Sony ZS-2000 Service Manual
ZS-2000
SERVICE MANUAL
Ver 1.0 2000. 07
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION
With 4-ohm loads, both channels driven from
150 - 15,000 Hz; rated 6.5 W per channelminimum RMS power, with no more than 10%
total harmonic distortion in AC operation.
CD
Section
SPECIFICATIONS
US Model
Model Name Using Similar Mechanism ZS-D50
CD Loading Mechanism Type VLM-ZS2000
CD Mechanism Type CDM-2411AAA
Optical Pick-up Name DAX-01A2
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 +0.5/–0.7 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: Loop antenna
General
Speaker
Full range: 8 cm (3
Input
LINE IN jack (stereo minijack)
Minimum input level 250 mV
Outputs
Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones
OPTICAL DIGITAL OUT (CD) (optical output
connector)
W avelength: 630 - 690 nm
Power requirements
For personal audio system:
120 V AC, 60 Hz
For remote control:
3 V DC, 2 size AA (R6) batteries
Power consumption
AC 30 W
Dimensions (incl. projecting parts)
approx. 470 × 206.5 × 145.5 mm (w/h/d)
5
/8 × 8 1/4 × 5 3/4 inches)
(18
Mass
approx. 5 kg (11 lb.)
Supplied accessories
Remote control (RMT-C200A) (1)
AM loop antenna (1)
Speaker nets (2)
Design and specifications are subject to change without
notice.
1
/4 in.) dia., 4 ohms, cone type x 2
– 1 –
PERSONAL AUDIO SYSTEM
TABLE OF CONTENTS
1. SERVICING NOTES
1-1. Laser Diode and Focus Search Operation Check................ 4
1-2. Caution During when Mounting the Pulley for the
Loading Motor .................................................................... 4
2. GENERAL
Playing a CD ....................................................................... 5
Listening to the radio........................................................... 5
Setting the clock .................................................................. 6
Setting the time signal ......................................................... 6
Saving Power....................................................................... 6
3. DISASSEMBLY
3-1. “Net Sub Assy, Saran”, Speaker (Front) Sub Assy ............. 7
3-2. Cabinet, Front...................................................................... 8
3-3. Top Cabinet Assy ................................................................ 9
3-4. CD Block Assy.................................................................... 9
3-5. Power Board, REG Board .................................................10
3-6. TU Board........................................................................... 10
3-7. “Cover, Heat Sink”, Line Board........................................11
3-8. Volume Board ....................................................................11
3-9. H/P Board, Switch (1) Board, Switch (2) Board............... 12
3-10. FL Board ........................................................................... 12
3-11. Control Board, Lamp Board.............................................. 13
3-12. Main Board ....................................................................... 13
3-13. CD Board ..........................................................................14
3-14. CD Block Section.............................................................. 14
3-15. Tray Assy, CD ................................................................... 15
3-16. Loading Board................................................................... 15
3-17. Optical Pick-up Block, Pick-up Relay Board ................... 16
4. TEST MODE
4-1. General Description ..........................................................17
4-2. Test Mode .......................................................................... 17
5. ELECTRICAL ADJUSTMENTS
5-1. Tuner Section .................................................................... 18
5-2. CD Section ........................................................................ 19
6. DIAGRAMS
6-1. IC Pin Description............................................................. 20
6-2. Circuit Boards Location ....................................................22
6-3. Block Diagram –Tuner Section–....................................... 23
6-4. Block Diagram –CD Section–........................................... 25
6-5. Block Diagram –Audio Section– ...................................... 27
6-6. Printed Wiring Board –Tuner Section– ............................. 29
6-7. Schematic Diagram –Tuner Section–................................31
6-8. Printed Wiring Board –CD Section– ................................. 33
6-9. Schematic Diagrams –CD Section– .................................. 35
6-10. Printed Wiring Boards –Pick-up Section– ........................ 37
6-11. Schematic Diagrams –Pick-up Section– ...........................39
6-12. Printed Wiring Boards –Main Section– ............................ 41
6-13. Schematic Diagrams –Main Section– ...............................43
6-14. Printed Wiring Boards –Control Section–......................... 45
6-15. Schematic Diagrams –Control Section– ........................... 47
6-16. Printed Wiring Boards –Display Section– ........................ 49
6-17. Schematic Diagrams –Display Section– ...........................51
6-18. Printed Wiring Boards –Power Supply Section– .............. 53
6-19. Schematic Diagrams –Power Supply Section– .................55
7. EXPLODED VIEWS
7-1. Front Cabinet Section........................................................ 60
7-2. Rear Cabinet Section......................................................... 61
7-3. CD Block Section.............................................................. 62
7-4. CD Loading Section (VLM-ZS2000) ............................... 63
7-5. Optical Pick-up Section (CDM-2411AA) .........................64
8. ELECTRICAL PARTS LIST......................................65
– 2 –
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic 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 emission, 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 damaged by heat.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check 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.
