Sony CDP-997 - Compact Disc Player User manual

SERVICE MANUAL
CDP-997
US Model
AEP Model
Model Name Using Similar Mechanism | CDP-597
CD Mechanism Type CDM14-5BD8A
Compact disc player
Frequency response
Signal to noise ratio
Dynamic range
Harmonic distortion
Channel separation
Outputs
LINE OUT (FIXED)
(phone jacks)
LINE OUT (VARIABLE)
(phone jacks)
DIGITAL OUTPUT
(OPTICAL)
(optical output
connector)
HEADPHONES
(stereo phone jack)
General
Power requirements
Power consumption
: ty
H
MICROFILM
Optical Pick-Up Block Type BU-5BD8A
SPECIFICATIONS
2 Hz-20 kHz +0.3 dB
More than 115 dB
More than 100 dB
Less than 0.0025%
More than 110 dB
Output level 2 V (at 50 kilohms,
non DSP mode)
Load impedance over 10 kilohms
Output level max. 2 V
(at 50 kilohms, non DSP mode)
Load impedance over 50 kilohms
Wave length 660 nm
Output level —18 dBm
Output level max. 28 mW
Load impedance 32 ohms
120 V AC, 60 Hz
17 W
Dimensions Approx. 430 x 110355 mm
(w/h/d)
(17 X 43/3 x 14 inches)
Including projecting parts and
controls
Weight Approx. 4.6 kg (9 Ibs 15 oz)
Remote commander (RM-D997)
Remote control system Infrared control
Power requirements 3 V DC with two batteries size
AA (IEC designation R6)
Dimensions Approx. 62x 18175 mm
(w/h/d)
(21/5 X 23/39 X7 inches)
Weight 135 g (4.6 0z)
Including batteries
Supplied accessories
Connecting cord (1)
(2 phono plugs <> 2 phono plugs).
Remote commander (1)
Sony SUM-3(NS) batteries (2)
— Continued on next page —
COMPACT DISC PLAYER
SONY.

CDP-997 |
Optional accessory
Audio
optical
connecting
cord
POC-15
j
Design
and specifications
are
subject
to
change
without
notice.
TABLE OF
CONTENTS
Section
Title
Page
Section
Title
Page
1.
GENERAL
6.
EXPLODED
VIEWS
1-1.
Identifying
the
Parts-+++++++++ereseetereeeeeeeeeeeeescreereeceneesecneaan
eee
4
6-1.
Operation
Assembly
srrrsterseesseseeesensseeeseeeeseeseetesensene
essen
ees
35
6-2.
Main
Assembly
-s++r++esseeeeeteeeeeercecencsecnaseeeneeasscoeesaaeerennns
36
2.
DISASSEMBLY.
.------:-cecescecectcececcecccevececcscccasererecsacens
6
6-3.
MD
Assembly
(CDM-SBDBA)++rrserrersstessessereerseesenssennerscees
37
6-4.
Optical Pick-up
Block
Assembly
(BU-SBD8) -++++++++++-seeeseeeeeees
38
3.
IC
PIN
FUNCTIONS
«0-0-0
:-eesessceescneccnseseeececccesseeeneees
7
7.
ELECTRICAL
PARTS
LIST
-::----:---:::-sssscsescceeeeesseees
39
4.
ELECTRICAL
BLOCK CHECKING
------------:eesseeeeeeees
17
5. DIAGRAMS
5-1, Block Diagram ++++ssssecesesseseeeesrceessseneserssecesesseeeeenseeeeeses
5-2, Printed Wiring Boards
5-3. Schematic Diagram -+++-+++-+++2eeeeeeeeeeeeeeeeeee eee eeeeeeeeeeeeeeeeeees
© IC Block Diagrams:+++++++ssseeererreeeteeetsereeeseeasaeereeeeeseeees 32
© Semiconductor Lead Layouts ++++++ssssssereeeeeeeeeeteeeeseeeseeeees 34
WARNING !!
AN ISOLATION TRANSFORMER SHOULD BE USED
DURING
ANY
SERVICE
TO
AVOID
POSSIBLE
SHOCK
:
HAZARD,
BECAUSE
OF
LIVE
CHASSIS.
:
THE
CHASSIS
OF
THIS
RECEIVER
IS
DIRECTLY
CON-
;
NECTED
TO
THE
AC
POWER
LINE.
SAFETY-RELATED
COMPONENT
WARNING
!!
:
COMPONENTS IDENTIFIED BY SHADING AND MARK
ON THE SCHEMATIC DIAGRAMS, EXPLODED
VIEWS 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
PUBLISHED BY SONY.

