Sony SPP-69 User manual

– 1 –
SERVICE MANUAL
SPECIFICATIONS
General
Frequency control Crystal-controlled PLL
Operation mode FM, duplex
Operation channel 10 channels
Supplied accessories AC power adaptorAC-T56 (1)
Telephone line cord (1)
Rechargeable battery pack BP-T16 (1)
Screws (2)
Directories (2 sheets)
Handset
Power source Rechargeable battery pack BP-T16
Battery life Standby: Approx. 14 days
Talk: Approx. 6 hours
Dimensions Approx. 2 3/8 ×7 3/4 ×1 7/8 inches (w/h/d), antenna
excluded (approx. 58 ×194 ×47 mm)
Antenna: Approx. 4 3/8 inches (approx. 110 mm)
Mass Approx. 7.8 oz (approx. 220 g), battery included
Base unit
Power source DC 9V from AC power adaptor
Battery charging time Approx. 12 hours
Dimensions Approx. 5 1/4 ×2 1/4 ×8 3/4 inches (w/h/d), antenna
excluded (approx. 132 ×56 ×220 mm)
Antenna: Approx. 12 1/4 inches (approx. 310 mm)
Mass Approx. 11 oz (approx. 310 g)
Design and specifications are subject to change without notice.
SPP-69/79
Singapore Model
CORDLESS TELEPHONE
MICROFILM
Ver 1.0 1999. 12

– 2 –
TABLE OF CONTENTS
1. GENERAL
Setting up the phone ................................................................ 3
Making and receiving calls...................................................... 4
Speed dialing ........................................................................... 4
Resetting the digital security code........................................... 5
Paging ...................................................................................... 5
2. DISASSEMBLY
2-1. Cabinet (Lower) (Base Unit)............................................... 6
2-2. Cabinet (Rear) (Handset) .................................................... 6
3.TEST MODE
Base Unit Section .................................................................... 7
Handset Section ....................................................................... 9
4. ELECTRICAL ADJUSTMENTS
Base Unit Section .................................................................. 12
Handset Section ..................................................................... 14
5. DIAGRAMS
5-1. IC Pin Descriptions ........................................................... 16
5-2. Block Diagram –Base Unit Section– ................................ 19
5-3. Block Diagram –Handset Section– ................................... 21
5-4. Printed Wiring Board –Base Unit Section– ...................... 23
5-5. Schematic Diagram –Base Unit Section– ......................... 25
5-6. Printed Wiring Board –Handset Section– ......................... 27
5-7. Schematic Diagram –Handset Section– ............................ 29
6. EXPLODED VIEWS
6-1. Base Unit Section .............................................................. 32
6-2. Handset Section................................................................. 33
7. ELECTRICAL PARTS LIST ........................................ 34
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.
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 PUBLISHED BY SONY.

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

– 4 –

– 5 –

– 6 –
1 battery case lid assy
2 BTP 2.6x10
5 cabinet (rear
)
3 claws
4 claw
1 P 3x10
2 P 3x10
4 cabinet (lower
)
3 CN301
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (LOWER) (BASE UNIT)
2-2. CABINET (REAR) (HANDSET)

– 7 –
TP47
TP106
IC501
IC101 TP61
TP62
TP63
TP66
TP67
TP65
TP46
TP64
– base main board (conductor side) –
SECTION 3
TEST MODE
BASE UNIT SECTION
MANUAL TEST MODE
Set the Test Mode:
1. Set the DIAL MODE switch to “P” (pulse).
2. While pressing the HANDSET LOCATOR key, insert the AC
adaptor (Reset start).
3. With the HANDSET LOCATOR key, still held down, switch
the DIAL MODE switch “P” (pulse) t“T” (tone) t
“P” (pulse).
4. When the HANDSET LOCATOR key is released, test mode
starts.
5. Firstly, “0” will be dialled out at 10 pps. Then “1”, “4”, “8”
and “#” will be sent out by DTMF.
6. Set to TX ON. Goes to external line state in 1 CH.
Release the Test Mode:
1. Pull out the AC adaptor or turn off the power.
MACHINE TEST MODE
Set the Test Mode:
1. With one of the CH setting terminals in “H” input state, cause
Reset of Power ON. Equipment enters machine test mode.
2. Setting of CH according to logic input with CH setting
terminal.
3. ON/OFF of TX is according to the input logic of the DIAL
MODE terminal.
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.