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 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter . The “limit” indication is 0.75
V , so 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)
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.
To Exposed Metal
Parts on Set
0.15µF
Ω
1.5k
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
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 P AR TS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL
OR IN SUPPLEMENTS PUBLISHED BY SONY.
– 3 –
SECTION 1
SERVICING NOTES
1-1. LASER DIODE AND FOCUS SEARCH
OPERATION CHECK
1. Close the lid for CD.
2. Press CD u button.
3. 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.
1-2. CAUTION DURING WHEN MOUNTING THE
PULLEY FOR THE LOADING MOTOR
Make the following adjustment when mounting the loading motor
(part number: 1-698-999-11) and motor pulley (part number: 2627-174-01) of the CD section.
pulley
M790
0.9 to 1.1 mm
Install the pulley to the motor.
– 4 –
Basic Operations
SECTION 2
GENERAL
This section is extracted
from instruction manual.
Playing a CD
1
2
Connect the AC power cord to the wall outlet (see page 26).
1 Press Z CD OPEN/CLOSE
(direct power-on) and place the
CD on the CD tray until it clicks
into place.
2 Press u (N on the remote).
The CD tray closes and the player
plays all the tracks once.
With the label side up
Display
Use these buttons for additional operations
., >
u
x
or – (press VOL +, – on
the remote).
remote).
Press again to resume play
after pause.
CLOSE.
VOLUME
CD
Z
OPEN/CLOSE
POWER
Tip
Next time you want to
listen to a CD, just press
u. The player turns on
automatically and starts
playing the CD.
Playing timeTrack number
To Do this
adjust the volume Turn VOLUME toward +
stop playback Press x.
pause playback Press u (X on the
go to the next track Press >.
go back to the previous track Press ..
remove the CD Press Z CD OPEN/
turn on/off the player Press POWER.
Listening to the radio
12
Connect the AC power cord to the wall outlet (see page 26).
1 Press RADIO BAND• AUTO
2 Hold down TUNE • TIME SET +
PRESET until the band you want
appears in the display (direct
power-on).
Each time you press the button,
the band changes as follows:
“FM1” t “FM2” t “AM”
or – (TUNE + or – on the remote)
until the frequency digits begin to
change in the display.
The player automatically scans
the radio frequencies and stops
when it finds a clear station.
If you cannot tune in a station,
press the button repeatedly to
change the frequency step by
step.
Display
Indicates an FM
stereo broadcast.
Tips
• The “FM1” and “FM2”
bands have the same
functions. You can store
the stations you want
separately in “FM1” and
“FM2” (page 14).
• If the FM broadcast is
noisy, press PLAY
MODE•MONO/ST
(MODE on the remote)
until “Mono ” appears in
the display and the
radio will play in
monaural.
• Next time you want to
listen to the radio, just
press RADIO BAND•
AUTO PRESET. The
player turns on
automatically and starts
playing the previous
station.
Use these buttons for additional operations
POWER
To Do this
adjust the volume Turn VOLUME toward +
turn on/off the radio Press POWER.
To improve broadcast reception
FM:
Reorient the antenna for FM.
AM:
Keep the AM loop antenna as far as possible from the
player and reorient it.
If the broadcast is still noisy, connect the external
antenna (page 27).
PLAY MODE
MONO/ST
VOLUME
or – (press VOL +, – on
the remote).
– 5 –
The Timer
Setting the clock
“– –:– –” indication appears in the
display until you set the clock.
