장착법은 
L-Clock XO3와 동일합니다. 기존 Clock의 출력전압이 5v가 넘어가는 모델의 경우 
D-Clock 
기판의 출력선택을 
5V로 Setting하셔야 합니다.
 



 




Machine Specific Mounting 
Instructions.
Clock Frequency


Pioneer PDS 06.

16,9344 MHz


Pioneer PD-S505.

16,9344 MHz


Pioneer PD-S507.

16,9344 MHz


Proceed PCD 2.

11,2896 MHz


Quad 66.

11,2896 MHz


Rega Planet.

16,9344 MHz


Rotel RCD 945 
AX.

16,9344 MHz


Rotel RCD 965 
BX.

11,2896 MHz


Rotel RCD 970 
BX.

11,2896 MHz


Rotel RCD 971.

16,9344 MHz


Rotel RCD 975.

11,2896 MHz


Rotel RCD 991.

16,9344 MHz


Sony CDP 497.

22,5792 MHz


Sony X7 ESD.

16,9344 MHz


Sony CDP X 229 
ES.

45,158 MHz


Sony CDP X 303 
ES.

45,158 MHz


Sony CDP X 505 
ES.

45,158 MHz


Sony CDP X 777 
ES.

45,158 MHz


Sony CDP X 779 
ES.

45,158 MHz


Sony CDP XA 5 
ES.

45,158 MHz


Sony CDP XA 30 
ES.

45,158 MHz


Sony CDP XA 50 
ES.

45,158 MHz


Sony CDP XB 
920.

45,158 MHz


Sony CDP XE 900.

45,158 MHz


Sugden 
Optima.

11,2896 MHz


Teac VRDS 10.

16,9344 MHz


Teac VRDS 25.

18,432 MHz


Technics SL-PS 
620A.

33,8688 MHz


Technics SL-PS 
840.

33,8688 MHz


Thule Spirit.

16,9344 MHz


Yamaha CDX-580

16,9344 MHz


Yamaha CDX-880

16,9344 MHz


Yamaha CDX-590

16,9344 MHz


Yamaha CDX-890

16,9344 MHz


Yamaha CDX-593

16,9344 MHz


Yamaha CDX-893

16,9344 MHz

 
 
 




 

Pioneer PDS-06 I TOP I



Clock Frequency
16,9344MHz

Converter type
PCM 1702 J

Opamps Type
NJM 2114D

Opamp replacements
AD825 Type 1, 2 
pcs.
 

 


Remove the screws holding the top cover, both on the sides, and 
on the rear panel. Remove all copper clad screws from right hand located Main 
Circuit Board. Also remove the screws holding the plugs to the rear 
panel.
Push the CD tray out a bit, by first pushing the smaller of the two 
plastic actuator sticks.
Carefully tilt the main Circuit Board out to access 
the solder side.
Remove the Oscillator X301, it is located near the inner 
corner of the Main Circuit Board.
Connect LClock Out (Red twisted wire) to the solder pad of X301, 
nearest W368.
Connect LClock Gnd (Blue twisted wire) to the GND-pad of X301 - 
the pad nearest IC61.
Connect LClock +12 V (Red single wire) to W366, about 2 
cm. (<1 inch) towards the inner corner of the Circuit 
Board.

 



 

Pioneer PD-S505 
I TOP I 



Clock Frequency
16,9344MHz

Converter type
PD 2029A

Opamps Type
NJM 4558 (...)

Opamp Replacements
AD825 Type 1, 1 
pcs.

Remove the screws holding 
the top cover, both on the sides, and on the rear panel. Remove all copper clad 
screws from right hand located Main Circuit Board. Also remove the screws 
holding the plugs to the rear panel.
Push the CD tray out a bit, by first 
pushing the smaller of the two plastic actuator sticks.
Carefully tilt the 
main Circuit Board out to access the solder side.
Remove the crystal unit 
'X401' it is found right next to the D/A Converter PD2029A.
Also remove the 
two capacitors C403 and C404.
Connect LClock Out (Red twisted wire) to the 
solder pad of CNB3, closest to the front panel.
Connect LClock Gnd (Blue 
twisted wire) to the solder pad of CNB3, closest to the back panel.
Connect 
LClock +12 V (Red single wire) to + terminal on C419, about 2 cm. (<1 inch) 
from the back-most corner of the Circuit Board.