– 8 –
2. Output (Output ports for other than main tasks)
Pin Name Pin No. Function H Logic L Logic
CHARGE DET (TP21) 18 State in section 1. Input Refer to section 1. Input
29 28 27
TEST1 TEST2 TEST3 Operation with CHARGE LED Operation with TX ON
(TP67) (TP66) (TP65)
L L L If RSSI (H) is detected : Light ON If RSSI (H) is detected : Light ON
L L H If RSSI (L) is detected : Light ON If RSSI (L) is detected : Light ON
L H L If TX LOCK is detected : Light OFF If TX LOCK is detected : Light OFF
L H H If RX LOCK is detected : Light OFF If RX LOCK is detected : Light OFF
H L L BEEP output
H L H ID CODE output
H H L If RING is detected : Light ON If RING is detected : Light ON
H H H If HANDSET LOCATOR key is input : Light ON If HANDSET LOCATOR key is input : Light ON
Channel Setting:
During startup in machine test mode, make the following channel
settings by loading the terminal input data.
23 24 25 26 TX frequency RX frequency
M1 M2 M3 M4 (MHz) (MHz)
(TP61) (TP62) (TP63) (TP64)
CH1 H H H L 46.610 49.670
CH2 L L L H 46.630 49.845
CH3 46.670 49.860
CH4 46.710 49.770
CH5 46.730 49.875
CH6 46.770 49.830
CH7 46.830 49.890
CH8 H L L H 46.870 49.930
CH9 L H L H 46.930 49.990
CH10 H H L H 46.970 49.970
TEST1 L L H H 43.780 48.800
TEST2 H L H H 43.890 48.970
TEST3 L H H H 46.800 49.910
TEST4 H H H H 46.900 49.950
Machine Test Mode Input / Output:
1. Input (Input ports for other than main tasks)
Pin Name Pin No. Function Logic
M1 (TP61) 23
M2 (TP62) 24 Setting the CH (channel) Refer to channel setting
M3 (TP63) 25
M4 (TP64) 26
DIAL MODE 17 Setting the TX ON/OFF TONE : open, PULSE : short
(TP47)
HANDSET LOCATOR Manual : Channel increment Incrementing of channels in order from 1 to 25.
(TP46) 16 Machine : Dial data “5” is output to Key input with “L” input.
DTMF/DP exchange The first time there is output of “5” with DTMF.
Pin No.
Channel

– 9 –
IC501
IC101
TP35TP36
TP55 TP33
TP44
TP43 TP14 TP13
TP16 TP15
TP17
– hand main board (side B) –
HANDSET SECTION
MANUAL TEST MODE
Set the Test Mode:
1. Enter the test mode by pressing 0 key while pressing 1 and
TALK keys when in idle condition.
(Key operation 0 t1 tTALK )
2. The RINGER will ring for 500 msec. when the test mode is
started.
3. Measurement mode of consumption current. (42# state)
4. Use key input to carry out the various settings.
5. Use port inputs to set output from LED terminals.
Release the Test Mode:
1. Press the 0 , 0 and # keys.
2. Turn off the power. (Remove the battery and replace them.)
MACHINE TEST MODE
Set the Test Mode:
1. When power on reset is applied while a “H” (high) is input the
TEST SW (TP43) terminal (IC501 r; pin), the RING (Level
H, 500 msec) sounds.
2. Following that, at timing in which the TEST SW terminal has
“H” (high) input, there is output of “L” (low) by the CH
(channel) setting control terminal. Then there is PLLsetting to
the CH which was read to with the CH setting terminal
according to that “L” (low) output.
3. Set the TX setting to TX OFF.
4. The channel is set by voice not by data.
5. Use port inputs to set output from LED terminals.
Release the Test Mode:
1. Press the OFF key.
2. Remove the short plug and turn on the power.

