Sony SPP-S2730 - Cordless Telephone User manual

SERVICE MANUAL
CORDLESS TELEPHONE
US Model
Canadian Model
SPECIFICATIONS
SPP-S2730
Ver 1.2 2002.01
General
Spread method
Direct-Sequence Spread-Spectrum
Access method
FDMA-TDD
Frequency band
2.4075 - 2.4720 Hz
Operating channel
40 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adaptor for the base phone
Charger/AC power adaptor for the charger
(AC-T127)
Handset
Handset cord
Telephone line cords (2)
Wall bracket/stand for base phone
Rechargeable battery pack (BP-T38)
(AC-T46)
Cordless handset
Power source
Rechargeable battery pack BP-T38
Battery life
Standby: Approx. 6 days
Talk: Approx. 5 hours
Battery charging time
Approx. 12 hours
Dimensions
Approx. 2 3⁄8 x 6 5⁄8 x 1 15⁄16 inches (w/h/d),
antenna excluded
(approx. 58 x 166 x 48 mm)
Antenna: Approx. 2 7⁄8 inches
(approx. 72 mm)
Mass
Approx. 8.1 oz
(approx. 230 g), battery included
Base phone
Power source
DC 9V from AC power adaptor
AC-T46
Dimensions
Approx. 7 3⁄8 x 3 3⁄4 x 8 1⁄8 inches (w/h/d),
antenna excluded
(approx. 187 x 93 x 206 mm)
Antenna: Approx. 4 3⁄ 8 inches
(approx. 108 mm)
Mass
Approx. 1 lb 8 oz
(approx. 680 g), wall bracket excluded
Charger
Power source
DC 9V from AC power adaptor
AC-T127
Dimensions
Approx. 3 1⁄4 x 2 5⁄8 x 4 1⁄8 inches (w/h/d)
(approx. 80 x 64 x 102 mm)
Mass
Approx. 2.7 oz (approx. 75 g)
Design and specifications are subject to
change without notice.
9-873-167-03 Sony Corporation
2002A0500-1 Personal Audio Company
C2002.1 Published by Sony Engineering Corporation

2
SPP-S2730
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 3
2. GENERAL
Identifying the Parts ........................................................ 4
Registering additional cordless handsets........................ 8
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 10
3-2. Cabinet (Rear) ................................................................. 10
3-3. Hand Main Board............................................................ 10
3-4. Base Cabinet (Lower) Assy ............................................ 11
3-5. Base Key Board............................................................... 11
3-6. Base Main Board............................................................. 12
4. TEST MODE
Base Unit ......................................................................... 13
Handset ............................................................................ 15
RF Testing ....................................................................... 18
5. ELECTRICAL ADJUSTMENTS
Base Unit ......................................................................... 20
Handset ............................................................................ 22
6. DIAGRAMS
6-1. Block Diagram – BASE UNIT Section – ...................... 25
6-2. Block Diagram – HANDSET Section –........................ 26
6-3. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 27
6-4. Printed Wiring Board
– BASE MAIN Board (Component Side) – ................... 28
6-5. Printed Wiring Boards – BASE MAIN
(Conductor Side)/BASE MIC Boards – ......................... 29
6-6. Schematic Diagram – BASE MAIN Board (1/3) –....... 30
6-7. Schematic Diagram
– BASE MAIN (2/3)/BASE MIC Boards – ................... 31
6-8. Schematic Diagram – BASE MAIN Board (3/3) –....... 32
6-9. Printed Wiring Boards
– BASE KEY/KEY JOG Boards – ................................. 34
6-10. Schematic Diagram
– BASE KEY/KEY JOG Boards – ................................. 35
6-11. Printed Wiring Board – HAND MAIN Board – ........... 36
6-12. Schematic Diagram – HAND MAIN Board (1/2) – ..... 37
6-13. Schematic Diagram – HAND MAIN Board (2/2) – ..... 38
6-14. IC Pin Function Description ........................................... 39
7. EXPLODED VIEWS
7-1. Hand Set .......................................................................... 45
7-2. Base Set ........................................................................... 46
8. ELECTRICAL PARTS LIST ............................... 47
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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 CRYSTAL VI-
BRATOR ON THE HAND MAIN BOARD
There are two types of crystal vibrators used on the HAND MAIN
board. Accordingly, when replacing the crystal vibrator, replace
the following reference number parts together. Similarly, when
the following reference number parts are replaced, check which
type of crystal vibrator is used and use the same type.
Crystal Ref. No. TYPE A TYPE B
vibrator
C11 18PF 33PF
X31 C12 18PF 22PF
R40 1.5kΩ1kΩ
[How to identify theTYPE A or B of crystal vibrator]
The type A or B can be identified from the initial character of a
character staring indicated on the top surface of the parts.
TYPE A: Starting with a numeric value
TYPE B: Staring with alphabet D
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
Ver 1.1

