Sony ZS-2000 Service manual

ZS-2000

SERVICE MANUAL

Ver 1.0 2000. 04

CD
Section

SPECIFICATIONS

AEP 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: 87.5 - 108 MHz
MW:531 - 1,602 kHz
LW: 153 - 279 kHz

IF

FM: 10.7 MHz
MW/LW: 450 kHz

Aerials

FM: Telescopic aerial
MW/LW: Loop aerial
Radio-controlled clock: Ferrite-bar aerial

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)
Wavelength: 630 - 690 nm

Maximum power output

7.5 W + 7.5 W

Power requirements

For personal audio system:
230 V AC, 50 Hz
For remote control:
3 V DC, 2 R6 (size AA) batteries

Power consumption

AC 28 W

Dimensions (incl. projecting parts)

approx. 470 × 206.5 × 145.5 mm (w/h/d)

5

(18

/8 × 8 1/4 × 5 3/4 inches)

Mass

approx. 5 kg (11 lb.)

Supplied accessories

Remote control (1) (RMT-C200AD)
Aerial unit (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. Notes on Handling the Optical Pick-up Block or Base Unit .. 3

1-2. Notes on Laser Diode Emission Check............................... 3

1-3. Notes on Chip Component Replacement ............................ 3

1-4. Flexible Circuit Board Repairing ........................................ 3

1-5. Laser Diode and Focus Search Operation Check................ 3

1-6. Caution During when Mounting the Pulley for the

Loading Motor .................................................................... 3

2. GENERAL

Setting the Clock Automatically.......................................... 4

Playing a CD .......................................................................4

Listening to the Radio .........................................................5

Setting the Time Signal ....................................................... 5

Preparing the System ...........................................................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, EXT ANT 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, Lamp Board ..................................................... 12

3-11. Control 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, Pick-up Relay Board .............................. 16

3-18. CL/Receiver Board............................................................ 16

4. TEST MODE

4-1. General Description ..........................................................17

4-2. Test Mode .......................................................................... 17

5. ELECTRICAL ADJUSTMENTS

5-1. Tuner Section .................................................................... 19

5-2. Loop Antenna Section....................................................... 21

5-2. CD Section ........................................................................ 21

6. DIAGRAMS

6-1. IC Pin Description............................................................. 22

6-2. Circuit Boards Location .................................................... 24

6-3. Block Diagram –Tuner Section–....................................... 25

6-4. Block Diagram –CD Section–........................................... 27

6-5. Block Diagram –Audio Section– ...................................... 29

6-6. Printed Wiring Boards –Tuner Section– ........................... 31

6-7. Schematic Diagrams –Tuner Section– .............................. 33

6-8. Printed Wiring Boards –CD Section– ............................... 35

6-9. Schematic Diagrams –CD Section– .................................. 37

6-10. Printed Wiring Boards –Pick-up Section– ........................ 39

6-11. Schematic Diagrams –Pick-up Section– ........................... 41

6-12. Printed Wiring Boards –Main Section– ............................ 43

6-13. Schematic Diagrams –Main Section– ............................... 45

6-14. Printed Wiring Boards –Control Section–......................... 47

6-15. Schematic Diagrams –Control Section– ........................... 49

6-16. Printed Wiring Boards –Display Section– ........................ 51

6-17. Schematic Diagrams –Display Section– ........................... 53

6-18. Printed Wiring Boards –Power Supply Section– .............. 55

6-19. Schematic Diagrams –Power Supply Section– ................. 57

6-20. Printed Wiring Board –Loop Antenna Section–................ 58

6-21. Schematic Diagram –Loop Antenna Section– .................. 59

7. EXPLODED VIEWS

7-1. Front Cabinet Section........................................................ 65

7-2. Rear Cabinet Section......................................................... 66

7-3. CD Block Section.............................................................. 67

7-4. CD Loading Section (VLM-ZS2000) ............................... 68

7-5. Optical Pick-up Section (CDM-2411AA)......................... 69

7-6. Loop Antenna Section....................................................... 70

8. ELECTRICAL PARTS LIST ...................................... 71

– 2 –

SECTION 1

SERVICING NOTES

This Compact Disc player
is classified as a CLASS 1
LASER product.
The CLASS 1 LASER
PRODUCT label is located
on the bottom exterior.