– 10 –
Channel Setting:
During startup in machine test mode, make the following channel
settings by loading the terminal input data.
34 33 32 31 29 TX frequency RX frequency
ROW5 ROW4 ROW3 ROW2 ROW1 (MHz) (MHz)
(TP13) (TP14) (TP15) (TP16) (TP17)
CH1 H L L L L 48.760 43.720
CH2 H L L L H 48.840 43.740
CH3 H L L H L 48.860 43.820
CH4 H L L H H 48.920 43.840
CH5 H L H L L 49.020 43.920
CH6 H L H L H 49.080 43.960
CH7 H L H H L 49.100 44.120
CH8 H L H H H 49.160 44.160
CH9 H H L L L 49.200 44.180
CH10 H H L L H 49.240 44.200
CH11 H H L H L 49.280 44.320
CH12 H H L H H 49.360 44.360
CH13 H H H L L 49.400 44.400
CH14 H H H L H 49.460 44.460
CH15 H H H H L 49.500 44.480
CH16 L L H H L 49.670 46.610
CH17 L L H H H 49.845 46.630
CH18 L H L L L 49.860 46.670
CH19 L H L L H 49.770 46.710
CH20 L H L H L 49.875 46.730
CH21 L H L H H 49.830 46.770
CH22 L H H L L 49.890 46.830
CH23 L H H L H 49.930 46.870
CH24 L H H H L 49.990 46.930
CH25 L H H H H 49.970 46.970
TEST1 L L L H L 48.800 43.780
TEST2 L L L H H 48.970 43.890
TEST3 L L H L L 49.910 46.800
TEST4 L L 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
ROW1 (TP17) 29
ROW2 (TP16) 31
ROW3 (TP15) 32 Setting the CH (channel) Refer to channel setting
ROW4 (TP14) 33
ROW5 (TP13) 34
TEST CH (TP33) 1 Control terminal for setting the CH (channel) H : OFF, L : ON
TEST SW (TP43) 40 Start up of the test mode H : Start, L : Not start
TESTACK (TP44) 44 During the test mode, causes start of intermittent H : Intermittent start
operation with external input.
2. Output (Output ports for other than main tasks)
Pin Name Pin No. Function H Logic L Logic
TALK LED (TP35) 48 Various input/output monitor output No detection Detection
(default : RSSI (H) detection).
KEY LED (TP55) 2 During test mode :All light lit. However, does No light Light
not include measurment of consumption current.
Pin No.
Channel

– 11 –
Key Processing (Setting the Manual Test Mode) :
1. (Upper position) (Lower position) Set with #.
2. 3X# can be substituted with X . 4
012 3
TX RX RX MIC Lk 7
RF AF
0 QUIT 10 ch 20 ch Batt Alarm H A L T XKEY TEST
1 1 ch 11 ch 21 ch CHARGE DET XaXXX
2 2 ch 12 ch 22 ch XaaXX
3 3 ch 13 ch 23 ch aa XXX
4 4 ch 14 ch 24 ch RX LOCK aaa XX
5 5 ch 15 ch 25 ch TX LOCK aaaa X
6 6 ch 16 ch T1 ch RSSI (H) aaaaa
7 7 ch 17 ch T2 ch RSSI (L) —————
8 8ch 18ch T3ch DATATX —————
9 9ch 19ch T4ch —————
Purpose CH setting only SIGOUT control General
operation
The standard is external communication Condition
Application state. surveillance with Measurement mode of
State for standard electrical adjustment TALK LED. consumption current.
process.
Upper position
Lower position
• By pressing the CH key there is increment of the channel.
However, this does not include the test channel.
• Control of the power source during 38# DATATX is (TX & RX
RF & RX AF=ON) in 44# state.
• Control of the power source during the 70# key check mode is
41# state (TX OFF).
• For CH setting, SIGOUT control and power source control (with
the exception of above-mentioned 38# state) the state can be set
independently.
Example : In 15 ch, the order for carrying out TX modulation
level and RSSI (H) sensitivity setting is as follows :
The following are possible :15# t44# t36#
36# t15# t44#
44# t36# t15#
*
a: ON, X: OFF