3
SPP-S2730
SECTION 1
SERVICING NOTES
IF AN ERROR MESSAGE IS DISPLAYED
If the following error message is displayed after the power was turned on, check the items where “1” is indicated.
•Note on ReplacingThe EEPROM
After the EEPROM was replaced, write various parameters in the “TEST MODE E” (base unit: see page 14, handset: see page 16). (For
the ID, see “Writing ID Numbers” described below)
Note: Replacing the EEPROM causes all data such as customer registered recording messages, caller ID data (only when replacing EEPROM in base unit)
and telephone directory (base unit or handset) to be cleared.
RE-REGISTERING ALREADY REGISTERED SET
Initialize the registered information on base unit and all handsets, and then register again all handsets starting with handset 1 by the
method given below. When re-registering the handset, refer to “Registering additional cordless handsets” in the instruction manual. (see
page 8)
– Base unit –
1. Turn the power on.
2. Press three keys of [1], [EZ ACCESS], and [INTERCOM] simultaneously to set the test mode.
– Handset –
1. Turn the power on.
2. Press three keys of [1], [EZ ACCESS], and [INTERCOM] simultaneously.
WRITING ID NUMBERS (for additional handsets)
The ID numbers are given in decimal notation on the bottom of base unit. If handsets are added, ID can be written in the TEST mode, but
the TEST mode handles ID numbers in hexadecimal notation, thus requiring decimal numbers to be converted into hexadecimal numbers.
Accordingly, when adding the handsets, refer to “Registering additional cordless handsets” in the instruction manual. (see page 8)
However, if the EEPROM was replaced, the handsets cannot be registered by the method mentioned above. In such a case, enter various
parameters except ID numbers in the “TEST MODE E”, and then register the handsets by the method given in the instruction manual.
Also, the ID numbers can be written in the “TEST MODE B”(decimal number) (base unit: see page 15, handset: see page 17).
ERROR=[][]00[][]00
EEPROM*1 data error tWrite correct data to the EEPROM.
ID error tWrite correct ID data.
DSP (IC402)*2 error tCheck the DSP (IC402) and its peripheral circuits.
EEPROM*1 error tCheck the EEPROM and its peripheral circuits.
*1) Base unit: IC303, Handset: IC122
*2) Base unit only

4
SPP-S2730 SECTION 2
GENERAL This section is extracted from
instruction manual.
Getting Started
28
US
Identifying the parts
Refer to the pages indicated in parentheses for details.
Base phone
1Display window (p. 35, 60)
2VOICE MAIL lamp (p. 70)
Flashes when you have essages.
3NEW CALL lamp (p. 61)
Flashes when there is a “NEW”
data in the Caller ID list.
4Handset (p. 12, 35, 41)
5Speaker
6TONE button (p. 33)
Allows you to switch te porarily to
tone dialing.
7Dialing keys (p. 35)
8#button (p. 66)
Used to change the nu ber of
digits of the phone nu ber in the
Caller ID list.
9ERASE button (p. 24)
0PROGRAM button (p. 23)
qa VOL – button (p. 35)
Adjusts the handset or speaker
volu e.
qs VOL + button (p. 35)
Adjusts the handset or speaker
volu e.
qd Jog Dial (p. 21, 61)
qf EZ ACCESS button (p. 23, 35)
Lets you ake a call with the
registered access nu ber.
qg REDIAL/PAUSE button (p. 37)
Redials one of the last five nu bers
called/inserts a pause in the dialing
sequence.
qh CALL WAITING/FLASH button
(p. 36, 68)
Switches to a second call if you
have “call waiting” service, or lets
you ake a new call.
1
2
3
4
5
0
qa
qs
qd
qf
qg
qh
qj
w;
ql
qk
6
7
8
9

5
SPP-S2730
Getting Started
29
US
Getting Started
continued
qj INTERCOM button (p. 55)
Lets you talk between the base
phone and cordless handset.
qk HOLD button (p. 36)
Puts a call on hold.
ql SPEAKERPHONE button
(p. 35)
Lets you ake or receive a call.
w; MIC (microphone)
ws wd
wa
wf wg
wa Antenna (p. 12, 71)
ws Hook for AC power adaptor
cord (p. 12, 71)
wd DC IN 9V jack (p. 12, 71)
wf LINE (telephone line) jack
(p. 12, 71)
wg HANDSET jack (p. 12)

6
SPP-S2730
Getting Started
30
US
Identifying the parts (continued)
1Antenna
2Speaker
3Display window (p. 32, 60)
4TALK button (p. 32)
Lets you ake or receive a call.
5HOLD button (p. 33)
Puts a call on hold.
6Battery compartment (p. 14)
7CALL WAITING/FLASH button
(p. 33, 68)
Switches to a second call if you
have “call waiting” service, or lets
you ake a new call.
Cordless handset
1
qa
qs
qd
2
3
4
5
6
7
8
9
0
8EZ ACCESS button (p. 23, 33)
Lets you ake a call with the
registered access nu ber.
9Jog Dial (p. 17, 43, 61)
0OFF button (p. 32, 40)
Allows you to disconnect the call.
qa INTERCOM button (p. 54, 56)
Lets you talk between the base
phone and the cordless handset.
qs Dialing keys (p. 32)
qd ERASE button (p. 18, 45)