Pioneer PD-S507 
I TOP I



Clock Frequency
16,9344MHz

Converter type
PE8001A (same type as DV-717)

Opamps Type
NJM 4558 (...)

Opamp Replacements
AD825 Type 3, 1 
pcs.
Remove the screws holding the top cover, both on the sides, and 
on the rear panel. Remove all copper clad screws from right hand located Main 
Circuit Board. Also remove the screws holding the plugs to the rear 
panel.
Push the CD tray out a bit, by first pushing the smaller of the two 
plastic actuator sticks.
Carefully tilt the main Circuit Board out to access 
the solder side.
Remove the crystal unit 'X401' it is found 10cm (4 inches) 
in front of the Line Out plugs.
Also remove the two capacitors C403 and C404. 
These are Surface Mounted Devices, and best removed by alternating the Soldering 
iron, in order to keep both ends melted. Then You can push the component away 
from the copper pad, and then pick it up with at tweezer.
Connect LClock Out 
(Red twisted wire) to the solder pad of X401, closest to the CD 
transport.
Connect LClock Gnd (Blue twisted wire) to the wire link labelled 
'GND', right next to X401.
Connect LClock +12 V (Red single wire) to LClock 
XO Supply (Required for this model).
Remember to also connect LClock ground 
to the XO power supply. Best taken from the minus of the 10.000 uF Capacitor. 

Proceed PCD 2 I TOP I



Clock Frequency
11,2896MHz

Converter type
Burr Brown PCM 
58P

Remove the top cover by 
unscrewing the six screws on the bottom side of the enclosure. The Crystal unit 
is placed on the vertical sidepanel mounted PCB, on the upper part, near the 
rear of the enclosure.
Remove the Crystal unit X400, C402 and 
C403.
Connect LClock Out (Red twisted wire) to the pcb solder pad of X400 
placed downmost. (Corresponds to pin 11 on SAA7220).
Connect LClock Gnd (Blue 
twisted wire) to the pcb solder pad of C402 placed downmost.
Connect LClock 
+12V (Red single wire) to CR004, the upmost solder terminal. CR004 is placed 
approximately 2 cm. below the Crystal unit.

Quad 
66 I TOP I



Clock Frequency
11,2896 MHz

Converter type
Philips 
TDA1541A

Remove the two black 
screws on the middle of the bottom plate. Remove the screws by both sides under 
the bottom plate. Lift the top part away.
Remove the two screws in each side, 
holding the back panel. Push the back panel back away from the rest of the 
player.
Remove 4 screws, holding the CD transport, of which two are placed 
under the CD tray. Look in the hole in each side of the tray, while pushing the 
tray out. The two screws will appear when the tray is all out.
Remove the 
screws holding the main Circuit Board, also the four holding the mains 
transformer, and the one in the corner by the Line out plugs. Last remove the 
clips by the 'Open' button.
Unplug the two PCB connectors by the display, now 
the entire Main Circuit Board, can be easily removed from the 
assembly.
Remove the crystal unit marked '11,2896' it is a shiny metal can 
part, found some 10 cm. (4 inches) from the line out plugs.
Also remove the 
two surface mounted capacitors connected to the crystal unit on the Solder side. 
(There are only the two in question). 
Surface Mounted Devices, and best 
removed by alternating the Soldering iron, in order to keep both ends melted. 
Then You can push the component away from the copper pad, and then pick it up 
with at tweezer.
Connect LClock Out (Red twisted wire) to the pcb solder pad 
of the crystal unit, closest to the CD transport .
Connect LClock Gnd (Blue 
twisted wire) to the wire link at the 'foot end' of SAA7220, closest to the 
crystal unit.
Connect LClock +12V (Red single wire) to the 33 Ohms resistor 
(orange orange black gold) found very close to the Line Out plugs. Use the 
terminal closest to the CD transport.

Rega Planet I TOP I



Clock Frequency
16,9344 MHz

Converter type
Burr Brown PCM 
1710U

Remove the screws on the 
bottom of the player, and lift the top part gently away from the bottom. Be 
careful the tre wires to the lid switch dont come off, they are soldered 
directly to the PC Board. Shoul it happen, the red wire goes to +5V, the Black 
to Gnd and the Green wire to SIG.
Carefully remove the flex cable to the CD 
transport from the socket. Remove screws holding the Main Board, remember the 
one in the corner by the mains transformer.
Remove Crystal unit X7, and the 
two capacitors marked C2 ( ...? ).
Connect LClock Out (Red twisted wire) to 
the pcb solder pad of X7 closest the front of the CD player 
enclosure.
Connect LClock Gnd (Blue twisted wire) to the pcb solder pad of C2 
closest to the mains transformer.
Connect LClock +12V (Red single wire) to + 
on LClock XO Power Supply (Required).
Remember to also connect LClock ground 
to the XO power supply. Best taken from the minus of the 10.000 uF Capacitor. 

