Sony ZS-X7 Service Manual
ZS-X7
SERVICE MANUAL
Ver 1.0 1999.10
SPECIFICATIONS
US Model
Canadian Model
Model Name Using Similar Mechanism ZS-D50
CD Mechanism Type CDM-2411AAA
Optical Pick-up Type DAX-01A2
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
With 6-ohm loads, both channels driven from 100 - 15,000 Hz; rated 2.3
W per channel-minimum RMS power, with no more than 10 % total
harmonic distortion in AC operation.
Other Specifications
CD player section
System Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wave length: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW
(This output is the value measured at a distance of about 200
mm from the objective lens surface on the optical pick-up
block with 7 mm aperture.)
Spindle speed
200 r/min (rpm) to 500 r/min (rpm) (CLV)
Number of channels
2
Frequency response
20 - 20,000 Hz +0/–0.5 dB
Wow and flutter
Below measurable limit
Radio section
Frequency range
FM: 87.6 - 108 MHz
AM: 530 - 1,710 kHz
Antennas
FM: Telescopic antenna
AM: Built-in ferrite bar antenna
General
Speaker Full range: 8 cm (3 1⁄4 inches) dia.,
6 ohms, cone type (2)
Passive radiator: 12 x 6 cm (4 3⁄4 x 2 3⁄8 inches)
Outputs Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones
Power output (excluding US model)
4.5 W + 4.5 W (at 6 ohms, 10 % harmonic distortion
in DC operation)
Power requirements
For personal audio system:
DC IN 10.6 – 12 V jack accepts:
Supplied AC power adaptor (AC-E700) for use with 120 V
AC, 60 Hz
Supplied car battery cord (DCC-EC12) for use with 12 V car
battery
9 V DC, 6 size D (R20) batteries
For memory back-up:
4.5 V DC, 3 size AA (R6) batteries
Power consumption
AC 18 W
— Continued on page 2 —
PERSONAL AUDIO SYSTEM
MICROFILM
Battery life
For personal audio system:
FM playing
Sony manganese SUM-1 (N): approx. 10 h
Sony alkaline AM-1 (N): approx. 24 h
CD playback
Sony manganese SUM-1 (N): approx. 1.5 h
Sony alkaline AM-1 (N) : approx. 3.5 h
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. SERVICE NOTES......................................................... 3
2. GENERAL
Location and Function of Controls .................................... 4
Dimensions
Approx. 576 x 195 x 183 mm (w/h/d)
(22 3⁄4 x 7 3⁄4 x 7 1⁄4 inches) (incl. projecting parts)
Mass Approx. 3.2 kg (7 lb. 1 oz.) (incl. batteries)
Supplied accessories
AC power adaptor AC-E700 (1)
Car battery cord DCC-EC12 (1)
Spare fuse (1)
Shoulder strap (1)
Screws (2)
Design and specifications are subject to change without notice.
3. DISASSEMBLY
3-1. “Cabinet sub ASSY, Front”, “Cabinet, Rear” ............. 5
3-2. Tuner Board, Headphone Board ................................. 6
3-3. Main Board ................................................................. 6
3-4. Control Board, SW (2) Board ..................................... 7
3-5. CD Block ASSY ......................................................... 7
3-6. SW (1) Board .............................................................. 8
3-7. CD Board .................................................................... 8
3-8. Optical Pick-up Block ................................................ 9
3-9. Realy Board ................................................................ 9
3-10. Open/Close Board .................................................. 10
3-11. Regulator Board...................................................... 10
3-12. DC IN Board........................................................... 10
3-13. Reset Board .............................................................11
3-14. Battery (L) Board, Battery (R) Board......................11
4. TEST MODE................................................................. 12
5. ELECTRICAL ADJUSTMENTS ............................ 13
6. DIAGRAMS
6-1. Explanation of IC Terminals ................................... 15
6-2. Block Diagram ....................................................... 17
6-3. Schematic Diagram (Tuner Section) ...................... 22
6-4. Printed Wiring Boards (Tuner Section) .................. 25
6-5. Printed Wiring Boards (CD Section)...................... 27
6-6. Schematic Diagram (CD Section) .......................... 29
6-7. Printed Wiring Boards (Main Section)................... 34
6-8. Schematic Diagram (Main Section) ....................... 37
6-9. Printed Wiring Boards (Contraol Section) ............. 41
6-10. Schematic Diagram (Contraol Section) .................. 42
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 dam-
aged by heat.