7
SPP-S2730
Getting Started
31
US
Getting Started
qg
qh
qj
ql
qk
w;
wa
qf
qf TONE button (p. 33)
Allows you to switch te porarily to
tone dialing.
qg RINGER
qh I(HEADSET) jack (p. 33, 39, 72)
qj VOL (volume) switch (p. 33)
Adjust the cordless handset
volu e.
qk #button (p. 66)
Used to change the nu ber of digits
of the phone nu ber in the Caller
ID list.
ql PGM (program) button
(p. 17, 43)
w; REDIAL/PAUSE button
(p. 24, 37)
Redials one of the last five nu bers
called/inserts a pause in the dialing
sequence.
wa MIC (Microphone)

8
SPP-S2730
Getting Started
25
US
Getting Started
The phone syste includes a cordless handset. You can expand the
syste including a total of four cordless handsets. Be sure to register
the ID nu ber of the additional cordless handset called “station
nu ber” to the base phone before using the additional cordless
handset. The station nu ber of the base phone is set to 0 and that of
the cordless handset (supplied with the base phone) is set to 1 at the
factory. The station nu ber of the cordless handset newly added to the
syste will be one of the nu ber 2 through 4 in the order of
registration.
Before you start registering, set all the unit of the syste in standby
ode and place the close to each other (within a distance of 12
inches). Then do the following procedure only on the additional
cordless handsets one bye one.
Caution
Do not register two or three cordless handsets at the same time.
Doing so may result in more than one cordless handsets having an
identical station number.
1Press (PGM).
2Press (INTERCOM).
You hear a confir ation beep.
RING OFFMASSAGEOLDNEW
ENTER SYSTEM ID
_
within 12 inches
Base phone cordless handset
continued
Registering additional cordless handsets

9
SPP-S2730
Getting Started
26
US
3Enter the 10 digits syste ID by
pressing the dialing keys.
The syste ID is shown on a sticker
affixed to the botto of the base phone.
4Press (PGM).
You hear a long confir ation beep and
the assigned station nu ber is
displayed.
Notes
• Do not allow ore than 60 seconds to elapse during the operation procedure.
• Once you add a cordless handset to the base phone syste , you cannot change the
station nu bers, or cancel the additional registrations.
• When you press any button other than (PGM) to use an unregistered cordless
handset, the essage “PLEASE REGISTER THIS HANDSET” will appear on the
display, and five short error beeps will be heard. You ust first register the cordless
handset you want to add to the syste .
• If you try to register a cordless handset which you have already added to the syste ,
the five short error beeps will be heard and the registration will be canceled.
• If the registration is unsuccessful, “ERROR” will appear on the display, and five short
error beeps will be heard after (PGM) is pressed in step 4. Move all the cordless
handsets closer to the base phone, and then start over the procedure.
To check the station number assigned to the additional
cordless handset
The station nu ber of the cordless handset appears on
the display of the cordless handset while it is seated on
the charger. You can also utilize the supplied sticker of
the station nu ber and attaching on the cordless
handset. (For details, see Operating Instructions of
SPP-H273.)
Registering additional cordless handsets (continued)
HANDSET 2
RING OFFMASSAGEOLDNEW
System ID

SPP-S2730
10
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-2. CABINET (REAR)
3-3. HAND MAIN BOARD
2 two screws (BTP2.6 × 12)
4 two claws
1 lid, battery case
5 cabinet (rear)
3 two claws
2 three screws
(BTP2.6
× 8)
4
3
7 HAND MAIN boar
d
6 button (VOL. H)
5 cover (antenna. H)
cover (head set jack)
1 connector
(CN1)
Set Cabinet (rear) Hand Main Board
Base Cabinet (lower) Assy Base Main BoardBase Key Board

SPP-S2730
11
3-4. BASE CABINET (LOWER) ASSY
3-5. BASE KEY BOARD
1 four screws (P3 × 10)
3 connector
(CN172)
2
5 base cabinet (lower) ass
y
4 two connectors
(CN301, CN302)
1 ten screws
(BTP2.6
× 8)
2 BASE KEY boar
d

SPP-S2730
12
3-6. BASE MAIN BOARD
2 four screws
(BTP2.6 × 8)
3 BASE MAIN board
1 Remove two solders.