CAUTION

Use of controls or adjustments or performance of proce­dures other than those specified herein may result in haz­ardous radiation exposure.

1-1. 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.

1-5. 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.

1-6. 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

1-2. 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 objecti ve lens.

1-3. NO TES 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.

1-4. 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.

0.9 to 1.1 mm

Install the pulley to the motor.

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.

– 3 –

Basic Operations

SECTION 2

GENERAL

This section is extracted
from instruction manual.

Setting the clock automatically

This player is equipped with the Radio-Controlled Clock Auto Adjust System. The
system receives clock data (hour, minute, second, and adjustment to/from daylight
saving time) on a certain radio wave, and automatically adjusts the clock accordingly.

will stop

1

Display

Flashes when receiving
the clock data signal

m

2

Connect the mains lead to the mains (see page 35).

1
2

Connect the aerial unit (see page

34).

When the power is off, press
CLOCK AUTO ADJUST.
Check that
display. If
CLOCK AUTO ADJUST again.

When the Auto Adjust process
has been completed,
flashing and remain lit in the
display.

If “
flashes in the display, the player
is not receiving the clock data
signal correctly. Reorient the
aerial unit.

flashes in the

does not flash, press

” does not flash and

Tips

• You can use this player
before you set the clock.

• The Clock Auto Adjust
clock data signal is
transmitted from the
following locations:
– Teddington,

Middlesex, England
52° 22’ N, 01° 11’ W

– Mainglingen,

Germany
50° 0.1’ N, 09° 00’ E

Notes

• If you turn on the
player, the Clock Auto
Adjust System stops
operation.

• Do not place the aerial
unit where reception is
weak, such as:
– near a TV, refrigerator,

computer, etc.

– on a steel table, steel

shelf, or other steel
objects.

• The actual adjustment to
or from daylight saving
time under the Clock
Auto Adjust System
may be done up to 12
hours later than the
exact moment of
transition in the year.

If the player fails to receive the clock data signal
for 12 minutes

will remain lit in the display. The player tries to
receive the clock data signal every hour. If the player
fails to receive the clock data signal for 12 hours,
will disappear from the display. In this case, set the
clock manually (see page 26).

To stop the Clock Auto Adjust on the way

Press CLOCK AUTO ADJUST to make
from the display.

Automatic updating of the clock data

The Clock Auto Adjust System will automatically
receive the clock data every hour without any manual
operation and corrects the clock accordingly, if
needed.

will not flash but remain lit during such

automatic operation.

Note that when
Adjust System is not working.

To improve reception

When reception is poor, place the aerial unit near the
window.

On the daylight saving time (summer time)
adjustment

The Clock Auto Adjust System automatically
switches the clock indication to the daylight saving
time (summer time), and back, at the necessary time
of the year.

To check if the player’s clock is on the daylight saving
time or not, press SUMMER TIME. “Summer On” or
“Summer Off” will be displayed.

To set the daylight saving time manually, see page 27.

is not displayed, the Clock Auto

disappear

GB

Basic Operations

4

Playing a CD

1

2

1

2

Connect the mains lead to the mains (see page 35).

Press Z CD OPEN/CLOSE
(direct power-on) and place the
CD on the CD tray until it clicks
into place.

With the label side up

Press u (N on the remote).
The CD tray closes and the player

plays all the tracks once.

Display

Basic Operations

Use these buttons for

OPERATE

., >

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 P re s s x .
pause playback Press u ( X on the

go to the next track Pre ss > .
go back to the previous track P re s s . .
remove the CD Press Z CD OPEN/

turn on/off the player Press OPERATE.

additional operations

u

x

VOLUME
Z CD

OPEN/CLOSE

or – (press VOL +, – on
the remote).

remote).
Press again to resume play
after pause.

CLOSE.

GB

5

GB

6

Basic Operations

– 4 –

Basic Operations

GB

7

Listening to the radio

12

Connect the mains lead to the mains (see page 35).

1

2

Press RADIO BAND •AUTO
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 “MW” t
“LW”

Hold down TUNE•TIME SET +
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 16).

• 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

OPERATE

To Do this

adjust the volume Turn VOLUME toward +

turn on/off the radio Press OPERATE.

To improve broadcast reception
FM:

Set the FM ANTENNA SELECTOR at the rear of the
player to “

Reorient the aerial for FM.