Rotel RCD-945AX 
I TOP I



Clock Frequency
16,9344 MHz

Converter type
Philips SAA7341GP T

Opamps.
NE 5532

Opamp Replacements
2 pcs. AD825 module Type 
1

Remove the top cover, by 
unscrewing screws under and at the rear of the enclosure. Also remove the 
bacpanel of the enclosure. Loosen the main board by removing all the screws you 
can see, looking down on the board, and also the three shiny screws on the 
bottom of the enclosure. They hold the CD transport. One of these screws is 
located under one of the left side rubber feet. 
The main board is now gently 
lifted out of the CD player. 
Remove the Crystal unit X101, it sits about 20 
cm. (8 inches) behind the frontpanel some 10 cm. (4 inches) from the right 
sidepanel.
Remove C315, C316 and C317, sitting right next to the 
crystal.
Connect LClock Out (Red twisted wire) to the X101 solder pad, 
closest to the Back Panel.
Connect LClock Gnd (Blue twiated wire) to the 
solder pad of C315, closest to the front panel.
Connect LClock +12 V (Red 
single wire) to U104, it is a 78M15 regulator, located behind the CD transport. 
Connect to the right hand (output) pin ( when you read the '78M15' text 
correctly ). 

Rotel RCD-965BX 
I TOP I



Frequency
11,2896 MHz

Converter type
Philips SAA7323GP 
T

Remove the top cover, by 
unscrewing screws on side and rear of the enclosure. Unplug PCB wire connectors 
with grey flat-cable, flying across the main board. If You have the discrete 
analog extension, this also has to be taken out of the machine.
Loosen the 
main board by removing all the screws you can see, looking down on the board, 
and also the three black screws on the bottom of the enclosure. They hold the CD 
transport. One of these screws is located under one of the left side rubber 
feet. 
The main board is now gently lifted out of the CD player. 
Remove 
the Crystal unit X102, it sits about 8 cm. behind the frontpanel some 10 cm. 
from the right sidepanel.
Remove C189 and C190, sitting right next to the 
crystal.
Connect LClock Out (Red twisted wire) to the X102 solder pad, 
closest to the CD transport.
Connect LClock Gnd (Blue twiated wire) to the 
solder pad of C190, closest to the front panel.
Connect LClock +12 V (Red 
single wire) to U120, it is a 78M12 regulator, located behind the CD transport. 
Connect to the right hand (output) pin ( when you read the '78M12' text 
correctly ). 
Remember to replug the flatcable in the PCB connector, the 
connector next to A103 is offset to the right hand side.

Rotel RCD-970BX 
I TOP I



Clock Frequency
11,2896 MHz

Converter type
Philips TDA 1305 
T

The Crystal unit is mounted 
in a rubberbox, on the converter PC Board approximately midway on the PC Board, 
a couple of centimeters towards the frontpanel. We recommend NOT using the 
rubber box, when fitting LClock. The Converter PC Board is taken out, by 
Removing the screws in each corner, and a screw holding the RCA LINE OUT plugs. 
Furthermore the metal screen, on the rear panel, is unsoldered from the RCA 
plugs. Take the converter PC Board carefully out of the chassis, remove the 
Crystal unit ( X301 ). Remove C323 and C324, they are placed right next to the 
Crystal unit.
Cut pin 4 on U307 ( 74HCU04 ), 
Connect LClock Out (Red 
twisted wire) to pin 1 of this IC.
Connect LClock Ground (Blue twisted wire) 
to pin 7 of U307 ( 74HCU04 ).
+12V to LClock (Red single wire) is soldered to 
J153, it is placed on the other PC Board, next to the heat sink.
As an extra 
modification, we can recommend changing the two AD711 in the analog stage, to 
AD825 type 4.
 



 
 
 

 

Rotel RCD-971 I TOP I



Clock Frequency
16,9344 MHz

Converter type
2 pcs. Burr Brown 
PCM63/HDCD
 



 




Remove top- and bottom cover by unscrewing the (many) 
screws.
The Crystal unit is placed in a rubberbox, on the main PC Board right 
hand side near the front plate. Remove the Crystal unit ( X631 ).
Short 
circuit C634 as shown on the photograph. Also break the two PCB traces as shown 
on the photo, use Your Dremel or a sharp knife. (Caution!). Short R635 to R634 
as shown with the short red wire.
 



