Sony SPP-N1025 - Cordless Telephone User manual

SERVICE MANUAL US Model
SPP-N1025
Canadian Model
SPP-N1026
SPECIFICATIONS
SPP-N1025/N1026
Ver 1.1 2001.12
9-873-224-02 Sony Corporation
2001L0500-1 Personal Audio Company
C2001.12 Published by Sony Engineering Corporation
CORDLESS TELEPHONE
Photo: SPP-N1025
General
Operating frequency
Base phone: 902-905 MHz (310 W)
Hand set: 925-928 MHz (400 W)
Operating channel
10 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adaptor AC-T122
Telephone line cord
Rechargeable battery pack BP-T18
Wall bracket
Directory
Handset
Power source
Rechargeable battery pack BP-T18
Battery life
Standby: Approx. 7 days
Talk: Approx. 7 hours
Dimensions
Approx. 2
1⁄4 x 1 7⁄8 x 7 1⁄4 inches (w/h/d),
antenna excluded
(approx. 55 x 47 x 183 mm)
Antenna: Approx. 1 3⁄8 inches
(approx. 34 mm)
Mass
Approx. 7.7 oz (approx. 220 g), battery
included
Base phone
Power source
DC 9V from AC power adaptor AC-T122
Battery charging time
Approx. 12 hours
Dimensions
Approx. 7 x 2 1⁄4 x 7 1⁄2 inches (w/h/d),
antenna excluded
(approx. 175 x 57 x 190 mm)
Antenna: Approx. 6 1⁄ 8 inches
(approx. 153 mm)
Mass
Approx. 13.5 oz (approx. 382 g), wall
bracket excluded
Design and specifications are subject to
change without notice.

2
SPP-N1025/N1026
TABLE OF CONTENTS
1. SERVICING NOTES............................................... 3
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. H/S Rear Assy ................................................................. 6
3-3. H/S FRT Assy.................................................................. 7
3-4. HAND MAIN Board....................................................... 7
3-5. Base Bottom .................................................................... 8
3-6. BASE MAIN Board ........................................................ 8
4. TEST MODE.............................................................. 9
5. DIAGRAMS
5-1. Block Diagram – BASE UNIT Section –...................... 13
5-2. Block Diagram – HANDSET Section – ........................ 14
5-3. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 15
5-4. Schematic Diagram – BASE MAIN Board (1/2) –....... 16
5-5. Schematic Diagram – BASE MAIN Board (2/2) –....... 17
5-6. Printed Wiring Board – BASE MAIN Board –............. 18
5-7. Printed Wiring Board – BASE KEY Board – ............... 19
5-8. Schematic Diagram – BASE KEY Board – .................. 19
5-9. Printed Wiring Board – HAND MAIN Board – ............ 20
5-10. Schematic Diagram – HAND MAIN Board – .............. 21
5-11. IC Pin Function Description ........................................... 22
6. EXPLODED VIEWS
6-1. Hand Set Section ............................................................. 24
6-2. Base Set Section.............................................................. 25
7. ELECTRICAL PARTS LIST ............................... 26
Notesonchipcomponentreplacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat. 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.
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.

3
SPP-N1025/N1026
SECTION 1
SERVICING NOTES
NOTE FOR REPLACEMENT OF THE EEPROM
The ID cord is written in the EEPROM.
When replacing the EEPROM, U6 on the BASE MAIN board and
U4 on HAND MAIN board should be replaced together as a pair.
(Part No. X-3381-018-1)
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 func-
tion.
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 [PGM] key.
2. Select the “DIAL MODE” menu by pressing v or V keys.
3. Press the key sequence [SELECT], [2], [1], [0], [4].
4. When enter the test mode, happy tone is emitted, and the LCD
displays as shown below.
5. Press the key sequence [#], [2], [1], [1], [0] just after power
ON.
6. When enter the test mode, the [SPEAKERPHONE] LED and
[INTERCOM] LED light up, and happy tone is emitted.
7. Disconnect the power of the handset B, then connect the power
again.
8. Disconnect the power of the base unitA, then connect the power
again.
9. Cradle the handset B on the base unit A to charge the battery
of handset B for about 1 minute.
10. Press the [TALK] key of the handset B and join the base unit
A.
11. When joining is successful, the handset B is normal. But when
it fails, charge the battery of the handset B again.
12. Next, repeat the step 1 to step 9 with the handset A and base
unit B
13. When joining is successful with handset A and base unit B,
base unit B is normal and handset B is faulty.
ABOUT U7 ON THE BASE MAIN BOARD
U7 (Part No. 6-800-854-01) on the BASE MAIN board which has
board shape as shown below, is different from regular ICs in shape.

4
SPP-N1025/N1026
NOTE FOR REPAIRING AND REPLACEMENT OF THE
NEWTYPE BOARD
When a new type board is damaged or out of order, do not repair
that board, but replace with an former type board (BASE MAIN
board : Part No. A-3062-834-A, HAND MAIN board : Part No.
A-3062-832-A (N1025)/A-3062-877-A(N1026)). In this case, re-
move the EEPROM (BASE MAIN board : Ref No. U6, HAND
MAIN board : Ref No. U4) from the new type board and install it
on the former type board as a replacement.
NEW/FORMER TYPE DISCRIMINATION
In this set with the following serial No. or later BASE MAIN and
HAND MAIN boards have been changed.
SPP-N1025 : Serial No. 0207433 or alter
SPP-N1026 : Serial No. A0106801 or later
Serial No.
Serial No.
Bottom View
Bottom View Lid Battery
U6
–BASE MAIN BOARD (Conductor Side) –
U4
Former Type
–HAND MAIN BOARD (Component Side) –
U4
New Type
Ver 1.1