CDP-997
(CHECKING METHODS OF LASER DIODE AND FOCUS SAFETY CHECK-OUT
SEARCH OPERATIONS)
¢ Tum the power switch ON with the condition of the disc table
closed without disc. And then watch the objective lens to
check whether the operation can be performed or not, as the
below figure shows.
After correcting the original service problem,
perform the following safety checks before releasing
the set to the customer:
Check the antenna terminals, metal trim, ‘‘metallized”’
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.
Front panel side
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5mA (500 microampers). Leakage
current can be measured by any one of three
methods.
@
The
laser
beams
diffused
can
be
observed.
1.
A
commercial
leakage
tester,
such
as
the
© The up and down movements of the objective lens (Twice) Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. A battery-operated AC milliammeter. The Data
NOTES
ON
HANDLING
THE
OPTICAL
PICK-
acta
245
digital
multimeter
is
suitable
for
UP
BLOCK
OR
BASE
UNIT
Is
Job.
3. Measuring the voltage drop across a resistor by
The laser diode in the optical pick-up block may means of a VOM or battery-operated AC volt-
suffer electrostatic breakdown because of the poten- meter. The “‘Jimit” indication is 0.75V, so
tial difference generated by the charged electrostatic analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
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.
To
Exposed
Metal
Parts on Set
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
AC
diode
emission,
observe
from
more
than
30cm
away
from
the
aa
mer
objective lens.
= Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

CDP-997 |
1-1. IDENTIFYING THE PARTS
Front Panel
SECTION 1 This section is extracted from
GEN ER AL instruction manual.
3| [4] [5] [6] [7] [8] [9} [10] [14] 12] [13] [14] [15]
31 (30 29
-—
28] [27]
[17] [16
19} [18]
26| [25] [24] [23] [22] [21] [20
POWER switch
Disc tray
= OPEN/CLOSE button
PLAY MODE buttons
CONTINUE button and indicator
SHUFFLE button and indicator
PROGRAM button and indicator
C. (custom) INDEX button and indicator
PEAK SEARCH button
ERASE (memory erase) button
FILE (custom file) button
DSP/1-20 button and indicator
FILE RECALL button
A.SPACE/A.CUE button
Numeric buttons/DSP SELECT button
> 20 (over 20)/FLAT button
CHECK (program check) button
EFFECT level
CLEAR (program clear) button
alely|=)
falzlelselelelelslolo)
16) LINE OUT/PHONE LEVEL control
PHONES jack
LEVEL FILE button
I< PI AMS* buttons
<< >> (manual search) DISC MEMO buttons
@ (stop) button
EDIT/TIME FADE button
23, Il (pause) button and indicator
24 FADER (fade in/fade out) button
REPEAT button
> (play) button and indicator
TIME/MEMO button
MUSIC SCAN button
Display window
Remote sensor
TIMER switch
* AMS is the abbreviation of Automatic Music Sensor.

| CDP-997
Remote Commander
_@= OPEN/CLOSE button
FILE RECALL button
DISPLAY MODE button
MUSIC SCAN button
[5] Numeric buttons
[6] MEMO INPUT button
FILE (custom file) button
ERASE button
DSP SELECT button
DSP FLAT button
LEVEL FILE button
FADER (fade in/fade out) button
[14] <4<q p> (manual search) buttons
LINE OUT LEVEL (line out/headphone level) buttons
<< »P SLOW (low speed manual search) buttons
4— —& INDEX buttons
i PPI AMS buttons
i (stop) button
IE (pause) button
> (play) button
A. SPACE (auto space)/A. CUE (auto cue) button
REPEAT button (repeat/A — B repeat clear) button
TIME button
>20 (over 20) button
CLEAR button
CHECK button
(22) PLAY MODE buttons
CONTINUE button
SHUFFLE button
PROGRAM button
C (custom). INDEX button
[1
[2]
[3]
[4]
A
[>] [@] (3) fe) [&) [>] [e] is) (4)
(ss) [S} [3] [3]
EBisiels) Glass)
Buttons with orange letters (A, B, C, ....... ) are for entering
| a disc memo (page 26).
le eK Bet lel a Pal te

