Sony CDP-XB820 User manual

MICROFILM
SERVICE MANUAL
COMPACT DISC PLAYER
AEP Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM36-14E
Base Unit Type BU-14E
Optical Pick-up Type KSS-213B/F-NP
SPECIFICATIONS
CDP-XB820
– Continued on next page –

– 2 –
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 3
2. GENERAL ................................................................... 6
3. DISASSEMBLY ......................................................... 7
4. TEST MODE
4-1. AF ADJ Mode ................................................................. 9
4-2. ADJ Mode ....................................................................... 10
4-3. CLV-S Mode.................................................................... 10
4-4. AGING Mode.................................................................. 11
5. ELECTRICAL BLOCK CHECKING ................ 12
6. DIAGRAMS
6-1. IC Pin Function Description ........................................... 14
6-2. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 16
6-3. Printed Wiring Board – BD Section – ............................ 19
6-4. Schematic Diagram – BD Section – ............................... 21
6-5. Printed Wiring Boards
– OPTICAL PICK-UP/MOTOR Section – .................... 23
6-6. Schematic Diagram
– OPTICAL PICK-UP/MOTOR Section – .................... 24
6-7. Printed Wiring Board – MAIN Section – ....................... 25
6-8. Schematic Diagram – MAIN Section (1/2) –................. 27
6-9. Schematic Diagram – MAIN Section (2/2) –................. 29
6-10. Printed Wiring Boards – POWER Section – .................. 31
6-11. Schematic Diagram – POWER Section – ...................... 33
6-12. Printed Wiring Boards – PANEL Section – ................... 35
6-13. Schematic Diagram – PANEL Section – ........................ 37
7. EXPLODED VIEWS................................................ 42
8. ELECTRICAL PARTS LIST ............................... 46
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINE WITH MARK !ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

– 3 –
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
HOW TO OPEN THE DISC TRAY WHEN POWER
SWITCH TURNS OFF
Insert a tapering driver into the aperture of he unit bottom, and
turn in the direction of arrow (to OUT direction).
DISC REMOVAL PROCEDURE (at POWER OFF)
1. Remove the case. (Refer to page 7.)
2. Push the slide cam in the direction of the arrow A.
3. Draw out the loading panel in the direction of the arrow Bby
hand, and remove a disk.
slide cam
loading panel
A
”B

– 4 –
CD-TEXTTEST DISC
This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display.
To check, perform the following procedure.
Checking Method:
1. Turn ON the power, set the disc to the disc table with the “test disc” label facing up, and chuck the disc.
2. Press the ·button and play back the disc.
3. The following will be displayed on the fluorescent indicator tube.
Display : 1KHZ 0DB
4. Rotating [AMS] knob, select the track. The text data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data Contents” and “Table 2 : CD-
TEXT TEST DISC Recorded Contents and Display”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For
details, refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.
Table 1 : CD-TEXTTEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)
1 1kHz/0dB/L&R 22 1kHz/-90dB/L&R
2 20Hz/0dB/L&R 23 Infinity Zero w/o emphasis//L&R
3 40Hz/0dB/L&R 24 Infinity Zero with emphasis//L&R
4 100Hz/0dB/L&R 25 400Hz+7kHz(4:1)/0dB/L&R
5 200Hz/0dB/L&R 26 400Hz+7kHz(4:1)/-10dB/L&R
6 500Hz/0dB/L&R 27 19kHz+20kHz(1:1)/0dB/L&R
7 1kHz/0dB/L&R 28 19kHz+20kHz(1:1)/-10dB/L&R
8 5kHz/0dB/L&R 29 100Hz/0dB/L*
9 7kHz/0dB/L&R 30 1kHz/0dB/L*
10 10kHz/0dB/L&R 31 10kHz/0dB/L*
11 16kHz/0dB/L&R 32 20kHz/0dB/L*
12 18kHz/0dB/L&R 33 100Hz/0dB/R*
13 20kHz/0dB/L&R 34 1kHz/0dB/R*
14 1kHz/0dB/L&R 35 10kHz/0dB/R*
15 1kHz/-1dB/L&R 36 20kHz/0dB/R*
16 1kHz/-3dB/L&R 37 100Hz Squer Wave//L&R
17 1kHz/-6dB/L&R 38 1kHz Squer Wave//L&R
18 1kHz/-10dB/L&R 39 1kHz w/emphasis/-0.37dB/L&R
19 1kHz/-20dB/L&R 40 5kHz w/emphasis/-4.53dB/L&R
20 1kHz/-60dB/L&R 41 16kHz w/emphasis/-9.04dB/L&R
21 1kHz/-80dB/L&R
TRACK
No. Displayed Contents
NOTE: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.
TRACK
No. Displayed Contents
±
≠

