Sony ZS-2000 (serv.man2) Service Manual ▷ View online
– 1 –
ZS-2000
SERVICE MANUAL
PERSONAL AUDIO SYSTEM
US Model
Model Name Using Similar Mechanism
ZS-D50
CD
CD Loading Mechanism Type
VLM-ZS2000
Section
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.)
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
AM: 530 - 1,710 kHz
Antennas
FM: Telescopic antenna
AM: Loop antenna
AM: Loop antenna
SPECIFICATIONS
General
Speaker
Full range: 8 cm (3
1
/
4
in.) dia., 4 ohms, cone type x 2
Input
LINE IN jack (stereo minijack)
Minimum input level 250 mV
Minimum input level 250 mV
Outputs
Headphones jack (stereo minijack)
For 16 - 68 ohms impedance headphones
OPTICAL DIGITAL OUT (CD) (optical output
connector)
Wavelength: 630 - 690 nm
For 16 - 68 ohms impedance headphones
OPTICAL DIGITAL OUT (CD) (optical output
connector)
Wavelength: 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
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)
(18
5
/
8
×
8
1
/
4
×
5
3
/
4
inches)
Mass
approx. 5 kg (11 lb.)
Supplied accessories
Remote control (RMT-C200A) (1)
AM loop antenna (1)
Speaker nets (2)
AM loop antenna (1)
Speaker nets (2)
Design and specifications are subject to change without
notice.
notice.
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 channel-
minimum RMS power, with no more than 10%
total harmonic distortion in AC operation.
HARMONIC DISTORTION
With 4-ohm loads, both channels driven from
150 - 15,000 Hz; rated 6.5 W per channel-
minimum RMS power, with no more than 10%
total harmonic distortion in AC operation.
– 2 –
1. SERVICING NOTES
1-1. Laser Diode and Focus Search Operation Check ................ 4
1-2. Caution During when Mounting the Pulley for the
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
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
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
4-2. Test Mode .......................................................................... 17
TABLE OF CONTENTS
5. ELECTRICAL ADJUSTMENTS
5-1. Tuner Section .................................................................... 18
5-2. CD Section ........................................................................ 19
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
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
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
– 3 –
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.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL
OR IN SUPPLEMENTS PUBLISHED BY SONY.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
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.
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.
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-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
FLEXIBLE CIRCUIT BOARD REPAIRING
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
dures other than those specified herein may result in haz-
ardous radiation exposure.
To Exposed Metal
Parts on Set
Parts on Set
0.15µF
1.5k
Ω
AC
voltmeter
(0.75V)
voltmeter
(0.75V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
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.
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.
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.
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)
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)
– 4 –
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
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.
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: 2-
627-174-01) of the CD section.
(part number: 1-698-999-11) and motor pulley (part number: 2-
627-174-01) of the CD section.
pulley
M790
0.9 to 1.1 mm
Install the pulley to the motor.
SECTION 1
SERVICING NOTES