CDP-997 |
SECTION 2
DISASSEMBLY
¢ In order to remove the front panel block when the power
supply does not turn on, rotate the cam with minus
screw-driver as the figure shows, and the loading part will be
moved.
Then pull out the loading part by your hand to remove the
loading panel as the figure shows. After that take out the front
panel block.
Bottom of chassis
@ Rotate the cam with a © screwdriver
in the direction of the arrow.
© Remove the loading panel
in the direction of the arrow.
@ Pull out the disc table.
Wet ae,

e 10342 (CXD2561M-1)
Pin No. | Symbol | I/O Description
SECTION 3
IC PIN FUNCTIONS
Digital power supply
Test pin
Normally fixed to “L”
2
Re-synchronizes at rising edge 3
¢ 1€341 (CXD2560M)
[Pinwe. [Symbol] VO | Description
[i [vs
SYSM
I
ATT
CTL
17 |MCLK | 1 |
INIT
Re-synchronizes at rising edge
of this signal.
BCK input
LRCK input
| CDP-997
Power supply pin (GND)
System mute input
“H”: active
CTL “L”: ATT data input
CTL “H”: EMP input
CTL “L”: shift clock input
CTL “H”: FS32 input
CTL “L”: latch clock input
CTL “H”: FS48 input
Pull-down within IC
“H”: direct input mode.
“L”: serial transfer mode.
Test pin
Normally fixed to “L”
Master clock input (f=512 Fs)
Power supply pin (+5V)
O | BCK output
Lch data output
2 INTE : of this signal.
a [eRe ae
5 DATAR I Rch data input
6 DATAL I Lch data input
. 5 LATCH
a
[8 [pve [= [Digit GND
Crystal oscillation input pin
ac es
(22.5 MHz) | 9 |
| 10
Substrait
i VSUB ~ | Connected to GND a f
v
Pie
PRG)
[0
|
Reh
PLM
output
|
Ginphase)
|
18 [ RIG) | O | Reh PLM output nia) |
19 [RO@) [0 | Reh PLM oupur2 (phase) |
20 | R2) | 0 | Reb PLM oupur 2 (aniphasey | [17 |
23 L2(-) | O | Leh PLM output 2 (antiphase) 20°.
24 Leh PLM output 2 (in-phase)
25 po Lch PLM output | (antiphase)
26 Analog GND
27 FL) [0 Leh PLM ouput Gass) |
[28 [avoot [= [Aratog powersupnly |
1 DR O
72 [ ERCKO | 0
| 23 | FLGL [| oO | Leh ¢ mute flag output
[24 ruGR [0 [Reh mute Mag oust |
Rch data output
LRCK output

CDP-997 |
e 1C901 (CXD2701Q)
[PinNo. | Symbot_| VO |
ee a
ee ee
Description
Input
data
format
setting
pin.
Data
position
is
changed
according
to
“H”
and
“L”.
Input
data
format
setting
pin.
“H”:
MSB
first,
“L”:
LSB
first
Serial
data
input
pin
of
1
sampling
2
channels.
Data
format:
two’s
complement
Serial bit clock input pin of serial input data
Sampling
frequency
clock
input
pin
of
serial
I/O.
Transfers
Lch
data
at
“H”
and
Rch
data
at
“L”,
GND
pin
Serial
data
output
pin.
Data
format:
two’s
complement.
Bit clock output pin. 64-slot.
Sampling frequency clock output pin of serial data
Output data bit number setting pin
BS2=H, BS1=H 24-bit
BS2=H, BS1=L 20-bit
BS2=L, BS1=H 18-bit
BS2=L, BS1=L 16-bit
Output data format setting pin. “H”: MSB first, “L”: LSB first
GND pin
System clock output pin. fsck=fxt=512 fs
Output pin of crystal oscillation circuit
Input pin of crystal oscillation circuit. fxt=512 fs
pi
[
voor
[=
[asvpowerpin
os
00
20”
[cas
[0
|
Baema
DRAM
column
ares
stobe
cuiuipia”
21
|
Wo.
[v0
|
exemal
DRAM
dea
inpuvouput
02S
21
22 1/01 1/O | External DRAM data input/output 1/O1
External DRAM write enable output pin. “L”: active
24 AO | Oo | External DRAM address output AO
25
RAS
O
|
External
DRAM
low
address
strobe
output
pin
26
Al
O
External DRAM address output Al
a7 [a2 | oO |
External DRAM address output A2
Test pin. Normally fixed to GND.
Test pin
+5V power pin
Serial
data
input
pin
where
commands,
coefficient,
and
controls,
etc.
are
transferred
from
microprocessor.
see

