Sanyo CLT-138X User manual

IFILE NO. I
Service manual Cordless Telephone CLT-I 38X (AU)
CLT-I 38X (W)(AU)
CLT-I 38X (NZ)
CLT-I 38X (W)(NZ)
CLT-I 38 (RU)
SPECIFICATIONS
Transmitting frequency
Base station: .. 30.075-30.300 MHz
‘- Handset: ........ 39.775-40.000 MHz
Receiving frequency
Base station: .. 39.775-40.000 MHz
Handset: ........30.075-30.300 MHz
Noise Reduction ................. Compander IV
Memory Dia l...................... 10-number
Channel Access ................. 10 ch
Security Codes ................... 10 Milion(random)
Continuous Stanby ............. 14-days
Quick Talk Access .............. yes
Flash ....................... yes
Ring control ....................... yes
Specifications subject to change without notice.
PRODUCT CODE No.
16320293 (CLT-138WAU)
16320292 (CLT-138X(W)/AU)
163202 87(CLT-138X/NZ)
163202 86(CLT-138X(W)/NZ)
16320291 (CLT-138/RU)
Hearing-Aid Compatible ..... yes
Redial/Pause ...................... yes
Tone/Pulse ....................... yes
Antenna ....................... Rod/Rubber
Power SourceBase station: AC adaptor
AC 230-240V, 50Hz(AU/NZ)
AC 220V, 50Hz(RU)
DC9V
Handset: Ni-Cd battety: 3.6V, 270 mAH
Dimensions Base station: 115 (W) x64 (H) x232(D) mm
Handset: 55 (W) x198 (H) x53 (D) mm
(Without antenna)
Accessories ....................... AC adaptor
Telephone line cord
Instruction manual
Number Memory Index Sheet
Battery Pack
“L REFERENCE No. SM900109

ADJUSTMENT
CAUTION :DURING Alignment, 0PEN''AN7PA~ERN MARKED WlTH''SHOR7SlLK JUST LIKE MENTIONED
AT PAGE “PARTS LOCATION”, IF RUBBER ANTIS CONNECTED.
1.ALIGNMENT FOR REMOTE UNIT
1-1. Tx/Rx VCO &Tx Fre~
Test Equipment
“Digital Voltmeter
“DC Power Supply
“Frequency Counter
Unit Condition
(DC 3.8 V)
a) Disconnect Ni-Cd battery which feeds 3.8 Vfrom power supply terminal.
b) Set unit to “TEST” mode by shorting test point TPOO1 and TPO02 together.
c) Feed 3.8V Ni-Cd battery to power supply terminal.
d) Connect frequency counter to ANT test pin. Confirm the current channel is at 10ch.
e) Connect digital voltmeter to Tx/Rx VCO terminal points.
f) Align T253 (Tx) to obtain 2.2*O. 1VDC reading from digital voltmeter respectively.
g) AlignT153 (Rx) to obtain 1.5*0.1 VDC reading from digital voltmeter respectively.
h) Tx FREQUENCY “. . Confirm the Tx Freq is 40.000 MHz*l .2KHz (1Och) from Freq, counter.
Adjustment
Unit TX
IC351
Frequency 6PIN Tx VCO
Ant.(H)
Counter Ant.(E) 39 PIN Rx VCO
TEST(TPOOI&TPoo2) Gnd “‘:Y=-=-
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. Tx VCO Tx VCO side 10 T253 2.20V 2.20V* O.lv
2.Rx VCO Rx VCO side 10 T153 1.50V 1.50Vk O.lv
3.Tx Freq. 10 -40.000 MHZ t1.2 KHZ
-1-

miiiiil
ADJUSTMENT
.Frequency Counter
.AFOscillator
.Dummy Load (50 S2)
1-2. TRANSMITTING
Test Equipment
.RF Electronic Voltmeter
.Linear Detector
.DC Power Supply (DC 3.8 V)
Unit Condition
a) Push “FLASH” Key. The CH will turn to 7th. Then Rx MUTE is ON.
b) Tx POWER “-. Disconnect Frequency Counter from ANT pin.
Connect RF electronic voltmeter to ANT test pin.(50 Q probe)
Confirm that the Tx power level is 6.0*3dBm at RF voltmeter.
c) Tx MODULATION ..” Disconnect RF electronic Voltmeter from ANT test pin and connect
Linear detector to ANT test pin.
.” -Inject AF oscillator (1KHz, 10mV) to microphone input.
.” -Align VR651 to obtain 2.0*0.1 KHz dev. from Linear detector. And Check
3kHz~2.1 ~0.5KHz dev
300Hz~l .5*0.3kHz dev
d) Tx DATA “”. After TX Modulation Alignment. Push “Talk” key.
..” Check the read of linear detector 3.8*1 .OKHZ dev.
Adjustment (T-1) Unit
ANT
RF
oRElectronic
GND FREQ. Voltmeter
TEST(TPOOI &TPO02)
I
50 QDummy
I I
1, Frequency
Counter
Adjustment (T-21
Unit
100 ~F
+~–
AF MIC ANT Linear
Oscillator .GND GND Detector
Mod. :1kHz TEST
Mic :10mV 1
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. Tx LEVEL CARR side 7NONE NONE 6.0 ~3.odBm
2. Tx Mod. osc output: 1KHz 7VR651 2.0 KHz dev. 2.0 ~0.1 KHz dev.
(MIC) 300Hz 7-1.5 ~0.3 KHz dev
3KHz 7-2.1 *0.5 KHz dev.
3. TX DATA 7-3.8 ~1.0 KHz dev.
-2-