Tip
The time display
system of this player is
the 12-hour system.
1
2
3
To change the display to the daylight saving time
(summer time) indication
Press and hold SUMMER TIME for 2 seconds.
“Summer On ” appears in the display for a few
seconds.
To cancel the summer time indication
Press and hold SUMMER TIME again.
“Summer Off” appears in the display for a few
seconds.
CLOCK
Press and hold CLOCK until the hour digits flash.
Set the time.
1 Press TUNE •TIME
SET + or – to set the
hour and press
• ENTER
DISPLAY
MEM.
2 Press TUNE •TIME
SET + or – to set the
minutes.
Press DISPLAY• ENTER
MEM.
The clock starts from 00
seconds.
TUNE
TIME SET –, +
SUMMER TIME
DISPLAY
ENTER MEM
m
Setting the time
signal
When the power is off, you can hear the
time signal on this player. You can select
the sound for the time signal. Make sure
you have set the clock (see page 18).
Note
The time signal does
not sound when the
player is turned on.
1
When the power is off, press TIME SIGNAL to
display “TIME SIGNAL ” indication.
Do the following operations by checking the
display.
2
Press TUNE • TIME SET + or – until the sound you
want appears in the display, and press DISPLAY•
ENTER MEM.
Display Intervals
Wall Clock Sounds on the hour the number of times
Harp Sounds on the hour once
Music Box Sounds on the hour once
Chime Sounds on the hour once
Organ Sounds on the hour once
3
Press TUNE • TIME SET + or – to set the volume
you want, and press DISPLAY• ENTER MEM.
TUNE
TIME SIGNAL
corresponding to the hour and again on the
half hour once (Example: Three times at
3:00 p.m. and again at 3:30 p.m. once).
TIME SET –, +
Display
DISPLAY
ENTER MEM
continued
Setting the time signal
(continued)
4 Press TUNE • TIME SET + or – to select the time for
the time signal function to work, and then press
DISPLAY• ENTER MEM.
Display Time signal sounds
Off Not at all
Every Hour All day
Auto 7:00 a.m. - 10:00 p.m.
Once a Day* Once a day
* If you selected “Wall Clock” in step 2, you cannot select
“Once a Day”
5 If you selected “Once a Day ” in step 4, set the time
for the time signal to sound. (If you selected other
items in step 4, omit this step.)
1 Press TUNE • TIME SET + or – to set the hour
and press DISPLAY• ENTER MEM.
2 Press TUNE • TIME SET + or – to set the minutes
and press DISPLAY• ENTER MEM.
To check the sound types (demonstration mode)
Press and hold TIME SIGNAL for about 2 seconds.
You can hear the five types of sound once.
Saving power
Even when power is turned off, this
player consumes about 5.6 W for time
indication, timer operation, remote
control reception. If you use the saving
power function, you can reduce power
consumption to less than 1 W.
When the power is off, press and hold
DISPLAY• ENTER MEM for about 2 seconds.
The player enters the lower power consumption
standby mode.
To cancel the saving power
To make the time indication appear, press and hold
DISPLAY• ENTER MEM for about 2 seconds when the
power is off.
DISPLAY
ENTER MEM
– 6 –
SECTION 3
)
y (R)
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
Set
“Net Sub Assy, Saran”, Speaker (Front) Sub Assy
Cabinet, Front
Power Board,
Top Cabinet Assy
Note : Follow the disassembly procedure in the numerical order given.
REG Board
Volume Board
H/P Board, Switch (1) Board,
Switch (2) Board
CD Block Assy
TU Board “Cover, Heat Sink”, Line Board
FL Board
Control Board, Lamp Board
Main Board CD Board CD Block Section
3-1. “NET SUB ASSY, SARAN”, SPEAKER (FRONT) SUB ASSY
7 CN304
6 speaker (front)
sub assy (L)
Tray Assy, CD
Loading Board
Optical Pick-up Block,
Pick-up Relay Board
4 BVTP 3x55
1 net sub assy (L), saran
2 BVTP 3x55
8 net sub ass
5 bush, net
3 bush, net
, saran
qs bush, net
qa BVTP 3x55
qf CN304
qd speaker (front) sub assy (R
0 bush, net
9 BVTP 3x55
– 7 –
• Note for installation of the speaker (front) sub assy
y
B
AB
B
There are two types of net “bush, net”:
Type A: 3-041-456-11 (with groove in the tube)
Type B: 3-041-456-01 (without groove in the tube)
A B
The type A of “bush, net” should be installed at place A in the left figure.
pe B of “bush, net” should be installed at place B.