¢ 1C301 (M38063M6)
Pin No.
[i _[pspvor [1]
a"
GAINI
1 CNIN
1
3 VOLLED O
4 VOLDWN O
5 VOLUP O
6 LODOUT O
7 LODIN O
0
0
0
14
5.
6
LDON
Symbol
|
| CDP-997
DSP effect level input
Volume level input
Volume LED
Remote control volume down output
Remote control volume up output
Loading-out output
Loading-in output
IC901 (CXD2701) data latch pulse output
1C901 (CXD2701) data clock output
IC901 (CXD2701) data output
No connection
Analog gain control 3
Analog gain control] 2
Analog gain control 1
Track jump number count signal input
Laser diode ON/OFF output
17 FOK
GFS
SENSE
NC
18
19
20
25
26
30 XIN =
32 GND =
D7
l/O
VO
1/0
1/0
FOK monitor input
GFS monitor input
SENSE input of IC331 (CXD2500) and IC101 (CXD2501)
No connection
Subcode read out clock output
No connection
Subcode data input
SCOR input
No connection
GND
Reset input
Test mode pin
Test mode pin for electrical adjustment
Clock input
Clock output
GND
64K-SRAM data input/output 7
64K-SRAM data input/output 6
64K-SRAM data input/output 5
64K-SRAM data input/output 4
64K-SRAM data input/output 3
1/0
1/0
39 D1
P40 | po |
64K-SRAM data input/output 2
64K-SRAM data input/output 1
64K-SRAM data input/output 0

CDP-997 |
| Pin No. | Symbol
41
Description
No connection
No connection
64K-SRAM write enable output
64K-SRAM address 12
64K-SRAM address 11
64K-SRAM address 10
O 64K-SRAM address 9
O
64K-SRAM address 8
64K-SRAM address 7
64K-SRAM address 6
64K-SRAM address 5
64K-SRAM address 4
64K-SRAM address 3
64K-SRAM address 2
64K-SRAM address 1
64K-SRAM address 0
Command output pulse
55 | Al
56 | AO
57 _[ arnt
58 | MF
SACK
60 MREQ
61 CMD3
62 CMD2
63 CMD1
64 CMDO
65 XLT
LK
‘Oo
Cc
Data
clock
output
of
IC331
(CXD2500)
and
IC101
(CXD2501)
1/O_| Master/file command select input/output
Oj} Command acknowledge output
Command request input
I/O | Master microprocessor interface 3
1/O_ | Master microprocessor interface 2
Master microprocessor interface |
1/0
1/O | Master microprocessor interface 0
Data
latch
pulse
output
of
IC331
(CXD2500)
and
IC10}
(CXD2501)
66
67 DATA
68
O
O__|
Data
output
of
IC331
(CXD2500)
and
IC101
(CXD2501)
O
|
Coefficient
data
read
out
clock
output
of
IC101
(CXD2501)
Direct
control
pin
(not
used)
of
IC101
(CXD2501)
Attenuation data output of IC341 (CXD2560)
Attenuation
data
clock
output
of
IC341
(CXD2560)
Attenuation
data
latch
pulse
output
of
IC341
(CXD2560)
+5V
Audio mute output
Digital mute output
No connection
Loading in-switch input
Loading out-switch input

| CDP-997
« 1C331 (CXD2500AQ)
Description
Focus OK input pin. Used for SENS output and servo auto sequencer.
i
vas
FSW Spindle motor output filter select output
Spindle motor ON/OFF control output
Spindle motor servo control
D
DS
Spindle motor servo control
GFS is sampled at 460 Hz. “H” output: when GFS “H”. “L” output: when continuously “L” eight
times.
ii
yas oak
VCOO Analog EFM PLL oscillation circuit output
Analog EFM PLL oscillation circuit input. fLocK=8.6436 MHz
PDO
NC eed
NC a aD
NC
16 | VPCO
1 VCKI Clock input (fecenter=16.9344 MHz) from variable pitch external VCO
7
O|—
24 RF I EFM signal input
25 BIAS ez Asymmetry circuit constant-current input
26 ASYI I Asymmetry comparator voltage input
27 ASYO EFM full swing output (L=Vss, H=Vpp)
“L”: asymmetry circuit OFF. “H”: asymmetry circuit ON
Not used
30 PSSL Ee Audio data output mode select input. “L”: serial output, “H”: parallel output.
48-bit slot D/A interface. Word clock f=2Fs
48-bit slot D/A interface. LR clock f=Fs
tN
oO
i)
Power supply (+5V)
DA16 (MSB) output when PSSL=1. 48-bit slot serial data (2s’COMP, MSB first) when PSSL=0.
| oO | DAIS output when PSSL=1. 48-bit slot bit clock when PSSL=0.
36 DAI4 | O | DA14 output when PSSL=1. 64-bit slot serial data (2s’COMP, LSB first) when PSSL=O0.
DA13 output when PSSL=1. 64-bit slot bit clock when PSSL=0
DA12 output when PSSL=1. 64-bit slot LR clock when PSSL=0
DA11 output when PSSL=1. GTOP output when PSSL=0.
DA10 output when PSSL=1. XUGF output when PSSL=0.

CDP-997
i
Description
DAO9 output when PSSL=1. XPLCK output when PSSL=0.
DAO8 output when PSSL=1. GFS output when PSSL=0.
DAO7 output when PSSL=1. RFCK output when PSSL=0.
DAO06 output when PSSL=1. C2P0 output when PSSL=0.
DAOS output when PSSL=1. XRAOF output when PSSL=0.
DA04 output when PSSL=1. MNT3 output when PSSL=0.
DAO3 output when PSSL=1. MNT2 output when PSSL=0.
DAO2 output when PSSL=1. MNT1 output when PSSL=0.
DAO! output when PSSL=1. MNTO output when PSSL=0.
Control output for aperture compensation. “H”: Rch.
Control output for aperture compensation. “H”: Leh.
Crystal oscillation circuit input of 16.9344 MHz or 33.8688 MHz input.
Crystal oscillation circuit output of 16.9344 MHz.
Crystal select input pin. “L”: when crystal=16.9344 MHz.
“H”: when crystal=33.8688 MHz.
2/3 frequency-divided output of Pins 53 and 54. Not changed by variable pitch.
4,2336 MHz output. Simultaneously changed when variable pitched.
16.9344 MHz output. Simultaneously changed when variable pitched.
Digital-out ON/OFF control. “H”: ON, “L”: OFF.
Digital-out output pin
“H”
output
when
the
playback
disc
has
emphasis.
“L”
output
when
no
emphasis.
WFCK
(Write
Frame
Clock)
output
“H” output when subcode sync SO or S] is detected.
Serial output of subP through subW.
SBSO read out clock input
Output of subQ 80-bit, PCM peak, and level data 16-bit.
SQSO read out clock input
Cancelled by mute “L” at “H”.
SENS output. Output to CPU.
System reset. “L”: reset.
Serial data input from CPU
Latch input from CPU. Serial data is latched at falling.
Power supply (+5V)
Serial data transfer clock input from CPU
SENSE input from SSP
Track jump number count signal input
Serial data output to SSP
Serial data latch output to SSP. Latched at falling.
Serial data transfer clock output to SSP
Mirror
signal
input.
Used
for
jumping
128
tracks
or
more
in
auto
sequencer.
FE a

Oo
wv nv oo On
n ” a] 2] 0
O}O}O}O1O
2
8
w
O;Oo
O10
| CDP-997
Description
Timing signal output
Timing signal output
Timing signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
Segment signal output
74
Segment signal output
Segment signal output
VDD
Power
4
Segment signal output
Segment signal output
7
SCANO
5
76 SCANI1
SCAN2 | oO | Key-scan signal output
O
Key-scan signal output
Key-scan signal output
78 SCAN3 Key-scan signal output
79 SCAN4 Key-scan signal output
80 SCANS | oO | Key-scan signal output
PE ROR E ne re AEN eT MOR ERS PE

CDP-997 |

—
| CDP-997
SECTION 4
ELECTRICAL BLOCK CHECKING
Check in order of descriptions below.
2. The disc [YEDS-18] part code No. 3-702-101-01, should be
used but do not apply it unless direction is given.
3. Use the oscilloscope with more than 10 MQ impedance.
[RF Level Check] Oscilloscope
(DC range)
BD board
aa C)
TP (RF) on—0 +
TP (VC) Ow—0-
1. Connect the oscilloscope to test points, TP (RF) and TP
(VC).
2. Tur POWER switch on.
3. Insert the disc (YEDS-18) and to press [> PLAY button.
4. Check the waveforms to be normal and RF level to be
proper. Normal waveforms means © form can be observed
clearly in the center of the each waveform.
VOLT/DIV : 200 mV
RF signal waveforms TIME/DIV : 500 nS
X\)
:
)
iy
mi)
ANY
M WM M ()
40.25
A=1.2 02 Vp-p
AA
4
[E-F Balance Check]
CS, Gobo
Oscilloscope
(DC range)
BD board
eenee OP
TP (TE!) om——o}
TP (vc) o-~w—lo-
Earch TP (ADJ) and TP (TE).
Connect the oscilloscope to TP (TEI).
Turn POWER switch on.
Insert ther disc (YEDS-18) and press the [> PLAY button.
Confirm waveforms of the oscilloscope to be vertically
symmetrical in relation to OV line.
Remove the earths of TP (ADJ) and TP (TE).
(Note) Prolonged sweeping time makes it easy to see.
\
A A
ov B B
A=B A=B
[RF PLL Free-running Frequency Check]
Main board Frequency counter
SOR ea
TP (XPLCK) O“#—9+
1. Tum POWER switch on.
2. Insert the disc (YEDS-18) and push the [> PLAY button.
Confirm the frequency of TP (XPLCK) to be 4.3218 MHz.
[Focus/Tracking Galn Check]
Focus/Tracking gain determines the follow-up of pick-up relating
to mechanical noise and shock which occur when the 2-axis
device operates.
However, as these are contrary to each other, the micro-computer
automatically adjusts the position to the point that both are
satisfied with.
e When gain is raised, the noise in the 2-axis device operation
increases.
¢ When gain is lowered, it is more susceptible to mechanical
shock, and tends to skip easily.
When gain is not normal, the symptoms below appears.
¢ In spite of STOP =®[> PLAY or
low
without music begining to play.
¢ It takes longer time till music starts
when STOP =*f> PLAY or automatic ine inwerhiai
selection (4, >» buttons pressed). 8
(Normally it takes about 2 seconds).
automatic selection (4, >» button
pressed), disc continues to rotate
¢ Sound is interrupted during PLAY.
Or the time counter display stops to low
progress. ;
¢ The noise increases during 2-axis p
devi ; high
evice operating.

CDP-997 |
[Focus Gain Check]
1.
w
Low focus gain
High focus gain
Keep the set horizontal.
Keep the set horizontal, or this adjustment cannot be
performed due to the gravity against the 2-axis device.
Insert disc (YEDS-18: the Sth song) and press [> PLAY
button.
Connect the oscilloscope to IC101 @ terminal on BD board.
Check waveforms of the oscilloscope to shape ones as
shown in figure below.
Measuring points:
BD board
es
1C101 @ (focus)
1C101 @ (tracking)
TP (VC)
VOLT/DIV : 100 mV
Normal TIME/DIV :2mS
100mV
Ov
VOLT/DIV : 100 mV
TIME/DIV :2mS
OV
VOLT/DIV : 100 mV
TIME/DIV :2mS
Ov
[Tracking Gain Check]
1.
2.
Connect
the
oscilloscope
to
the
IC101
@
terminal.
Check
waveforms
of
the
oscilloscope
to
shape
ones
as
shown
in
figure
below.
Oscilloscope
(DC range)
o
Ot —-—7—-——0 +
EES ie
Normal
Low tracking gain .
VOLT/DIV : 500mV
TIME/DIV :2mS
OV
VOLT/DIV : 500mV
TIME/DIV :2mS
OV
VOLT/DIV : 500mV
TIME/DIV :2mS
High tracking gain
(The fundamental wave is higher than when gain is low.)
ov

CDP-997 CDP-997
SECTION 5
5-1. BLOCK DIAGRAM
OPTICAL PICK-UP BLOCK
KSS-240A (1/2)
OPTICAL BRIVE OPTICAL OUT
we ceri
DA
DIGITAL SIGNAL cso
TLKO
64BCLK
BCLKI
PROCESSOR
BCKO
(8)
BC
aa
eee
BIGITAL_
SIGNAL
PROCESSOR
JEQUALIZER
a=
a
XLT
(78)
XLTO
/CLV
SERVO
ee
rs
ee
1331
ccRee
G4)
TE
BATA
G8)
(7)
FE
LOCK
. FOCUS/TRACKING
. SLED CLV SERVO
PWM DRIVER 1c101
1€102
BS oo ee 1
M101 | SPINOLE
SPINDLE (M) : MOTOR ;
MOTOR
M102
SLE®
SFOR
MOTOR
SROR
pan
‘
a
|
51)
craR
SCLK
(0)
|
COIL
|
|
|
BRIVE : 53] FROR
SYSTEM CONTROL
1¢301
|
(1)
OUTI
FIN
LOADING MOTOR
TRACK ING | 47) eR (4) DRIVE
TRACKING COIL Spee 1¢103
| cou | | RIVE | 49 (1) out2 oT 5
—— — M201 = a, 2
OPTICAL
|
&
&
LOADING
a
ra
z
5
“_
a
as
|
: :
MOTOR
=:
Js
x
g
.
g
Bo
2
=
=
=
PICK-UP BLOCK MUTE
KSS~-240A
(2/2)
—
——
(33) (56)
(79)—(80)
(0)
40-33 56-44
(5)
(4)
one HEY b l | | $402 4
Sia
$272
S
S271
ya55
@—®
TIMER
|
ie LOAB IN LOAD OUT — SMHz (27) 11-13, 15-19 (25, 24 21, 10-2 VOLUME] UP = BOWN LE® ORIVE
t MOTOR a301
oY 5 3 a @——s RIVE
Pe 10303 ad 7"
RESET
(26) RESET ae RS
(") fe neat
2 : i RV521
LINE OUT
—19— — 20— io ve

CDP-997 CDP-997
ML RIVE OPTICAL OUT] |BIGITAL GUT
391 1¢391 OPTICAL
BroisesssS= 1
DIGITAL SIGNAL
yi)
><
101
BCLKI
PROCESSOR
D/A
L24)
;
/EQUAL1ZER
LRCKO
LRCKI
DIGITAL
FILTER
CONVERTER
LI)
Icg01
10341
Beka
BCR:
10342
an
4 1
1 1
‘ 1
beet
5
4
GAIN
MUT
ING
MUT
ING
1C332
CONTROL
Q601,
602
Q603
ae
ae
a911-913
alec
L-CH
PHONE LEVEL
LINE OUT
MUTE SW MUTE SW
651 604
oe? al $401-1
FI
FL TUBE
F2
+34V REG
+34V
@202-204
1206
MUTE +5V
B/A REG
Beaty 1€202, 215
+7V REG
GAINI eh 208-210
Q. INT +10V
M/F MASTER CONTROL/FL® 9R1VE se
ie 10401 +5V nee
MREQ :
cMpO
a
z
a
A
a
|
(8)
RST
a = > S cMp3 REG
a a a
3
a
RESET
2 > = = a KEYO-KEY6 | SCANO-SCAN6 T0-T9, $27-S1 T10, TH RESET SW ~~, (ii) sw
(5) (4) (3) (2) (1) 22, 24-29 33-42, 46-48, 50-73 43, 44 ea 5401-2
eS @)
@) @) aa Xe LE® ORIVE
VOLUME UP BOWN LEQ @RIVE TnER REMOCOM eee 0403-406 Sea ue -5V REG
MOTOR a301 DETECTOR @801-803 BEY MATRIX " = 9207
RIVE 1C412 $403-407, 801-842
1C303 2 =
(7) -10V
)=— RESET head x FUNCTION LEB FLD401
My) fo- asian Pain 8403-406 FLUORESCENT INDICATOR
i ech siden ehh rohan rr ae 9801-803 TUBE
RVSOI~1
LINE OUT
— 20— a or

CDP-997 CDP-997
J601
DATAO (7)
_ SIONAL oa
wee
a
an
ae
\LIZER
LRCKO (3)
DIGITAL FILTER
CONVERTER
LIQ
901
10341
10342
L2
(+)
XIN. (16) GAIN MUT ING MUT ING
CONTROL Q401, 602 Q603
ini@
sane
As
—
a911-913
seating
PHONE LEVEL
. LINE OUT
=
ee
HEADPHONE
a < <x
AMP
1c6é1
8 24, 26 27, 29-33
MUTE SW MUTE SW
Q651 Q604
oe 10-1
Fi _—c%
FL TUBE
F2
+34V REG
Q202-204
+34V
8206
att 9) Medea ee
SHIFT i)
LATCH (7) ®/A REG
A/A +5V 1€202, @215
ae a +7V_ REG
GAINI
14,
@208-210
8202-205
Ae aS
M/F (58) MASTER CONTROL/FL®! PRIVE
MREQ (60)
“ —
+10V aaa
|
RESET (20)
CMB3 (61
By voL
RESET
KEYO-KEY& © SCANO-SCANé T0-T9, $27-S1 T1071 RESET SW
= e 2 = 7 205 a
22, 24-29 ( 3-9) 1, 75-80 33-42, 46-48, 50-73 5401-2
{| POWER
$402 4 X41
TIMER REMOCOM 4. 19MHz mie Ee GRIQ DRIVE
BETECTOR @801-803 KEY MATRIX O41 D a1 -5V <—
10412 $403-407, 801-842
-10V
en FUNCTION LEB FLB401
' 0403-406 1
3 Seats FLUORESCENT INDICATOR
TUBE
POWER
TRANSFORMER
6-1 o
(0)-3 [VARTABLE
AC_IN
;
LINE OUT
|

CDP-997 CDP-997
5-2. PRINTED WIRING BOARDS
a ee ee ee ee | 8 a a (ee |
* Semiconductor Location
J601
[Rat
We
[Lsaion
[Ret
No
[tomo]
—
|
citin
— [FIXED rr [VARIABLE]
E-7 Q202 F-6 a
D202 D-7 Q203 F-6 Oop ncal
H.P REMOTE Sc |
D203
D-7
q204
|
£7
|_|
[MAIN
BOARD]
BOARD
VOL
BOARD
[DSP
VOL
BOARD]
[BD
BOARD]
D204
E-7
Q205
D6
AEP
MODEL
D205 D-7 Q206 B-6
D206 E-5 Q207 D-6 B
D207 E-6 Q208 D-6
D208 F-7 Q209 E-6
D209
E-6
Q210
E-6
——US,6
MODEL
D210 G-6 Q215 F-4
F-7 Q301 H-8
Q301 B-1 C
Q403
H-17
nat
-
Q404
1-17
=
\—
AEP
MODEL
Q405 H-17
Q406 H-18
Q410 H-13
Q41
1
H-1
3
D
(CHASSIS)
Q601 B-2 2
Q602 B-1
Q603
B-2
|_|
1-641
-568—
Q604 G5
a621 B-2
Q622 B-3 E
Q623 B-2
Q624 F-5
ae51 F-5 |
Qe52
F-5
—
=
Q801 H-19
Qso2 H-20 F
Q803 H-20
Qg01 F-7
Qg02 G-6 ny
Q903 G6
agi E-2
Qg12 D-2 G
0403 , $403
oe
ev
CONTINUE
Gass
BZ
|_|
{DISPLAY
BOARD]
Q933
H
|
—
FLUORESCENT
INDICATOR
TUBE
J
K
ae
Ls;
LJ SA09=