13
SPP-S2730
SECTION 4
TEST MODE
BASE UNIT
[ENTERINGTHE TEST MODE]
1. Turn the power on.
2. Press three keys of [2], [6], and [ERASE] simultaneously.
3. When the test mode becomes active, the LCD displays as be-
low along with an acknowledged tone. (Idling status of test
mode)
4. Pressing either key in the following table causes the mode as-
sociated with the pressed key to be activated.
Key Mode Items
[1] TEST A Manufacturing mode
[3] TEST C Electrical adjustment mode
[4] TEST D RF control mode
[5] TEST E EEPROM read/write mode
[6] TEST F DSP control mode
[7] TEST B Writing the ID numbers
[ERASE] Erase Initialize the EEPROM
5. To return the idling status, press the [VOL --] key.
[RELEASINGTHE TEST MODE]
Disconnect the power.
[DETAIL OF EACH MODE]
1. TEST MODE A (Manufacturing mode)
In the test mode idling status, press the [1] key to active this mode
and display “TEST A”.
1-1. KeyTest
1. In the “TESTA” status, press the [1] key to active the key test
and display “TEST A KEY”.
2. Press the key following order.
[1]t[2]t[3]t[4]t[5]t[6]t[7]t[8] t[9] t
[*] t[0] t[#] t[VOL +] t[VOL --] t
[PROGRAM] t[ERASE] t[EZ ACCESS] t
[REDIAL PAUSE] t[CALL WAITING FLASH] t
[INTERCOM]t[HOLD]t[SPEAKERPHONE]
3. When this test finished, a completion tone is generated and
the base unit returns to the initial test mode “TEST A” and
waits for a command.
Also, pressing the keys in wrong order causes the set to be
returned to the initial status.
1-2. Jog and Hook SwitchTest
1. In the “TESTA” status, press the [2] key to active the jog and
hook switch test and display as below.
2. In this test mode, rotate the jog dial up/down or press the jog
dial, or turn on/off the hook switch to respective status will be
displayed on the LCD as follows.
Up the jog dial : “UP” is displayed on the second line.
Down the jog dial : “DN” is displayed on the second line.
Press the jog dial : “P” is displayed on the second line.
Turn on the hook SW : “ON” is displayed on the third line.
Turn off the hook SW : “OFF” is displayed on the third line.
1-3. LCD and LEDTest
In the “TEST A” status, press the [3] key to active the LCD and
LED test and display as below along with the LCD back light and
[NEW CALL]/[VOICE MAIL] LEDs blink alternately.
Note: “NEW”/“MESSAGE” and “OLD”/“RING OFF” blink alternately
2. TEST MODE C (TX Power Measurement Mode)
In the test mode idling status, press the [3] key to active this mode
and display “TEST C”.
1. In the “TEST C” status, press the [1] key to active the TX
power measurement mode and transmit the single carrier con-
tinuously.
2. In this status, setting can be changed by entering the following
keys (not displayed).
[1] : Select main antenna
[3] : Select sub antenna
[7] : Select channel 5
[8] : Select channel 28
[9] : Select channel 50
3. TEST MODE D (RF Control Mode)
In the test mode idling status, press the [4] key to active this mode
and display “TEST D”.
In this mode, TX power level,TX power on/off, bit error late (fixed
at OF), channel number,LQ, mode, RSSI and RXST are displayed
on the LCD as below. Each setting can be changed by entering the
following keys. (default: TX on, master mode)
[1] : Lowers the channel
[3] : Raises the channel
[4] : Turns on/off the TX
[6] : Switches the mode to master/slave
[7] : Switches the TX power to Lo/ML/MH/Hi
[9] : Switches the antenna to main/sub (not displayed)
JK DSP=V3 0425to
FONT=NEW
S2730
display example
TEST A JOG
UP
OFF
display example
display
[NEW][OLD][MESSAGE][RING OFF]
PW=Hi TXON BR=0F
CH= 5 LQM=3F Mst
RSSI=3F STS= 0
display example