5
SPP-N1025/N1026
SECTION 2
GENERAL This section is extracted from
instruction manual.
Getting Started
14US
1
2
3
4
5
6
7
8
9
0
qa
qs
qd
qf
qg
Identifying the parts
Refer to the pages indicated in parentheses for details.
Base Phone
1VOICE MAIL lamp (p. 47)
Flashes when you have messages.
2NEW CALL lamp (p. 39)
Flashes when there is a “NEW”
data in the Caller ID list.
3Dialing keys
4HOLD button (p. 20, 33)
Press to put a call on hold.
5CHARGE lamp (p. 9, 19)
Lights while the battery is being
charged.
6SPEAKERPHONE button
(p. 20, 22)
Press to make or receive a call with
the base phone.
This button keeps lit until you are
done talking.
7LINE lamp (p. 18, 22)
Lights when the handset is in use.
8MIC (microphone)
9INTERCOM button/lamp
(p. 36)
Used to make an intercom call.
The INTERCOM lamp on this
button keeps lit until you are done
talking.
0VOLUME +/– buttons (p. 20, 22)
Adjusts the speaker volume.
qa SPEED DIAL button (p. 25)
Used to make a call with speed
dialing.
qs PGM (Program) button (p. 25)
Used to store numbers for speed
dialing.
qd REDIAL/PAUSE button (p. 21)
Redials the last number called/
inserts a pause in the dialing
sequence.
qf RINGER switch (p. 32)
Used to adjust the ringer volume
level of the base phone.
qg CALL WAITING/FLASH button
(p. 20)
Switches to a second call if you
have “call waiting” service.
Getting Started
15
US
Getting Started
qk
qh
qj
ql
continued
qh Antenna (p. 7, 49)
qj Speaker (p. 20, 22)
qk DC IN 9V jack (p. 7)
ql LINE (telephone line) jack
(p. 7)
Getting Started
16US
Handset
1Antenna
2Speaker
3Jog lever (p. 11, 23, 30, 31, 39)
4HOLD button (p. 18, 34)
Press to put a call on hold.
5TALK button (p. 18, 21, 22, 24,
33, 37)
Lets you make or receive a call.
6Battery compartment (p. 9)
7
8
9
3
qa
q;
5
4
2
1
6
Identifying the parts (continued)
7Display (p. 11, 38)
8OFF button (p. 18, 22, 33, 35)
Allows you to disconnect the call.
9Dialing keys
0CHANNEL button (p. 18)
Press to select a better channel.
qa Microphone
Getting Started
17
US
Getting Started
qh
qs
qf
qg
qd
qj
qk
ql
w;
qs FLASH button (p. 18, 46)
Switches to a second call if you
have “call waiting” service, or lets
you make a new call.
qd TONE button (p. 18)
Allows you to switch temporarily to
tone dialing.
qf ONE-TOUCH button (p. 23)
Used to make a call with one-touch
dialing.
qg INTERCOM button (p. 35)
Used to make an intercom call.
qh I(HEADSET) jack (p. 51)
qj SELECT button (p. 11 – 13, 23,
27, 31, 40, 42)
Press to enter the selection and
bring you to the next selection.
qk #button (p. 44)
Used to change the number of digits
of the phone number in the Caller
ID list.
ql REDIAL/PAUSE button
(p. 21, 24, 26, 28)
Redials the last number called/
inserts a pause in the dialing
sequence.
w; PGM (Program) button
(p. 11 – 13, 23, 27, 31, 47)
Press to start the procedure for
setting up the phone such as
choosing the dialing mode.
Also used to store the setting to
finish the procedure.

6
SPP-N1025/N1026
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
Set H/S rear assy H/S FRT assy HAND MAIN board
BASE MAIN board
Base bottom
Note: Follow the disassembly procedure in the numerical order given.
3-2. H/S REAR ASSY
5 Remove the H/S rear assy
in the direction of arrow
B .
1 Remove the battery lid
in the direction of arrow
A .
4 claw
3 two claws
3 two claws
2 two screws
(BTP3
× 10)
A
B

7
SPP-N1025/N1026
3-4. HAND MAIN BOARD
3-3. H/S FRT ASSY
4 two screws
(P2
× 5)
1 screw
(BTP2.6
× 8)
3 screw
(BTP2.6
× 8)
6 H/S FRT assy
5
2
5 screw
(BTP2.6
× 8)
9 HAND MAIN boar
d
7 screw (BTP2.6 × 8)
1 Remove two solders of lead.
4 Remove twelve solders.
3 Remove solder of lead.
6 RF unit (hand)
8 receiver BKT
2 speaker (2.8cm)

8
SPP-N1025/N1026
3-6. BASE MAIN BOARD
3-5. BASE BOTTOM
2 claw
2 claw
3 base bottom
1 five screws
(P3
× 12)
7 two screws
(BTP2.6
× 8
)
6 two screws
(BTP2.6
× 8)
0 six screws
(BTP2.6
× 8)
qa BASE KEY board
8 BASE MAIN board
4 RF unit (base)
2 harness
1 Remove solder of lead.
9 Remove two solders of lead.
3 screw
(P3
× 6)
5 Remove two solders.

