Sony SPP-888 User manual

1
SERVICE MANUAL
SPECIFICATIONS
General
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
See page 3.
Cordless handset
Power source
Rechargeable battery pack BP-T16
Battery life
Standby: Approx. 8 days
Talk: Approx. 6 hours
Battery charging time
Approx. 12 hours
Dimensions
Approx. 54 ×195 ×49 mm (w/h/d),
antenna excluded
(approx. 2 1/4 ×7 3/4 ×1 15/16 inches)
Antenna: Approx. 285 mm
(approx. 11 1/4 inches)
MassApprox. 255 g (approx. 8 oz), battery
included
SPP-888
E Model
CORDLESS TELEPHONE
Base phone
Power source
DC 9V from AC power adaptor
Dimensions
Approx. 185 ×95 ×215 mm (w/h/d),
antenna excluded
(approx. 7 3/8 ×3 3/4 ×8 1/2 inches)
Antenna: Approx. 700 mm
(approx. 27 5/8 inches)
MassApprox. 755 g (approx. 27 oz)
Cordless handset charge cradle
Power source
DC 9V from AC power adaptor
Dimensions
Approx. 68 ×90 ×220 mm (w/h/d)
(approx. 2 3/4 ×3 5/8 ×8 3/4 inches)
MassApprox. 180 g (approx. 6 oz), wall bracket
included
Design and specifications are subject to
change without notice.
MICROFILM
Base phone Cordless
handset

2
TABLE OF CONTENTS
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE
WITH MARK !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 PUBLISHED BY SONY.
1. GENERAL
Read this first........................................................................... 3
Checking the package contents ............................................... 3
Setting up the base phone ........................................................ 3
Preparing the battery pack ....................................................... 4
Making calls ............................................................................ 4
Receiving calls......................................................................... 6
One-touch dialing .................................................................... 6
Speed dialing ........................................................................... 7
Phone Directory....................................................................... 7
Switching the phones during a call.......................................... 9
Talking between the phones (Intercom) .................................. 9
Voice paging ............................................................................ 9
Transferring a call.................................................................. 10
First digit “0” call restriction ................................................. 10
Changing the digital security code ........................................ 11
Mounting the cordless handset charge cradle........................ 11
2. DISASSEMBLY
2-1. Cabinet (Lower) ................................................................ 13
2-2. Base LCD Board ............................................................... 13
2-3. Base Key Board................................................................. 14
2-4. Base Mic Board................................................................. 14
2-5. Base Main Board............................................................... 15
2-6. Cabinet (Rear) ................................................................... 15
2-7. Hand Main Board .............................................................. 16
3. TEST MODE
Base Phone Section ............................................................... 17
Handset Section ..................................................................... 19
4. ELECTRICAL ADJUSTMENTS
Base Phone Section ............................................................... 22
Handset Section ..................................................................... 24
5. DIAGRAMS
5-1. IC Pin Description............................................................. 26
5-2. Block Diagram –Base Phone Section– ............................. 27
5-3. Block Diagram –Handset Section– ................................... 28
5-4. Printed Wiring Board –Base Key Section– ....................... 29
5-5. Schematic Diagram –Base Key Section– .......................... 29
5-6. Printed Wiring Boards –Base Main Section–.................... 30
5-7. Schematic Diagram –Base Main (1/3) Section– ............... 31
5-8. Schematic Diagram –Base Main (2/3) Section– ............... 32
5-9. Schematic Diagram –Base Main (3/3) Section– ............... 33
5-10. Printed Wiring Board –Base LCD Section–...................... 34
5-11. Schematic Diagram –Base LCD Section– ........................ 35
5-12. Printed Wiring Board –Hand Main Section– .................... 36
5-13. Schematic Diagram –Hand Main Section– .......................37
5-14. Printed Wiring Board –Hand Key Section– ...................... 38
5-15. Schematic Diagram –Hand Key Section– .........................39
6. EXPLODED VIEWS
6-1. Base Phone Section ...........................................................44
6-2. Handset Section................................................................. 45
7. ELECTRICAL PARTS LIST ........................................ 46
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.

3
SECTION 1
GENERAL This section is extracted
from instruction manual.

4

5

6

7

8

9

10

11

12

13
1 P3x1
0
4 cabinet (lower)
3
2
P3x10
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (LOWER)
2-2. BASE LCD BOARD
1 CN301
2 BTP2.6x8
3 BTP2.6x8
4 BASE LCD board

14
2-3. BASE KEY BOARD
2-4. BASE MIC BOARD
4 BASE KEY board
2 BTP2.6x8
3 BTP2.6x8
1 CN302
2 BTP2.6x8
3 BASE MIC board
1 Unsolder the 2 places.