14
SPP-S2730
4. TEST MODE E (EEPROM Read/Write Mode)
In the test mode idling status, press the [5] key to active this mode
and display as below.
[]: hexadecimal number (initial values are all blank)
Refer to following table for key assignment.
Key Assignment
[0] to [9] input 0 to 9
[EZ ACCESS] input A
[REDIAL PAUSE] input B
[CALL WAITING FLASH] input C
[INTERCOM] input D
[HOLD] input E
[SPEAKERPHONE] input F
[PROGRAM] check sum
[#] enter
[*] reset
Enter the data associated with each address by referring to the
“EEPROM data” in the following table.
Writing procedure:
1. Input the address number (3 digit) of EEPROM.
2. Press the [#] key to enter the address number and display read
data (8 digit=4 byte).
3. If rewrite the data, input the rewriting data (8 digit=4 byte).
4. Press the [#] key to enter the rewriting data.
5. To release this mode, press the [VOL --] key.
EEPROM data:
Address Data (hexadecimal)
(hexadecimal) 1st byte 2nd byte 3rd byte 4th byte
754 (ID1) (ID2) F6 (C-sum)
714 81 01 00 (C-sum)
718 03 05 0C (C-sum)
71C C2 C0 00 (C-sum)
720 A9 3D 1C (C-sum)
724 48 C7 04 (C-sum)
728 50 03 51 08
72C 52 08 54 0D
730 5A 06 5D 02
734 60 0B 66 0F
738 70 07 FF 83
73C FF FF FF (C-sum)
740 FF FF FF (C-sum)
744 FF FF FF (C-sum)
690 90 E8 2A (C-sum)
694 6A AA 01 (C-sum)
794 01 00 00 (C-sum)
Contents of EEPROM data:
Address Data (hexadecimal)
(hexadecimal) 1st byte 2nd byte 3rd byte 4th byte
754 ID1 ID2 RF parameter C-sum
714 reserved C-sum
718 audio parameter RF parameter C-sum
71C reserved C-sum
720 RF parameter C-sum
724 audio parameter C-sum
728
72C
730 RF parameter
734
738
73C C-sum
740 reserved C-sum
744 C-sum
690 audio parameter C-sum
694 C-sum
794 H-No. reserved C-sum
Note:
ID1, ID2 : ID numbers in hexadecimal notation (refer to “6. TEST MODE
B”)
C-sum : Check sum value (After entering the data up to 3 bytes, press
the [PROGRAM] key to start automatic calculation.)
H-No. : Number of registered handset
5. TEST MODE F (DSP Control Mode)
In the test mode idling status, press the [6] key to active this mode
and display “TEST F”.
5-1. Speaker Path Test 1
In the “TEST F” status, press the [4] key to active the speaker path
test 1. In this mode, it activates phone line path when IC402 pin
0(MIC GAIN CONT) is “L” and IC402 pin uj (H/S TALK GAIN
CONT) is “H”.
5-2. Speaker Path Test 2
In the “TEST F” status, press the [5] key to active the speaker path
test 2. In this mode, it activates phone line path when IC402 pin
0(MIC GAIN CONT) is “H” and IC402 pin uj (H/S TALK GAIN
CONT) is “L”.
In this mode, it operates as follows.
•When the [*] key is pressed, it outputs the DTMF “5”.
•When the [#] key is pressed, it outputs the DP “0”.
5-3. Local Handset Path Test
In the “TEST F” status, press the [6] key to active the local hand-
set path test. In this mode, it activates local handset path immedi-
ately.
In this mode, it operates as follows.
•When the [7] key is pressed, it becomes volume level is maxi-
mum.
•When the [8] key is pressed, it becomes volume level is middle.
•When the [9] key is pressed, it becomes volume level is mini-
mum.
•When the [0] key is pressed, it becomes muting on.
EEPROM ADRS=[][][]
Read Dt=[][][][][][][][]
WriteDt=[][][][][][][][]
display example

15
SPP-S2730
6. TEST MODE B (Writing the ID number)
Note: Though the “TEST MODE E” handles the ID numbers as hexa-
decimal numbers, the “TEST MODE B” handles them as decimal
numbers. Both are different in numerical notation format only, and
net values are same.
The ID numbers written on the bottom of base unit are decimal
numbers, and accordingly use the “TEST MODE B” when enter-
ing the ID numbers.
In the test mode idling status, press the [7] key to active this mode
and display as below.
*: Already registered ID number
[]: Inputted ID number (initial values are all blank)
IF a wrong ID number was entered by mistake, press the [VOL--]
key to return to the test mode idling status, then re-enter correct
ID number.
7. INITIALIZETHE EEPROM
In the test mode idling status, EEPROM (IC303) is all cleared
except VP setting value when the [ERASE] key is pressed.
When execute this operation, it erases stored data (phone dictio-
nary, caller ID, message data).
HANDSET
[ENTERINGTHE TEST MODE]
1. Connect the power.
2. Press three keys of [2], [6], and [ERASE] simultaneously.
3. When the test mode becomes active, the LCD displays as be-
low along with an acknowledged tone. (Idling status of test
mode)
4. Pressing either key in the following table causes the mode as-
sociated with the pressed key to be activated.
Key Mode Items
[1] TEST A Manufacturing mode
[3] TEST C Electrical adjustment mode
[4] TEST D RF control mode
[5] TEST E EEPROM read/write mode
[7] TEST B Writing the ID numbers
[ERASE] Erase Initialize the EEPROM
5. To return the idling status, press the [OFF] key.
[RELEASINGTHETEST MODE]
Disconnect the power.
[DETAIL OF EACH MODE]
1. TEST MODE A (Manufacturing mode)
In the test mode idling status, press the [1] key to active this mode
and display “TEST A”.
1-1. KeyTest
1. In the “TESTA” status, press the [1] key to active the key test
and display “TEST A KEY”.
2. Press the key following order.
[TALK]t[OFF]t[HOLD]t[INTERCOM]t[1]t[2]t
[3]t[4]t[5]t[6]t[7]t[8]t[9]t[*]t[0]t[#]t
[CALL WAITING FLASH]t[EZ ACCESS]t[ERASE]t
[REDIAL PAUSE]t[PGM]
3. When this test finished, a completion tone is generated and
the base unit returns to the initial test mode “TEST A” and
waits for a command.
Also, pressing the keys in wrong order causes the set to be
returned to the initial status.
JK 0425to
FONT=NEW
S2730
display example
TEST B 224******
ID=224[][][][][][]
display example

