JVC XL-R910SL User manual

SERVICE MANUAL
COMPACT DISC RECORDER
No.A0009
Apr. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
XL-R910SL
XL-R910SL
Area Suffix
J ------------------- U.S.A.
C ---------------- Canada
B --------------------- U.K.
E -- Continental Europe
EN --- Northern Europe
This service manual is printed on 100% recycled paper.
Contents
Safety precautions ----------------------- 1-2
Disassembly method -------------------- 1-3
Troubleshooting -------------------------- 1-6
Description of major ICs ---------------- 1-11

XL-R910SL
1-2
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.
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
exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
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.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!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.

XL-R910SL
1-3
Disassembly method
<Main body>
Removing the metal cover (See Fig.1)
Removing the front panel assembly (See Fig.2~5)
1.Remove the three screws Aattaching the metal cover
on the back of the body.
2.Remove the four screws Battaching 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.
* Prior to performing the following procedure, remove the
metal cover.
1.Remove the three screws Cattaching 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.
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 aon the lower part of the sides
using a screwdriver, and remove the front panel assembly
toward the front.
Fig. 2
Fig. 3
Fig. 4
C
C
Metal cover
B x 2
A
AA
Fig. 1
B x 2
C
Front panel assembly
joint a
Joint a
Front panel assembly
Front panel assembly
Fig. 5
ACW1
Main board
Tie band
Tie band
G
NCW1
CN502
CN701
CN601
D
F
F
RCW1
RCW2
Mechanism
assembly

XL-R910SL
1-4
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 Dattaching the
mechanism assembly.
*Please fix two earth wires together when you
install the mechanism assembly.
Removing the main board (See Fig.5,7)
* Prior to performing the following procedure,
remove the metal cover.
1.Remove the four screws Eattaching 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 Dattaching the earth wire.
6.Remove the two screws Fand 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.
Fig. 6
Main board
D
D
D
D
Mechanism
assembly
Power
button
arm
Orange
color part
Earth wire
CN501
CN701
Earth wire
Fig. 7
EEEECord bushing
Fig. 5
ACW1
Main board
Tie band
Tie band
G
NCW1
CN502
CN701
CN601
D
F
F
RCW1
RCW2
Mechanism
assembly

XL-R910SL
1-5
Removing the power transformer (See Fig.6~8)
* Prior to performing the following procedure,
remove the metal cover.
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 Hattaching the power
transformer.
Please remove a tie band if necessary.
Please fix the wire again with a tie band when
assembling. Fig. 6
Mechanism
assembly
Power
button
arm
Orange
color part
Tie band
Fig. 8
Main board
Power transformer board Power transformer
H
H
RCW1
Tie band
Fig. 7
Cord bushing

XL-R910SL
1-6
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)
Check voltage
output of RIC1(7805)
:5V?
Check voltage
input of RIC1(7805)
:8V?
Check voltage
positive of RC7(6800uF/25V)
at main PCB : 12V?
Check connector (UCW1)
front PCB to main PCB
Replace RIC1
Replace RQ4,
RZD4,RR5
Check for RC7,RD5,RD6,RD7,RD8,
RFU3,RCW1,PFU1/PFU2
Check oscillation
of UX1(6MHz) at front
PCB
Check voltage
pin No27(p.sense)
of UIC1 : 5V
Check voltage
output of RIC3(78L05) at
main PCB : 5V?
Check voltage
positive of MC1(10uF/50V)
:15V?
Replace UX1,SC4,
SC5,UIC1
Check for UCW1(8P),
SR3,UC7,UD1,UQ1,UC6,UR2
Replace RIC3
Check for MC1,MR1,MD1,
RCW1,RFU3,PFU1/PFU2
Check voltage
pin No46 of UIC1
:-30V?
Check voltage
negative of RC9
(100uF/500V)
:-30V?
Check voltage
negative of RC8
(100uF/100V)
:-42V?
Check for RC8,RD9,RR9
RCW1,PFU1/PFU2
Check connector(UCW1)
from front PCB to main PCB
Check for RR6,RZD5,
RZD6,RR7,RZD7
Check voltage
between 1 and 2, between
48 and 49 of VFD1
:AC4V?
-Check connector of UCW1
-Check for RCW1,PFU1/PFU2
Replace micom ,VFD1
No No No No
No No No
No
No
No No
No
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s
Ye s
Ye s
Ye s Ye s
Ye s