9
SPP-N1025/N1026
7.
Condition: Press the [7] key.
Operation: TX data on, it only send security code change command
out if the transmitter power ON.
Indication:Beep tone is emitted.
8.
Condition: Press the [8] key.
Operation: Base DTMF test, it will send the dight 3 DTMF to line.
Indication:Beep tone is emitted and DTMF 3 gen. in line.
9.
Condition: Press the [9] key.
Operation: Stop DTMF test, it will stop the DTMF to line.
Indication:Beep tone is emitted and stop DTMF.
10.
Condition: Press the [0] key.
Operation: Base will receive the handset security code change
command and toggle the [LINE] LED.
Indication:Beep tone is emitted and [LINE] LED is flashed.
11.
Condition: Press the [*] key.
Operation: Stop the data transmit, but don't turn the TX power
OFF.
Indication:Beep tone is emitted.
12.
Condition: Press the [#] key.
Operation: Increase the current channel to next, if 30 back to 1.
Indication:Beep tone is emitted.
13.
Condition: Press the [REDIAL/PAUSE] key.
Operation: Generate current ringer.
Indication:Beep tone and ringer tone are emitted.
14.
Condition: Press the [FLASH] key.
Operation: Toggle hook pin, the hook pin defalt value in test mode
is low (hook off).
Indication:Beep tone is emitted.
15.
Condition: Press the [HOLD] key.
Operation: Rewrite the EEPROM defalt value, ringer=1, flash
type=3 dialing type=tone, security code=000, last
channel=1.
Indication:Beep tone is emitted.
16.
Condition: Press the [INTERCOM] key.
Operation: Toggle telsw pin, the telsw pin defalt value in test mode
is low.
Indication:Beep tone is emitted.
17.
Condition: Press the [PGM] key.
Operation: Enable the base to reprogram the security code. After
press the [PGM] key, the base will wait the security
code change command within 2 second. If received,
the base security code will be reprogram.
Indication:Beep tone is emitted and if received the command
gen.happy tone is emitted after reprogram security code.
SECTION 4
TEST MODE
Introduction
The manual test mode can be used for testing the RF and audio
sections of the base unit and handset. The manual test mode is
also required for the FCC testing in which the phone is tested for
interference at the first, middle, and last RF channels.
The following features are provided in manual test mode.
•Able to set operating mode of the combo chip.
•Able to mute or unmute the audio path.
•Able to change the RF channel. (Both RX and TX)
•Able to transmit or receive data packet.
•Able to synchronize the security code.
BASE UNIT
1. Entering the ManualTest Mode
1. Press the key sequence [#], [2], [1], [1], [0] just after power
ON.
2. When enter the test mode, the [SPEAKERPHONE] LED and
[INTERCOM] LED light up, and happy tone is emitted.
2. Default Settings
•Channel set to 14. (out of 0 to 29)
•Combo set to active mode.
•Speakerphone unmute.
•TX audio path unmuted.
•RX audio path unmuted.
•TX power ON.
•Off hooked.
•Date transmission disabled.
3. SPEAKERPHONE Key Operation
1.
Condition: Press the [1] key.
Operation: Toggle transmitter on/off, it only turn the TX power
on/off with no modulation.
Indication:Beep tone is emitted.
2.
Condition: Press the [2] key.
Operation: Toggle TX mute, it only toggle the TX path of combo
chip.
Indication:Beep tone is emitted.
3.
Condition: Press the [3] key.
Operation: Toggle mic mute pin, the mic mute pin defalt value in
test mode is high (mute).
Indication:Beep tone is emitted.
4.
Condition: Press the [4] key.
Operation: Toggle HF path switch function, the HF pin will be
toggle.
Indication:Beep tone is emitted.
5.
Condition: Press the [ ] key.
Operation: Toggle RX mute function, it only toggle the TX path
of combo chip.
Indication:Beep tone is emitted.
6.
Condition: Press the [6] key.
Operation: Toggle spk mute pin, the spk mute pin defalt value in
test mode is low (unmute).
Indication:Beep tone is emitted.

10
SPP-N1025/N1026
18.
Condition: Press the [SPEED] key.
Operation: Cleaar all two touch memory from EEPROM.
Indication:Beep tone is emitted.
19.
Condition: Press the [SPEAKERPHONE] key.
Operation: Release thetestmode.
Indication:Beep tone is emitted.
4. Data Link
Data bits are encoded in manchester format for which bit “0”is
represented by 500 µs low and 500 µs high while bit “1”by 500
µs high and 500 µs low.
If data transmission is enabled, it will transmit data packet with
the following fields continuously.
(“0”=500 µs low and “1”=500 µs high)
•8 bit preamble :0101010101010101
•8 bit word sync :0110010010010110
•20 bit security code :Restored from EEPROM
•4 bit reserved data :01010101
•8 bit command :0101010101010101
•8 bit data :0101010101010101
If data transmission is enabled, it will toggle the [LINE] LED every
time when a data packet is received. (No security code would be
checked)
HANDSET
1. Entering the ManualTest Mode
1. Press the [PGM] key.
2. Select the “DIAL MODE”menu by pressing v or V keys.
3. Press the key sequence [SELECT], [2], [1], [0], [4].
4. When enter the test mode, happy tone is emitted, and the LCD
displays as shown below.
2. Default Settings
•Channel set to 14. (out of 00 to 29)
•Combo set to active mode.
(0: inactive mode, 1: RX mode, 2: active mode)
•TX audio path unmuted. (0: unmuted, 1: muted)
•RX audio path unmuted. (0: unmuted, 1: muted)
•Date transmission disabled. (0: disabled, 1: enabled)
•Battery detection.
(“E”icon on: RSSI detection, “E”icon off: battery detection)
3. Key Definition
[1] key
Operation: Set combo to inactive mode.
Indication:CB=0
[2] key
Operation: Set combo to RX mode.
Indication:CB=1
[3] key
Operation: Set combo to active mode.
Indication:CB=2
[4] key
Operation: Increment channel by 1.
Indication:CH=CH+1
[ ] key
Operation: Mute TX audio path.
Indication:TxM=1
[6] key
Operation: Mute RX audio path.
Indication:RxM=1
[7] key
Operation: Decrement channel by 1.
Indication:CH=CH–1
[8] key
Operation: Mute TX audio path.
Indication:TxM=0
[9] key
Operation: Mute RX audio path.
Indication:RxM=0
[0] key
Operation: Start LCD segment test.
Indication:Various patterns shown on LCD for a few seconds.
[*] key
Operation: Set combo to active mode.
Enable data transmission.
Indication:DA=1
[#] key
Operation: Disable data transmission.
Indication:DA=0
[ONE TOUCH] key
Operation: Switch to RSSI detection.
Indication:“E”icon turns off.
[REDIAL] key
Operation: Switch to battery detection.
Indication:“E”icon turns on.
[OFF] key
Operation: Release the test mode.
Note: All keys pressed will emit the key tone.
4. Data Link
Data bits are encoded in manchester format for which bit “0”is
represented by 500 µs high and 500 µs low while bit “1”by 500
µs low and 500 µs high.
If data transmission is enabled, it will transmit data packet with
the following fields continuously.
(“0”=500 µs low and “1”=500 µs high)
•8 bit preamble :1010101010101010
•8 bit word sync :1001101101101001
•20 bit security code :Restored from EEPROM
•4 bit reserved data :10101010
•8 bit command :1010101010101010
•8 bit data :1010101010101010
No matter data transmission is enabled or not, it toggles the
“NEW”icon every time when a data packet is received. (No secu-
rity code would be checked)