 
Connect LClock XO Out (Red twisted wire) 
to R634, the end closest to the front plate.
Connect LClock XO Ground (Blue 
twisted wire) to The PCB GND plane at pin 7-8 of U611, top side of the 
PCB.
Connect +12V (Single red wire) to T983, use the pin closest to the front 
plate. 


 



 

Careful not to short other pins with 
solder.
You can tune this machine to true high-end performance by changing 
the OPA2604's to AD825 modules (type 3, 2 pcs.) And also bypass the DC blocking 
Caps (C717 and C718) with a 100n PP (i.e. EVOX-RIFA) and a good quality 100 Ohm 
resistor directly to the output plug. Never connect two caps directly in 
parallel because of the current resonance problem. 
 

 
 
 
 



 

Rotel RCD-975 I TOP I



Clock Frequency
11,2896 MHz

Converter type
2 pcs. Philips 
TDA1305T

The Crystal unit is 
placed in a gummibox, on the converter PC Board approximately midways on the PC 
Board, a couple of centimeters towards the frontpanel. We recommend you dont 
reuse this rubberthing when installing LClock. The Converter PC Board is 
loosened, by Removing the screws in each corner, and a screw holding the RCA 
LINE-Out plugs.
Furthermore the metal screen on the rear side, is unsoldered 
from the RCA plugs.
Take the converter PC Board carefully out of the chassis, 
remove the Crystal unit ( X301 ). Remove C323 and C324, they are placed right 
next to the Crystal unit.
Cut pin 4 on U307 ( 74HCU04 ), Connect LClock Out 
(Red twisted wire) to pin 1 of this IC.
Connect LClock Ground (Blue twisted 
wire) to pin 7 of U307 ( 74HCU04 ).
+12V to LClock (Red single wire) is taken 
from J153, placed on the other PC Board, right next to the heat sink.
As an 
extra modification, we can recommend changing the two AD711 in the analog stage, 
to LT1122.

Rotel RCD-991 I TOP I



Clock Frequency
16,9344 MHz

Converter type
2 pcs. Burr Brown 
PCM63/HDCD

Remove top- and 
bottom cover by unscrewing the (many) screws. The Crystal unit is placed in a 
rubberbox, on the main PC Board right hand side near the front plate. Remove the 
Crystal unit ( X201 ). Remove C211 and C212, found right next to the Crystal 
Unit. Short C212 with a wirebit.
Cut pins 2, 8 and 12 of U206 
(74HCU04).
Connect R223, the terminal closest to the CD transport to R204, 
the terminal away from the CD transport, and finally pin 11 on U204, using a 
short wire.
Connect LClock XO Out (Red twisted wire) to R223, the terminal 
closest to the CD transport.
Connect LClock XO Ground (Blue twisted wire) to 
pin 7 of U206.
Connect +12V (Single red wire) to + terminal on C909, one of 
the large 4700 uF electrolytic capacitors.

SONY CDP497 I TOP I



Clock Frequency
22,5792 MHz

Converter type
SONY CXD 
2561

The 
Crystal unit X327 is placed approximately on the middle of the Main Board. 
Remove this Crystal unit, along with C325 and C326, located right next to the 
crystal.
Connect LClock Out (Red twisted wire) to the PCB solder pad of the 
Crystal unit, closest to the rear panel.
Connect LClock Gnd (Blue twisted 
wire) to the PCB solder pad of C326, closest to the rear panel.
Connect 
LClock +12V (Red single wire) to JW61, approximately 5 cm in front of the mains 
transformer.

SONY X7ESD I TOP I



Clock Frequency
16,9344 MHz

Converter type
Burr Brown PCM 
58

The Crystal unit is placed 
under the bottom cover, remove the bottom cover of the CD enclosure, and gently 
take out the PC Board in the CD player enclosure's right hand side. You have to 
unscrew the 6 screws holding it.
The Crystal unit is designated X401, remove 
it from the PC Board. Connect pin 13 and 14 on the nearby IC 74HCU04.
Remove 
the resistor with designator 'OSC', Connect LClock Out (Red twisted wire) to the 
PCB solder pad of the 'osc' resistor closest to the 74HCU04.
Connect LClock 
Gnd (Blue twisted wire) to pin 7 of IC'a 74HCU04.
Connect LClock +12V (Red 
single wire) to IC416, left PCB solder pad, (input), when you read the '7805' 
text correctly.