16
SPP-S2730
1-2. JogTest
1. In the “TEST A” status, press the [2] key to active the jog test
and display as below.
2. In this test mode, rotate the jog dial up/down or press the jog
dial to respective status will be displayed on the LCD as fol-
lows.
Up the jog dial : “UP” is displayed on the second line.
Down the jog dial : “DN” is displayed on the second line.
Press the jog dial : “P” is displayed on the second line.
1-3. LCD and LEDTest
In the “TEST A” status, press the [3] key to active the LCD and
LED test and display as below along with the LCD back light and
key illumination LED blink alternately.
Note: “NEW”/“MESSAGE” and “OLD”/“RING OFF” blink alternately
2. TEST MODE C (TX Power Measurement Mode)
In the test mode idling status, press the [3] key to active this mode
and display “TEST C”.
1. In the “TEST C” status, press the [1] key to active the TX
power measurement mode and transmit the single carrier con-
tinuously.
2. In this status, setting can be changed by entering the following
keys (not displayed).
[1] : Set TX power to middle/low
[3] : Set TX power to high
[7] : Select channel 5
[8] : Select channel 28
[9] : Select channel 50
3. TEST MODE D (RF Control Mode)
In the test mode idling status, press the [4] key to active this mode
and display “TEST D”.
In this mode, TX power level,TX power on/off, bit error late (fixed
at OF), channel number, LQ, mode, RSSI and RXST are displayed
on the LCD as below. Each setting can be changed by entering the
following keys. (default: TX on, slave mode)
[1] : Lowers the channel
[3] : Raises the channel
[4] : Turns on/off the TX
[6] : Switches the mode to master/slave
[7] : Switches the TX power to Lo/ML/MH/Hi
4. TEST MODE E (EEPROM Read/Write Mode)
In the test mode idling status, press the [5] key to active this mode
and display as below.
[]: hexadecimal number (initial values are all blank)
Refer to following table for key assignment.
Key Assignment
[0] to [9] input 0 to 9
[HOLD] input A
[INTERCOM] input B
[CALL WAITING FLASH] input C
[EZ ACCESS] input D
[ERASE] input E
[REDIAL PAUSE] input F
[PGM] check sum
[#] enter
[*] reset
Enter the data associated with each address by referring to the
“EEPROM data” in the following table.
Writing procedure:
1. Input the address number (3 digit) of EEPROM.
2. Press the [#] key to enter the address number and display read
data (8 digit=4 byte).
3. If rewrite the data, input the rewriting data (8 digit=4 byte).
4. Press the [#] key to enter the rewriting data.
5. To release this mode, press the [OFF] key.
TEST A JOG
UP
display example
display
[NEW][OLD][MESSAGE][RING OFF]
PW=Hi TXON BR=0F
CH= 5 LQM=3F Slv
RSSI=3F STS= 0
display example
EEPROM ADRS=[][][]
Read Dt=[][][][][][][][]
WriteDt=[][][][][][][][]
display example

17
SPP-S2730
EEPROM data:
Address Data (hexadecimal)
(hexadecimal) 1st byte 2nd byte 3rd byte 4th byte
004 (ID1) (ID2) F6 (C-sum)
0E0 A9 3D 1C FD
008 50 03 51 08
00C 52 08 54 0D
010 5A 06 5D 02
014 60 0B 66 0F
018 70 07 FF 83
01C FF FF FF FF
020 FF FF FF FF
024 FF FF FF FF
0D8 01 01 80 (C-sum)
Contents of EEPROM data:
Address Data (hexadecimal)
(hexadecimal) 1st byte 2nd byte 3rd byte 4th byte
004 ID1 ID2 RF parameter C-sum
0E0 C-sum
008 C-sum
00C C-sum
010 C-sum
014 RF parameter C-sum
018 C-sum
01C C-sum
020 C-sum
024 C-sum
0D8 OWN-No. H-No. M-No. C-sum
Note:
ID1, ID2 : ID numbers in hexadecimal notation (refer to “5. TEST MODE
B”)
C-sum : Check sum value (After entering the data up to 3 bytes, press
the [PROGRAM] key to start automatic calculation)
OWN-No.: Self number of handset
H-No. : Number of registered handset
M-No. : Number of model destination (SPP-S2730: 80h)
5. TEST MODE B (Writing the ID number)
Note: Though the “TEST MODE E” handles the ID numbers as hexa-
decimal numbers, the “TEST MODE B” handles them as decimal
numbers. Both are different in numerical notation format only, and
net values are same.
The ID numbers written on the bottom of base unit are decimal
numbers, and accordingly use the “TEST MODE B” when enter-
ing the ID numbers.
In the test mode idling status, press the [7] key to active this mode
and display as below.
*: Already registered ID number
[]: Inputted ID number (initial values are all blank)
IF a wrong ID number was entered by mistake, press the [OFF]
key to return to the test mode idling status, then re-enter correct
ID number.
TEST B 224******
ID=224[][][][][][]
display example
6. INITIALIZETHE EEPROM
In the test mode idling status, EEPROM (IC122) is all cleared
except VP setting value when the [ERASE] key is pressed.
When execute this operation, it erases stored data (phone dictio-
nary, caller ID, message data).