7. EXPLODED VIEWS
7-1. Front Cabinet Section ............................................... 48
7-2. Rear Cabinet Section ................................................ 49
7-3. CD Block Section ..................................................... 50
7-4. Optical Pick-up Section ............................................ 51
8. ELECTRICAL PAR TS LIST.................................... 52
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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 PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMA TIQ UES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
– 2 –
SECTION 1
Push ON switch
OPEN/CLOSE switch
(S702)
SERVICE 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 more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Open the lid for CD.
2. Push ON OPEN/CLOSE switch (S702) as following figure.
3. Press CD u button.
4. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken.
Objective lens moves up and down once for the focus search.
CHUCK PLATE JIG ON REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
• Code number of Chuck Plate Jig : X-4918-255-1
– 3 –
LOCATION AND FUNCTION OF CONTROLS
FRONT PANEL
123456789q;qa
qs qd qf qgqhqjqkqlw;wa ws
SECTION 2
GENERAL
This section is extracted from
instruction manual.
REAR PANEL
1 OPR/BATT indicator
2 POWER button
3 BAND button
4 PRESET +/ – buttons
5 DISPLAY, ENTER button
6 MONO/ST, MODE button
7 ESP button
8 x (STOP) button
9 u (play/pause) button
q; TIME SET, TUNING buttons
> +
. –
qa VOL +/ – buttons
qs i jack
qd CD lid
qf Display window
qg CLOCK button
qh TIMER button
qj STANDBY button
qk SLEEP button
ql ALARM button
w; MEGA BASS button
wa SOUND button
ws DC IN (10.6 – 12V) jack
RESET switch
The player uses a built-in micro computer for its various operations. Due to change in power supply
conditions, etc., operation may sometimes become unstable. After trying the above remedies, if the
player still does not function properly, press PRESET in the battery compartment with a pointed
material.
– 4 –
SECTION 3
)
DISASSEMBLY
r
The equipment can be removed using the following procedure.
Tuner board,
Cabinet sub
Headphone board
ASSY, Front
Main board
Set
Regulator board
Cabinet, Rear
DC IN board
Reset board
Battery (L) board, Battery (R) board
Note : Follow the disassembly procedure in the numerical order given.
3-1. “CABINET SUB ASSY, FRONT”, “CABINET, REAR”
Control board,
SW (2) board
CD block ASSY
SW (1) board
CD board
Cabinet sub ASSY, front
Optical pick-up block
Relay board
OPEN/CLOSE board
3
1
2
Screws (+BTP 3x14)
Cabinet, rear
Lid, battery case
2
Screws (+BTP 3x14
– 5 –
)
)
< “CABINET SUB ASSY, FRONT” SECTION>
3-2. TUNER BOARD, HEADPHONE BOARD
Tuner board
Screws (+BV 3x12)
1
2
Screw (+BV 3x10)
5
Screw (+PWH 2.6x10
Head phone board
3-3. MAIN BOARD
Cabinet sub ASSY, front
3
1
Screws (+BV 3x12)
4
6
Wire, parallel (11core)
1
Main board
Screws (+BV 3x12
Cabinet sub ASSY, front
3
– 6 –
2
Wire, parallel (21core)
3-4. CONTROL BOARD, SW (2) BOARD
Coutrol board
4
Screws (+BV 3x10)
SW(2) board
5
3
Screws (+BV 3x10)
1
2
4
Screws (+BV 3x10)
3-5. CD BLOCK ASSY
5
OPEN
4
Screws (+BV 3x14)
7
Wire, parallel (17core)
Cabinet sub ASSY, front
2
3
1
Screws (+BV 3x12)
Filament tape
Wire, parallel (17core)
4
Screws (+BV 3x14)
Cabinet sub ASSY, front
6
Screws
(+BV 3x12)
CD block ASSY
Lid, CD