MW/LW:

Adjust the orientation of the loop aerial by aligning it
with the marks on the base one by one. Be careful not
to move the base of the aerial unit.

PLAY MODE
MONO/ST

or – (press VOL +, – on
the remote).

” (telescopic aerial).

VOLUME

GB

Basic Operations

8

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 4 or 26).

Note

The time signal does
not sound when the
player is turned on.

TUNE

TIME SIGNAL

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

corresponding to the hour and again on the
half hour once (Example: Three times at

3:00 and again at 3:30 once).
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.

TIME SET –, +

DISPLAY
ENTER MEM

Display

If the broadcast is still noisy, connect the external
aerial (page 36).

Basic Operations

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

Off Not at all
Every Hour All day
Auto 7:00 - 22:00
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.

signal sounds

GB

9

GB

The Timer

28

The Timer

GB

29

– 5 –

Setting Up

Preparing the
system

According to the illustrations,
connect the cords firmly.
Wrong connections cause mal­functions. Connect the mains
lead last.

Note

Be sure to turn off the
power of the player
before connecting/
disconnecting the
mains lead.

1 Aerial terminals

Aerial unit

FM ANTENNA
SELECTOR

1 Hooking up the aerial

1

Strip the coating from the end of the cable and
twist the wires.

2 to the mains

Tips

• The sound quality may
be changed depending
on the polarity of the
mains plug. Change the
direction of inserting
the plug and check the
sound quality.

• This unit is supplied
with a different colour
speaker net. If you wish
to change the colour of
your speaker, pull each
corner of the speaker
net toward yourself to
remove the net. Then
exchange it with the
extra net.

2 Connecting the mains lead

Connect the mains lead to the mains.

3 Inserting batteries into the remote

Insert two R6 (size AA) batteries (not supplied)

Replacing batteries

With normal use, the batteries should last for about
six months. When the remote no longer operates the
player, replace all the batteries with new ones.

continued

Note

Keep the aerial unit
away as far as possible
from the player. If you
do not, noise may be
heard.

GB

Setting Up34

Preparing the system (continued)

Important

When you use an
outdoor aerial, be sure
to connect the U
terminal to earth
against lightning. To
prevent a gas
explosion, do not
connect the ground
wire to a gas pipe.

2

Connect the black wire to U and the white wire to

terminal.

Aerial unit*

(supplied)

Black

White

* Reorient the aerial unit to improve reception

(see pages 4 and 9).

To improve the FM reception

1 Connect the FM outdoor aerial (not supplied). If

you use a distributor, you can also use the TV
aerial.

FM outdoor
aerial (not
supplied)

2 Set the FM ANTENNA SELECTOR at the rear to

“EXT”.

IEC standard socket
connector (not
supplied)

Earth

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

Setting Up

GB

35

To improve the MW/LW reception

Connect a 6- to 15-meter (20- to 50 feet) (not supplied)
insulated wire to the aerial unit terminal. Keep the
wire as horizontal as possible near the window or
outdoor. You do not need to disconnect the supplied
aerial unit.

Insulated wire

Earth

(not supplied)

GB

Setting Up

36

Setting Up

GB

37

– 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

Loop Antenna CL/Receiver Board

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, EXT ANT Board “Cover, Heat Sink”, Line Board
FL Board, Lamp Board
Control 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, 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

5 BVTP 3x12

4 BVTP 3x12

6 cabinet, front

3 BVTP 3x12

2 BVTP 3x12

1 BVTP 3x10

– 8 –

3-3. TOP CABINET ASSY

7 BVTP 3x10

1 CN904

6 BVTP 3x10

8 top cabinet assy

3 P7

5 antenna, telescopic

2 CN804

3-4. CD BLOCK ASSY

5 RETAINER (2) board

4 BVTP 3x10

4 B 3x10

1 CN903

2 CN902

0 CN402

qa CN403

qs CNP1

6 BVTP 3x10

7 BVTP 3x10

qd Connector

9 CD block assy

– 9 –

3 CN310

8 BVTP 3x10

3-5. POWER BOARD, REG BOARD

4 POWER board

3 BVTP 3x10

1 CN901

2 BVTP 3x10

3-6. TU BOARD, EXT ANT BOARD

7 B 3x6

6 REG board

5 BVTP 3x10

1 BVTP 2.6x10

5 EXT ANT board

8 TU board

4 B 3x6

6 Removal the solder.

3 bracket, tuner

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 (volume)