SONY CDP-X229 
ES I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 2562 
Q

Remove the top cover of the 
CD player enclosure, by Removing the four topscrews and the four 
sidescrews.
The Crystal unit is easily located, about 6 cm. behind the RCA 
LINE OUT plugs. Unscrew the 4 screws, holding the Main Board, and also the two 
screws, holding the LINE plugs on the rear panel. Squeeze the two plastic 
fasteners carefully, so the Main Board can be gently lifted out of the CD player 
enclosure.
Pull the two flexcables gently out of their sockets, and flip the 
PC Board towards the rear panel.
Remove the Crystal unit X331, and the two 
capacitors C320 and C321.
Connect LClock Out (Red twisted wire) to the pcb 
solder pad of X331, closest to the rear panel.
Connect LClock Gnd (Blue 
twisted wire) to the pcb solder pad of C321, furthest away from the CD 
transport.
Connect LClock +12 V (Red single wire) to JW112, it is a wire 
jumper, placed right next to the largest electrolytic capacitor on the PC Board, 
by the rear panel.
Remember to replug the two flex cables!

SONY CDP-X303 
ES I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 2562 Q

Opamps type
JRC5532

Opamp Replacements
AD825 type 1, 6 
pcs.

Remove the top cover of 
the CD player enclosure, by Removing the four topscrews and the four 
sidescrews.
The Crystal unit is easily located, on the middle of the D/A 
Circuit Board in the right side of the CD player.
It is a relatively small 
crystal unit, wound in black textile tape. Actually there are two crystals on 
this board, but only the one on the middle of the board is to be removed. The 
one by the front plate should stay in the circuit.
Loosen the D/A Circuit 
Board by removing the three screws on each side. Gently tilt it out of the 
enclosure, in order to access the solder side.
Remove the crystal unit 'X621' 
and short circuit C621, right next to the crystal unit, now removed.
Remove 
L622, found a little towards the front plate.
Connect LClock Out (Red twisted 
wire) to the pcb solder pad of L622, closest to the front panel.
Connect 
LClock Gnd (Blue twisted wire) to the pcb solder pad of C621, any pin (You just 
shorted it, did'nt You?).
Connect LClock +12 V (Red single wire) to IC901, in 
the Power Supply, use the pin closest to the CD transport.

SONY CDP-X505 
ES I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 2562 
Q

Remove the top cover of the 
CD player enclosure, by Removing the four topscrews and the four 
sidescrews.
The Crystal unit is easily located, on the middle of the D/A 
Circuit Board in the right side of the CD player.
It is a relatively small 
crystal unit, wound in black textile tape. It is sitting some 3 cm. (1 inch) 
closer to the CD transport, than the big electrolytic Capacitor. Actually there 
are two crystals on this board, but only the one on the middle of the board is 
to be removed. The one by the front plate should stay in the circuit.
Loosen 
the D/A Circuit Board by removing the three screws on each side. Gently tilt it 
out of the enclosure, in order to access the solder side.
Remove the crystal 
unit 'X602' and the companion caps C627 and C628, right next to the crystal 
unit, now removed.
Connect LClock Out (Red twisted wire) to the pcb solder 
pad of X602, closest to the front panel.
Connect LClock Gnd (Blue twisted 
wire) to the pcb solder pad of C627, furthes away from the CD 
transport.
Connect LClock +12 V (Red single wire) to IC405, pin 7.

SONY 
X777ES I TOP I



Clock Frequency
45,158 MHz

Converter type
2 pcs. Sony CXD2552 
BQ

Remove the top cover by 
unscrewing the 6 screws on the top of the CD player enclosure. Also remove the 
bottom plate, by unscrewing the screws.
The Crystal unit is placed on the 
converter PC Board, youll find it on the bottom right hand side of the CD player 
enclosure. The Crystal unit is placed on the middle in the end of the PC Board 
closest to the frontpanel. It is a rather small Crystal, wrapped with black 
textile tape. 
Remove the converter PC Board by unscrewing the three screws 
on each longside of the PC Board.
Remove carefully the Crystal unit X601, and 
the capacitors C631 and C632, placed right next to the Crystal unit.
Connect 
LClock Out (Red twisted wire) to the X601 PCB solder pad on the converter Board, 
closest to the CD player rear panel.
Connect LClock Gnd (Blue twisted wire) 
to the PCB solder pad of C632, closest to the rear panel of the CD player 
enclosure.
Connect LClock +12V (Red single wire) on the closest (to LClock) 
corner of the power supply PC Board. There is two thick red wires going from the 
correct terminal on the solder side. On the component side there is a '+15V' 
mark.