– 5 –
to
Table 2: CD-TEXTTEST DISC Recorded Contents and Display
(In this unit, some special characters cannot be displayed. This is no a fault.)
TRACK
No. Recorded contents
´
′
*
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
to
99
! ” # $%& ´ (21h to 27h)1kHz 0dB L&R
( ) + , – . / (28h to 2Fh)
01234567 (30h to 37Fh)
8 9 : ; < = > ? (38h to 3Fh)
@A B CD E F G (40h to 47Fh)
H I J K L MNO (48h to 4Fh)
P QR S T U VW (50h to 57Fh)
X Y Z [ ¥ ] ^ _ (58h to 5Fh)
a b c d e f g (60h to 67Fh)
h i j k l m n o (68h to 6Fh)
p q r s t u v w (70h to 77Fh)
xyz{I} (78h to 7Fh)
i¢£¤¥ § (A0h to A7h) 8859-1
≥Cª¬PR–(A8h to AFh)
•±23 µ¶ • (B0h to B7h)
†1º ¿ (B8h to BFh)
ÀÁÂÃÄÅÆÇ (C0h to C7Fh)
ÈÉÊËÌÍÎÏ (C8h to CFh)
DÑÒÓÔÕÖ (D0h to D7Fh)
ØÙÚÛÜY ß (D8h to DFh)
àáâãäåæç (E0h to E7Fh)
èéêëìíîï (E8h to FFh)
∂ñòóôõö÷(F0h to F7Fh)
øùúûüy ÿ (F8h to FFFh)
No.66
No.67
to
No.99
˙
~
′
1
41 23 4
Display

– 6 –
SECTION 2
GENERAL
• LOCATION OF CONTROLS
1 432 5 6 789 0 !¡!™
!£ !¢ !∞!§!¶ !• !ª @º @¡ @™ @£@¢ @∞
1U(power) button
2PLAY MODE button
3REPEAT button
4FADER button
5TIME TEXT button
6Remote sensor
70button
8)button
9EDIT/TIME FADER button
0CHECK button
!¡ CLEAR button
!™ Fluorescent indicator tube
!£ PHONES jack
!¢ PHONE LEVEL knob
!∞ FILTER knob
!§ PEAK SEARCH button
!¶ AUTO SPACE button
!• MUSIC SCAN button
!ª LANGUAGE button
@º Disc tray
@¡ §OPEN/CLOSE button
@™ ·button
@£ Pbutton
@¢ pbutton
@∞ ≠AMS ±, PUSH ENTER knob

– 7 –
CASE
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
FRONT PANEL SECTION
2 two screws
(case 3TP2)
2 two screws
(case 3TP2)
3 case
1 two screws
(BV/RING)
2 two screws
(case 3TP2)
3 loading panel ass’y
2 two claws
A
1
Push the slide cam
in the direction of the arrow
A .
4 connector
(CN903)
5 connector
(CN351)
6 flat wire (25 core
)
(CN302)
8 claw
7 five screws
(BV3
× 8)
9 front panel section
8 claw

– 8 –
MECHANISM DECK (CDM36-14E)
MAIN BOARD

3
lug
2 screw
(BVTP3
× 8)
4 two screws
(BVTP3
× 8)
4 two screws
(BVTP3
× 8)
5 mechanism dec
k
(CDM36-14E)
1 flat wire (23 core)
(CN301)
1 flat wire (23 core)
(CN301)
4 two screws
(BVTP 3
× 8)
5 main board
3 four screws
(BV/RING)
2 connector
(CN951)
4 two screws
(BVTP 3
× 8)