– 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, LAMP BOARD

1 CN502

claws

3 BVTP 3x8

2 CN501

6 LAMP board

4 FL board

5 CN503

– 12 –

3-11. CONTROL BOARD

3 BVTP 3x10

4 CONTROL board

2 CN801

1 CN802

3-12. MAIN BOARD

4

5 MAIN board

3 BVTP 3x10

2 BVTP 3x10

1 CN303

claws

– 13 –

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)

Loading chassis

6 Screws
(+BV 3X10)

7 Plate (R), Side

2 Cover (R), Side

1 Screws

(+BV 3X10)

3-16. LOADING BOARD

2 Loading board

1 BVTP 3x10

3 Removal the solders.

– 15 –

CD block section

d

3-17. OPTICAL PICK-UP, PICK-UP RELAY BOARD

d

qs optical pick-up block

3 tray (top), CD

qa CN703

0 CN704

9 CN702

7 CN707

3-18. CL/RECEIVER BOARD

5 claw

2 BTP 2.6x8

3 claw

6 PICK-UP RELAY boar

8 CN706

4 claw

tray (bottom), CD

1 BTP 2.6x8

1 PWH 2.6x10

2 case, loop (rear)

4 claw

7 Removal the solders.

5 CL/RECEIVER boar

6 connector

– 16 –

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

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.

– SWITCH (1) BOARD –

TEST-A

CLOCK TIMER

SLEEP

Display

88 x x xx

RADIO/BAND

AUTO PRESET

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 SERVO 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.

88

88

v=

r=

r¢

u1

u2

v1

v2

-

– 17 –

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

While held down When released While held down When released

TUNE

TIME SET –

TUNE

TIME SET +

– 18 –

)

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. TUNER SECTION 0 dB = 1 µV

Precautions in Repairing

Note : As a tuner unit (TU1) is difficult to repair if faulty,

replace it with new one.

• FM Section

Setting:

BAND button: FM

FM RF signal
generator

FM antenna
(JW1,2)

0.01 µF
set

15 kHz frequency
deviation by 1 kHz signal
output level : as low as possible

• MW/LW Section

Setting:

BAND button: MW or LW

AM RF signal
generator

Put the lead-wire
antenna close to
the supplied
MW/LW loop antenna.

30% amplitude
modulation by 400 Hz signal
output level : as low as possible

• Connecting Level Meter (FM, MW and LW)

FM FREQUENCY COVERAGE

CHECK

Frequency Display 87.5 MHz 108 MHz
Reading on Digital voltmeter 1.4 ± 0.2 V 6.9 ± 0.2 V
Adjustment Part <confirmation> <confirmation>

FM TRACKING CHECK

Adjust for a maximum reading on level meter.

<confirmation> <confirmation>

87.5 MHz 108 MHz

MW FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 531 kHz 1,611 kHz
Reading on Digital voltmeter 0.9 ± 0.1 V 4.9 ± 0.5 V
Adjustment Part L5 <confirmation>

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3 CT1

621 kHz 1,404 kHz

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1

999 kHz

level meter
(range: 0.5-5 V ac

32 Ω

set

i jack (J401)

• Connecting Digital Voltmeter (FM, MW and LW)

digital
voltmeter

tuner board
TP (VT)

• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

LW FREQUENCY COVERAGE

ADJUSTMENT

Frequency Display 153 kHz 279 kHz
Reading on Digital voltmeter 0.7 ± 0.2 V 5.2 ± 0.1 V
Adjustment Part <confirmation> CT3

L W TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L4 CT2

162 kHz 261 kHz

Adjustment Location: TUNER board (See page 20.)

– 19 –

Adjustment Location:

T

(COMPONENT SIDE)

JW1

JW2

MW

TRACKING

ADJUSTMENT

L3

CT1

TP(VT)

TU1

CT2
L4

LW FREQUENCY

COVERAGE

ADJUSTMENT

AM FREQUENCY

COVERAGE

ADJUSTMENT

ADJUSTMENT

LW

TRACKING

ADJUSTMEN

CT3

L5

T1

AM IF

– 20 –