– 12 –
0 V
Adjust so that they
synchronize at 0 V.
RSSI output waveform AF oscillator
EXT signal
20 Hz
RSSI WAVEFORM
+
–
oscilloscope
(DC range)
TP9 (SIG OUT)
TP19 (GND)
FM RF
signal generator
TP2
TP3 (RX GND
)
AF oscillator
Output: 20 Hz
level meter
+
–
PBX tester
TP104
600
Ω
TP105
F.B.
DC 48V
or
FM RF
signal generator
TP2
TP3 (RX GND
)
+
–
digital voltmeter
TP5 (RX VT)
TP3 (RX GND)
+
–
digital voltmeter
TP6 (TX VT)
TP19 (GND)
SECTION 4
ELECTRICAL ADJUSTMENTS
BASE UNIT SECTION
Note:
• Apply 9V dc from regurated DC power supply.
• Perform the adjustment at TEST3CH (28CH : 49.910 MHz) as a
rule.
• Set to base unit manual test mode. (Refer to page 7)
• Switch position :
S302 (DIAL MODE) : P (pulse)
TX SECTION ADJUSTMENT
• The electrolytic capacitor (10 µF/10 V) connected TP23 (DET
OUT) to TP19 (GND). (Only TX section adjustment)
TX VT Adjustment
Setting :
Procedure :
1. The digital voltmeter connected TP6 (TXVT) to TP19 (GND).
2. Adjust the L52 for 2.2 ± 0.05 V reading on the digital voltmeter.
RX VT Adjustment
Setting : Procedure :
1. Adjust the FL101 for the maximam reading on the level meter.
Also check that the output level is the specified values.
Specified Value : –1.4 to –9.6 dBV
RSSI Hi Adjustment
Note:
• Perform the adjustment at TEST3CH (28CH : 49.910 MHz) as a
rule.
Setting :
Procedure :
1. The digital voltmeter connected TP5 (RX VT) to TP3
(RX GND).
2. Adjust the L101 for 2.4 ± 0.05 Vreading on the digital voltmeter.
Procedure :
1. Use the oscilloscope to confirm the FM RF signal generator
input(AF)signal waveformand RSSI signal,and use theRV101
so that they are synchronized (duty is synchronized).
Carrier frequency : 49.910 MHz
Modulation : 1 kHz
Deviation : FM 3 kHz
Output level : 60 dBµV (1 mV) (EMF)
RX SECTION ADJUSTMENT
RX LEVEL Adjustment
Note:
• Perform the adjustment at TEST3CH (28CH : 49.910 MHz) as a
rule.
Setting :
Carrier frequency : 49.910 MHz
Modulation : 20 Hz (EXT)
Deviation : AM 50%
Output level : 17 dBµV (7.1 µV) (EMF)
Adjustment Location : base main board (See page 13)

– 13 –
IC501
IC101
TP23
TP19
TP6
TP9
TP5
TP2
TP3
TP105
TP104
– base main board (conductor side) –
L101
FL101
L52
RV101
– base main board (component side) –
Adjustment Location :

– 14 –
0 V
Adjust so that they
synchronize at 0 V.
RSSI output waveform AF oscillator
EXT signal
20 Hz
RSSI WAVEFORM
+
–
oscilloscope
(DC range)
TP9 (SIG IN)
TP3 (RX GND)
FM RF
signal generator
TP2
TP3 (RX GND
)
AF oscillator
Output: 20 Hz
+
–
level meter
TP26 (SP)
TP27 (SP)
FM RF
signal generator
TP2
TP3 (RX GND
)
+
–
digital voltmeter
TP5 (RX VT)
TP3 (RX GND)
+
–
digital voltmeter
TP6 (TX VT)
TP30 (TX GND
)
HANDSET SECTION
Note:
• Apply 3.6 V dc from regurated DC power supply.
• Perform the adjustment at TEST1CH (26CH : 43.780 MHz) as a
rule.
• Set to handset manual test mode. (Refer to page 9)
TX SECTION ADJUSTMENT
TX VT Adjustment
Setting :
Procedure :
1. The digital voltmeter connected TP6 (TX VT) to TP30
(TX GND).
2. Adjust the L52 for 0.9 ± 0.05 V reading on the digital
voltmeter.
RX VT Adjustment
Setting : Procedure :
1. Adjust the FL101 for the maximam reading on the level meter.
Also check that the output level is the specified values.
Specified Value : –9.5 to –15.5 dBV
RSSI Hi Adjustment
Note:
• Perform the adjustment at TEST1CH (26CH : 43.780 MHz) as a
rule.
Setting :
Procedure :
1. The digital voltmeter connected TP5 (RX VT) to TP3
(RX GND).
2. Adjust the L102 for 3.0 ± 0.05 V reading on the digital
voltmeter.
Procedure :
1. Use the oscilloscope to confirm the FM RF signal generator
input (AF) signal waveform and RSSI signal, and use the
RV101 so that they are synchronized (duty is synchronized).
Carrier frequency : 43.780 MHz
Modulation : 1 kHz
Deviation : FM 3 kHz
Output level : 60 dBµV (1 mV) (EMF)
RX SECTION ADJUSTMENT
RX LEVEL Adjustment
Note:
• Perform the adjustment at TEST1CH (26CH : 43.780 MHz) as a
rule.
Setting :
VOL switch : M
Carrier frequency : 43.780 MHz
Modulation : 20 Hz (EXT)
Deviation : AM 50%
Output level :5.5dBµV(1.88µV) (EMF)
Adjustment Location : hand main board (See page 15)