– 9 –
When the pbutton is pressed, the following will be displayed.
(partial lighting 2)
When the OPEN/CLOSE §button is pressed, all will light up
again.
When the ≠AMS ±knob is rotated, the following
will be displayed. (partial lighting 3)
• Key check
All buttons have corresponding button numbers. When a button is
pressed, the counter will count up and display the button’s num-
ber. However, the counter will only count to “18”. It will not count
forbuttonsalreadypressed once, butwill display the button’snum-
ber.
SECTION 4
TEST MODE
4-1. AF ADJ MODE
The following checks can be performed in theAFADJ mode, which
is set by connecting the TP2 (AF ADJ : JW96) terminal on MAIN
board to the Ground and turning on the power.
• FL tube check
After all segments light up, when the ·button is pressed, the
following will be displayed. (Partial lighting 1)
(Partial lighting 3)
(Partial lighting 2)
(Partial lighting 1)
“FILTER-STD/1/2/3” is displayed on the FL tube when the
FILTER switch is pressed.
• Remote commander check
“REMOCON PLAY” is displayed on the FL tube when the PLAY
button on the remote commander is pressed.
All go off when the other buttons a pressed.
• Audio check
• Initial setting of digital filter and release of mute.
• Whenthe TP2 (AFADJ)terminal onMAIN board is set to HIGH
(VDD), emphasis turns on. When set to LOW (GND), it turns
off.
24
6810
12 14
16 18 20
Â
Display of counting
Â
Display of button number
Rightward:
Lefrward:
Button Button Number or Display
LANGUAGE 0
MUSIC SCAN 1
AUTO SPACE 2
PEAK SEARCH 3
PLAY MODE 4
REPEAT 5
FADER 6
TIME/TEXT 7
08
)9
EDIT/TIME FADE 10
CHECK 11
CLEAR 12
P18
PUSH ENTER 20
OPEN/CLOSE §All lit
PLAY ·Partial lighting 1
STOP pPartial lighting 2
≠AMS ±Partial lighting 3
Buttons and Corresponding Button Numbers

– 10 –
4-2. ADJ MODE
The following operations are performed in the ADJ mode, which
is set by connecting the TP1 (ADJ : JW98) terminal to the Ground
and turning on the power.
• During playback, there is no problem even if the GFS is continu-
ously LOW.
• High speed search is prohibited during access.
• During playback, the gain of focus servo and spindle servo does
not decrease.
• Servo related manual operations and measurement can be
performed.
(For details of operations, refer to Table of Key Operrations in
ADJ Mode.)
4-3. CLV-S MODE
The spindle servo for playback sets into the CLV-S mode when
the TP2 (AFADJ) terminal is connected to Ground after turning on
the power.
TABLE OF BUTTON OPERATIONS IN ADJ MODE
The jitter value display mode can be set after the all-music
remaining number mode using the [TIME/TEXT] button.
The functions of the number buttons are shown in the following
table.
FUNCTIONS OF NUMBER BUTTONS
(With the attached remote commander)
[ MAIN BOARD ] – Conductor Side –
Button Function
1 Focus bias up
2 Focus bias aliasing (upper, middle, lower) display
3 Focus bias (best point, jitter value) display
4 Tracking servo, sled servo off
5 Tracking gain up
6 Focus bias down
7 Focus bias readjustment
8 Focus bias 00 point
9 Tracking servo, sled servo on
10 Tracking gain normal
11 S-Curve mode (play mode only)
12 Eccentric mode
13
14 Reserved for BD
15
16
17 Tracking gain initialize
18 Offset display (TE), EF, Bias
19 Offset display (VC, FE, RF)
20 Auto gain (FCS, TRK)
CLR key (Error Rate, RFCK, GFS) selection
IC930 JW096
TP2
(AFADJ)
TP1
(ADJ)
JW098
IC302
CN302

