Sony SHR-M1 User manual

SHR-M1

E Model

Tourist Model

SERVICE MANUAL

PLL SYNTHESIZER

FM STEREO HEADPHONE RADIO

MICROFILM

SPECIFICATIONS

Radio segment

Frequency range: FM 76 – 108 MHz

Channel Step: 0.1 MHz

Power output: 3.5 mW + 3.5 mW

Headphone segment

Headphone type: Open-air Dynamic

Driver unit: ø 30 mm Dome type

Input: ø 3.5 mm stereo mini-jack

Maximum input: 100 mW

Impedance: 24 Ω(at 1 kHz)

Frequency characteristic: 14 to 24,000 Hz

Others

Power requirements 1.5 V DC, one R03 (size AAA) battery

Mass Approx. 99.5 g (3.5 oz) incl. a battery, not

incl. cord

Accessories supplied Sony R03 (sizeAAA) battery (1)

Connecting cord (1)

Design and specifications are subject to change without notice

Ver 1.0 1999.10

— 2 —

TABLE OF CONTENTS

1. GENERAL ·········································································· 3

2. DISASSEMBLY

2-1. Driver (030F023A)(L) ························································· 4

2-2. Jack Board············································································· 4

2-3. Driver (030F023A)(R) ························································· 5

2-4. Main Board ··········································································· 5

2-5. Key Board ············································································· 6

2-6. Belt ························································································ 6

3. ELECTRICAL ADJUSTMENT ···································· 7

4. DIAGRAMS

4-1. Block Diagram ······································································ 9

4-2. Printed Wiring Board — Main Board — ······················· 11

4-3. Schematic Diagram ·························································· 13

4-4. Printed Wiring Board — Key Board — ························· 15

4-5. Ic Pin Function Description ················································ 17

5. EXPLODED VIEWS ······················································ 18

6. ELECTRICAL PARTS LIST ······································· 19

SERVICE NOTE

In order to repair themachine while the main power is on, connecting

tool the MAIN board with the KEY board with a dedicated tool (J-

2503-012-A), is convenient.

KEY boar

CN201

CN1

MAIN board

Tool (J-2503-012-A)

— 3 —

SECTION 1

GENERAL This section is extracted

from instruction manual.

— 4 —

SECTION 2

DISASSEMBLY

Note : Disassemble the unit in the order as shown below.

Note : Follow the disassembly procedure in the numerical order given.

Set Driver (030F023A) (L)

Driver (030F023A) (R)

JACK Board

MAIN Board KEY Board

Belt

2-1. DRIVER (030F023A)(L)

2-2. JACK BOARD

Lead wire (white)

Lead wire (red)

Rear side (Remove the two solderings.)

Release the

three claws.

Driver

(030F023A)

Cushion

Pad, ear

Driver

(030F023A)

Cabinet assy

Green + Natural

Natural

Green + Natural

Green

Red

Green + Natural

Natural

Release the three claws.

Green + Red

Green

Red

Precaution for installation

Wire (10 arbor), lead

Lead wire (A)

Cabinet (upper)(L)

Belt

Release the claw.

S302

J302

Knob

Slide the S301 and S302 in the direction of the arrows.

Knob S301

Screw (+P2

Remove the JACK board

in the direction of the arrow.

JACK board

Cabinet (main)(L)

Remove the ten solderings.

Remove the soldering.

Cabinet (lower)(L)

Release the

two claws.

Two screws (+P2

Solder the lead wires (10 arbor) directly to the

position as shown while being cautious of colors.

Solder the lead wire (A) to ANT terminal directly.

ANT

— 5 —

2-3. DRIVER (030F023A)(R)

2-4. MAIN BOARD

Lead wire (red)

Lead wire (white)

Rrear side (Remove the two solderings.)

Release the

three claws.

Driver (030F023A)

Cushion

Pad, ear

Driver

(030F023A)

Cabinet assy

Green + Natural

Solder the lead wires (10 arbor) directly to the

position as shown while being cautious of colors.

Solder the lead wire (A) to ANT terminal directly.

Natural

Green + Red

Green

Red

Green + Natural

Natural

Green + Red

Green

Red

Wire (10 arbor), lead

Remove the connector.

