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SERVICE MANUAL
US Model
SPECIFICATIONS
SPP-A1050
Ver 1.1 2004.02
9-873-076-12
Sony Corporation
2004B05-1
Personal Audio Company
C
2004.02
Shinagawa Tec Service Manual Production Group
CORDLESS TELEPHONE
WITH ANSWERING SYSTEM
General
Frequency band
902 - 928 MHz
Operating channel
30 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adaptor AC-T130
Telephone line cord (1)
Rechargeable battery pack BP-T18
Directories (1 sheet)
Wall bracket (1)
Handset
Power source
Rechargeable battery pack BP-T18
Battery life
Standby: Approx. 6 days
Talk: Approx. 7 hours
Dimensions
Approx. 56 x 178 x 43 mm (w/h/d), antenna excluded
(approx. 2 1/
4 x 7
1/
8 x 1
3/
4 inches)
Antenna: Approx. 32 mm (approx. 1 1/
4 inches)
Mass
Approx. 220 g (approx. 7.7 oz), battery included
Baseunit
Power source
DC 9V from AC power adaptor AC-T130
Battery charging time
Approx. 10 hours
Dimensions
Approx. 172 x 65 x 205 mm (w/h/d), antenna excluded
(approx. 6 7/
8 x 2
5/
8 x 8
1/
8 inches)
Antenna: Approx. 120 mm (approx. 4 3/
4 inches)
Mass
Approx. 500 g (approx. 1 lb 2 oz), wall bracket excluded
Answering machine
Maximum recording time
About 15 minutes, using incorporated IC
Greeting message
Up to 90 seconds per each
Incoming and Memo message
Up to 4 minutes per message
Design and specifications are subject to change without notice.


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2
SPP-A1050
TABLE OF CONTENTS
1.
GENERAL
Set Up the Base Unit .......................................................
3
Install the Battery Pack ...................................................
3
Charge the Battery Pack ..................................................
3
Choose the Dialing Mode ...............................................
4
Making Calls ...................................................................
4
Receiving Calls ...............................................................
4
Speed Dialing ..................................................................
4
Using the Answering Machine .......................................
5
Playing Back Messages ..................................................
6
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
7
2-2. Hand Rear ........................................................................
7
2-3. HAND MAIN Board .......................................................
7
2-4. Base Bottom ....................................................................
8
2-5. BASE MAIN Board ........................................................
8
3.
TEST MODE .............................................................. 9
4.
DIAGRAMS
4-1. Block Diagram ­ BASE UNIT Section ­ ...................... 11
4-2. Block Diagram ­ HANDSET Section ­ ........................ 12
4-3. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 13
4-4. Printed Wiring Board ­ BASE MAIN Board ­ ............. 14
4-5. Schematic Diagram ­ BASE MAIN Board ­ ................ 15
4-6. Printed Wiring Board ­ BASE KEY Board ­ ............... 16
4-7. Schematic Diagram ­ BASE KEY Board ­ .................. 16
4-8. Printed Wiring Board ­ HAND MAIN Board ­ ............ 18
4-9. Schematic Diagram ­ HAND MAIN Board ­ .............. 19
4-10. IC Pin Function Description ........................................... 20
5.
EXPLODED VIEWS
5-1. Hand Set Section ............................................................ 21
5-2. Base Set Section .............................................................. 22
6.
ELECTRICAL PARTS LIST ............................... 23
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 PUB-
LISHED BY SONY.
Notes 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.
NOTE FOR REPLACEMENT OF THE EEPROM
The ID cord is written in the EEPROM.
When replacing the EEPROM, U7 on the BASE MAIN board and
U5 on HAND MAIN board should be replaced together as a pair.
(Parts No. X-3380-233-1)
PRIOR CHECK FOR SERVICING
This set can rewrite the ID number of handset to the ID number of
base unit in the test mode even their serial numbers are different.
You can find which is wrong, handset or base unit with this
function.
Note: A normal set is needed for this test.
Define A as the normal set and B as the faulty set.
Disconnect their power.
Procedure:
1. Press the key sequence [PGM], [#], [9], [9], [0], [8] of the
handset B to enter the test mode.
2. When enter the test mode, the happy tone is emitted and the
[TALK/BATT LOW] LED will be blinking at 0.5 Hz frequency
and 50% duty cycle.
3. While pressing the [HANDSET LOCATOR] key of the base
unit A, turn the power on, then release and press it again within
2 seconds to enter the test mode.
4. When enter the test mode, the [LINE] LED turns on.
5. Disconnect the power of the handset B, then connect the power
again.
6. Disconnect the power of the base unit A, then connect the power
again.
7. Cradle the handset B on the base unit A to charge the battery
of handset B for about 1 minute.
8. Press the [TALK] key of the handset B and join the base unit
A.
9. When joining is successful, the handset B is normal. But when
it fails, charge the battery of the handset B again.
10. Next, repeat the step 1 to step 9 with the handset A and base
unit B
11. When joining is successful with handset A and base unit B,
base unit B is normal and handset B is faulty.