11
SPP-N1025/N1026
Frequency AllocationTables
Base Unit Frequencies:
Channel Transmit Receive RX LO
Frequency Frequency Frequency
0 902.30 MHz 925.05 MHz 935.75 MHz
1 903.35 MHz 926.10 MHz 936.80 MHz
2 904.40 MHz 927.15 MHz 937.85 MHz
3 905.45 MHz 923.40 MHz 934.10 MHz
4 906.50 MHz 924.45 MHz 935.15 MHz
5 903.05 MHz 925.80 MHz 936.50 MHz
6 904.10 MHz 926.85 MHz 937.55 MHz
7 905.15 MHz 923.10 MHz 933.80 MHz
8 906.20 MHz 924.15 MHz 934.85 MHz
9 902.75 MHz 925.50 MHz 936.20 MHz
10 903.80 MHz 926.55 MHz 937.25 MHz
11 904.85 MHz 927.60 MHz 938.30 MHz
12 905.90 MHz 923.85 MHz 934.55 MHz
13 902.45 MHz 925.20 MHz 935.90 MHz
14 903.50 MHz 926.25 MHz 936.95 MHz
15 904.55 MHz 927.30 MHz 938.00 MHz
16 905.60 MHz 923.55 MHz 934.25 MHz
17 906.65 MHz 924.60 MHz 935.30 MHz
18 903.20 MHz 925.95 MHz 936.65 MHz
19 904.25 MHz 927.00 MHz 937.70 MHz
20 905.30 MHz 923.25 MHz 933.95 MHz
21 906.35 MHz 924.30 MHz 935.00 MHz
22 902.90 MHz 925.65 MHz 936.35 MHz
23 903.95 MHz 926.70 MHz 937.40 MHz
24 905.00 MHz 927.75 MHz 938.45 MHz
25 906.05 MHz 924.00 MHz 934.70 MHz
26 902.60 MHz 925.35 MHz 936.05 MHz
27 903.65 MHz 926.40 MHz 937.10 MHz
28 904.70 MHz 927.45 MHz 938.15 MHz
29 905.75 MHz 923.70 MHz 934.40 MHz
Handset Frequencies:
Channel Transmit Receive RX LO
Frequency Frequency Frequency
00 925.05 MHz 902.30 MHz 891.60 MHz
01 926.10 MHz 903.35 MHz 892.65 MHz
02 927.15 MHz 904.40 MHz 893.70 MHz
03 923.40 MHz 905.45 MHz 894.75 MHz
04 924.45 MHz 906.50 MHz 895.80 MHz
05 925.80 MHz 903.05 MHz 892.35 MHz
06 926.85 MHz 904.10 MHz 893.40 MHz
07 923.10 MHz 905.15 MHz 894.45 MHz
08 924.15 MHz 906.20 MHz 895.50 MHz
09 925.50 MHz 902.75 MHz 892.05 MHz
10 926.55 MHz 903.80 MHz 893.10 MHz
11 927.60 MHz 904.85 MHz 894.15 MHz
12 923.85 MHz 905.90 MHz 895.20 MHz
13 925.20 MHz 902.45 MHz 891.75 MHz
14 926.25 MHz 903.50 MHz 892.80 MHz
15 927.30 MHz 904.55 MHz 893.85 MHz
16 923.55 MHz 905.60 MHz 894.90 MHz
17 924.60 MHz 906.65 MHz 895.95 MHz
18 925.95 MHz 903.20 MHz 892.50 MHz
19 927.00 MHz 904.25 MHz 893.55 MHz
20 923.25 MHz 905.30 MHz 894.60 MHz
21 924.30 MHz 906.35 MHz 895.65 MHz
22 925.65 MHz 902.90 MHz 892.20 MHz
23 926.70 MHz 903.95 MHz 893.25 MHz
24 927.75 MHz 905.00 MHz 894.30 MHz
25 924.00 MHz 906.05 MHz 895.35 MHz
26 925.35 MHz 902.60 MHz 891.90 MHz
27 926.40 MHz 903.65 MHz 892.95 MHz
28 927.45 MHz 904.70 MHz 894.00 MHz
29 923.70 MHz 905.75 MHz 895.05 MHz
Security Code Synchronization
The following procedures should be followed if the security codes
of both unit do not match to each other.
1. Put the handset into manual test mode, making sure the channel
is set at 14 (default) out of 0 to 29.
2. Press the [*] key to start data transmission under which the
SC_SYNC command is sent continuously.
3. Put the base unit into manual test mode.
4. Before the base unit enters the manual test mode, it waits one
second for receiving SC_SYNC command from the handset.
If the command is received in the period, its security code will
be saved into EEPROM and then flash the [LINE] LED for
indication.