– 11 –
4-4. AGING MODE
1. How to Enter AGING Mode
Aging method 1
(When usingthe aging mode remotecontroller(J-2501-123-A)):
1) Pess the Ubutton and turn ON the power.
2) Set the disc on the tray.
3) Press the [AGINGSTART] button of the aging remote control-
ler.
4) Aging starts and the message shown in Fig. 1 is displayed on the
fluorescent display tube.
5) To end, press the Ubutton.
Aging method 2 (When no aging mode remote controller):
1) Turn on the power of the set, and insert any disc.
2) Press three buttons of [MUSICSCAN], [ªOPEN/CLOSEº],
and psimultaneously, and the set goes in theAGING mode.
3) Performing the aging for a while, confirm that “ERROR” is not
displayed on the fluorescent display tube.
2. How to Exit from AGING Mode
Turn off the Power, and normal operation becomes ready.
3. Operation sequence in AGING Mode.
Fig. 1
*: In case of a failure
A faulty operation mode No. such as “ERROR-3’’ is blinking.
*: During aging, the keys on the set and the remote control A1 are
not accepted.
*: To quit the aging, turn of the power of the set.
§
Display Operation
1 AGING-0 loading IN
2 AGING-1 Toc read
3 AGING-2 last access
4 AGING-3 last play
5 AGING-4 first access
6 AGING-5 first play
7 AGING-6 loading OUT
Contents of AGING mode

– 12 –
SECTION 5
ELECTRICAL BLOCK CHECKING
Note:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S Curve Check
Connection:
Procedure :
1. Connect oscilloscope to test point TP2 (FE) on BD board.
2. Connect between test point TP3 (FEI) and TP (VC) by lead wire.
3. Turn ON the power.
4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)
5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 3±1
Vp-p.
S-curve waveform
6. After check, remove the lead wire connected in step 2.
Note : • Try to measure several times to make sure than the ratio ofA : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Connection:
Procedure :
1. Connect oscilloscope to test point TP1 (RF) on BD board.
2. Turn ON the power.
3. Put disc (YEDS-18) in to play the number five track.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note: Aclear RF signal waveform means that the shape “≈”can be clearly
distinguished at the center of the waveform.
RF signal waveform
E-F Balance (1Track Jump) Check
(Without remote commander)
Connection:
Procedure :
1. Connect oscilloscpe to test point TP4 (TE) on BD board.
2. Turn ON the power.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the “P(Pause)” button. (Becomes the 1 track jump mode)
5. Check the level B of the oscilliscope's waveform and theA (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
E-F Balance Check (With remote commander)
Connection:
Procedure :
1. Connect the test point TP1 (ADJ : JW98) on MAIN board to the
ground with a lead wire on MAIN board.
2. Connect oscilloscpe to test point TP4 (TE) on BD board.
3. Turn ON the power to set the ADJ mode.
4. Put disc (YEDS-18) in to play the number five track.
5. Press the “4” button. (The tracking servo and the sledding servo
are turned OFF.)
A
B
symmetry
within 3
± 1 Vp-p
+
–
BD board
TP2 (FE)
TP (VC)
oscilloscope
+
–
BD board
TP1 (RF)
TP (VC)
oscilloscope
VOLT/DIV: 200 m
V
TIME/DIV: 500 ns
level: 1.2
± 0.2 Vp-p
0 V
Center of the waveform
A (DC voltage
)
B
symmetry
level: 1.3 ± 0.6 Vp-p
1 track jump waveform
+
–
BD board
TP4 (TE)
TP (VC)
oscilloscope
(DC range)
+
–
BD board
TP4 (TE)
TP (VC)
oscilloscope
(DC range)

– 13 –
6. Check the level B of the oscilliscope's waveform and theA (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
7. Press the “9” button. (The tracking servo and sledding servo are
turned ON.) Confirm the C (DC voltage) is almost equal to theA
(DC voltage) is step 6.
8. Disconnect the lead wire of TP1 (ADJ : JW98) connected in
step 1.
0 V
Center of the waveform
A (DC voltage)
B
Traverse waveform
level: 1.3
± 0.6 Vp-p
Adjustment Location :
[ BD BOARD ] — Side A —
[ MAIN BOARD ] – Conductor Side –
0 V C (DC
voltage
)
Traverse waveform
Tracking servo
Sledding servo
ON
Tracking servo
Sledding servo
OFF
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (MNT1) with lead wire.
2. Turn ON the power.
3. Put the disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MHz.
    
