Sony ST-S3000ES Bedienungsanleitung

— 1 —

AEP Model

SPECIFICATIONS

MICROFILM

FM STEREO FM-AM TUNER

ST-S3000ES

SERVICE MANUAL

— 2 —

SECTION 1

GENERAL

TABLE OF CONTENTS

1. GENERAL ...................................................................2

2.TEST MODE ................................................................3

3. ELECTRICAL ADJUSTMENT ..................................... 4

4. DIAGRAMS

4-1. Waveforms.......................................................................... 7

4-2. IC Block Diagrams ............................................................. 8

4-3. Schematic Diagram — Main Section — ............................ 9

4-4. Printed Wiring Board — Main Section — ....................... 13

4-5. Printed Wiring Board — Power Board Section —........... 15

4-6. Schematic Diagram — Power Board Section — ............. 16

4-7. Printed Wiring Board — Display Section — ................... 17

4-8. Schematic Diagram — Display Section — ...................... 19

4-9. IC Pin Function

• IC701 System Control (µPD780205GF) ....................... 21

5. EXPLODED VIEW ....................................................23

6. ELECTRICAL PARTS LIST ....................................24

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE

WITH MARK !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.

Location of Parts and Controls

4567

810911

12 13

1 POWER button

2 TUNING/SELECT– button

3 TUNING/SELECT+ button

4 DISPLAY button

5 CHARACTER button

6 ANTENNA button

7 BAND button

8 MEMORY button

9 MENU ENTRY MENU button

10 MENU ENTRY RETURN button

11 MENU ENTRY ENTER button

12 TUNE MODE button

13 SHIFT button

— 3 —

1. Circuit Check Mode

Set to the reception frequency that the circuit can STEREO RDS stations. (Set the input level to above 70 dB.)

This enables circuit check to be performed in any of the reception modes-FM, AM (MW, LW). Set to a desired band before setting the test

mode.

1. Turn OFF the power.

2. While pressing ENTER and BAND together, turn ON the power.

• The items in the following table will be checked automatically in order every 2 seconds.

SECTION 2

TEST MODE

Tuned

IF Frq

Sig Level

Stereo

RDS Signal

AST signal =LOW

IF COUNT OK

SI LEVELh70dB

ST signal=LOW

RDS DATA OK

OK or NG

IC251 NG, RV251 adjustments

FE101, IC251 NG, or IF count buffer amp (Q251, Q401) NG

IC221 NG, RV221 adjustments

IC301 NG, RV301 adjustments

IC801 NG

Display Items FM RDS AM (MW, LW)

DISPLAY

NOTE : The preset data will be erased when this test mode is used. Therefore, take down the data before setting this mode and preset the data

again after completing operations in this mode.

2. FLUORESCENT INDICATORTUBE Check and KEY Check mode

1. Turn OFF the power.

2. While pressing ENTER and RETURN together, turn ON the power.

3. While continuously pressing ENTER and RETURN together, check the following.

Indication test pattern

* The indication test patterns from 2to 5are indicated on only even grids.

The display changes every 1 sec.

17F

ppppp

260

πpπpπ

37E

ppppp

πππππ

43D

πππππ

ppppp

πππππ

ppppp

πππππ

55F

πππππ

ppppp

Microcomputer version indication (1 sec) nAll light up “7F” nDot area only “60” nDot area only “7E”

Dot area only “5F” NDot area only “3D”

— 4 —

4. Release ENTER and RETURN . The KEY CHECK mode will be set.

5. All key numbers will be displayed.

Key Number : 12

6. Each time the key is pressed, the key number will be counted down.

Each key will be counted only once, at the first time.

7. When all keys have been pressed, the process will end.

NOTE : As contents of the Factory Preset will be written into memory after completing this check mode, delete contents of memory

according to 4. Forced RESET.

3. Entering the Factory Preset (In case perform just to write memory of the Factory Preset.)

1. Turn OFF the power.

2. While pressing ENTER and MEMORY together, turn ON the power.

4. Forced RESET (Used to delete the contents of Factory Preset when it is written into the preset memory.)

Clears all the RAMs and sets the initial state

1. Turn OFF the power.

2. While pressing ENTER and ANTENNA together, turn ON the power.

3. When “All clear” is indicated on the display tube.

SECTION 3

ELECTRICAL ADJUSTMENTS

Precautions in Repairing

If the front end unit fails, it is difficult to repair the inner circuits, so

replace the entire front end unit.