15
1 battery case lid (hand)
2 BTP 2.6x10
3 claws
4 claws
5 claw
6 cabinet (rear)
2-5. BASE MAIN BOARD
2-6. CABINET (REAR)
1 Unsolder the 2 places.
2 BTP2.6x8
3 BTP2.6x8
4 BTP2.6x8
5 BASE MAIN board

16
1 CN3
0 BVTP 2x8
2 BTP 2x8
4 Unsolder the
3 places.
5 Unsolder.
8 Unsolder.
6 Unsolder.
7 Unsolder.
3 BTP 2x8
!¡ charge terminals (hand)
!¢ speaker
!£ claws
!™ HAND KEY board
9 HAND MAIN board
discharge gap (CP101)

2-7. HAND MAIN BOARD

17
SECTION 3
TEST MODE
BASE PHONE SECTION
MANUAL TEST MODE
Set the Test Mode:
1. Set the DIAL MODE switch to “P” (pulse).
2. While pressing the INTERCOM key, insert the AC adaptor
(Reset start).
3. With the INTERCOM key, still held down, switch the
DIAL MODE switch “T” (tone) n“P” (pulse).
4. When the INTERCOM key is released, test mode starts.
Release the Test Mode:
1. Pull out the AC adaptor or turn off the power.
MACHINE TEST MODE
Set the Test Mode:
1. Connect between TP306 (TEST SW) and GND.
2. Set the Channel Setting terminal (See page 18.)
3. Turn on the power to start the test mode.
Release the Test Mode:
1. Pull out the AC adaptor or turn off the power.
2. Remove the short plug and turn on the power again.
OPERATION AT START OF TEST MODE
• The ringer sounds for 500 msec.
• Setting of channel: CH1 for manual test mode and the Channel
Setting terminal for machine test mode. (See page 18.)
• TX is set ON and the handset is allowed to call outside.
RSSI is set to Hi sensitivity.
• Liquid crystal display panel is turned ON for 1 sec. and then the
channel is displayed (for example, Ch1 CH1=01). LINE LED
and back light are to be still ON. The pulse dial “0” is output
once.
OPERATION IN TEST MODE
• Intest mode,RSSIis continuouslymonitored. LINELED isturned
ON with RSSI (Low) and OFF without RSSI (High).
• In test mode, any key input is continuously monitored. Each key
input causes the set to switch to the state as listed below.
TP337
TP335 TP334
TP336
TP306
TP320
– base main board (conductor side) –

18
Channel Setting:
During startup in machine test mode, make the following channel
settings by loading the terminal input data.
54 44 43 42 41 TX frequency RX frequency
TEST CLK COL3 COL2 COL1 COL0 (MHz) (MHz)
(TP320) (TP337) (TP336) (TP335) (TP334)
CH1 L L L L H 43.720 48.760
CH2 L L L H L 43.740 48.840
CH3 L L L H H 43.820 48.860
CH4 L L H L L 43.840 48.920
CH5 L L H L H 43.920 49.020
CH6 L L H H L 43.960 49.080
CH7 L L H H H 44.120 49.100
CH8 L H L L L 44.160 49.160
CH9 L H L L H 44.180 49.200
CH10 L H L H L 44.200 49.240
CH11 L H L H H 44.320 49.280
CH12 L H H L L 44.360 49.360
CH13 L H H L H 44.400 49.400
CH14 L H H H L 44.460 49.460
CH15 L H H H H 44.480 49.500
CH16 H L L L L 46.610 49.670
CH17 H L L L H 46.630 49.845
CH18 H L L H L 46.670 49.860
CH19 H L L H H 46.710 49.770
CH20 H L H L L 46.730 49.875
CH21 H L H L H 46.770 49.830
CH22 H L H H L 46.830 49.890
CH23 H L H H H 46.870 49.930
CH24 H H L L L 46.930 49.990
CH25 H H L L H 46.970 49.970
TEST1 H H L H L 43.780 48.800
TEST2 H H L H H 43.890 48.970
TEST3 H H H L L 46.800 49.910
TEST4 H H H L H 46.900 49.950
Operations by Key Inputs:
Key Description
VOLUME + Increments the wireless channel by one.
VOLUME – Decrements the wireless channel by one.
FLASH Exits TEST mode.
1 Turns PLL’s TX ON or OFF.
2 Displays the communication ID on LCD.
3 EEPROM Read/Write test. Writes data into EEPROM and reads it displaying the following if it is
normal and “EP-Error” if abnormal: “123456789012” (pictogram for transmit regulation also
displayed)
4 Key input test. The keys are to be input in the following order. Each key input produces a key touch
tone. An incorrect key input in the order causes an error tone returning to the test mode idle state.
Once all the keys are normally input, a completion sound is produced returning to the test mode idle
state.
[PROGRAM]n[ONE TOUCH DIAL A]n[ONE TOUCH DIAL B]n[SPEED DIAL]n[1]n[2]
n[3]n[4]n[5]n[6]n[7]n[8]n[9]n[TONE ]n[0]n[#]n[VOLUME +]n[VOLUME –]
n[REDIAL/PAUSE]n[FLASH]n[INTERCOM]n[HOLD]n[SPEAKERPHONE]
5 Forces the RSSI sensitivity into LOW level.
6 Telegram receive test. Waits to receive ID=AAAA and DATA=AAA. Sends back the same data as
the received telegram.
7 Telegram transmission test. Continuously sends ID=AAAA and DATA=AAA. Press [7] key again
stops to transmit data returning to test mode idle state.
8 Forcedly turns HI-CUT-MUTE ON or OFF.
9 Manually stores the communication ID.After “ID=” is displayed, enter a four-digit communication
ID in hexadecimal format. The key assignments areA=VOLUME +, B=VOLUME –,
C=REDIAL/PAUSE, D=FLASH, E=INTERCOM and F=HOLD keys. Use [SPEAKERPHONE]
key to complete the input.
0 Displays the destination and channel.
PROGRAM + HOLD Clears all EEPROM except for the communication ID. “EP-CLEAr” is displayed.
PROGRAM + REDIAL/PAUSE Sets PIN (ID for transmit regulation) to 0000. “PId-CLEAr” is displayed.
SPEAKERPHONE Speakerphone intercom talk state.
INTERCOM Local handset intercom talk state.
Pin No.
Channel