XL-R910SL
1-7
Analog output (play mode)
When trouble is found in the analog signal output.
Check voltage
pin No2,3 of DAC(NIC1,
AK4324) at main
PCB : 5V?
Check voltage
output of RIC2(78L05)
:5V?
Check voltage
input of RIC2(78L05)
:8V?
Check voltage
positive of RC7(6800uF/25v)
at main PCB : 12V?
Check NL1(10uF)
Replace RIC2
Replace RQ3,
RZD3,RR3
Check for RC7,RD5,RD6,RD7,RD8,
RFU3,RCW1,PFU1/PFU2
Check voltage pin
No5 of MIC1(DAC,
AK4324):5V?
Check voltage
output of RIC3(78L05)
:5V?
Check voltage
positive of MC1(10uF/
50V) :15V?
Check for NC20,NR20 Replace RIC3
Check wave
input pin No 4(MCLK:
16,9344MHz),6(BCK),7(DATA),
8(LRCK), of NIC1
(DAC,AK4324)
: normal?
Check wave
output pin No 1,2,3,4, of
NCW1(17P FPC)
:normal?
Check NR1,2,3,4
Check voltage
pin No 9 of NIC1(DAC,
AK4324) : 0V?
-Check for mute micom and RCW2
No No No No
No No No
No
No
Check solder of NIC1
No
No
Ye s Ye s Ye s Ye s
Ye s Ye s Ye s
Ye s
Ye s
Check analog
wave output of AR1,2,3,4
(10k)
Ye s
Check for AIC1,AIC2(4560),
OP amp 4560
No
Check analog
wave output at pin No1,7
of AIC2(4560)
Ye s
-Check solder of AJA1
-Check analog wave of AJA1
-Check connector of audio cable
No
Check voltage
base of MQ5,MQ6(C945)
:0.6V
Ye s
Ye s
Check voltage
of RJW2 : -8V?
RJW4 : +8V?
Check voltage
output of
RC6(2200uF/25) : +12V?
RC7(2200uF/25V) : -12V?
No No
Ye s Ye s
Check for MC1,MR1,MD1,
RCW1,RFU3,PFU1/PFU2
-Check connecting of NCW1(17P FPC)
-Replace mechanism
Check for RD1,2,3,4(IN4002)
RFU1,RFU2(1A),RCW1,PFU1,PFU2
Check for RQ2,RZD2,RR2,
RQ1,RZD1,RR1
Check for micom mute line,
MR6,MQ3,MQ4,MD4,MD5,MQ1

XL-R910SL
1-8
Digital output
When trouble is found in the optical output and coaxial output.
Check signal
(digital) input pin No 1
of NIC1(74HCN04)
Check signal
(digital) input pin No 15
of NCW1(17P)
Check for MR14,NC7
Check signal
(digital) output pin No 4,6
of NIC1(74HCU04)
Check voltage
of NIC1(74HCU04)
pin No14:5V?
No7:0V?
Check voltage
input of RIC2(78L05)
:8V?
Replace NIC1 Replace RIC2
Check voltage
pin No2 of NOM2
(optical transmitter)
:5V?
-Check for NEF1,NEF2,NR10,NR11,NR12
-Replace NOM2
-Check solder of between NOM2 and NJA1
-Check for optical cable and coaxial cable
No No
No No No
No
Ye s Ye s
Check voltage
positive of RC7(6800uF/25v)
at main PCB : 12V?
Replace RQ3,
RZD3,RR3
Check for RC7,RD5,RD6,RD7,RD8,
RFU3(2.5A),RCW1,PFU1/PFU2
No
Ye s
Ye s Ye s Ye s
Ye s
Check connector to NCW1(17P)
Check mechanism

XL-R910SL
1-9
Mechanism operation
When trouble is found in the mechanism operating. (rotation,play,tray open/close,lead)
Check voltage
pin No 2 of RCW3(6P)
at main PCB : 8V?
Check voltage
positive of RC7(6800uF/
25V) : 12V?
Check for RQ3,RZD3,RR3
Check voltage
pin No 4,6 of RCW3(6P)
at main PCB : 5V?
Check voltage
input of RC1(7805)
:8V?
Check voltage
positive of RC7(6800uF/
25V) : 12V?
Replace RIC1 Check for RQ4,RZD4,RR5
No No
No No
Ye s Ye s Ye s
Ye s
Check wave
pin No3(CDR-RCT) of
UCW2(9P) at front PCB
when power ON
No
Ye s
Check wave
pin No4~9 of UCW2(9P)
:interface wave ?
No
Ye s
Ye s Ye s
Replace mechanism
Check for RC7,RD5,RD6,RD7,RD8
RFU3(2.5A),RCW1,PFU1,PFU2
-Check pin No 1 of micom(UIC1)
-Check connecting of UCW2(9P)