18
SPP-S2730
RFTESTING
This test is for checking the RF system without disassembling the
set in servicing. Perform measurement using the spectrum ana-
lyzer and jig antenna.
RF Testing method:
Please follow the below instruction to perform RF test.
For the detail of test mode, Refer to the each items of “BASE
UNIT Section” and “HANDSET Section”.
1. TRANSMISSION CHECK
1-1. Setting
Connect a receiving antenna to RF INPUT of Spectrum analyzer
and set the unit 10 cm (4 inches) away from the receiving antenna.
Measuring tool: Spectrum analyzer (equivalent to HP8595E)
Jig : Receiving antenna (for Spectrum analyzer)
1-2. Transmission Waveform Check
Purpose:
It is necessary to check spectrum wave of transmission wave which
is an important factor in order to confirm operational performance
of Spread Spectrum models. If this wave deviates from correct
wave form, normal data transmission cannot be made and, as a
result of that, possibility that occurrence of mute increases and
communication distance becomes shorter will increase.
Spectrum analyzer setting:
Center frequency: 2440.5 MHz
Span : 10 MHz
RBW : 100 kHz
VBW : 100 kHz
Ref Level : 0 dBm
ATT : 10 dB
Jig antenna
(Utilize the antenna for handset)
Spectrum
analyzer
10 cm
Spectrum
analyzer
10 cm
Test mode setting:
– Base Unit –
1. Press three keys of [2], [6], and [ERASE] simultaneously to
enter the test mode.
2. Press the [4] key to activate test mode D and display “TEST
D”. (TX on)
3. Press the [1] or [3] key to change the channel to 28.
– Handset –
1. Press three keys of [2], [6], and [ERASE] simultaneously to
enter the test mode.
2. Press the [4] key to activate test mode D and display “TEST
D”. (TX on)
3. Press the [6] key to set master.
4. Press the [1] or [3] key to change the channel to 28.
Test mode setting is complete, check that the waveform on spec-
trum analyzer is displayed as below.
Measuring:
1. Maximum hold the waveform.
2. Set the maker to the peak of waveform with the Peak Search
function.
3. Measure the frequency width of points 6 dB and 20 dB lower
from the peak with the Delta Marker function. (refer to below
figure)
Specifications:
A(width of –6 dB points) : more than 1.4 MHz
B(width of –20 dB points) : more than 1.8 MHz
REF 0.0 dBm
10dB/
CENTER 2.44050 GHz
*RBW 100 kHz *VBW 100 kHz *ATT 10dBSWP 20 ms SPAN 10.00 MHz
A_View B_Blank NormNorm
REF 0.0 dBm MK∆–510 kHz
10dB/ A_View B_Blank Norm –5.44 dBPosi
DELTA MKR
–510 kHz
CENTER 2.44050 GHz
*RBW 100 kHz *VBW 100 kHz *ATT 10dBSWP 20 ms SPAN 10.00 MHz
PEAK
–6dB
–20dB
A
B
Ver 1.1

19
SPP-S2730
1-3. TX Power Check
Spectrum analyzer setting:
Center frequency: 2440.5 MHz
Span : 10 MHz
RBW : 3 MHz
VBW : 1 MHz
Ref Level : 0 dBm
ATT : 10 dB
Test mode setting:
–Base Unit –
1. Press three keys of [2], [6], and [ERASE] simultaneously to
enter the test mode.
2. Press the [4] key to activate test mode D and display “TEST
D”. (TX on, main antenna)
3. Press the [1] or [3] key to change the channel to 28.
–Handset –
1. Press three keys of [2], [6], and [ERASE] simultaneously to
enter the test mode.
2. Press the [4] key to activate test mode D and display “TEST
D”. (TX on)
3. Press the [6] key to set master.
4. Press the [1] or [3] key to change the channel to 28.
Test mode setting is complete, check that the waveform on spec-
trum analyzer is displayed as below.
Measuring:
–Base Unit –
1. Maximum hold the waveform. (refer to below figure)
2. Set the maker to the peak of waveform with the Peak Search
function and read that value. (main antenna)
3. Press the [9] key to switch the antenna mode to “sub”.
4. Set the maker to the peak of waveform with the Peak Search
function and read that value. (sub antenna)
–Handset –
1. Maximum hold the waveform. (refer to below figure)
2. Set the maker to the peak of waveform with the Peak Search
function and read that value. (TX power: Hi)
3. Press the [7] key twice to switch the TX power level to “ML”.
4. Set the maker to the peak of waveform with the Peak Search
function and read that value. (TX power: ML)
REF 0.0 dBm
10dB/
CENTER 2.44050 GHz
*RBW 3 MHz *VBW 1 MHz *ATT 10dBSWP 20 ms SPAN 10.00 MHz
A_View B_Blank NormNorm
Specifications: (peak level of waveform)
–Base Unit –
Main antenna mode: more than –30 dBm
Sub antenna mode : more than –30 dBm
–Handset –
TX power level is Hi : more than –30 dBm
TX power level is ML: more than –40 dBm
2. RECEIVING CHECK
2-1. Setting
Put two units of the base unit and handset nearby. (on the one
desk)
2-2. Link check of Between Base Unit and Handset
Procedure:
1. Press three keys of [2], [6], and [ERASE] on the base unit
simultaneously to enter the test mode, and press the [4] key to
activate test mode D and display “TEST D”.
Perform this process for the handset at the same manner to
activate test mode D and display “TEST D”.
(base unit: master mode, handset: slave mode)
2. Check the display of LCD on both base unit and handset.
“STS=0011”is displayed when the base unit and handset are
linked normally.
Display:
STS=0011 : OK
STS=1x0x : NG (x: 0 or 1)
3. Press the [6] keys of base unit and handset to switch modes.
(base unit: master mode →slave mode, handset: slave mode
→master mode)
4. In this status (master/slave relation of base unit and handset is
reversed), check the display of LCD on both base unit and
handset as same as step 2.
Display:
STS=0011 : OK
STS=1x0x : NG (x: 0 or 1)
REF –10.0 dBm MKR 2.44076 GHz
10dB/
CENTER 2.44050 GHz
*RBW 3 MHz *VBW 1 MHz *ATT 10dBSWP 20 ms SPAN 10.00 MHz
A_View B_Blank Norm –14.52 dBmPosi
MARKER
2.44076 GHz
Ver 1.1