ADJUSTMENT
1-3. RECEIVING
Test Equipment
.FM SSG (50 Q :OPEN TYPE) .Distortion Meter
.AC Voltmeter (AFVM) .Digital Voltmeter
oDC Power Supply (DC 3.0-3.8 V) “Oscilloscope
Unit Condition
a) Push “#” key to select Rx 6th. The Tx frequency is 39.9000 MHz and Rx one is 30.200MHz.
b) Disconnect Linear detector from ANT test pin and connect FM SSG (1KHz mod., 2.OKHZ dev.,
30.200MHz, 46dB~V) to ANT test pin.
c) Connect AFVM and distortion meter in parallel and terminate a 150 Qdummy load
across the SP terminal.
d) Rx IF
e) Rx AF Level
f) Rx RF
g)CD Level Check
h) Batt. Low
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
...
...
...
Align T351 to obtain maximum deflection and minimum distortion at AFVM and distortion
meter respectively. (SP OUT :Max)
Align VR351 to obtain 44mV*5mV Speaker output at AFVM at volume Normal.
Confirm the Speaker output is 50-95 mV.(FM SSG:300HZ mod, 46dB pV.)
Confirm the Speaker output is 10-18mV.(FM SSG:3KHZ mod, 46dB AV.)
Push “MEMORY” key to change volume to High.
Confirm the Speaker output at 1KHz is 50-95mV.
Reduce the output level of FM SSG from 46dB A V ~+5dB ~V.
Confirm the distortion is less than 10%(SINAD 20dB) at the distortion meter.
(FM SSG :1 KHz mod, 2.OKHZ dev, 30.200MHz)
Connect OSCILLOSCOPE to CD OUT (IC351 13pin).
Push “END” key to off Tx Power. (CAUTION: SP Output is muted.)
Confirm CD level is High ~Low when FM SSG is O--+ +18dB~V.
Confirm CD level is High when FM SSG is O~+4dB KV.
Connect DC Voltmeter to Batt. Low detct.
Confirm the Batt. Low ouput of 14pin (IC351 )is High level when DC Power Supply is 3.5V.
Confirm the Batt. Low ouput of 14pin (IC351 )is Low level when DC Power Supply is 3.05V.
Adjustment (T-3)
OSCILLO
SCOPE
DC
Voltmeter —
—
Unit
IC351 13 PIN
FM SSG EAR SP AF
ANT GND — — Voltmeter
Mod. :1 KHz
Dev. :2.0 KHz Distortion
Meter
TEST
-3-

ADJUSTMENT
STEP CONDITION CH ADJUST ADJUSTEDVALUE SPECIFICATION
1.IF SSG Output: 46dB PV 6T351 Minimum Distortion
2. RF SSG Output :+5dB pV 6NONE NONE Less than 10%
3.AF LEVEL (1KHz) 6VR351 50mV 44mVf5mV
(Vol.normal) (300Hz) 6NONE NONE 50-95mV
(3KHZ) 6NONE NONE 10-18mV
4. AF LEVEL (1KHz) 6NONE NONE 50-95mV
(Vol.High)
5. CD Levelcheck 0-++18dBp V6NONE NONE CD OUT:High~Low
(TxPOOFF) O-++4dB~V 6NONE NONE CD OUT:High~High
6.Batt. Low DC Level:3.50V 6NONE NONE Batt. Low Out:High
DC Level:3.05V 6NONE NONE Batt. Low Out:Low
L
TEST POINT LOCATION During alignment,’’ANT. OPEN”.
MIC IN(E) TPOO1 TPO02 BATT. LOW Tx VCO After alignment,’’SHOR7 point.
\\\/ I\
MIC’IN (H) CD SP OUT (E) SP OUT (H) Rx VCO RF IN (H) RF IN (E)
PARTS LOCATION
LWhen measurement,
this pattern is opened.
T253 VR651 ANT
Test Point (TPO02) SP (H) Tx VCO \‘x ‘Co Tx Mod. Test Pin
L
u
Q\
o
\
‘1
01
CN151
o
ANT
E\——
MJE)~—
I—I—7 \~-\—
MIC (H) lC35JJ3pin VR351 T351 Rx VCO T153
Rx LEVEL Rx IF Rx VCO
-4-