– 15 –
IC501
TP27
TP30
TP26
TP3
TP5
TP9
TP6
IC101
TP2
– hand main board (side B) –
L102 FL101
L52
RV101
– hand main board (side A) –
Adjustment Location :

– 16 –
SECTION 5
DIAGRAMS
5-1. IC PIN DESCRIPTIONS
• IC501 SB662104A-4L63-TLM (SYSTEM CONTROL) (BASE UNIT)
Pin No. Pin Name I/O Pin Description
1 STB O Strobe signal output to PLL.
2 DATA O Serial data output to PLL.
3 CLK O Serial clock output to PLL.
4 RX-DATA I RX data input
5 SIG-IN I RSSI/PLL-LOCK signal input (L: RSSI, H: PLL-LOCK)
6 H-MUTE O Half mute control output (L: Mute ON)
7 TX-DATA O TX data, external system alarm output
8 VSS — Ground
9 OSC2 O Crystal oscillation output (4.048 MHz)
10 OSC1 I Crystal oscillation input (4.048 MHz)
11 VDD — Power supply pin (+3 V)
12 RESET I System reset input (L: Reset)
13 TEST I Test pin (Connect to ground in this set.)
14 POW-DET I Power failure detection input (L: Power failure)
15 MBR I Make 30/40 (%) select input (H: 30%, L: 40%)
16 PAGE I HANDSET LOCATOR input (H: input)
17 DIAL MODE I DIAL MODE select input
18 CHG-DET I Charge detection input (L: Charge)
19 RSSI H/L O RSSI sensitivity select output (L: Low sensitivity)
20 DP O Dial pulse ON/OFF control output
21 DTMF O DTMF generator output
22 TX +B CTRL I TX B+ ON/OFF control input (L: TX ON)
23 – 26 M1 – 4 I Channel setting for test mode 1 – 4.
27 – 29 TEST3 – 1 I Test mode setting 3 – 1
30 RING I Ring detection input (L: Ring input)

• IC501 SH66356C-4L62 (SYSTEM CONTROL) (HANDSET)
Pin No. Pin Name I/O Pin Description
1 TEST CH O Test mode channel control output (L: Active)
2 KEY LED O Key LED ON/OFF control output (L: ON) (Fixed at “H” in this set.)
3 SIG-IN I RSSI/PLL-LOCK signal input (L: RSSI, H: PLL-LOCK)
4 PLL-STB O Strobe signal output to PLL.
5 PLL-DATA O Serial data output to PLL.
6 NC — Not used. (Open)
7 PLL-CLK O Serial clock output to PLL.
8 RX-DATA I RX data input
9, 10 TX-DATA O TX data output
11 BEEP O Beep signal output
12 HOLD I Hold control input (L: Hold)
13 TX +B CTRL O TX B+ ON/OFF control output (L: TX ON)
14 RX +B CTRL O RX B+ ON/OFF control output (L: RX ON)
15 TEST I Test pin (Connect to ground in this set.)
16 VSS — Ground
17 OSC1 I Crystal oscillation input (4.048 MHz)
18, 19 NC — Not used. (Open)
20 OSC2 O Crystal oscillation output (4.048 MHz)
21 RESET I System reset input (L: Reset)
22, 23 ACT3, 4 O Intermittent reception activation control (L: Active)
24 – 27 COL0 – 3 I Key input 0 – 3
28 MIC O Microphone bias output control
29 ROW1 O Key scan output 1
30 NC — Not used. (Open)
31 – 34 ROW2 – 5 O Key scan output 2 – 5
35, 36 — — Not used. (Open)
37 BATT-LOW I Battery low level detection input
38 CHG-DET I Charge detection input (H: Charge)
39 VDD — Power supply pin (+3 V)
40 TEST SW I Test mode activation input (H: Start)
41 — — Not used. (Connect to ground.)
42, 43 NC — Not used. (Open)
44 TESTACT I During test mode, causes start of intermittent operation with external input.
45 RSSI H/L O RSSI sensitivity select output (L: Low sensitivity)
46 H.MUTE O Half mute control output (L: Mute ON)
47 BATT-DET I Battery detection input (H: Battery detection)
48 LED O TALK/BATT LOW LED control output (L: LED ON)
– 17 – – 18 –