Set “IF : WIDE” after the all adjustments.

FM SECTION 0dB = 1µV

• Standard Setting of FM Stereo RF Signal Generator.

STEREO STANDARD SIGNAL MONAURAL

STANDARD SIGNAL

Carrier frequency : 98MHz

Modulation : Audio 1kHz

Main channel (L+R) :33.75kHz

deviation

Sub channel (L–R) :33.75kHz

deviation

Pilot :7.5kHz

deviation

Carrier frequency : 98MHz

Modulation : Audio 1kHz

75kHz deviation

FM RF SSG 1 kHz

highpass

filter distortion meter

FM ANTENNA (75

Ω

)LINE OUT

set

How to switch IF BAND : WIDE/NARROW and ANT ATT :

ON/OFF

Method:

1. Press the power button to turn the power on and set to FM.

2. Press the MENU button and press the TUNING/SELECT –, +

button to indicate “Reception” on the fluorescent display tube,

then press the ENTER button.

3. Press the TUNING/SELECT –, + button to indicate “ATT/IF

Band”, and press the ENTER button.

4. “ANT ATT: OFF” is indicated on the fluorescent display tube

and press the TUNING/SELECT –, + button to indicate “ON”

or “OFF”, then press the ENTER button.

When theANTATT is set, “ANTATT” is indicated on the fluo-

rescent display tube.

5. “IF:Wide” is indicated on the fluorescent display tube, and press

the TUNING/SELECT –, + button to indicate “Wide” or “Nar-

row”, then press the ENTER button.

When the “IF: Narrow” is set, “NARROW” is indicated on the

fluorescent display tube.

6. Set WIDE after the operation.

— 5 —

FM Discriminator ADJUSTMENT

(NULL and MONO Distortion Adjustment)

Setting :

IF BAND : WIDE

ANT ATT : OFF

FM RF SSG 1 kHz

highpass

filter distortion meter

FM ANTENNA (75

Ω

)LINE OUT

Modulation: Monaural Standard signal

Output level: 6mV (76dB) (at 75

Ω

open)

Procedure :

1. Tune the set to 98 MHz.

2. Adjust IFT252 for 0V reading on the digital voltmeter.

.................. NULL

3. Adjust IFT253 for a minimum reading on the distortion meter.

.................. MONO Distortion (THD)

4. Repeat the adjustments of 2 and 3 several times.

Note : When replacing the ceramic filter, perform this alignment.

TP251

NULL terminal

DigitalVoltmeter

(DC range)

set

Stereo Level Adjustment

Setting :

IF BAND : WIDE

ANT ATT : OFF

FM RF SSG

set

FM ANTENNA (75

Ω

)

Modulation: Stereo Standard signal

Output level: 18µV (25dB) (at 75

Ω

open)

Procedure :

1. Tune the set to 98 MHz.

2. Adjust RV251 to the point (moment) when the “STEREO”

indicator will change from going off to going on.

FM RF SSG

set

FM ANTENNA (75

Ω

)

Modulation: Stereo Standard signal

Output level: 18µV (25dB) (at 75

Ω

open)

Narrow Gain Adjustment

Setting :

IF BAND : NARROW

ANT ATT : OFF

Procedure :

1. Tune the set to 98 MHz.

2. Set “IF BAND: NARROW”accordingto the procedure of“How

to switch IF BAND WIDE/NARROW” on page 6.

3. Adjust RV231 to the point (moment) when the “STEREO” indi-

cator will change from going off to going on.

FM Meter Level Adjustment

Setting :

IF BAND : WIDE

ANT ATT : OFF

FM RF SSG

FM ANTENNA (75

Ω

)

Modulation: Stereo Standard signal

Output level: 3mV (76dB) (at 75

Ω

open)

Procedure :

1. Tune the set to 98 MHz.

2. Press DISPLAY button to display the digital signal, then adjust

RV221 to be displayed as “SIG 70dB”.

Stereo Separation Adjustment

Setting :

IF BAND : WIDE

set

FM RF SSG

FM ANTENNA (75

Ω

)

set

LINE OUT

level meter

Modulation: Stereo Standard signal

Output level: 6mV (76dB) (at 75

Ω

open)

Procedure :

1. Refer to “How to switch IF BAND WIDE/NARROW” on page

FM stereo

Signal generator

Output channel

Level meter

connection Level meter

reading (dB)

L-CH L-CH A

Adjust RV301 for minimum

reading on Level meter

R-CH L-CH

R-CH R-CH C

Adjust RV301 for minimum

reading on Level meter

L-CH R-CH

L-CH Stereo separation : A- B

R-CH Stereo separation : C- D

The separations of both channels should be equal.