SONY X779ES I TOP I



Clock Frequency
45,158 MHz

Converter type
2 stk. Sony 
CXD2562

This instruction also 
applies to a great deal other SONY machines from 1991 to 1996.
Remove the top 
cover by unscrewing the 6 screws on the top cover of the CD player 
enclosure.
The Crystal unit is placed on the converter PC Board on right hand 
side of the CD player enclosure. It is a rather small Crystal unit, wrapped in 
black textile tape, you will find it approximately 3 cm. towards the fronpanel 
starting by the two large electrolytic capacitors on the middle of the PC Board. 
Actually there is two Crystal units on this PC Board, the other one sitting at 
the front panel, is used to recreate a nice 16,9 MHz clock to control the CD 
transport, but we dont want to tamper with this crystal in the LClock upgrade. 
(The slave 16.9 MHz is derived from the precise LClock'ed 45.158 MHz divided by 
3).
Remove the converter PC Board by unscrewing the three screws on each side 
of the Board.
Carefully unplug the PCB connectors on half of the PC Board, 
closest to the front panel. You dont have to worry about the refitting of these 
plugs, they only fit together in one way, the right one! Also remove the black 
ground wire, screwed right next to the crystal unit.
Remove carefully the 
Crystal unit X602, and the capacitors C613 and C614, sitting next to the Crystal 
unit.
Connect LClock Out (Red twisted wire) to the X602 solder pad on the 
converter PC Board, furthest away from the CD transport.
Connect LClock Gnd 
(Blue twisted wire) to the PCB solder pad of C614, closest to the 
frontpanel.
Connect LClock +12V (Red single wire) to IC416, left PCB solder 
pad, when you can read the text on the component correctly.

SONY CDP-XA 5 
ES I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 2562Q / CXA 8042AS

Opamp type
NE5532 / AD712

Opamp Replacements.
Type 1, totally 4 
pcs.

Remove the top cover, by 
unscrewing the 6 black screws on the top. Remove the right hand sidepanel, by 
unscrewing the four screws on the outside, and three internally.
The Crystal 
unit is placed on the PC Board in the right hand side approximately board 
midpoint. Remove the PC Board from the CD player enclosures right hand 
side.
The Crystal unit has the designator X602, remove it, along with the two 
capacitors C611 and C612
Remove the SMD IC IC604, it is placed right beneath 
the Crystal unit, on the solder side. Short circuit pins 6 and 7 of IC604 with a 
solder bubble.
Connect LClock Out (Red twisted wire) to X602, the PCB solder 
pad closest to the PC Boards right hand edge, when you have a front panel 
view.
Connect LClock Gnd (Blue twisted wire) to C611, the PCB solder pad 
closest to the PC Boards right hand edge, when you have a front panel 
view.
Connect LClock +12V (Red single wire) to JW632, it is a wire jumper, 
placed between the two large electrolytic cans on the PC Board.

SONY 
CDP-XA30ES I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 2562Q / CXA 
8042AS
 

 



Remove the top cover, by unscrewing the 4 black screws on the 
top, and the 2 on each side. 
Remove the supporting metal bar, going from front to rear 
panels. 
Done by unscrewing the 2 
screws by the front and rear.

Drill holes for the LClock XO in this bar, with a distance of 66 
mm. (2.60 inch). 
 



 

This way the XO Clock will hang head down, in the right position 
to feed clock signals into the CD player. The original crystal unit 'X321' is to 
be found, about midways on the right hand side of the main Circuit 
Board.
Remove X321, along with its companoin capacitors C323 and C324. 
Connect LClock Out (Red twisted wire) to C323, the PCB solder pad closest to the 
CD transport.
Connect LClock Gnd (Blue twisted wire) to C323, the other PCB 
solder pad.
Connect LClock +12V (Red single wire) to JW632, it is a wire 
jumper, placed between the two large electrolytic cans on the PC 
Board.
 

 

SONY CDP-XA 50 ES I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 2562Q / CXA 8042AS

Opamp type
OPA 2604 / OPA 2132

Opamp Replacements
Type 1, totally 4 
pcs.