(CN1)

Lead wire (A)

MAIN board

JACK board

Cabinet (main)(R)

Remove the ten solderings

from the rear side.

Remove the soldering

from the rear side.

Cabinet (lower)(R)

Release the

three claws.

Release the three claws.

Two screws (+P2

Rear side

Precaution for installation

ANT

— 6 —

2-5. KEY BOARD

2-6. BELT

KEY board

Holder (button)

Cabinet upper (R) ass

Belt

Release the three claws.

Screw (+P2

Tip

Wire (10 arbor), lea

Lead wire (A)

Belt

Cap (L)

Hook (L)

Hook (R)

Cap (R)

Mark at the 9.5 cm position

from the tip of the lead wire

and align the marking with

the center position as shown

in the illustration.

Attach the Cap (L) and leads

with adhesive agent.

Center

9.5cm

Marking

Left side Wire (10 arbor), lead

Lead wire (A)

Lead wire

(ten conductors)

Precaution for installation

Lead wire (A)

Mark at the 5.5 cm position from the tip of the lead

wire and align the marking with the center position

as shown in the illustration.

Attach the Cap (R) and leads with adhesive agent.

Center

5.5cm

Marking

Right side Wire (10 arbor), lead

Precaution for installation

— 7 —

• Repeat the procedures in each adjustment several times.

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1 76.0MHz

CT1 108.0MHz

FMVCO Adjustment

Procedure :

1. Connect frequency counter to the positions shown below.

2. Tune the set to 98 MHz.

3. Adjust RV1 so that the value of the frequency counter reading

becomes 19 kHz.

Specification Value :

Frequency counter

18,500 – 19,500 Hz

0dB=1µV

Adjustment Location: MAIN board

FM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1 10.7MHz

SECTION 3

ELECTRICAL ADJUSTMENT

0.01

FM RF signal

generator

to ANT (TP6)

75kHz (100%) amplitude modulation

by 1kHz signal.

Output level : as low as possible

Ω

Set +

–

Level mete

Speaker terminal (SP+/SP–)

0.01

FM RF signal

generator

to ANT (TP6

)

Carrier frequency : 98MHz

Modulation : no modulation

Output level : 0.1V (100dB)

Frequency counte

F+

–

100k

Ω

IC2 Pin

— Side A — — Side B —

RV1

FM VCO adjustment

FM IF freg. adjustment

CT1

FM tracking

adjustment

FM tracking

adjustment

12 1

IC2

13 24

TP6 (ANT)

SP (+)

SP (–)

— 8 —

SECTION 4

DIAGRAMS

• IC BLOCK DIAGRAMS

IC1 TA7371AF-EL

IC2 TA2022AFN-EL

IC102 LA4537M

GND

AFC DIODE(A)

RF IN

OFC DIODE(C) MIX OUT

VCC

OSC

RF OUT

1 2 3 4

5678

REG

MIX

OSC

VREF

OSC

VCC

GND

IF OUT

IF REQ

SP OUT

FM IF IN

MIX

AM IF IN

QUAD

AGC

ROUT

LOUT

ST IND

MPX IN

PILOT IN

DET OUT

IN SW

AM RF IN

LPF 2A

LPF 2B

LPF1

VCO

STOP

PULSE

OSC AGCMIX

FM DET

SWITCH

AM DET

DEVIDE

DECODE

PRE

VCO090

PILOT ST

IND

øø

POWER

SWITCH MUTE

BIAS

AMP

5 6

10 MUTE

R-OUT

GND

L-OUT

VCC

PWR

R-IN

GND

L-IN

REG

Note on Printed Wiring Board:

•X: parts extracted from the conductor side.

•a:Through hole.

•b: Pattern from the side which enables seeing.

Caution:

Pattern face side: Partsonthepattern facesideseen from

(SIDE A) the pattern face are indicated.

Parts face side: Parts on the parts face side seen from

(SIDE B) the parts face are indicated.

Note on Schematic Diagram:

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

50 WV or less are not indicated except for electrolytics

and tantalums.

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

specified.

•C: panel designation.

•U: B+ Line.

•H: adjustment for repair.