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SPP-A1050
SECTION 1
GENERAL
This section is extracted from
instruction manual.
2 Install the Battery Pack
1 Slide open the
battery
compartment
lid.
2 Connect the
battery
connector with
correct polarity
(black wire goes
on right side
and red wire
goes on left).
3 Close the
battery
compartment
lid.
3 Charge the Battery Pack
Charge the battery pack for at least
10 hours.
Place the handset on the base unit.
BP-T18
To AC outlet
CHARGE lamp
1 Set up the base unit
3 Raise the antenna.
To LINE
To telephone outlet
To DC IN 9V
2 Connect the AC power
adaptor AC-T130.
1 Connect the telephone
line cord.
Hook the cord.
red
black


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4
SPP-A1050
Receiving calls
1 When you hear
the phone ring;
· Press
(TALK/FLASH)
(or any key
except (OFF)).
or
· Pick up the
handset from
the base unit.
2 When you're
done talking,
press (OFF) or
replace the
handset on the
base unit.
Making calls
1 Pick up the
handset.
2 Press
(TALK/FLASH)
.
3 Dial the phone
number.
4 When you're
done talking,
press (OFF) or
replace the
handset on the
base unit.
4 Choose the dialing mode
1 Press (PGM).
2 Press (*TONE).
3 Press (1) for
pulse dialing or
(2)
for tone
dialing.
4 Press (PGM).
1 Press (PGM).
2 Press one of the
dialing buttons
((0) to (9)) for the
phone number to
be stored.
3 Enter the phone
number you want
to store.
4 Press (PGM).
Storing phone numbers
Speed dailing
Making calls
1 Press (TALK/FLASH).
2 Press (SPEED DIAL).
3 Enter the desired speed dialing
number ((0) to (9)).
(TALK/FLASH)
(SPEED DIAL)


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5
SPP-A1050
Using the Answering Machine
1 Set the Time and Day of the Week
2 Record the Greeting
1 Press (MENU) repeatedly until you hear
"Set day and time".
2 Press (SELECT) repeatedly to select the
day of the week.
3 Press (TIME/SET).
4 Press (SELECT) repeatedly to select the
hour.
5 Press (TIME/SET).
6 Press (SELECT) repeatedly to select the
minute.
7 Press (TIME/SET).
8 Press (PLAY/STOP) to exit the menu setup
mode.
1 Press (MENU) repeatedly until "Set out-
going message" is announced.
2 Press (REC/MEMO).
"Now recording" is announced and a long beep
sounds.
3 Speak into the base unit microphone
(MIC).
You can record up to 90 seconds.
4 To stop recording, press
(PLAY/STOP)
.
MIC (Microphone)
(REPEAT/SLOW)