Sony SPP-874 User manual

– 1 –
SERVICE MANUAL
SPECIFICATIONS
General
Operating channel
25 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adaptor (AC-T56) (1) (E92)
AC power adaptor (AC-T124) (1) (E12)
AC power adaptor (AC-T125) (1) (ARGENTINE)
Telephone line cord (1)
Rechargeable battery pack (BP-T16) (1) (SPP-874)
Rechargeable battery pack (BP-T16) (2) (SPP-884)
Wall bracket/stand (1)
Screws (2)
Handset
Power source
Rechargeable battery pack BP-T16
Battery life
Standby: Approx. 14 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. 240 g (approx. 8 oz), battery
included
SPP-874/884
E Model
CORDLESS TELEPHONE
Base unit
Power source
DC 9V from AC power adaptor
Rechargeable battery pack BP-T16
(SPP-884 only)
Battery charging time
Approx. 20 hours (SPP-884 only)
Dimensions
Approx. 120 ×64 ×223 mm (w/h/d),
antenna excluded
(approx. 4 3/4 ×2 5/8 ×8 7/8 inches)
Antenna: Approx. 680 mm
(approx. 26 7/8 inches)
MassApprox. 350 g (approx. 12 oz), wall
bracket and battery excluded
Design and specifications are subject to change without
notice.
• Abbreviation
E12 : 220–240V area of E model
E92 : 120V area of E model
MICROFILM
Photo: SPP-884
Handset
Base unit

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SPP-874/884
5-4. SCHEMATIC DIAGRAM — BASE SECTION — • Refer to page 37 for IC Block Diagrams.
Note:
• 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 other-
wise specified.
•¢: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc
power supply from external power voltage jack.
• Voltage is dc with respect to ground under
no-signal condition.
• Voltage dc with respect to ground under no-signal
conditions.
• Voltages are taken with a VOM (Input impedance
10 MΩ).
Voltage variations may be noted due to normal pro-
duction tolerances.
• Signal path.
N: RX
O: TX
P: bell
• Abbreviation
E12 : 220-240V area of E model
E92 : 120V area of E model

5-6. SCHEMATIC DIAGRAM — HAND MAIN SECTION — • Refer to page 37 for IC Block Diagrams.
– 31 – – 32 –
SPP-874/884
Note:
• 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.
•¢: internal component.
•U: B+ Line.
•H: adjustment for repair.
• Powervoltageisdc3.6 V andfed with regulateddc power
supply from battery connector (CN2).
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are takenwith aVOM(Input impedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
N: RX
O: TX
• Abbreviation
E12 : 220-240V area of E model
E92 : 120V area of E model
(Page 36)

5-8. SCHEMATIC DIAGRAM — HAND KEY SECTION — • Refer to page 37 for IC Block Diagrams.
– 35 – – 36 –
SPP-874/884
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
•C: panel designation.
•U: B+ Line.
• Powervoltage is dc3.6 V andfed with regulateddc power
supply from battery connector (CN2).
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are takenwith aVOM(Input impedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Abbreviation
E12 : 220-240V area of E model
E92 : 120V area of E model
(Page 32)