12
SPP-N1025/N1026
MEMO

SPP-N1025/N1026
1313
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM –BASE UNIT Section –
• SIGNAL PATH
: TX
: RX
: BELL
OPER 0TONE
REDIAL/
PAUSE
9
10
11
24
23
22
20
1
2
14
64
11
50
42
41
55
49
48
52
57 58 59 60 61
21
13
14
31
54
25
3
2
1
4
16
45
AF AMP
(FOR RX)
U2 (2/4)
AF AMP
(FOR DTMF)
U2 (4/4)
+5V
REGULATOR
U5
RESET SIGNAL
GENERATOR
Q5, 6
+
–
CHARGE
TERMINAL
DC IN 9V
–+
J3
9
10
AF AMP
(FOR TX)
U2 (1/4)
BUFFER
Q1
J7
HOOK ON/OFF
U8
D14 D16
D15 D7
T2
LINE TRANSFORMER
FREQUENCY SHIFT
KEYING DEMODULATOR
U3
X1
3.58MHz
B+
(+5V)
A1 RF UNIT
+
SYSTEM
CONTROLLER
U7
ANT TX AUDIO
PLL DATA
TX DATA
RX DATA
CAR DET
RX AUDIO
PLL CLK
PLL EN
DTMF
OUT
XIN XOUT
IN SE
IN P
IN N
M DAT
SCK
SD IN
INT
DCB RD
DC COMPA
SD OUT
IN DSP
IN DCN
TEL SWITCH
38 VOL1
39 VOL2
RX DATA
PLL DATA
PLL CLK
PLL EN
CAR DET
RI HI
RI LO
EE DI
EE CLK
EE CS
EE DO
OFF HOOK
PARK
FST CHG
DI
CLK
CS
DO
DCB RD
DCA
CIDINT
CIDSDA
CIDSCL
MDAT
53 TX DATA
MIC
MIC101
CHARGE
LED1
EEPROM
U6
CHARGE
CONTROL
Q2, 8
X2
8MHz
2322
XOUT XIN
CHARGE
DETECT
Q4
21RESET
CHRG LED
30 VOICE MAIL
LED4
WAIT LED
29 NEW CALL
LED2
N MSG LED
28 INTERCOM
LED8
INTCOM LED
27 SPEAKERPHONE
LED6
SPK LED
26 LINE
LED7
LINE LED
8
6
9
TEL LINE
SWITCH
U13 (3/4)
3
5
4
TEL LINE
SWITCH
U13 (2/4)
45
44
OFF
LOW
HIGH
33 – 36 3 – 8
ROW0 – ROW5
COL0 – COL3
KEY MATRIX
KEY1 – 17,
KEY19 – 22
SW1
RINGER
AF AMP
(FOR SPEAKER)
U2 (3/4)
12
11 10 9 7 5
6
23
26
2122
17
20
13
3
6
1
MIC
AMP
TX
ATTENUATOR
HYBRID
AMP
LEVEL
DETECTOR
RX
ATTENUATOR
FILTER
AMP
DIAL MODE
DETECTOR
ATTENUATOR
CONTROL CIRCUIT
MIC MICO
MUTE
TI TO 8
TLI2
RLI2
RECO
SPEAKER AMP
U14
SP101 OUTPUT1
OUTPUT2
INPUT+
2INPUT–
VOICE SPEAKERPHONE
U4
RI
HTI HTO+
HTO–
TLI1
RLI1
2
FI
VCI
1PD
13
1
43
63
2
SP SW
MIC MUTE
RINGER
RO LO
SPK MUTE
1
13
2
SPEAKER ON/OFF
SWITCH
U13 (1/4)
D13
D11
D10
40 VOL3
D9
7
MUTE
1
KEY16 KEY17 KEY22
HOLD
ABC 2
GHI 4
PQRS 7 WXYZ 9
JKL 5
TUV 8
MNO 6
DEF 3
KEY13 KEY 14 KEY15
CALL WAITING/
FLASH
KEY21
KEY 8KEY 7
KEY10 KEY11 KEY12 KEY20
#
KEY 9
KEY5KEY4
SPEED DIAL
KEY1KEY6
PGM
KEY2
VOLUME+
KEY3
–
KEY19
SPEAKERPHONE INTERCOM
LINE

SPP-N1025/N1026
1414
5-2. BLOCK DIAGRAM –HANDSET Section –
RF
5SDA
6SCL
19 –21, 28
22 –26
COL0 –COL3
ROW0 –ROW4
13 KEY INT
+
–
K1 –22,
SW1, 2
KEY MATRIX
LCD1
LIQUID CRYSTAL
DISPLAY MODULE
79 –94
COM0 –COM15
78 –32
SEG0 –SEG46
BUZ1
B+
BUZZER
DRIVE
Q4
CRADLE
DETECT
Q1
D2
D7
RECHARGEABLE
BATTERY PACK
(BP-T18)
3.6V 600mAh
SYSTEM
CONTROLLER
U2
SP1
J8
MIC1
D10 –12
A2
RF UNIT
TX DATA
PLL EN
PLL CLK
PLL I2C DATA
EARO
MIC
CAR DET/LOW BAT
RX DATA
29 TX DATA
14 PLL EN
15 PLL CLK
16 PLL I2C DATA
17 I2C CLK
12 CAR DET
11 RX DATA
EEPROM
U4
96V3
95V4
98V1
97V2
27BUZZER
30BACK LIGHT
9CRADLE
8RESET
X2
8MHz
2
XTIN
3
XTOUT
I
LED DRIVE
Q2
CHARGE
TERMINAL
RESET SIGNAL
GENERATOR
Q3, 5
+2.3V
REGULATOR
U3
D5, 6
(LCD BACK LIGHT)
D14 –17
(KEY BACK LIGHT)
VOL V
CID
1
K1 K2 K3
TALK2 ABC
4 GHI
7 PQRS 9 WXYZ
5 JKL
8 TUV
6 MNO
3 DEF
K16 SW1
K4 K5 K6
FLASH
K17
SELECT
K21
0 OPER
K10K11
K7 K8 K9
HOLD
K19
VOL v
DIR
#
K12 SW2
PAUSE
REDIAL
PGM
K14
OFF
K18
ONE TOUCH
K13
CHANNEL
K20K15
TONE
X1
32.768kHz
6
XTIN
7
XTOUT
•SIGNAL PATH
: TX
: RX
INTERCOM
K22
(N1026)