The t
3-2. CABINET, FRONT
3 BVTP 3x12
2 BVTP 3x12
4 cabinet, front
1 BVTP 3x12
– 8 –
3-3. TOP CABINET ASSY
1 CN904
2 CN804
5 BVTP 3x10
6 BVTP 3x10
7 top cabinet assy
3 B 3x10
4 antenna, telescopic
3-4. CD BLOCK ASSY
5 RETAINER (2) board
4 BVTP 3x10
6 BVTP 3x10
2 CN902
7 BVTP 3x10
1 CN903
qa CN403
qs CNP1
qd Connector
9 CD block assy
3 CN310
0 CN402
8 BVTP 3x10
– 9 –
3-5. POWER BOARD, REG BOARD
4 POWER board
3 BVTP 3x10
1 CN901
2 BVTP 3x10
3-6. TU BO ARD
4 B 3x6
6 REG board
5 BVTP 3x10
1 BVTP 2.6x10
3 bracket, tuner
5 TU board
2 BVTP 3x10
– 10 –
d
3-7. “COVER, HEAT SINK”, LINE BOARD
k
8 holder, line
5 claws
4 claws
2 BVTP 3x10
3-8. V OLUME BOARD
1 BVTP 3x10
7 BVTP 3x10
0 LINE board
3 BVTP 3x10
3 claws
9 BVTP 3x10
6 cover, heat sin
2 CN806
5 VOLUME boar
4 claws
1 knob (VOL)
– 11 –
3-9. H/P BOARD, SWITCH (1) BOARD, SWITCH (2) BOARD
)
7 BVTP 3x8
9 SWITCH (1) board
8
6 BVTP 3x8
4 BVTP 3x8
5 SWITCH (2) board
3 CN805
1 PWH 2x8 (DIA.6
2 H/P board
3-10. FL BOARD
4 FL board
3 BVTP 3x8
2 CN501
1 CN502
5 CN503
– 12 –
3-11. CONTROL BOARD, LAMP BOARD
2 CN801
3 BVTP 3x10
4 CONTROL board
3-12. MAIN BOARD
5 LAMP board
claws
5 MAIN board
1 CN802
3 BVTP 3x10
4
– 13 –
2 BVTP 3x10
1 CN303
claws
D
3-13. CD BOARD
d
2 BVTP 3x10
1 CN711
3
4 CD boar
5 CN713
3-14. CD BLOCK SECTION
1 BVTP 3x10
3 CD block section
chassis, C
2 BVTP 3x10
– 14 –
3-15. TRAY ASSY, CD
3 screws
(+BV 3x10)
4 cover (L), side
qf tray assy, CD
8 slider (L)
qa CD lid assy
qs
9 screws (+BV 3x10)
0 plate (L), side
qd
5 slider (R)
chassis, loading
7 plate (R), side
1 screws
(+BV 3x10)
6 screws
(+BV 3x10)
2 cover (R), side
3-16. LOADING BOARD
2 LOADING board
1 BVTP 3x10
3 Removal the solders.
– 15 –
CD block section
3-17. OPTICAL PICK-UP BLOCK, PICK-UP RELAY BOARD
d
qa CN703
qs optical pick-up block
3 tray (top), CD
0 CN704
9 CN702
7 CN707
5 claw
2 BTP 2.6x8
6 PICK-UP RELAY boar
8 CN706
4 claw
tray (bottom), CD
1 BTP 2.6x8
– 16 –
SLEEP
CLOCK TIMER
RADIO/BAND
AUTO PRESET
TEST-A
– SWITCH (1) BOARD –
SECTION 4
TEST MODE
4-1. GENERAL DESCRIPTION
This set has the TEST MODE that allows the CD unit to be
operational checked.
4-2. TEST MODE
4-2-1. Setting the test mode
1) Turn the power on.