— 6 —

AM SECTION

AM Meter Level Adjustment

Setting :

BAND : LW

loop antenna

AM RF SSG

AM antenna

terminal (TM1)

loop antenna

(Supplied accessories)

Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.

30% amplitude

modulation by

400Hz signal

Carrier frequency: 216kHz

Modulation: AUDIO 400Hz, 30% modulation

Procedure :

1. Set AM RF signal generator so that the AM antenna input level

becomes 74dBµ/m.

2. Adjust RV402 so that 1 to 10 indication bars light up on the signal

meter.

Adjustment Location

[MAIN BOARD] — Component Side —

60cm

set

FE101

RV402

AM Meter Level

RV301

Stereo

Separation

RV231

Narrow

Gain RV251

Stereo

Level

IFT253

(THD)

IFT252

(NULL) CNP701

IFT252, 253

FM Discriminator

RV221

FM Meter Level

— 7 — — 8 —

4-1.WAVEFORMS 4-2. IC BLOCK DIAGRAMS

THIS NOTE IS COMMON FOR PRINTEDWIRING BOARDS

AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed in each

block.)

NOTE

• : parts extracted from the component side.

• : parts extracted from the conductor side.

• : Pattern from the side which enable seeing.

NOTE

• All capacitors are in µF unless otherwise noted. pF : µµF 50WV

or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ωand 1/4W or less unless otherwise speci-

fied.

•¢: Internal component.

• : nonflammable resistor.

• : panel designation.

3 6

2 5 81 4

1415 12 91016 13

FM IF AMP

LIMITER AF/NULL

METER

QUADRATURE

DET AF AMP

IF OFF

NULL METER

SHORTING

LEVEL

DET METER

DRIVE

MUTING

CIRCUIT DETUNE

DET

GND

B+

IC401 LA1245

36 92 5 81 47 10

18 15 1219 16 1320 17 14 11

AM RF AMP AM IF AMP

MIXING

AGC

OSC

GND B+

(RF)

AM DET

METER

DRIVE

B+

(IF)

FM/AM SELECT

MUTING

FM/AM SELECT CONTROL

LOGIC / MUTE ON/OFF MUTING

OUT

LAMP

DRIVE

PLL

VCC GND

MPX

22 21 20 19 18 17 16 15 14 13 12

2 3 4 5 6 7 8 9 10 11

IC301 LA3401

IC221, 251 LA1235

1234

REG

GND

CONTROL

REG

567

IC901 LA5667

TEST LOGIC AND OUTPUT

SELECTOR SWITCH

QUALITY BIT

GENERATOR OSCILLATOR

AND

DIVIDER

RECONSTRUCTION

FILTER

57KHz

BANDPASS

(8th ORDER)

ANTI-

ALIASING

FILTER

COSTAS LOOP

VARIABLE AND

FIXED DIVIDER

CLOCKED

COMPARATOR

CLOCK REGENERATION

AND SYNC

16 15 14 13 12 11 10 9

1 2 3 4 5 6 7 8

REFERENCE

VOLTAGE

DIFFERENTIAL

DECODER

BIPHASE

SYMBOL

DECODER

Vp1

QUAL

RDDA

VREF

MUX

VDDA

VSSA

CIN

SCOUT

RDCL

T57

OSCO

OSCI

VDDD

VSSD

TEST

TSTLD

IC801 SAA6579

SECTION 4

DIAGRAMS

IC801 !£

4.332MHz

MAIN SECTION

3.2Vp-p

IC701 !¡ X2

4.2MHz

DISPLAY SECTION

5.2Vp-p

•B+ : B+ Line

•B– : B– Line

• : adjustment for repalf

• Voltage and waveforms are dc with respect to ground under no-

signal conditions.

no mark : FM

MW : ( )

LW : < >

*: Can not be measu

• Voltages are taken with aVOM (Input impedance 10MΩ).

Voltage variations maybenotedduetonormal production toler-

ances.

• Waveforms are taken with a oscilloscope.

Voltage variations maybenotedduetonormal production toler-

ances.

• Circled numbers refer to waveforms.

• Signal path.

: FM

: AM

Note: The components identified by mark !or dotted

line with mark !are critical for safety.

Replace only with part number specified.

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