SPP-N1025/N1026
1515
5-3. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•z:Through hole.
•: Pattern from the side which enables seeing.
•: Carbon pattern.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthepatternfacesideseenfrom
(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.
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.
• % : indicates tolerance.
•C: panel designation.
•A: B+ Line.
• Powervoltagesaredc9V andfedwith regulateddcpower
supplyfrom externalpowervoltagejack(J3) ontheBASE
MAIN board, dc 12 V and fed with regulated dc power
supply from modular jack (J7) on the BASE MAIN board
with 100 Ωin series, and dc 3.6V and fed with regulated
dc power supply from battery terminal (J5) on the HAND
MAIN board.
• Voltages and waveforms are dc with respect to ground in
test mode.
• Voltages aretakenwith aVOM (Inputimpedance10 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.
• Circled numbers refer to waveforms.
• Signal path.
N: RX
O: TX
P: BELL
2.4Vp-
p
30.5 µs
3.9 Vp-
p
125 ns
3.9 Vp-
p
125 ns
•Waveforms
–BASE MAIN Board –
1U7 wd (XOUT)
1 V/DIV, 50 ns/DIV
–HAND MAIN Board –
qa U2 3(XOUT)
1 V/DIV, 50 ns/DIV
qs U2 7(XTOUT)
1 V/DIV, 20 µs/DIV
1 Vp-p
279 ns
2U3 5(XOUT)
500 mV/DIV, 100 ns/DIV
1
3
4
5
6
9
10
12
24
23
22
21
20
19
18
17
16
15
14
13
SELECT
SWITCH
SERIAL
INTERFACE
+
–
+
–
CRYSTAL
OSCILLATOR
REFERENCE
GENERATOR
7
+
–
+
–
+
–
11
SELECT
ADC
BAND PASS FILTER CAS DETECTOR
FSK RECEIVERBAND PASS FILTER
BAND PASS FILTER
DIAL TONE
ENERGY DETECTOR
DIAL TONE
DETECTOR
RING DETECTOR
DC MEASUREMENT
UNIT
DC B
DC A
ADC
+
–
DTMF
GENERATOR
D/A CONVERSION
AND FILTERING
MDAT
SCK
SDIN
SDOUT
INT
RESET
VDDP
VDDA
DTMFOUT
OUTDC
INDCN
INDCP
DCB RD
VDDD
XIN
XOUT
VSSD
VREF
INSE
INP
OUT
VSSA
INN
8
2DCCOMPA
•IC Block Diagrams
–BASE MAIN Board –
U3 PCC318
U4 U4082B U14 KA8602D
2
1
RLO1
TLO1
TLI1
RLI1
CPR GND
RXO
RXI RLI2 RLO2
TLO2 TLI2 CPT VB
FI
4
VCC
3
CD
FO
+
–
+
–
59
8
7
6
HTI
TXO
TXI
HTO+
HTO–
10 12
11 14
13
27
28 2526 24 20 21
22
23 19 17 18 15
16
MUT
MCO
MCI
CT
VLC
VR
VCC
HYBRID
AMP 2
HYBRID
AMP 1
MIC
AMP
VREF
+
–
VR
FILTER
AMP
COMPARATOR
AGC
BACKGROUND
NOISE
DETECTOR
VR
LEVEL
DETECTOR
LEVEL
DETECTOR
COMPARATOR
ATTENUATOR
CONTROL BLOCK
BACKGROUND
NOISE
DETECTOR
DIAL
TONE
DETECTOR
LEVEL
DETECTOR
LEVEL
DETECTOR
RX
ATTEN-
UATOR
TX
ATTENUATOR
+–
2
3
4
BIAS
CIRCUIT
+–
1
8
7
6
5
AMP1 AMP2
IN+
IN–
OUT1
VCC GND
OUT2
MUTE
RIPPLE
REJECTION