2) Short the TEST-A land on the SWITCH(1) BOARD to open it
(or short between JW824 and JW825 to open the circuit).
4-2-2. Releasing the test mode
After the test mode is complete, turn the power off to release the
mode.
Display
88 x x xx
LCD display
(test item)
4-2-3. The contents of test mode
Mode name Description LCD display
STOP 1 The initial state and command are reset and the initial value is set.
After resetting, Stop 2 is switched to.
STOP 2 Stopped state.
FF/FR KEYis used to operate the SLED(PICK-UP).
The automatic adjustment value is held.
FOCUS FOCUS SERVO: ON. CLV-S TRACKING & SLED SERVO: OFF
If FOCUS SERVO does not turn on, for example, without disc,
FOUCS SEARCH is performed limitlessly.
When FOCUS SERVO is turned on, LPC is turned on and ‘PGM’ is
displayed.
ALL SERVO All SERVOs are turned on. When LPC is turned on, ‘PGM’ is displayed.
After automatic adjustment, ‘ r = ’ is displayed. If the automatic adjustment
value is manually changed, ‘SHUF’ is displayed.
T.G UP With SER VO OFF, TRACKING in the GAIN UP state.
LPC is turned on.
SLED FWD With SERVO OFF, SLED (PICK-UP) is moved to the outer circumference.
SLED REV With SERVO OFF, SLED (PICK-UP) is moved to the inner circumference.
FOCUS FWD With FOCUS state, SLED(PICK-UP) is moved to the outer circumference.
FOCUS REV With FOCUS state, SLED (PICK-UP) is moved to the inner circumference.
LPC OFF When all SERVOs are on and LPC is off, ‘PGM’ is turned off.
When LPC is on, PGM’ is turned on.
4-2-4. MODE transition table
KEY operated
Current
TEST MODE
STOP 1 STOP 1 FOCUS SLED RWD STOP 1 SLED FWD STOP 1
STOP 2 STOP 1 FOCUS SLED RWD STOP 2 SLED FWD STOP 2
FOCUS STOP 2 ALL SERVO FOCUS RWD FOCUS FOCUS FWD FOCUS
ALL SERVO STOP 2 LPC OFF FOCUS RWD FOCUS FOCUS FWD FOCUS
LPC OFF STOP 2 T.G UP FOCUS RWD FOCUS FOCUS FWD FOCUS
TG UP STOP 2 ALL SERVO FOCUS RWD FOCUS FOCUS FWD FOCUS
STOP PLAY/PAUSE
TUNE
TIME SET –
While held down When released While held down When released
88
88
v=
r=
r¢
u1
u2
v1
v2
-
TUNE
TIME SET +
– 17 –
)
SECTION 5
ELECTRICAL ADJUSTMENTS
5-1. TUNER SECTION 0 dB = 1 µV
• AM Section
Setting:
BAND button: AM
AM RF signal
generator
Put the lead-wire
antenna close to
the supplied
AM loop antenna.
30% amplitude
modulation by 400 Hz signal
output level : as low as possible
• FM Section
Setting:
BAND button: FM
FM RF signal
generator
0.01 µF
75 kHz frequency
deviation by 1 kHz signal
output level : as low as possible
• Connecting Level Meter (FM and AM)
32 Ω
FM ANTENNA
terminal
(TM1( 75 Ω))
set
level meter
(range: 0.5-5 V ac
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450 kHz (Display: 1,000 kHz)
AM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 0.9 ± 0.1 V 4.7 ± 0.5 V
Adjustment Part T4 <confirmation>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
T3 CT3
620 kHz 1,400 kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7 MHz (Display: 98 MHz)
FM FREQUENCY COVERAGE
ADJUSTMENT
Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.5 ± 0.1 V 3.5 ± 0.4 V
Adjustment Part L2 <confirmation>
set
i jack (J401)
• Connecting Digital Voltmeter (FM and AM)
digital
voltmeter
TU board
TP (VT)
NOTE :1) Repeat the procedures in each adjustment several times,
and the tracking adjustments should be finally done
by the trimmer capacitors.
2) Remove FM antenna in FM adjustment.
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
87.5 MHz 108 MHz
Adjustment Location: TU board (See page 19.)
– 18 –
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