.-.------- ..-
ALJJU51 MEN I
1. ALIGNMENT FOR BASE UNIT
NOTE: During alignment, disconnect the antenna wire from the set.
Before connecting DC 9.OV to unit, short circuit “TESTI” or “TEST2” silk mark of Bside pattern.
1-1. Tx/Rx VCO &Tx Frequency (see FIG-1, TABLE-1 )
Test Equipment
“Digital Voltmeter
.DC Power Supply (DC 9.0 V----- CENTER MINUS)
“Frequency Counter
Unit Condition
a) Set unit to “TEST1” mode by shorting “TEST1” point (IC401 19pin) to ground.
b) Discharge C401 (Jl 04). Connect the DC Power Supply into the DC Jack.
c) Connect Frequency counter to CN1 01.
d) Set switch S407 to “PULSE” position. Tx power will be ON.
e) Confirm the current channel is at 10ch,reading from the frequency counter is 30.000 MHz ~1 .2KHz.
fi Connect digital voltmeter to TX/RX VCO test point.
g) Align T201 (Tx) to obtain 2.5*0.1 VDC from the read of digital voltmeter respectively.
h) AlignT103 (Rx) to obtain 1.5Y0.1 VDC from the read of digital voltmeter respectively.
Adjustment
D
Frequency
Counter
Unit
TIC301
E
Tx
6pin Tx VCO
CN101 (H) 42 pin Rx VCO
CN101 (E) Rx
GND
J104 I
Digital
Volt meter
+10Q
(FIG-1) G;D
STEP CONDITION a-l ADJUST ADJUSTEDVALUE SPECIFICATION
1.TxVCO Tx VCOside 10 T201 2.5 V2,50V *0.1 V
2.RxVCO RxVCOside 10 T103 1.5V 1.5ovfo,lv
3.Tx Freq. Freq.side 10 NONE NONE 30.300MHZ *1 .2KHZ
(TABLE-1)
1-2. TRANSMllTING
Test Equipment
“RF Electronic Voltmeter
.Linear Detector
.AC Adaptor (DC 9.OV ---- CENTER MINUS)
.Frequency Counter
.AF Oscillator
“Dummy Load (50 Q )
-5-

ADJUSTMENT
Unit Condition
*TEL line current 50mA at 48V
a) Disconnect the AC adaptor.
Set unit to “TEST3” mode by shorting “TEST2” point (IC401 20pin) to ground.
(Now, both “TEST1” and “TEST2” point is shorting.) Discharge C401 (J104).
Then Connect AC adaptor again. Confirm current channel is at 7ch (30.225 MHz).
b) Disconnect frequency counter from CN1 01, and connect RF voltmetertoCN101 (50S2 probe).
c) TX Power 1. Align T202 to the maximum power obtainable from the reading of the RF voltmeter.
(+5dBm*3dBm)
d) TX MODULATION 1. Connect Linear detector to CNI 01.
2. Connect AF oscillator (1KHz, -20dBm) to TEL line.
3. Align VR601 to obtain 1.7*0.1 OKHZ dev. from the read of linear detector.
And confirm at the AF oscillator to TEL line,
300 Hz,-20dBm :the read of linear detector 1.3kHz*0.3kHz dev.
3kHz,-20dBm :the read of linear detector 2.6kHz*0.5kHz dev.
e) TX DATA 1. After Tx MODULATION Alignment, Push “PAGE” key (S451 ).
MODULATION (While pushing “PAGE” key, Tx DATA is sent.)
2. Check the read of linear detector is 3.8t 1.0 kHz dev.
Adjustment (T-1 ]Unit
J104 CN101 (H)
i~
Electronic
CN 101 (E) Voltmeter
50 QDummy
10Q
&(FIG-2)
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. Tx LEVEL CARR side 7T202 ●F5.OdBm +5dBm*3.OdBm
Adjustment (T-2) (TABLE-2)
Output impedance
600 QUnit
AF CNIO1 (H)
Loop (TEL Line) Linear
Oscillator Simulator CN101 (E) Detector
Freq. :1 KHz GND
w(FIG-3,
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1.LINE MOD. OSC OUTPUT: 1kHz 7VR601 1.7KHz dev 1.7 t0.1 KHz dev.
-20dBm 300 Hz 7NONE NONE 1.3 ~0.3 KHz dev.
3kHz 7NONE NONE 2.6 *0.5 KHz dev.
2. DATAMOD. 7NONE NONE 3.8 t1.0 KHz dev.
(TABLE-3)
-6-

