MR6,MQ3,MQ4,MD4,MD5,MQ1

1-7

Page 8

XL-R910SL

Digital output

When trouble is found in the optical output and coaxial output.

Check signal

(digital) input pin No 1

of NIC1(74HCN04)

Ye s Ye s

Check signal

(digital) output pin No 4,6

of NIC1(74HCU04)

Ye s Ye s Ye s

Check voltage

pin No2 of NOM2

(optical transmitter)

:5V?

Ye s

No No

No No No

Check signal

(digital) input pin No 15

of NCW1(17P)

Check for MR14,NC7

Check voltage

of NIC1(74HCU04)

pin No14:5V?

No7:0V?

Replace NIC1

Check connector to NCW1(17P)

Check mechanism

Check voltage

input of RIC2(78L05)

:8V?

Replace RIC2

Check for RC7,RD5,RD6,RD7,RD8,

RFU3(2.5A),RCW1,PFU1/PFU2

Check voltage

positive of RC7(6800uF/25v)

at main PCB : 12V?

Ye s

Replace RQ3,

RZD3,RR3

-Check for NEF1,NEF2,NR10,NR11,NR12

-Replace NOM2

-Check solder of between NOM2 and NJA1

-Check for optical cable and coaxial cable

1-8

Page 9

Mechanism operation

When trouble is found in the mechanism operating. (rotation,play,tray open/close,lead)

XL-R910SL

Check voltage

pin No 2 of RCW3(6P)

at main PCB : 8V?

Ye s Ye s

Check voltage

pin No 4,6 of RCW3(6P)

at main PCB : 5V?

Ye s

Check wave

pin No3(CDR-RCT) of

UCW2(9P) at front PCB

when power ON

Ye s

No No

Check voltage

positive of RC7(6800uF/

25V) : 12V?

Check for RQ3,RZD3,RR3

Check voltage

input of RC1(7805)

:8V?

Ye s Ye s

Replace RIC1

-Check pin No 1 of micom(UIC1)

-Check connecting of UCW2(9P)

Check for RC7,RD5,RD6,RD7,RD8

RFU3(2.5A),RCW1,PFU1,PFU2

Ye s

Check voltage

positive of RC7(6800uF/

25V) : 12V?

Check for RQ4,RZD4,RR5

Check wave

pin No4~9 of UCW2(9P)

:interface wave ?

Ye s

Replace mechanism

1-9

Page 10

XL-R910SL

Digital recording (CD-R/CD-RW Disc, Unfinalize condition)

When trouble is found in the digital recording (optical recording).

Check selecting

for source at front panel

:optical

Selecting optical mode by source key

Ye s

Check signal

(digital) input pin No11

of NCW1(17P)

No No

Check voltage

pin No3 of NOM1(optical

receiver) : 5V?

Check voltage of RIC2(78L05)

Ye s Ye s

-Check connector of NCW1(17P)

-Check mechanism

-Check for NR13,NC13

-Check solder of NOM1,NCW1

Analog recording (CD-R/CD-RW Disc, Unfinalize condition)

When trouble is found in the analog recording.

Check selecting

mode for source at front

panel : analog

Ye s

Check location

VR(ana.rec) at front panel

: 3o'clock

Selecting analog mode by source key

Adjust volume (analog rec.)

Ye s

Check signal

(analog) input pin No

1,3 of ACW1(3P)

Ye s

Check signal

(analog) input pin No

5,6 of UVR1 at

front PCB

Ye s

Check signal

(analog) input pin No

1,3 of connector

(4P) from mecha.

to front PCB

Ye s

Replace mechanism

-Check for AC6,AC7,AC22,AD23,AC24

AC25,AR25,AR26,AR27,AR28

-Check solder AJA1

-Check connector UCW3

-Check signal of UVR1

-Check connector (4P) of mechanism

1-10

Page 11

Description of major ICs

AK4324(NIC1) : D/A Converter

1. Pin layout

XL-R910SL

DVSS

DVDD

CKS

MCLK

BICK

S DATA

LRCK

SMUTE

DFS

DEM0

DEM1

2. Block diagram

LRCK

BICK

S DATA

SMUTE

DFS

DZFL

DZFR

AVDD

VREF

AVSS

AOUTL+

AOUTL-

AOUTR+

AOUTR-

DIF2

DIF1

DIF0

DIF0 DIF1 DIF2 DEM0 DEM1 AVDD AVSS

Serial Input

Interface

Interpolator

De-emphasis

Control

Modulator

SCF

DZFL

AOUTL+ AOUTL-

AOUTR+ AOUTR-

3. Pin function

Symbol Function

No.

DVSS

DVDD

CKS

MCLK

BICK

S DATA

LRCK

SMUTE

DFS

DEM0

DEM1

I/O I/O

Clock OSC/Divider

MCLK CKS DVDD DVSS VREF

Symbol Function

No.

Digital ground terminal

Digital power supply terminal

Master clock select pin

Master clock input pin

Power down mode pin

Audio serial data clock pin

Audio serial data input

L/R clock pin

Soft mute pin

Double speed sampling mode

De-emphasis frequency select

13 14 15 16 17 18 19 20 21 22 23 24

AOUTR-

AOUTR+

AOUTL-

AOUTL+

DIF0

DIF1

DIF2

AVSS

VREF

AVDD

DZFR

DZFL

Digital input format pin

Rch negative analog output

Rch positive analog output

Lch negative analog output

Lch positive analog output

Analog ground terminal

Voltage reference input

Analog power supply terminal

Rch zero input detect pin

Lch zero input detect pin

DZFR

1-11

Page 12

XL-R910SL

AH11-00018B(UIC1):System controller

1.Terminal layout

50 31

81 100

2.Pin function

Pin No.

2~10

11 12 13 14 15 16 17 18 19 20

21~26

27 28

29 30~41 42~45

49.50 51

52~63 64~71

73~88

89 90

91.92 93 94 95 96 97 98 99

100

REMOCON

Symbol

XRST

GND

RESET

VDD VDD

GND

XIN

XOUT

VDD KEY1 KEY2

GND

P.SENSE

R-REQ

1G~12G

P18~P15

VDD

P14 P13

VPP

P12~P1

VDD

GND

VDD

MUTE

SIN

SOUT

ACLK

S-RDY

S-REQ

I/O

I I

I O O

O O

I I

O O

Mechanism reset signal output Non connect Connect to ground Micom reset signal input Power supply terminal (+5V) Power supply terminal (+5V) Connect to ground Oscillation input terminal (6MHz) Oscillation output terminal (6MHz) Power supply terminal (+5V) Key matrix input terminal (AD1) Key matrix input terminal (AD2) Connect to ground Power detect input terminal RW-I/F, RW-REQUEST input Remote control signal input FL Grid control signal output FL Segment control signal output Power supply terminal (+5V) FL Segment control signal output FL Segment control signal output Non connect VP (-30V) FL Segment control signal output Non connect Power supply terminal (+5V) Non connect Connect to ground Power supply terminal (+5V) Non connect Audio muting signal output Non connect RW-I/F, Serial data output RW-I/F, Serial data input RW-I/F, Clock input Non connect RW-I/F, SYS READY output RW-I/F, SYS REQUEST output

Description

1-12

Page 13

XL-R910SL

VICTOR COMPANY OF JAPAN, LIMITED

PERSONAL & MOBILE NETWORK BUSINESS UNIT 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan

No.A0009

Printed in Japan 200104(O)