Remove the top cover, by 
unscrewing the 6 black screws on the top. Remove the right hand sidepanel, by 
unscrewing the four screws on the outside, and three internally.
The Crystal 
unit is placed on the PC Board in the right hand side approximately board 
midpoint. Remove the PC Board from the CD player enclosures right hand 
side.
The Crystal unit has the designator X602, remove it, along with the two 
capacitors C611 and C612
Remove the SMD IC IC604, it is placed right beneath 
the Crystal unit, on the solder side. Short circuit pins 6 and 7 of IC604 with a 
solder bubble.
Connect LClock Out (Red twisted wire) to X602, the PCB solder 
pad closest to R534.
Connect LClock Gnd (Blue twisted wire) to C611, the PCB 
solder pad closest to R534.
Connect LClock +12V (Red single wire) to JW633, 
it is a wire jumper, placed between the two electrolytic cans on the rear end of 
PC Board. (C627 and C628).

SONY 
CDP-XB920 I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 8715 / CXA 
8355

Remove the top 
plate by unscrewing the 8 black screws. The original crystal unit 'X301' is to 
be found some 10 cm. (4 inches) behind the front panel, at 4 cm. (2 incehs) from 
the right hand side panel.
Loosen the Main circuit board, by taking out the 
screws holding it, and also the ones holding plugs on the rear panel.
Remove 
X301 from the Circuit board, along with its companion caps. C358 and 
C359.
Connect LClock Out (Red twisted wire) to X301, the PCB solder pad 
furthes away from the CD transport.
Connect LClock Gnd (Blue twisted wire) to 
C358, the PCB solder pad closest to the rear panel.
Connect LClock +12V (Red 
single wire) to + terminal of C905, one of the big electrolytic cans on the rear 
end of PC Board.

SONY 
CDP-XE900 I TOP I



Clock Frequency
45,158 MHz

Converter type
Sony CXD 8505 / CXA 
8055

Remove the top cover, by 
unscrewing the 8 black screws. The Crystal unit is placed on the main PC Board 
approximately 10 cm. behind the frontpanel, and 4 cm. off the PC Boards right 
hand edge. Take the PC Board in the CD player enclosures right hand side 
out.
The Crystal unit has designator X301, remove it from the PC 
Board.
Remove C358 and C359, you will find them right next to the Crystal 
unit.
Connect LClock Out (Red twisted wire) to X301, the PCB solder pad 
closest to the PC Boards right hand edge, when you hav a front view.
Connect 
LClock Gnd (Blue twisted wire) to C358, the PCB solder pad closest to the PC 
Boards right hand edge.
Connect LClock +12V (Red single wire) to JW352, it is 
a wire jumper, placed on the opposite side of the PC Board, approximately 7 cm. 
off the rear panel.

Sugden 
Optima I TOP I



Clock Frequency
11,2896 MHz

Converter type
Philips TDA1543

Opamps type
AD845

Opamp replacements
AD825 type 
4

Remove the top plate.
The 
original crystal unit '1211' is to be found on the mid Circuit Board, some 6 cm 
(2 inches) behind the front panel, and in front of the main processor 
module.
Remove Crystal 1211, and the two capacitors placed right next to 
it.
Connect LClock Out (Red twisted wire) to 1211, the PCB solder pad 
furthest away from the CD transport.
Connect LClock Gnd (Blue twisted wire) 
to the PCF2705 IC, pin 8.
Connect LClock +12V (Red single wire) to terminal 
+VM, on the opposite side of the same PC Board.

TEAC VRDS 10 I TOP I



Clock Frequency
16,9344 MHz

Converter type
2 pcs. Philips TDA1547 (DAC 
7)

The original Crystal 'X51' 
is placed on the rightmost side of the cabinet, about 15 cm. (6 inches) behind 
the front panel. Remove X51, and its companion capacitors C51 and C55 (orange 
trimmer cap).
Connect LClock Out (Red twisted wire) to the solder pad from 
X51, closest to middle of the Circuit Board.
Connect LClock Gnd (Blue twisted 
wire) to the solder pad from C51, closest to the edge of the Circuit Board 
.
Connect LClock +12 (single red wire) to W221, a wire-link placed on the 
opposite side of the circuit board, from the crystal.
Check here for more upgrades to the 
VRDS10.