TP9 (MNT1)
BD board frequency counte
r
+
–
TP
(VC)
TP4
(TE)
TP2
(FE) TP3
(FEI)
TP1
(RF)
IC103
IC102
IC101
TP9
(MNT1)
IC930 JW096
TP2
(AFADJ)
JW098
IC302
CN302
TP1
(ADJ)

– 14 –
6-1. IC PIN FUNCTION DESCRIPTION
SECTION 6
DIAGRAMS
•DISP BOARD IC801 CXP82832-009Q (SYSTEM CONTROLLER/FL DRIVER)
Pin No. Pin Name I/O Function
1, 2 13G, 14G O Grid drive signal output to the fluorescent indicator tube (FL801) “H”: goes on
3NC — Not used (fixed at “H”)
4+5V — Power supply terminal (+5V)
5 SCOR ISubcode sync (S0+S1) detection signal input from the CXD2585Q (IC101) in BD section
“H” active
6, 7 GND — Ground terminal
8RMIN I Sircs signal input from the remote control receiver (IC802) “L” active
9GND — Ground terminal
10, 11 OPEN O Not used (open)
12 LDOUT O Motor control signal (load out direction) output to the loading motor driver (IC302)
“H” active *1
13 LDIN OMotor control signal (load in direction) output to the loading motor driver (IC302)
“H” active *1
14 SENSE I Internal status monitor input from the CXD2585Q (IC101) in BD section
15 XLT O Serial data latch pulse output to the CXD2585Q (IC101) in BD section “L” active
16 DMUTE O Digital muting on/off control signal output to the CXD2585Q (IC101) and D/A converter (IC301)
“L”: muting on
17 PRGLT O Serial data latch pulse output to the D/A converter (IC301) “L” active
18 SENSOR IN I Stabilizer detect sensor input terminal (fixed at “L” in this set)
19 BUSOUT O Sircs remote control signal output for the CONTROL A1 “H” active
20 BUSIN I Sircs remote control signal input for the CONTROL A1 “L” active
21 SENSOR SW I Stabilizer detect sensor switch input terminal “H” active Not used (open)
22 CLK O Serial data transfer clock signal output to the CXD2585Q (IC101) in BD section “L” active
23 LDON O Laser on/off control signal output to the CXA2568M (IC103) “H”: laser on
24 DATA OSerial data output to the CXD2585Q (IC101) in BD section
25 SQCK OSubcode Q data reading clock signal output to the CXD2585Q (IC101) in BD section
“L” active
26 SUBQ ISubcode Q data input from the CXD2585Q (IC101) in BD section
27 +5V — Power supply terminal (+5V)
28 AVREF I Reference voltage (+5V) input terminal (for A/D converter)
29 KEY0 I Key input terminal (A/D input) S851 to S858 (LANGUAGE, MUSIC SCAN, AUTO SPACE,
PEAK SEARCH, PLAY MODE, REPEAT, FADER, TIME/TEXT keys input)
30 KEY1 I Key input terminal (A/D input) S801 to S805 and S810 (CLEAR, CHECK, EDIT/TIME FADE,
0, ), PUSH ENTER keys input)
31 KEY2 I Key input terminal (A/D input)
S806 to S810 (§OPEN/CLOSE, ·, P, p, ≠AMS ±keys input)
32 FILTER.SW I FILTER switch (S860) input terminal (A/D input)
33 ADJ/AFADJ I Input terminal for the CD test mode setting
“L”: ADJ mode, center voltage: AFADJ mode, normally: “H”
34 LOADSW I Loading in/out detect switch (S152 and S153) input terminal
35 MODEL.SEL1 I Destination setting terminal (fixed at “H”)
*1 Loading motor (M903) control
IN OUT BRAKE RUN IDLE
LDOUT (pin !™)“L” “H” “H” “L”
LDIN (pin !£)“H” “L” “H” “L”
Operation
Terminal