ADJUSTMENT
1-3.RECEIVING
Test Equipment
(see FIG-4,TABLE-4)
.Distortion Meter
.Dummy Load (600 Q)
“FM SSG (50s2 :OPEN TYPE)
.AC Voltmeter (ACVM)
.AC Adaptor (DC 9.0 V---- CENTER MINUS)
Unit Condition
a) Disconnect AC Adaptor.
Open “TEST1” pinto enter the “TEST2” mode. (Now only “TEST2” point is shorting.)
Discharge C401 (JI04), and connect AC Adaptor.
b) Disconnect AF oscillator from TEL line, and connect AC voltmeter in parallel with distortion meter, terminated with
600Q during load to the TEL line.
c) Disconnect Linear detector from CN101 and connect FM SSG (1kHz, 2.0kHz dev., 39.900MHz, 46dB pV) to CNI 01.
Push “PAGE” key 1time in order to enter the Rx mode.
d) Rx IF . . .
e) Rx RF ...
...
f) Rx AF Level “””
. . .
g)CD Level Check . . .
...
...
...
Align T301 to obtain maximum deflection and minimum distortion from the read of AC
voltmeter and distortion meter respectively.
Change output level of FM SSG from 46dB pV~+5dB pV.
Align T1 01, to obtain minimum distortion at the distortion meter (less than 10%).
Change output level of FM SSG from 5dB A V ~46dB AV.
Align VR301 to obtain -5dBm~0.5dBm from read of AC voltmeter, and confirm at the
FM SSG input of
300Hz (46dB pV) :the output of ACVM -6.0dBmt3dBm
3kHz (46dB pV) :the output of ACVM -14.5dBm~3dBm
Switch position S407 ~TONE (TX “OFF”).
Connect OSCILLOSCOPE to CD OUT.
Confirm CD level is High ~Low when FM SSG is O~ + 20dBA.
Confirm CD level is High when FM SSG is O~+4dBp.
Adjustment
Unit
(FIG-4)
SSG
(TEL .600 C?
CNIOI (H) Loop
FM SSG line) Simulator Voltmeter
CN101 (E)
Mod. :1 kHz
Dev. :2.0 kHz Power Distortion
supply
48VDc,50mA Meter
STEP CONDITION a-l ADJUST ADJUSTEDVALUE SPECIFICATION
1.IF SSGOutput:46dB/V 6T301 MaximumLevel Lessthan 5%
2.RF SSGOutput: 5dBKV 6T101 Minimumdistortion Lessthan 10Y.
3. AF LEVEL SSG :46dBPV (1KHz) 6VR301 -3dBm -5dBmt0.5dBm
(300Hz) 6NONE NONE -6.OdBmt3dBm
(3KHZ) 6NONE NONE -14.5dBmt3dBm
4.CDLEVEL SSGOutput: O-+20dB pV6NONE NONE CDOUT:High-+Low
TXPO“OFF” O++ 4dBpV NONE NONE CD OUT:High~High
(TABLE-4)
-7-
-----

ADJUSTMENT
.-. 10CH Frequency List of Cordless Telephone
(for Australia, New Zealand and Russia Version)
L
ZaEi
1
2
3
4
5
6
7
8
9
10
BASE UNIT
Tx Freq.(MHz) Rx Freq.(MHz)
30.075 39.775
30.100
30.125
30.150
30.175
30.200
30.225
30.250
30.275
39.800
39.825
39.850
39.875
39.900
39.925
39.950
39.975
30.300 I40.000
Rx Local(MHz)
29.080
29.105
29.130
29.155
29.180
29.205
29.230
29.255
29.280
29.305
REMOTE UNIT
CH (No.) Tx Freq.(MHz) Rx Freq.(MHz) Rx Local(MHz)
139.775 30.075 19.380
2
3
4
5
6
7
8
9
10
39.800
39.825
39.850
39.875
39.900
39.925
39.950
39.975
40.000
30.100
30.125
30.150
30.175
30.200
30.225
30.250
30.275
30.300
19.405
19.430
19.455
19.480
19.505
19.530
19.555
19.580
19.605
1st IF: 10.695MHz, 2nd IF: 455 KHz
-8-

ADJUSTMENT
TEST POINT LOCATION
TEST 1TEST 2
,
CD Tx VCO RxVCO ANT.(H) ANT.(E)
PARTS LOCATION
I@ El ❑
oT101
Rx RF
]PA8254EY ,x:;;:;,, T301
Rx IF
F
o~T103
J
~CNIOl
Rx VCO
C107
I@ xVco
VR601 C2’3T ❑ ❑ ~
Tx ON
Tx MOD.
R625 Tx VCO T201 T202
CD”* Tx VCO Tx Power
1JI04 S407 Tx OFF
-9-