TEAC VRDS 25 I TOP I



Clock Frequency
18,432 MHz

Converter type
4 stk. AD 1862 J-grade

Opamps type
NJM 2114 / M5238

Opamp Replacements
AD825 Type 2, totally 8 
pcs.

This CD player appears to 
be built just right, using all the best parts and techniques possible. However 
there are great sound improvements to obtain, by performing the suggested 
upgrades.
Remove left top cover. Loosen the Circuit board found inside, by 
unscrewing the screws that hold it down, amd also the ones holding the Audio 
Plugs to the rear panel.
Short Circuit C101 (some 4 cm - 1,5 inch behind the 
AD1893 IC).
Cut L107 off the Circuit Board.
Connect LClock Out (Red 
twisted wire) to the solder pad from L107, closest to middle of the Circuit 
Board.
Connect LClock Gnd (Blue twisted wire) to the IC U105 (74HCU04), pin 
7.
Connect LClock +12 (single red wire) to Cathode of D101, (The terminal 
with a marking band) D101 is found right behind the XLR outputs.

Technics 
SL-PS620A I TOP I



Clock Frequency
33,8688 MHz

Converter type
Technics 
MASH

The Crystal unit X801 is 
placed approximately 15 cm. behind the frontpanel, in the right hand side of the 
enclosure. Loosen the rear panel, by Removing the three screws along the edge. 
Remove screws holding right hand PC Board marked 'AUDIO'.
The Main Board is 
taken carefully out of the chassis.
Remove X801, C818 and C819. One of the 
PCB solder pads of X801 ( the one closest to the edge of the PC Board ) is 
connected to LClock Out. (Red twisted wire).
One of the PCB solder pads of 
C818 (the one closest to the front panel) is connected to LClock Gnd. (Blue 
twisted wire).
+12V (red single wire) is soldered to J34, placed next to the 
optical out unit TX174.

Technics 
SL-PS840 I TOP I



Clock Frequency
33,8688 MHz

Converter type
Technics 
MASH

The Crystal unit X801 is 
placed approximately 10 cm. behind the frontpanel, off the right hand side. The 
Main Board is loosened, and taken carefully out of the chassis.
Remove X801, 
C835 and C836.
One of the PCB solder pads of X801 ( the one closest to the 
middle of the PC Board ) is connected to LClock Out. (Red twisted wire) 
One 
of the PCB solder pads of C836 (the one closest to the edge of the PC Board) is 
connected to LClock Gnd. (Blue twisted wire).
+12V (red single wire) is 
soldered to J323, placed on opposite corner of where the Crystal unit was 
mounted on the PC Board. 

Thule Spirit I TOP I



Clock Frequency
16,9344 MHz

Converter type
BB PCM 1715U Low Cost V. Out 
DAC

Remove the top cover, Remove the screw holding the converter 
PC Board, use a Torx T10 screwdriver. Remove the screw holding the RCA Line Out 
plugs. Remove the screw holding the ground wire.
Remove the oscillator X1 
(The designator is printed underneath the component...). It is a rectangular 
shiny metalcan of approximately 12 by 20 m.m. placed on the converter PC 
Board.
Connect LClock Out (Red twisted wire) to the pcb solder pad 'pin 9' on 
X1.
Connect LClock Gnd (Blue twisted wire) to the pcb solder pad 'pin 8' on 
X1.
Connect LClock +12V (Red single wire) to LClock XO Power Supply + 
(Required for this model).
Remember to also connect LClock ground to the XO 
power supply. Best taken from the minus of the 10.000 uF Capacitor.
Yamaha CDX-580, 880,590, 
890, 593, 893 I TOP 
I




Clock Frequency
16,9344 MHz

Converter type
YAC 514

Begin with removing the top cover, and 
next taking the main Circuit board out of the cabinet.
The D/A Converter chip 
(Yamaha YAC 517) is placed on the solder side of the circuit board, right 
corner, as seen from the front panel side.
Remove the crystal unit XL2, 
placed right next to the D/A Converter chip.
Also remove the two cap's C52 
and C53, located next to the crystal.
Connect LClock Out (Red twisted wire) 
to the solder pad from XL2, closest to the D/A chip and C53.
Connect LClock 
Gnd (Blue twisted wire) to the solder pad from C53 furtest away from the 
crystal.
Connect LClock +12 (single red wire) to LClock XO Supply + (Required 
for this model).
Remember to also connect LClock ground to the XO power 
supply. Best taken from the minus of the 10.000 uF Capacitor