– 15 –
Pin No. Pin Name I/O Function
36 MODEL.SEL2 I Destination setting terminal (fixed at “L”)
37 AVSS — Ground terminal (for A/D converter)
38 RST ISystem reset signal input from the reset signal generator (IC930) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
39 EXTAL I Main system clock input terminal (8 MHz)
40 XTAL O Main system clock output terminal (8 MHz)
41 VSS — Ground terminal
42 TX O Sub system clock output terminal Not used (open)
43 TEX I Sub system clock input terminal Not used (fixed at “L”)
44 VDD (+5V) — Power supply terminal (+5V)
45 VFDP (–30V) — Power supply terminal (–30V) (for FL drive)
46 XSEL O Not used (open)
47 REINIT O Not used (open)
48 RFGF O Laser power hold control signal output to the CXA2568M (IC103) “H”: hold on
49 to 66 OPEN O Not used (open)
67 to 87 S21 to S1 O Segment drive signal output to the fluorescent indicator tube (FL801) “H”: goes on
88 1G O Grid drive signal output to the fluorescent indicator tube (FL801) “H”: goes on
89 VDD (+5V) — Power supply terminal (+5V)
90 to 100 2G to 12G O Grid drive signal output to the fluorescent indicator tube (FL801) “H”: goes on

– 16 –
6-2. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•5: fusible resistor.
•C: panel designation.
•U: B+ Line.
•V: B– Line.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : PLAY
• Voltages are takenwith aVOM(Inputimpedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J: CD
c: digital out
Note: The components identified by mark !or dotted line
with mark !are critical for safety.
Replace only with part number specified.
Note on PrintedWiring Boards:
•X: parts extracted from the component side.
•®:Through hole.
•b: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthepattern faceside seenfrom
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
C
BThese are omitted. E
Q
• Indication of transistor.
B
These are omitted.
CE
Q

– 17 –
• Circuit Boards Location
TRANS board
AC SW board
HP board
VC SELECT board
KEY board
SPINDLE board DISP board
MAIN board
SLED board
LOADING board
BD board

– 18 –
• Waveforms
– BD Board –
1IC103 !§ (RFO) (PLAY MODE)
500 mV/DIV, 1 µs/DIV
5IC101 ^¶ (BCLK)
2 V/DIV, 200 ns/DIV
2IC101 $¡ (TE) (PLAY MODE)
200 mV/DIV, 1 µs/DIV
3IC101 #ª (FE) (PLAY MODE)
100 mV/DIV, 500 ns/DIV
4IC101^∞ (LRCK)
2 V/DIV, 10 µs/DIV
6IC101 0(WFCK)
2 V/DIV, 100 µs/DIV
– MAIN Board –
1IC301 @• (XOUT)
2 V/DIV, 20 ns/DIV
1.2 ± 0.2 Vp-p
Approx.
570 mVp-p
Approx.
240 mVp-p
5.8 Vp-p
22.8
µ s
5.8 Vp-p
472
µ s
5.8 Vp-p
136
µ s
3.4 Vp-p
45 MHz
– DISP Board –
1IC801 #ª (EXTAL)
2 V/DIV, 50 ns/DIV
4.2 Vp-p
8 MHz
7IC101!™ (XPCK)
2 V/DIV, 100 ns/DIV
6.6 Vp-p
230 ns

CDP-XB820
– 19 – – 20 –
6-3. PRINTED WIRING BOARD – BD Section – • See page 17 for Circuit Boards Location.
• Semiconductor
Location
Ref. No. Location
D101 E-4
IC101 D-3
IC102 C-4
IC103 B-3
Q101 A-3
Q102 A-3
(Page 23)
(Page 23)
(Page 25)

CDP-XB820
6-4. SCHEMATIC DIAGRAM – BD Section – • See page 18 forWaveforms. •See page 39 and 40 for IC Block Diagrams.
– 21 – – 22 –
(Page 27)
(Page 24)
(Page 24)