• IC Block Diagrams
– 37 – – 38 –
5-9. IC PIN DESCRIPTIONS
• IC801 LC6621108A (SYSTEM CONTROL) (BASE UNIT)
Pin No. Pin Name I/O Pin Description
1 RSSI CTRL O RSSI sens select output (L: Low sens)
2 EEPROM DATA I/O EEPROM data input/output (Not used in this set.)
3 EEROM CLK O EEPROM clock output (Not used in this set.)
4 RX-DATA I RF reception data input
5 CHARGE DET I Charge detection input
6 TX-DATA O Beep output at RF transmission data or outside the circle.
7 HOLD DET I Hold cancellation detection input
8 GND — Ground
9 OSC1 — Crystal oscillation input (4.048MHz)
10 OSC2 — Crystal oscillation output (4.048MHz)
11 VDD — Power supply pin
12 RESET — Reset input
13 TEST — Not used. (Fixed at L in this set.)
14 AC DET I AC adaptor without detection input
15 RING DET I Ring detection input
16 PLL-STB O PLL control standby output
17 PLL-CLK O PLL control clock output
18 PLL-DATA O PLL control data output
19 SIG-DATA-IN I RSSI/LOCK signal input (L:RSSI, H:LOCK)
20 TX+B CTRL O TX power control output
21 DTMF O DTMF output
22 DP O Pulse output
23 COL1 I MODEL1/PAGE input
24 COL2 I MODEL2/ T/P input
25 COL3 I MODEL3/MAKE input
26 COL4 I FLASH time/ D/P input
27 ROW1 O Matrix 1 output
28 ROW2 O Matrix 2 output
29 TEST I/O I/O At TEST start-up or ID writing, data input/output. (L: TEST start-up)
30 TEST CLK/POWER LED I/O At initial ID writing, clock input/output and flashing on power failure.
IC501 TB31224F (BASE MAIN BOARD)
IC1 TB31224F (HAND MAIN BOARD)
IC901 MC34063AM
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45
46
47
48
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38 37 36 35 34 32
33 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
1st
MIXER
2nd
MIXER
BATTERY
ALARM
DATA
LATCH
CONTROL
LIMITER
EXPANDER
COMPRESSOR
IF AMP QUOD
LACHA
DETECT
LPF
NOISE
FILTER
DATA
COMPARATOR
RSSI
RECEIVE
AMP
E-MUTE
C-MUTE
MIC
AMP
PRE AMP
SPLATTER
2nd
LOCAL
TX
PLL
RX
PLL
RX
VCO
VREF
VCC2
C-RECT
VCC3
E-RECT N-REC VCC1
GND1
C-NF
8
+
–
1.25V
REFERENCE
REGULATOR
R
CT
QS
7
6
5
4
3
COMPARATOR
IPK
OSCILLATOR
2
1
DRIVER
COLLECTOR
COMPARATOR
INVERTING
INPUT
IPK SENSE
VCC
GND
TIMING
CAPACITOR
SWITCHING
EMITTER
SWITCHING
COLLECTOR

– 39 –
• IC401 LC662716A (SYSTEM CONTROL) (HANDSET)
Pin No. Pin Name I/O Pin Description
1 BEEP ATT O Beep volume High/Low control output (L: High)
2 TX-DATA O RF transmission data output
3 BEEP O Beep output
4 VSS — Ground
5 OSC1 — Crystal oscillation input (4.048MHz)
6 OSC2 — Crystal oscillation output (4.048MHz)
7 VDD — Power supply pin
8 RESET — Reset input
9 BAT-IN I Battery detection input
10 PE1 — Not used. (Fixed at L in this set.)
11 TEST — Not used. (Fixed at L in this set.)
12 HOLD I Input for intermittent. (CR external)
13 – 16 ACT4 O Output for intermittent reception control. (L: at operation)
17 CHARGE DET I Charge detection input (H: in charge)
18 BAT-LOW-IN I Battery low-voltage detection input
19 — — Not used. (Fixed at L (SPP-874/884:E92), H (SPP-884:E12) in this set.)
20 RX-DATA I RF reception data input
21 PLL-STB O PLL control standby output
22 PLL-DATA O PLL control data output
23 PLL-CLK O PLL control clock output
24 SIG-DATA-IN I RSSI/LOCK signal input (L: RSSI, H: LOCK)
25 TX+B CTRL O TX power control output
26 HICUT MUTE O High band noise mute output
27 RSSI CTRL O RSSI sens select output (L: Low sens)
28 VOLUME O VOLUME HIGH/NORM select output
29 – 32 P80 – 83 O Not used. (Fixed at H in this set.)
33 MODE0 I Destination model select input 0 (Fixed at L (SPP-874:E92/884),
H (SPP-874:E12) in this set.)
34 MODE1 I Destination model select input 1 (Fixed at L in this set.)
35 TEST CLK I/O At initial ID writing, clock input/output.
36 TEST I/O I/O At TEST start-up or ID writing, data input/output. (L: TEST start-up)
37, 38 PA0, 1 — Not used. (Fixed at L in this set.)
39 LIGHT O Key & LCD back light LED control output
40 TALK LED O TALK LED control output
41 – 45 ROW1 – 5 O Key matrix output
46 JOG-EN1 I JOG input
47 JOG-PUSH I JOG input
48 JOG-EN2 I JOG input
49 – 52 COL1 – 4 I Key matrix input
53 LCD+B CTRL O LCD power control output (L: at operation)
54 LCD-E O LCD-R/W trigger output
55 LCD-R/W O LCD-R/W control output
56 LCD-RS O LCD register select signal output
57 – 60 LCD-DB4 – 7 O LCD-DATA output
61 EEPROM WP O EEPROM write protect output
62 EEPROM DATA I/O EEPROM data input/output
63 EEPROM CLK O EEPROM clock output
64 MIC ON O MIC ON/OFF control output (L: OFF)