• Powervoltageisdc1.5 Vandfedwith regulated dc power

supply from battery terminal.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : FM

• Voltagesaretakenwith aVOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-

tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-

tion tolerances.

• Signal path.

F: FM

J: AUDIO IN

• Abbreviation

JE :Tourist model.

SHR-M1

4-1. BLOCK DIAGRAM

— 9 — — 10 —

TU+1.5V

CT1

FM TRACKING

1 6

RF IN MIX OUT

8FM RF

5OSC

RF MIX

OSC

FM VCO

AMP

CF1

FM IF IN

VREF

BATTERY

DETECT

Q203

LED

DRIVE

Q204

+2.5V SW

Q303,304

DET OUT

FM IF FM DET

MUTE

BIAS

AGC

STOP

PULSE

FM IF

AMP

PLL LPF

Q201,202

TU+1.5V

FM IF

S201

S202

S203

SYSTEM CONTROL

LCD DRIVE

IC201

VCOH

XOUT

TEST

LED

XIN

KSI

BEEP

MUTE

COM0-3

LCD0-8

VDD

BATT DET

TUNE ON

FM FRONT END

IC1

FM STEREO DECODER

IC2

VOLTAGE

DETECT

IC202

TU+1.5V

Q101,102

DC/DC

CONVERTER

L304, Q301,302

DC/DC

CONVERTER

IC301

LCD

LCD201

BT201

LITHIUM BATTERY

PAS621L

DRY BATTERY

SIZE "AA"

(IEC DESIGNATION R03)

1PCS, 1.5V

SP1

S301

J301

X201

75kHz

TU+1.5V

• Signal path

: FM

: AUDIO IN

TP6

ANT

RV1

RV101

POWER AMP

IC102

TP3

VCO

TP2

TP202

TP201

VCO

TP212

TEST

TP213

TP214

TP215

DOWN

TP216

PRESET

TP7

IF IN

TP305

L-CH

TP304

R-CH

TP11

MUTE TP10

BEEP

TP211

MUTE

TP207

2.5V

TP205

T-ON

TP101

1.5V

TP206

13V

TP210

1.5V

TP12

1.5V

TP209

BEEP

POWER TP208

POWER

TP1

MPX

TUNE+

TUNE-

PRESET

L1, CT1

TP8

DET OUT

FM VCO

RADIO ON

OFF i

AUDIO IN

SP2

AMP

FM IF

TU+1.5V

DEVIDE

DECODE

PRE

VCO090

MPX IN

PILOT IN

L OUT

R OUT

øø

VOL

TP301

TP302

TP303

S302

12 ENTER

13 PRESET

D201

D202-204

(LCD BACK LIGHT)

TP4

MAIN BOARD

(2/2)

MAIN BOARD

(1/2)

JACK BOARD

KEY BOARD

SHR-M1

4-2. PRINTEDWIRING BOARD — MAIN SECTION —

— 11 — — 12 —

JACK BOARD

(SIDE B)

MAIN BOARD

(SIDE B)

MAIN BOARD

(SIDE A)

JACK BOARD

(SIDE A)

TO KEY BOARD

CN201

AUDIO

RV101

VOL

S302

RADIO ON/OFF

J301

AUDIO IN

RADIO

S301

OFF

SENS

LOCAL

SP1

SPEAKER

LCH

SP2

SPEAKER

RCH

GND

RCH

LCH

SP+

1.5V

SP+

SP–

POWER 2V

13V

T-ON

GND RCH

LCH

SP+

SP–

SP+

POWER

13V

15V

T-ON

151012

13 15 20 24

19 20

ANT

RV101-2

RV101-1

1-675-125- 11

(11)

1-675-124- 11

(11)

1-675-124- 11

(11)

1-675-125- 11

(11)

E MODEL

JE MODEL

E MODEL

R22

3456

Ref. No. Location

D1 B-2

D2 B-3

D301 D-2

D302 D-2

D303 E-5

D304 E-4

IC1 B-2

IC2 A-2

IC102 B-1

IC301 D-4

Q1 B-3

Q2 A-2

Q101 B-5

Q102 B-5

Q301 D-3

Q302 D-3

Q303 D-5

Q304 D-5

• Semiconductor

Location

• Refer to page 8 for Note on PrintedWiring Board.

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