20
SPP-S2730 SECTION 5
ELECTRICAL ADJUSTMENTS
0 dBm = 0.775 V
BASE UNIT
•Make the set in the test mode. (See page 13)
1. Power FailureTest
Procedure:
1. Connect between TP338 and TP306 (GND) on the BASE
MAIN board by lead wire.
2. In the test mode idling status, press the [1] key to display
“TEST A”.
3. Check that the [NEW CALL] LED on the base unit lights up
when connect between TP203 and TP306 (GND) on the BASE
MAIN board.
2. Ring DetectionTest
Procedure:
1. In the “TEST A” status, connect the base unit to telephone
line.
2. Check that the LCD back light on the base unit lights up when
call the base unit.
3. Line Closing of Parallel Connected Another Tel-
ephone Detection (On Hook)Test
Procedure:
1. In the “TEST A” status, connect the base unit to telephone
line.
2. Connect this set and another telephone in parallel to one tel-
ephone line.
3. Check that the [NEW CALL] LED on the base unit lights up
when take up the receiver of another telephone.
4. Automatically Hold CancelingTest
Procedure:
1. In the test mode idling status, press the [4] key to display
“TEST D”.
2. Connect the base unit and another telephone in parallel to one
telephone line.
3. Take up the local handset of base unit, and press the [HOLD]
key to hold.
4. Check that the [NEW CALL] LED on the base unit lights up
when take up the local handset of another telephone.
5. C-ID Input Level Measurement
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the test mode idling status, press the [6] key to display
“TEST F”.
3. Set the output level of audio analyzer to –17 dBm (1.2 kHz,
LPF=30 kHz ON).
4. Check that the value of audio analyzer is –15 to –21 dBm.
5. Between Microphone and Line Signal Level
Measurement
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the test mode idling status, press the [6] key to display
“TEST F”, and press the [5] key to set the speaker path test 2
mode.
3. Set the output level of audio analyzer to –27 dBm (1.2 kHz,
LPF=30 kHz ON).
4. Check that the value of audio analyzer is –2 to –8 dBm.
5. Press the [VOL --] key to return the test mode idling status.
Press the [6] key to display “TEST F” again, and press the [4]
key to set the speaker path test 1 mode.
6. Change the output level of audio analyzer to –36 dBm.
7. Check that the value of audio analyzer is –2 to –8 dBm.
7. Between Line and Speaker Signal Level Measure-
ment
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the test mode idling status, press the [6] key to display
“TEST F”, and press the [4] key to set the speaker path test 1
mode.
3. Set the output level of audio analyzer to –27 dBm (1.2 kHz,
LPF=30 kHz ON).
4. Check that the value of audio analyzer is –2 to –8 dBm.
Base unitfeeding bridge
Trunk
Line
Line
Input
TP101
TP102
TP413
TP306 (GND)GND
Output
audio analyzer
1.2 kHz, –17 dBm
LPF: 30 kHz ON
10 µF
Base unitfeeding bridge
Trunk
Line
Line
Output
TP101
TP102
TP475
TP306 (GND)GND
Input
audio analyzer
1.2 kHz, –27 dBm
LPF: 30 kHz ON
600 Ω
+
100 µF
100 µF
Base unitfeeding bridge
Trunk
Line
Line
Input
TP101
TP102
TP476
TP477 (SP GND)GND
Output
audio analyzer
1.2 kHz, –27 dBm
LPF: 30 kHz ON
16 Ω