– 7 –
3-6. SW (1) BOARD
)
1
Screws (+BV 3x12)
Panel, control
3
4
Screws (+B 2.6x10)
5
2
Screws (+BV 3x12)
SW(1) board
4
Screws (+B 2.6x10
< CD BLOCK ASSY SECTION>
3-7. CD BOARD
1
Screws (+BV 3x10)
CD board
CD block ASSY
Cabinet sub ASSY, front
4
1
Screws (+BV 3x10)
2
3
CN704 (2pin)
Wire, parallel (17core)
– 8 –
3-8. OPTICAL PICK-UP BLOCK
Flexible cable
1
Screws (+PWH)
Optical pick-up block
CD block ASSY
3-9. RELAY BOARD
7
3
2
CN707 (BLUE)
4
5
CN706 (RED)
6
CN705 (WHITE)
CD bracket
CD block ASSY
Relay board
Wire, parallel (21core)
2
– 9 –
6
1
Screws (+BV 3x10)
3
CN705 (WHITE)
4
CN706 (RED)
CN707 (BLUE)
5
3-10. OPEN/CLOSE BOARD
r
CD block ASSY
1
Screws (+BV 3x10)
Bracket (SW)
3
2
OPEN/CLOSE board
< “CABINET, REAR” SECTION>
3-11. REGULATOR BOARD
Cabinet , rear
Screws (+BV 3x10)
1
2
Regulator board
3-12. DC IN BOARD
Cabinet , rea
2
– 10 –
Screw (+BV 3x10)
1
DC IN board
3-13. RESET BOARD
Cabinet , rear
Screws (+BV 3x10)
1
Reset board
3-14. BATTERY (L) BOARD, BATTERY (R) BOARD
Battery (L) board
2
Cabinet , rear
1
Screws
(+BV 3x10)
Case, battery
4
4
– 11 –
2
Battery (R) board
3
Bond (SC-121)
(7-432-912-45)
SECTION 4
JW739
5
0
2
1
JW739
5
0
2
1
TEST MODE
CD SECTION
1. Entering CD test mode
With the POWER button ON, short JW880 and JW881 on the
SW (1) board. (You need a moment for the short.)
The LCD display changes as in the diagram and the unit goes
into test mode.
PGM
cd
When you press the u key, the CD rotates and when you press
the u key again, the CD plays (the track servo comes on)(but
no sound is issued).
Pressing the u key starts automatic adjustment and the value
changes, but this value is not a problem.
[SW (1) BOARD] (Conductor side)
S813
VOL
–
R859
R851
R848
R850
S811
> +
R849
2. Exiting test mode
With the unit in test mode, when you press the POWER button
to OFF , test mode ends.
3. RF LEVEL and jitter check
Test mode PLAY status
Connection P oint : CD board (Conductor side)
(TEST-1)
JW880
JW881
1-675-599-
CD TEST MODE
SHORT : TEST MODE
OPEN : NORMAL MODE
oscilloscope
(AC range)
TP (RFO)
S812
VOL
+
Check to see that the jitter is less than 9.0 nsec. and RF level is
between 0.9 –1.3Vp-p.
VOLT/DIV : 200mV (using 10:1 probe)
TIME/DIV : 500ns
RF level:
0.9 – 1.3 Vp-p
4. TRAVERSE SIGNAL check
Connection P oint : CD board (Conductor side)
oscilloscope
(AC range)
C712
TP (VC)
2
93
94
C729
R790
R799
R718
R719
R720
R753
C725
TP
(RFO)
C723
C737
C727
C721
R731
R732
C713
C740
24
25
4
C739
20
30
C736
15
35
36
R733
13
IC701
R7
12
37
C716
3
C7
C7
R71
10
40
5
45
R721
1
48
R723
C722
R722
R73
C701
R727
C744
R706
C702
C711
C704
R743
C712
C709
5
2
1
R728
R703
C714
6
R701
R700
C710
R745
R717
JW705
C718
C717
C715
TP
(VC)
Press the FF or FR from step 3.
Check to see that the traverse signal level is between 300 to
400mVp-p.
Note:
Extend the sweep time
for easier view.
A
0V
300 – 400mVp-p
B
0V
A
B
2
93
94
C729
R790
R799
R718
R719
R720
R753
C725
TP
(RFO)
C723
C737
C727
C721
R731
R732
C713
C740
24
25
4
C739
20
30
C736
15
35
36
R733
13
IC701
TP (VC)
R7
C7
C7
R71
12
10
40
37
C716
3
5
45
R721
1
48
R723
C722
R722
R73
C701
R727
C744
R706
C702
C711
C704
R743
C712
C709
5
2
1
R728
R703
C714
6
R701
R700
C710
R745
R717
JW705
C718
C717
C715
TP
(VC)
5. RELEASE THE TEST MODE
After completed with adjustment, press the POWER button to
release the test mode.
A = B
– 12 –
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