19
HANDSET SECTION
MANUAL TEST MODE
Set the Test Mode:
1. Enter the test mode by pressing key while pressing 1 and
TALK keys when in idle condition.
(Key operation n1 nTALK )
Release the Test Mode:
1. Press the OFF key.
2. Turn off the power. (Remove the battery and replace them.)
MACHINE TEST MODE
Set the Test Mode:
1. Connect between TP316 (TEST I/O) and GND.
2. Set the Channel Setting terminal. (See page 20.)
3. Turn on the power to start the test mode.
Release the Test Mode:
1. Turn off the power.
2. Remove the short plug and turn on the power.
OPERATION AT START OF TEST MODE
• The ringer sounds for 500 msec.
• Setting of channel: CH1 for manual test mode and the Channel
Setting terminal for machine test mode. (See page 20.)
• TX is set ON and the handset is allowed to call outside.
RSSI is set to Hi sensitivity.
• Liquid crystal display panel is turned ON for 1 sec. and then the
channel is displayed (for example, Ch1 CH1=01). Back light is
to be still ON.
TP201
TP202
TP205
TP316
TP314
TP203 TP204
– hand main board (side B) –

20
Channel Setting:
During startup in machine test mode, make the following channel
settings by loading the terminal input data.
45 52 51 50 49 TX frequency RX frequency
ROW5 COL4 COL3 COL2 COL1 (MHz) (MHz)
(TP205) (TP204) (TP203) (TP202) (TP201)
CH1 L L L L H 48.760 43.720
CH2 L L L H L 48.840 43.740
CH3 L L L H H 48.860 43.820
CH4 L L H L L 48.920 43.840
CH5 L L H L H 49.020 43.920
CH6 L L H H L 49.080 43.960
CH7 L L H H H 49.100 44.120
CH8 L H L L L 49.160 44.160
CH9 L H L L H 49.200 44.180
CH10 L H L H L 49.240 44.200
CH11 L H L H H 49.280 44.320
CH12 L H H L L 49.360 44.360
CH13 L H H L H 49.400 44.400
CH14 L H H H L 49.460 44.460
CH15 L HHHH 49.500 44.480
CH16 H L L L L 49.670 46.610
CH17 H L L L H 49.845 46.630
CH18 H L L H L 49.860 46.670
CH19 H L L H H 49.770 46.710
CH20 H L H L L 49.875 46.730
CH21 H L H L H 49.830 46.770
CH22 H L H H L 49.890 46.830
CH23 H L H H H 49.930 46.870
CH24 H H L L L 49.990 46.930
CH25 H H L L H 49.970 46.970
TEST1 H H L H L 48.800 43.780
TEST2 H H L H H 48.970 43.890
TEST3 H H H L L 49.910 46.800
TEST4 H H H L H 49.950 46.900
Machine Test Mode Input / Output:
1. Input (Input ports for other than main tasks)
Pin Name Pin No. Function Logic
ROW5 (TP205) 45
COL4 (TP204) 52
COL3 (TP203) 51 Setting the CH (channel) Refer to channel setting
COL2 (TP202) 50
COL1 (TP201) 49
TEST I/O (TP316) 36 Startup of the test mode. H : Start, L : No start
2. Output (Output ports for other than main tasks)
Pin Name Pin No. Function H Logic L Logic
TALK LED (TP314) 40 Various input/output monitor output No detection Detection
(default : RSSI (H) detection).
LCD/KEY LED 39 During test mode : All light lit However, does not No light Light
(D302 to 308) include measurment of consumption current.
Pin No.
Channel
<Display example of LCD>
E92/MX2
VOLUME
NORM
ch =1