XL-R910SL
1-10
Digital recording (CD-R/CD-RW Disc, Unfinalize condition)
When trouble is found in the digital recording (optical recording).
Analog recording (CD-R/CD-RW Disc, Unfinalize condition)
When trouble is found in the analog recording.
Check selecting
for source at front panel
:optical
Check signal
(digital) input pin No11
of NCW1(17P)
Check voltage
pin No3 of NOM1(optical
receiver) : 5V?
-Check for NR13,NC13
-Check solder of NOM1,NCW1
No
No No
Ye s
Ye s Ye s
-Check connector of NCW1(17P)
-Check mechanism
Selecting optical mode by source key
Check selecting
mode for source at front
panel : analog
No
Ye s
Selecting analog mode by source key
Check location
VR(ana.rec) at front panel
: 3o'clock
No
Ye s
Adjust volume (analog rec.)
Check signal
(analog) input pin No
1,3 of ACW1(3P)
No
Ye s
-Check for AC6,AC7,AC22,AD23,AC24
AC25,AR25,AR26,AR27,AR28
-Check solder AJA1
Check signal
(analog) input pin No
5,6 of UVR1 at
front PCB
No
Ye s
-Check connector UCW3
Check signal
(analog) input pin No
1,3 of connector
(4P) from mecha.
to front PCB
No
Ye s
-Check signal of UVR1
-Check connector (4P) of mechanism
Check voltage of RIC2(78L05)
Replace mechanism

XL-R910SL
1-11
Serial Input
Interface
8x
Interpolator
8x
Interpolator
Clock OSC/Divider
De-emphasis
Control
Modulator
Modulator
SCF
SCF
DZFL
AOUTL+
AOUTL-
AOUTR+
AOUTR-
DZFR
LRCK
BICK
S DATA
PD
SMUTE
DFS
MCLK CKS DVDD DVSS VREF
DIF0 DIF1 DIF2 DEM0 DEM1 AVDD AVSS
AK4324(NIC1) : D/A Converter
DVSS
DVDD
CKS
MCLK
PD
BICK
S DATA
LRCK
SMUTE
DFS
DEM0
DEM1
DZFL
DZFR
AVDD
VREF
AVSS
AOUTL+
AOUTL-
AOUTR+
AOUTR-
DIF2
DIF1
DIF0
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
DVSS
DVDD
CKS
MCLK
PD
BICK
S DATA
LRCK
SMUTE
DFS
DEM0
DEM1
-
-
I
I
I
I
I
I
I
I
I
I
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
De-emphasis frequency select
Pin
No. Symbol Function
13
14
15
16
17
18
19
20
21
22
23
24
DIF0
DIF1
DIF2
AOUTR-
AOUTR+
AOUTL-
AOUTL+
AVSS
VREF
AVDD
DZFR
DZFL
I
I
I
O
O
O
O
-
I
-
O
O
Digital input format pin
Digital input format pin
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
Pin
No. Symbol Function
1. Pin layout
2. Block diagram
3. Pin function
I/O I/O
Description of major ICs

XL-R910SL
1-12
1
2~10
11
12
13
14
15
16
17
18
19
20
21~26
27
28
29
30~41
42~45
46
47
48
49.50
51
52~63
64~71
72
73~88
89
90
91.92
93
94
95
96
97
98
99
100
O
-
-
I
-
-
-
I
O
-
I
I
-
I
I
I
O
O
-
O
O
-
-
O
-
-
-
-
-
-
O
-
O
I
I
-
O
O
Pin No.
Symbol
XRST
GND
RESET
VDD
VDD
GND
XIN
XOUT
VDD
KEY1
KEY2
GND
P.SENSE
R-REQ
REMOCON
1G~12G
P18~P15
VDD
P14
P13
VPP
P12~P1
VDD
GND
VDD
MUTE
SIN
SOUT
ACLK
S-RDY
S-REQ
I/O Description
2.Pin function
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
AH11-00018B(UIC1):System controller
51
80
30
1
50 31
81 100
~
~
~ ~
1.Terminal layout

Printed in Japan
200104(O)
No.A0009
XL-R910SL
VICTOR COMPANY OF JAPAN, LIMITED
PERSONAL & MOBILE NETWORK BUSINESS UNIT
1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan