Sony DEJ-760, DEJ-761, DEJ-765, DEJ-768-CK Service manual

D-EJ760/EJ761/EJ765/EJ768CK
SERVICE MANUAL
Ver 1.0 2002.12
Photo : D-EJ760
AEP Model
UK Model
D-EJ761
E Model
D-EJ761
Australian Model
D-EJ761/EJ768CK
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM-3325ER
Optical Pick-up Type DAX-25E

SPECIFICATIONS

System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs Wavelength: λ = 780 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value mea­sured at a distance of 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.)
Power requirements
For the area code of the model you purchased, check the upper left side of the bar code on the package.
• Sony NH-WM2AA rechargeable batteries: 2.4 V DC
• Two LR6 (size AA) batteries: 3 V DC
• AC power adaptor (DC IN 4.5 V jack): UK model: 230 V, 50 Hz AUS model: 240 V, 50 Hz AEP, E, EE models: 100 - 240 V, 50/60 Hz
Dimensions (w/h/d) (without projecting parts and controls)
Approx. 136.0 × 27.6 × 136.0 mm (5 3⁄8 × 1 1⁄8 × 5 3⁄8 in.)
Mass (excluding accessories)
Approx. 170 g (6.0 oz)
Operating temperature
5°C - 35°C (41°F - 95°F) Design and specifications are subject to change without notice.
Supplied Accessories
D-EJ760: Headphones/earphones (1) D-EJ761: AC power adaptor (1)
Headphones/earphones (1)
D-EJ765: AC power adaptor (1)
Headphones/earphones with remote control (1) Rechargeable batteries (2) Battery carrying case (1)
D-EJ768CK:
AC power adaptor (1) Headphones/earphones (1) Car connecting pack (1)
Car battery cord (1)
Rotary commander (1) Velcro tape for the CD player (2) Velcro tape for the rotary commander (1)
PORTABLE CD PLAYER
9-874-268-01
2002L0200-1
© 2002.12
Sony Corporation
Personal Audio Company
Pubulished by Sony Engineering Corporation
D-EJ760/EJ761/EJ765/EJ768CK
TABLE OF CONTENTS
• Abbreviation AUS : Australian EE : East European
DANGER
Invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270°C during
repairing.
• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.
Specifications ............................................................................ 1
1. SERVICING NOTES ................................................... 3
2. GENERAL
Locating the Controls ......................................................... 3
3. DISASSEMBLY
3-1. Cabinet (Upper) ASSY, Cabinet (Middle) ASSY ....... 4
3-2. MD ASSY, Main Board .............................................. 5
3-3. “Motor ASSY (Sled) (M902)”,
Optical Pick-up (DAX-25E),
“Motor ASSY, Turn Table (Spindle) (M901)” ............ 5
4. ELECTRICAL ADJUSTMENS ............................... 6
5. DIAGRAMS
5-1. Block Diagram ............................................................ 7
5-2. Schematic Diagram –MAIN SECTION (1/3)– ......... 8
5-3. Schematic Diagram –MAIN SECTION (2/3)– ......... 9
5-4. Schematic Diagram –MAIN SECTION (3/3)– ....... 10
5-5. Printed Wiring Boards ...............................................11
5-6. IC Pin Function Description ..................................... 13
6. EXPLODED VIEWS
6-1. Upper Lid Section ..................................................... 18
6-2. Cabinet Section ......................................................... 19
6-3. Optical pick-up Section (CDM-3325ER) ................. 20
7. ELECTRICAL PARTS LIST ................................... 21
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PA RTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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 emission, observe from more than 30cm away from the objective lens.
Before Replacing the Optical pick-up Block
Please be sure to check thoroughly the parameters as per the “Optical pick-up Block Checking Procedure” (Part No. : 9-960-027-11) issued separately before replacing the optical Pick-up block. Note and specifications required to check are given below.
• FOK output : IC601 yg pin
When checking FOK, remove the lead wire to disc motor.
• RF signal P-to-P value : 0.4 to 0.8Vp-p
D-EJ760/EJ761/EJ765/EJ768CK
Laser Diode Checking Methods
During normal operation of the equipment, emission of the laser diode is prohibited unless the upper panel is closed while turning ON the S801 (push switch type). The following two checking methods for the laser diode are operable.
Method : Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S801 as shown in Fig. 1 .
3. Check the object lens for confirming normal emission of the laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. During normal operation, the laser diode is turned ON about 2.5 seconds for focus searching.
S801
LOCATING THE CONTROLS
CD player (front)
1 SOUND
2 P MODE/
34 Jog lever (u (play/
pause)•./> (AMS/ search))
5 CHARGE/x
6 VOL +*/–
Display
i (headphones) jack
*The button has a tactile dot.
SECTION 2

GENERAL

Fig.1 Method to push S801
This section is extracted from instruction manual.
Strap holes
OPEN
DC IN 4.5 V (external power input) jack
LINE OUT jack
7 HOLD
CD player (inside)
89 G-PROTECTION
BATTERY COMPARTMENT
3
D-EJ760/EJ761/EJ765/EJ768CK
Y

DISASSEMBLY

z
The equipment can be removed using the following procedure.
SECTION 3
MD ASSY “Motor ASSY, turn table (spindle) (M901)”, Optical pick-up (DAX-25E),
“Motor ASSY (Sled) (M902)”
Set
Cabinet (upper) ASSY, Cabinet (middle) ASSY
Main board
Note : Follow the disassembly procedure in the numerical order given.

3-1. CABINET (UPPER) ASSY, CABINET (MIDDLE) ASSY

4 To w
screws (B2)
3 Five
screws (B2)
Cabinet (middle) ASSY
1
Cabinet (upper) ASS
2
7 CN801
5
Claw
5
Claw
5
Claw
6
Cabinet (lower) ASSY
4

3-2. MD ASSY, MAIN BOARD

Y
p
1 CN501
D-EJ760/EJ761/EJ765/EJ768CK
MD ASSY
2 CN502
3 CN503
4
Main board
5
Cabinet (lower) ASS

3-3. “MOTOR ASSY (SLED) (M902)”, OPTICAL PICK-UP (DAX-25E), “MOTOR ASSY, TURN TABLE (SPINDLE) (M901)”

1 Three screws (B1.7x4)
2
Cover, Gear
5 Three screws (B1.7x4)
Motor ASSY (Sled) (M902)
3
Motor ASSY, Turn table (Spindle) (M901)
4
Optical pick-u (DAX-25E)
6
Chassis
5
D-EJ760/EJ761/EJ765/EJ768CK
)
D4
01
IC601
C627
C626
C611
C616
L606
R632
C602
C631
R627
C620
R601
C630
R624
R623
R622
C619
R621
C618
R620
C617
R625
C634
C633
C603
C632
C613
R635
C635
R636
C609
R619
C601
TP630 (RF)
60
61
90
91
SECTION 4

ELECTRICAL ADJUSTMENTS

The CD section adjustments are done automatically in this set.
Precautions for Check
1. Perform check in the order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated.
3. Power supply voltage requirement : DC4.5 V in DC IN jack.
(J401) VOLUME button : Minimum HOLD switch : OFF
Focus bias Check
Condition:
• Hold the set in horizontal state.
Connection:
oscilloscope
(AC range)
TP630(RF)
[MAIN BOARD] (SIDE A)
Procedure:
1. Connect the oscilloscope to the test point TP630(RF) on the MAIN board.
2. Set a disc. (YEDS-18)
3. Press the u button.
4. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape () in the cen­ter of the waveform can be clearly distinguished.
RF Signal reference Waveform (Eye Pattern)
VOLT/DIV : 100 mV (With the 10 : 1 probe in use TIME/DIV : 500ns
RF level
0.4 to 0.8 Vp-p
To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watch-ing.
5. Stop revolving of the disc motor by pressing the x button.
6

5-1. BLOCK DIAGRAM

OPTICAL PICK-UP
BLOCK
(DAX-25E)
OP IC
FOCUS
COIL
TRACKING
COIL
M902 SLED
MOTOR
M901
SPINDLE
MOTOR
VCC
RF
OPGSW
OPSTB
LD
PD
M
M
A A E F
VCC2_2.0V
LD
DRIVER
Q420
VCC1_2.2V
F+
F-
T+
T-
S+
S-
W
V
U
+VBAT
L430
84
92 91 89 90 88
22
23
48
46
44
42
52
50
80
53 49 45 41
6
4
2
1
RFAC
A B E
F RFDC
SEO
SEM
FO2
RO2
FO3
RO3
FO1
RO1
W
U
V
COMCOM
VM1 VM12 VM23 VM3
SPVCC
RF
AMP
A/D
CH2
H
BRIDGE
CH3
H
BRIDGE
CH1
H
BRIDGE
CH4
H
BRIDGE
FOCUS/TRACKING COIL DRIVE SLED/SPINDLE MOTOR DRIVE
DEMODULATOR
APC
LEVEL
SHIFTER
LEVEL
SHIFTER
IC401 (1/2)
SECTION 5

DIAGRAMS

IC603
D0-3 A0-9
1,2,24,25 5,9-12,14-18
4,3,6,5 113-116,11-13,15-17
D0-D3
EFM
SERVO
PWM
FFDR
FRDR
TFDR
TRDR
SFDR
SRDR
TRDR
SFDR
FFDR FRDR MDS
TFDR TRDR
SFDR SRDR
SYNC
SRDR
MDS
MDS
96 95 98 97 100 99 102 103 104 222120324748
FFDR
TFDR
FRDR
SEP
24
FI2
58
RI2
57
BRK
70
PWM
72 4
FI3
60
RI3
59
FI1
56
RI1
55
34
SYNC
74
FG
LATCH
40
DATA
CLOCK
WAKEUP
RSTOUT
XRST
39 38 37
35
36
I/F
RAM(4M)
A0-A9
SUB CODE
PROCESSOR
MDP
C176
MDP
SYNC
SYNC MDP
COMPARATOR
DEFFERENTIAL
Q402
IC403
XRAS
XCAS
4 23 3
1 9 2
XCAS
XRAS
CLOCK
OSC
XTAO
X601
16.9MHz
3 1
XWE
XWE
XTAI
R4M
IC601
RF AMP,SERVO
DIGITAL SIGNAL PROCESSOR
D-RAM CONTROLLER
D/A CONVERTER
SIO
CLOCK_I
SDTO_I
SENS_O
78 77
70
72
75 16 17 18 66
D805
79
XIN
2
HG_GUP_O HG_XSTB_O
AGCPWM_O
FG_I/FGSE_I
XPOWLT_O MSDTI_I MSDTO_O MSCK_O XWAKE_O
8
RESET
XRST_O
XRST_I
SCOR_O
WDCK_O
SYSM_I
SCOR_I
XRST_O
42-56 57-60
SEG0
I
SEG14
LIQUID
CRYSTAL
DISPLAY
SWITCH UNIT
AMUTE_O
GRSCOR_I
COM0
XSOE_I
XLAT_I
XLAT_O
XSOE_O
I
COM3
DAC
65232425262728
LPF
FOK
FOK_I
AOUT1
51
AOUT2
56
MUTE DRIVE
Q302
HPL LOUT
43
HPR
LRMU
61
19
VDD0
|
72
105
50
57
P_SEL
P_SDTI
676873699151413121179
PGMSI_I
PGSEL_O
VCC3_2.65V
VCC2_2.0V
P_SDTO
TEST
PGMSO_O
VDD2
AVDD1
AVDD2
FLASH ROM
PROGRAM
RESET2
CLK4M2
CN901
P_SCK
PGMSCK_O
MUTE
Q301
LIN
8
RIN
9
MUTE
13
IC301
HEADPHONE AMP
PWRSW
BEEP
1114
3074 24
264
BEEP_O
AD_SEL
XPWRSW_O
IC801
SYSTEM
CONTROL
MICON
AD_KEY
AD_KEY2
2523 28 40
KEY MATRIX S406 S404 S407 S405
CLOSE
S801
(OPEN/CLOSE)
HOLD_I
S803
.
HOLD
ON OFF
+V BAT
31
TSB_I/O
(EEPROM)
AD_RMKEY
AD_CHGMNT
AD_BATMNT
AD_DCINMNT
ESP_I
38
19
G.PROTECTION
ON OFF
6
ROUT
444
VCC
3
VCC3_2.65V
VCC2_2.0V
VCC1_2.2V
VCPU_2.0V
VDD1
5
VDD2
32
21
22 66
Q403
27
VCPU_AD
VREF_AD
20
VCPU_2.0V
S802
VCPU_2.0V
D-EJ760/EJ761/EJ765/EJ768CK
J301 LINE
OUT
J302
i
IC401 (2/2)
POWER CONTROL
11
VCC3
VCC2
18
17
VCC1
19
VCPU
CHGMNT_O
67
VMMNT_O
DCIN
61
REGB
62
DET(0.29V)
63
CHGB
65
+VBAT
SWITCH
Q401, 405
• SIGNAL PATH
BATM1_I BATM2_I
D400
: CD PLAY
VCC0_I
VCC0_O
STNG
VIN
Q412
20
16
Q404
25
VDR409
L401
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
2PCS, 3V
RECHARGEABLE BATTERY
OR
NC-WMAA/NH-WM2AA
2.4V
J401
DC IN 4.5V
LG
8
12 68 69
!
77
D-EJ760/EJ761/EJ765/EJ768CK
5-2. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) – • Refer to page 12 for Notes. • Refer to page 13 for IC Pin Function Description.
M902
TRACKING
COIL
TP630
RF
E F
B
A
C502
4.7
M901
R637
22k
R639
22k
R632
R631
22k
Q301
XP4501
<M>
C202
1000p
C110
2.2
C357
22
6.3V
IC603
4M DRAM
MUTE
C102
1000p
C358
2200p
R353
C354
100
6.3V
R205
R105
1k
1k
L201
4.7µH
L101
L301
4.7µH
D302
MM3Z5VT1
D305
C816
MM3Z5VT1
100p
Q302
XP4312
<M> MUTE DRIVE
R360
0
C360
1000p
R111
C111
470
220
4V
C211
220
4V
R211
470
C361
1000p
R361
0
4.7
L303
0
4.7µH
EJ761:AUS,E/EJ768CK
R823
*R823 47k
EJ760/EJ761:AEP,EE,UK/EJ765
100k
EJ761:AUS,E/EJ768CK
L310
4.7µH
L110
4.7µH
L210
4.7µH
CN502
4P
1
4
1
2
CN501
15P
15
10
FOCUS
COIL
C617
4700p
C618
0.47
R621
C601
C602
47
0.1
4V
(RF)
C631
47k
22p
R633
R635
22k
22k
AVDD
5
1
C616
1M
C619
R634 100k
C634 470p
R1
0
CN503
WHITE
<SLED>
0.1
R620
0.47
R624
C620
R627
W
V
U
2P
0
OPGSW
OPSTB
R618
10k
R622
C632 470p
S+
LD PD
T+
470k
100p
C630
2200p
COM
C606
0.1
L603
C101
R613
2.2k
C625
6.3V
C201
4.7
10
R609 R608
R607 R606
C609
4.7
C605
0.47
XCAS
XWE
XRAS
A4 A5 A6
A7 A8 A9
D2 D3 D0 D1
W
V U
C612
R615
22
22
6.3V
0
S-
A B
RF
E
F F+ T-
F-
2.2k
220k
R623
R601
C633 470p
C635 470p
FOK
2.2k
R619
10k
R636 100k
C615
0.1
47k
L606 10µH
DVDD
R2
0
C603
0.1
C611
C627
FRDR
C613
0.1
0.1
C626
2.2
2.2
R
R
DR
TFD
TR
FFD
L601
0
L605
X601
16.9MHz
R625
0
IC601
CXD3039AR
DSP IC
SYNC
C604
10 4V
10p
C622
R603
C610
C608
47
1
4V
L604
R614
220
R626
0
0
L320
A3
A2
A1
0
C607
47p
A0
10p
C621
DR
SFDR
SR
DS
DP
M
M
L602
0
470 470
470 470
100p
R612 100k
GRSCOR
AMUTE
MSDTI MSDTO
R4M
XRST SCOR
XSOE XLAT
MSCK
R206 100k
BEEP
XPWRSW
R106 100k
C351
0.22
C352
22
6.3V
C355
1000p
C628
2.2
A3
R225
10k
R223
4.7k
R224
2.2k
C210
2.2
A2
R201
220
R101
220
C222 470p
C223 470p
C224 470p
C353
22
6.3V
A0
A1
C122 470p
C123 470p
C124 470p
*R112,212
4.7k
EJ760/EJ761:AEP,EE,UK/EJ765
100k
EJ761:AUS,E/EJ768CK
R212
*
R210
22k
A9
AS XR
R112
*
R110
22k
IC301
AN17881F-E1
0
1
E
D
D
W X
R125
10k
R123
4.7k
R124
2.2k
IC41SV4105-100TG
*
R824 470k
303
VDR
C312
1000p
R316
R315
4.7µH
VDR101
R102 VD
1k
10k
L302
VDR201
202
VDR
D306
MM3Z5VT1
R317
0
D304
MM3Z5VT1
D303
MM3Z5VT1
D301
MM3Z5VT1
J302
J301
LINE
OUT
BUS-3
VCC3_2.65V
VCC
S-2 BU
VCC2_2.0V
6
A4
A
A5
A8
A7
-2 G
VIN
8
BUS-1
8
AS
D2
XC
D3
-1 G
2.0V
PU_ VC
SEL AD
B_I/O TS
KEY M R
AD
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