5-2. BLOCK DIAGRAM — BASE UNIT SECTION —
SPP-69/79
– 19 – – 20 –
BPF1
46MHz
BPF51
49MHz
CF101
460kHz
ANT1
TELESCOPIC
ANTENNA
1st
MIX
RX
PLL TX
PLL
RX
VCO
1st
MIX
IN
2nd
MIX
IN IF-IN PRE-IN EXP-OUTAF-OUT
D-COMP-IN
1st
MIX
OUT 2nd
MIX QUAD
2nd
MIX
OUT
CF102
10.68MHz
RSSI
EXPANDER
PRE
AMP
LPF
IF
AMP
RX-OUT
D-COMP-OUT
VCO-CONT VCO2 VCO1
40 38 36 34
46424443
LOCAL
OSC
LO2LO1 4TX-IN TX-OUT RSSI
1 47 22 233
X101
10.22MHz
L101
RX VT
L52
TX VT
32 27
DATA
COMP
24
TX
AMP
Q51
TX
OSC
Q52
MODULATION
D51
19 4
7
SYSTEM CONTROL
IC501
RSSI H/L RX-DATA TX-DATA 6
H-MUTE
3
CLK
FIL-OUT COMP-OUT MIC-IN
B+(+5.2V)
MIC
AMP
FIL-IN
SPLATTER
9 10
6
11 14
DATA LATCH
CONTROL
CLK
7
DATA
8
STB
5
28
15 17 18
E-MUTE
20
19
RECE-IN R02
R01
RECEIVER
AMP
EXPANDER
IC101 (2/3)
C-MUTE COMPRESSOR
LIMITER
SIG-OUT
COMPRESSOR
IC101 (3/3)
2
DATA 1
STB
5
SIG-IN
20
DP
30
910
12
14
RING
21
DTMF
16
PAGE
17
18
DIAL MODE
X501
4.048MHz
RESET
Q302
REG
IC302
TX +B
SWITCH
Q54
CHARGE
DET
Q401
CHARGE
REG
Q402
CHARGE
LIMITER
Q403
VOLTAGE
DET
IC301 31
CHG DET
RESET
POW-DET
22 TX +B CTRL
OSC1 OSC2
B+ (+9V)
B+ (+5.2V)
+
CHARGE
TERMINAL
FL101
460kHz
RX LEVEL
B+ (+5.2V)
MIX, IF AMP, DET
IC101 (1/3)
04
LINE TX
DRIVE
Q202
D401
CHARGE
J301
DC IN 9V
S301
HANDSET LOCATOR
S302
DIAL MODE
T
P
B+ (+5.2V)
HOOK-SW
DRIVE
Q201
RING DET
PH201
D204
HOOK-SW
PH202 D203
D205
RECT
T201
LINE
TRANSFORMER
MJ201
LINE
D101
Signal path
: TX (To Tel Line)
: RX (From Tel Line)
: bell
RV101
RSSI Hi
31
LINE TX
DRIVE
Q203
–
4 3
RX BUFFER
IC303
RX
OUT RX IN

