Sony SPP-933 - 900mhz Cordless Telephone, Service Manual

SPP-933/934

– 25 –

– 26 –

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 

Ω

 and 

1

/

4

W or less unless otherwise

specified.

•

f

: internal component.

•

2

: nonflammable resistor.

•

4

: printed coil.

•

C

: panel designation.

•

U

: B+ Line.

•

H

: adjustment for repair.

• Power voltages are dc 9 V and fed with regulated dc power

supply from external power voltage jack (J2) on the BASE
MAIN board, dc 12 V and fed with regulated dc power
supply from modular jack (J1) on the BASE MAIN board
with 100 

Ω

 in series, and dc 3.6 V and fed with regulated

dc power supply from battery connector (J602) on the
HAND MAIN board.

• Voltages and waveforms are dc with respect to ground in

test mode.
Base unit : test mode 1 (VCO/TX FREQ. ADJ)
Handset : test mode 2 (TX MOD CHECK)

• Voltages are taken with a VOM (Input impedance 10 M

Ω

).

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.

• Circled numbers refer to waveforms.
• Signal path.

N

: RX

O

: TX

P

: BELL

5-4.

NOTE  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC  DIAGRAMS

• Semiconductor

Location

Ref. No.

Location

D302

C-5

D303

C-3

IC302

F-4

Q301

B-3

Q302

C-4

Q306

A-4

Q307

B-4

Q312

C-3

Note on Printed Wiring Board:

•

X

: parts extracted from the component side.

•

Y

: parts extracted from the conductor side.

•

W

: indicates side identified with part number.

•

: indicates direction of chip inductor.

•

f

: internal component.

•

b

: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

•

: connected by carbon pattern

Caution:
Pattern face side:

Parts on the pattern face side seen from

(Conductor Side)

the pattern face are indicated.

Parts face side:

Parts on the parts face side seen from

(Component Side)

the parts face are indicated.

R

A

B

C

D

E

F

G

H

1

2

3

4

5

6

C303

L303

C301

C306

C307

C304

R302

C337

C344

C333

R340

R330

R339

R309

R307

R328

C338

C312

C314

R306

L304

R331

C390

R303

R327

R321

C358

C336

R333

C353

R344

C320

C302

C373

C374

C324

C334

C378

R304

L307

R342

C398

L310

L301

R329

C323

C362 

JC319

C350

R326

C367

C375

C376

C368

R354

C371

C372

R351

C366

C310

R352

C369

C364

C365

C325

R361

C309

C370

C351

C341

R353

C363

JC348

C315

C339

+

C360

C357

+

Q302

B C E

Q307

B C E

Q306

BC

E

Q301

B

C

E

E

Q312

BC

E

D303

AK

L302

FT301

D302

A

K

BASE RF BOARD  

(COMPONENT SIDE)

BASE RF BOARD  

(CONDUCTOR SIDE)

L351-357

(PRINTED COIL)

B

BASE MAIN

BOARD

MOD

TX

GND

LO

GND

IF

(11)

11

(11)

11

(SHIELD CASE)

1

3

6

4

A

BASE MAIN

BOARD

ANT

GND

VCC

LE

DATA

CLK

1-676-653-

1-676-653-

CLK

DATA

LE

VCC

GND

ANT

IF

GND

LO

GND

TX

MOD

05

L355

L356

L357

(SHIELD CASE)

L354

L353

L352

L351

L309

C349

C382

R359

R317

C342

R341

C343

C386

C326

C327

R322

C321

C346

C397

C311

C379

C380

C381

R398

R397

R399

L306

C335

R332

JC316

R320

C347

C345

C319

C305

C308

C340

C348

R305

C383

IC302

1

12

24

13

RT301

L350

PRINTED

COIL

(

(

C399

5-5.

PRINTED  WIRING  BOARD  – BASE RF Section –

(Page 29)

(Page 29)