SPP-N1025/N1026
1616
U3
C11
R32C16 C15
Q1
R12
R88
R48
C30
R39
R41
L6
L1
L5
R108
C20
C32
C31
R58
Q6
Q5
R46Q4
Q8
R40
R62R38
X2
R73
R72
C29
R60
R63
R24
C28R42
L7
D8
L8
L3
C26 C24
C12
C19
C18
U2(4/4)
R20
U2(2/4)
R16
R19
R15 U2(1/4)
C17
C13
X1
D5
U2(3/4)
C55 R87
R26
R49
R34
R35
C23 C22 C21
U6
R25
R127
R67
SW1
T2
U8
R77
J7
J3
F2
R45
R99
R61
R64
R51
R75
R65
R47
R74
R43
R52
Q2
R44
R2
D7
D16
D15
D14
Z2 R3
R14
R7
EC7
R17
R4
R5R6
EC2
R11
C6
EC3
R30
EC4
R31
C58C57
R133R129
R98 R134
R23
R130R131
R132 R135
R28R29 R21
EC6
EC5
Z5
U5
Z4Z3
R22
C40
R110
PCC318
56p
220k56p 56p
MMBT3904
3.3k
10k
10k
0.1
10k
100k
18k
56p
47p
47p
1M
MMBT3904
MMBT3904
100kMMBT3904
MMBT3904
2.2k
2708.2k
8MHz
47k
47k
0.1
22k
47k
47k
0.130k
0.1 0.1
56p
6800p
56p
LM324
10k
LM324
5.1k
15k
5.1k LM324
0.1
0.22
3.58MHz
BAV99L
LM324
47p 10k
10k
10k
3k
3k
0.1 0.1 0.1
93C46D
47k
0
0
TLP627
0
250mA
250V
47k
0
10k
1%
120
330 1%
330 1%
330 1%
360 1%
330 1%
62k
330
1%
MMBT3904
15k
0
U05G
U05G
U05G
U05G
DTZ5.6 390
470k
360k
2.2
50V
100k
1%
3.6k
2.2k68
1
50V
750
0.1
4.7
50V
100k
4.7
50V
47k
4700p
2kV
4700p
2kV
220k220k
220k 220k
68k
5.1M5.1M
5.1M 5.1M
51k51k 220k
10
50V
1000
16V
DTZ27
NJM78M05FA
DTZ5.6DTZ5.6
100k
3300p
27k
2
3
5
6
7
8
9
10
11
12
13
14
15
1
COL2
ROW2
ROW0
ROW5
COL1
ROW4
ROW3
ROW1
COL3
DCA
DCB RD
COL0
CIDSDA
CIDSCL
MDAT
CIDINT
DCA
A1
A1
A2
A2
A3
A3
CIDSDA
CIDSCL
MDAT
CIDINT
RI_HI
RI_LO
DCBRD
RI_LO
RI_HI
P-CLK
INTCOM
MSG
LINE
SPK
WAIT
CHRG
PLL EN
DO
DO
DI
DI
CLK
CLK
CS
CS
T-DAT
C-DET
P-DAT
R-DAT
X2
X3
X5
X6
X7
X1
X8
DCB_RD
DC_COMPA
XIN
XOUT
VSS_A
VSS_D
VDD_D
VREF
IN_SE
IN_P
IN_N
OUT
+
-
POWER SUPPLY
(12V) LINE
(2/4)
CS
CLK
DI
DO
IN OUT
GND
(3/4)
(4/4)
(1/4)
100Ω
EEPROM
Q5,6
RESET SIGNAL
GENERATOR
CHARGE
DETECT
Q2,8
HIGH
LOW
OFF
RINGER
HOOK
ON/OFF
LINE
TRANSFORMER
+5V REGULATOR
BUFFER AF AMP(FOR TX)
AF AMP(FOR RX)
AF AMP(FOR DTMF)
FREQUENCY SHIFT
KEYING DEMODULATOR
+
-
CHARGE
TERMINAL
DC IN 9V
CONTROL
CHARGE
AF AMP(FOR SPEAKER)
10µH
10µH
10µH
10µH
10µH
10µH
U7
TMP87CH41U
SYSTEM CONTROLLER
M_DAT
SCK
SD_IN
SD_OUT
RESET
VDD_P
VDD_A
OUT_DC
IN_DCN
IN_DCP
DTMF
_OUT
INT
VCC
NC1
NC
VSS
5-4. SCHEMATIC DIAGRAM –BASE MAIN Board (1/2) –•See page 15 forWaveforms. •See page 15 for IC Block Diagram.
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonly withpartnumber specified.
Lescomposantsidentifiés parunemarque 0sont
critiques pourla sécurité. Neles remplacerque
par une pièce portant le numéro spécifié.
(Page 17)

SPP-N1025/N1026
1717
5-5. SCHEMATIC DIAGRAM –BASE MAIN Board (2/2) –•See page 15 for IC Block Diagrams.
C48
C47
R119
C27
C53
R79
R86
R93
R90R9C10
D11
D10
D9 R69
R70
R71
R120
R114
R115
R68 R113
C43
R111
R121
C34
R95
R117
R118
D13 R33
R81 C37
C38
R82
R10
C54
R91
R104
R92
R103
U13(1/4)
U13(2/4)
U13(3/4)
U13(4/4)
R122
R107
R123
R76
R125
R124
C25 C2
R18
C8
C9
R85
R78
C46C45
C44
A1
J2
J4
R36
R101
R27
R1 R94
R89
C42
C50R112
MIC101
R8
R96
EC1 EC20
R66
R109
C41
EC17 EC8 EC9
C51
EC12
EC10
EC11
C52
EC15
EC14EC18
R83
EC19
EC16
EC13
R80 C39
EC22
R116
C49
0.1
1000p
56k
0.1
0.1
15k
33k
68k
150k47k4.7
1N4148
1N4148
1N4148 15k
33k
68k
9.1k
24k
220k
24k 120k
220p
10k
6.2k
1000p
8.2k
220k 100k
1N4148 22k
47k 1000p
1000p
180k
180k
0.1
120k
9.1k
39k
47k
MC54/74HC4066
MC54/74HC4066
MC54/74HC4066
MC54/74HC4066
15k
15k
15k
15k
15k
15k
0.1 0.1
430k
0.22
0.01
33k
5.1k
0.10.01
0.1
0
0
0
00
0
0.1
0.110k
91k
1
100
16V
100
16V 0
27k
47p
1 50V 4.7 50V 100 16V
3300p
47
16V
2.2 50V
2.2 50V
3300p
2.2
50V
10
50V
47
50V100k
1
50V
2.2 50V
10
50V
360k 330p
10
50V
4.7k
47p
2
3
5
6
7
8
9
10
11
12
13
14
15
1
PLL EN
COL2
ROW0
ROW2
ROW5
COL1
ROW4
ROW3
ROW1
COL3
COL0
P-CLK
INTCOM
MSG
LINE
SPK
CHRG
T-DAT
C-DET
P-DAT
R-DAT
X1
X2
X3
X5
X6
X7
X8
WAIT
PD
FI
CD
VS
HTO+
HTO-
HTI
TO
TI
MICO
MIC
MUTE
VCI
CT
INPUT+
INPUT-
OUTPUT1
VCC
GND
VCC
MIC
RF UNIT
1
1
(1/4), (2/4)
SWITCH
(3/4)
SPEAKER ON/OFF
U4
U4082B
VOICE SPEAKERPHONE
GND
CPR
RLI1
RLO1
TLO1
TLI1
RECO
RI
RLI2
RLO2
TLO2
TLI2
CPT
VB
U14
KA8602B
SPEAKER AMP
MUTE
OUTPUT2
GND
RIPPLE
REJ
12
VREG
TX DATA
RX AUDIO
GND
CAR DET
MCU CLK
PLL EN
PLL CLK
PLL DATA
RX DATA
GND
TX AUDIO
22
INTCOM LED
COL2
ROW0
ROW2
ROW5
LINE LED
SPK LED
COL1
ROW4
ROW3
ROW1
HOLD LED
CHRG LED
COL0
COL3
WAIT LED
N MSG LED
GND
SPK(+)
SPK(-)
VREG
VREG
SWITCH
TEL LINE
(Page 16)
(Page 19)