5-3. BLOCK DIAGRAM — HANDSET SECTION —
SPP-69/79
– 21 – – 22 –
BPF1
49MHz
BPF51
46MHz
CF101
460kHz
ANT2
HELICAL
ANTENNA
1st
MIX
RX
PLL TX PLL
RX
VCO
1st
MIX IN
2nd
MIX
IN IF-IN PRE-IN EXP-OUTAF-OUT
D-COMP-IN
1st
MIX
OUT 2nd
MIX QUAD
2nd
MIX
OUT
CF102
10.68MHz
RSSI
QUAD
EXPANDER
PRE
AMP
LPF
IF
AMP
RX-OUT
D-COMP-OUT
VCO-CONT VCO2 VCO1
40 38 36 34
46424443
LOCAL
OSC
LO2LO1 4TX-IN TX-OUT RSSI
1 47 22 233
X101
10.2MHz
L102
RX VT
L52
TX VT
32 27
DATA
COMP
24
TX
AMP
Q51
KEY LED
DRIVE
Q401
TX
OSC
Q52
MODULATION
D51
45
13
8
9
SYSTEM CONTROL
IC501
RSSI
H/L RX-DATA
TX DATA 10
TX DATA
46
H. MUTE
7
PLL-CLK
TX +B CTRL
48 LED
38 CHG-DET
FIL-OUT COMP-OUT MIC-IN
MIC
AMP
VCC1
FIL-IN
SPLATTER
9 10
6
11 14
33
DATA LATCH
CONTROL
BATT
ALARM
CLK
7
DATA
8
STB
21 5
BAT-ALM
28
15 17
18
E-MUTE
20
19
RECE-IN R02
R01
RECEIVER
AMP
SP1
SPEAKER
VOL
S101
H
M
L
EXPANDER
IC101 (2/3)
C-MUTE COMPRESSOR
LIMITER
SIG-OUT
COMPRESSOR
IC101 (3/3)
B+ (+3.6V)
MIC1
MICROPHONE
5
PLL-DATA 4
PLL-STB 37
BATT-LOW 3
SIG-IN 28
MIC
BATT LOW
SWITCH
Q502
11
DEEP
2
KEY LED
2017
14
23
22
12
21
29, 31-34
ROW1-ROW5
24-27
COL0-COL3
BUZZER
DRIVE
Q301 BZ301
BUZZER
KEY MATRIX
S1-S19
X501
4.048MHz
COL3
ROW3
D502
RESET
Q201
TX +B
SWITCH
Q54
VOLTAGE
DET
IC201
HOLD/RESET
Q501
31
D504
RX +B CTRL
ACT4
ACT3
HOLD
RESET
OSC1 OSC2
D501
TALK/BATT LOW
B+ (+3.6V)
D202
B+
(+3.6V)
–
+
CHARGE
TERMINAL
CN201
CN202
RECHARGEABLE
BATTERY
BP-T16
DC 3.6V
270mAh
FL101
460kHz
RX LEVEL
B+ (+3.6V)
MIX, IF AMP, DET
IC101 (1/3)
04
Signal path
: TX (To Tel Line)
: RX (From Tel Line)
+
–
5
4
RV101
RSSI Hi
D401-404
SPP-79

SPP-69/79
5-4. PRINTED WIRING BOARD — BASE UNIT SECTION —
Note on Printed Wiring Boards:
•X: parts extracted from the component side.
•f: internal component.
•b: Pattern from the side which enables seeing.
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.
•f: internal component.
•2: nonflammable resistor.
•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.
• Powervoltageis dc 12Vand fed withregulateddc power
supply from MJ201 with 100 Ωin series.
• Voltage is dc with respect to ground under no-signal
condition.
no mark : TALK
∗: Impossible to measure
• Voltages aretakenwith aVOM(Input impedance10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
N: TX (To Tel Line)
O: RX (From Tel Line)
P: bell
– 23 – – 24 –
D1 C-2
D51 G-2
D101 D-8
D201 B-9
D203 B-8
D204 B-8
D205 A-8
D206 B-2
D207 B-1
D208 G-9
D301 C-7
D401 B-5
D501 G-7
IC101 E-4
IC301 G-10
IC302 C-8
IC303 F-6
IC501 F-8
PH201 C-8
PH202 B-7
Q51 E-1
Q52 F-2
Q54 E-2
Q201 B-6
Q202 D-6
Q203 A-6
Q302 F-10
Q401 A-2
Q402 B-4
Q403 B-4
• Semiconductor
Location
Ref. No. Location