SPP-N1025/N1026
1818
Q2
L6
L5
D9
D13
D10
D11
EC17
MIC101
MIC
+
EC12
EC22
EC19
EC18
EC14
EC15
EC11
EC10
EC1
EC16
EC13
+
+
+
+
+
+
+
+
EC9
+
EC8
+
+
+
+
+
+
+
J4
1
22
R75
R51
R74
R47
R64
R65
R109
R86
R84
R54
R63
R61
R104R92
R17
R96
R130
R131
R132
R135
R129
R133
R134
R98
EC4
EC7
U8
EC3
+
+
+
+
EC20
EC5
EC2
EC6
R91
R79
X2
X1
Z3 Z4 R52
D16
D14
D7
D15
T2
LINE
TRANSFORMER
C57C58
D8
J7
Z5
Z2
L3
L1
J3
J2
A1
L7
L8
F2
5
3
1
2
4
6
DC IN 9V
–+
112
RF
UNIT
LINE
CHARGE
TERMINAL
HIGH
RINGER
SW1
LOW OFF
C11
R21
R22 C12
R23
C15
R28
R29
C16
R2
R35
R32
R42
R88
R72
R73
R26
R49
R48
C55
R87
R34
C22
C21
R30
C18
R7
R19
R20
R15
C41
R9 C10
R14
R16
C8
C6
R12
R11
R1
C24
C19
R31
R8
R94
R108
R103
C40
R110
R4
R5 R6
C20
C2
R66
R3
C26
R93 R90
C25
C38
C53
C52
C9
R18
C17
R33
R41
R39 R40 R38R60
R62
R80
C37
R81 R25
C29 C30
C23 C13
R24
R58
C28
C31
C32
C48
R95 C51
C43
R119
C27 R76
R122
R123
R107
R124
R125
R113
C50
R112
C42
R111
C44
R116
C45
R114
R118
R78
C46
C47
C54
R85
R10
R82
C39
R83
C49
R46
R69 R70 R71
C34
R121
R120
R45 R43
R44
R117 R115
R68
R77
R36
R99
R101
R67
R127
R27
ECB
Q1
D5 K
A
K/A
1
1
7
71
1
3
8
8
14
14
U2
U13
U5
1213
24
U3 1
45
8
U6
15
28 1
14
U4
1
64
48
49
33
32
16 17
U7
U14
1
45
8
Q8
ECB
Q4
ECB
Q6 Q5
ECB
ECB
A
B
C
D
E
F
G
H
I
1 2 3 4 5 6 7 8 9 10 11 12
00
35-4752-04-
BASE MAIN BOARD
A
BASE KEY
BOARD
J2
5-6. PRINTED WIRING BOARD –BASE MAIN Board –
Q1 D-3
Q2 B-7
Q4 B-8
Q5 F-9
Q6 E-9
Q8 B-7
U2 D-5
U3 B-6
U4 G-8
U5 F-3
D5 B-5
D7 C-3
D8 B-2
D9 D-10
D10 D-10
D11 E-10
D13 D-6
D14 C-3
D15 C-3
D16 C-3
Ref. No. Location Ref. No. Location
•Semiconductor Location
U6 B-9
U7 D-9
U8 C-4
U13 E-5
U14 H-7
Z2 E-3
Z3 B-7
Z4 B-7
Z5 D-2
Ref. No. Location
(Page 19)

SPP-N1025/N1026
1919
J6
A
B
C
D
E
G
H
5-8. SCHEMATIC DIAGRAM –BASE KEY Board –5-7. PRINTED WIRING BOARD –BASE KEY Board –
•Semiconductor
Location
Ref. No. Location
LED1 H-2
LED2 B-2
LED4 B-3
LED6 G-3
LED7 H-3
LED8 G-5
(Page 18)
(Page 17)

SPP-N1025/N1026
2020
A
B
C
D
E
F
1
2
3
4
5
6
7
8
+
–
CHARGE
TERMINAL
DISPLAY
MODULE
3
.
6V
600mAh
9
1
0
G
H
5-9. PRINTED WIRING BOARD –HAND MAIN Board –
D1 C-9
D2 C-8
D3 B-8
D4 A-3
D5 C-1
D6 B-1
D7 C-8
D10 B-6
D11 B-6
D12 B-6
D14 F-5
D15 G-7
D16 G-5
D17 F-7
D21 C-5
Q1 C-8
Q2 A-3
Q3 B-4
Q4 C-9
Q5 B-4
U2 B-3
U3 C-5
U4 A-4
Ref. No. Location
•Semiconductor
Location