Sanyo CLT-538 User manual

FILE NO.
Service manual
SPECIFICATIONS
Transmitting frequency
LBase 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 1...................... 10-number
Channel Access ................. 10ch
Security Codes ................... 10 Milion(random)
Continuous Stanby ............. 14-days
Quick Talk Access .............. yes
Flash ....................... yes
Ring control ....................... yes
Specifications subject to change without notice.
Cordless Telephone CLT-538X (AU)
CLT-538X (NZ)
CLT-538 (FW)
PRODUCT CODE No.
16320396 (CLT-5381UAU)
16320391 (CLT-538WNZ)
16320395 (CLT-538/RU)
Hearing-Aid Compatible . . yes
Redial/Pause ...................... yes
Tone/Pulse ....................... yes
Antenna ....................... Rod/Rubber
Power SourceBase station:
Handset:
Dimensions Base station:
Handset:
Accessories ....................
AC adaptor
AC 230-240V, 50Hz(AU/NZ)
AC 220V, 50 Hz(RU)
DC9V
Ni-Cd battery: 3.6V, 270 mAH
158 (W) x58 (H) x232(D) mm
55 (W) x198 (H) x53 (D) mm
(Without antenna)
AC adaptor
Telephone line cord
Instruction manual
Number Memory index Sheet
Battery Pack
REFERENCE No. SM9OO11O

I
ADJUSTMENT
CAUTION :DURING Alignment, OPEN ''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 Freq.
Test Equipment
.Digital Voltmeter
“DC Power Supply (DC 3.8 V)
“Frequency Counter
Unit Condition
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 2.2~0.l VDC reading from digital voltmeter respectively.
[g) AlignT153 (Rx) to obtain 1.5t0.l 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 6PIN Tx VCO 0? Digital
Frequency Ant.(H)
Counter Ant.(E) 39 PIN Rx VCO r‘x oVoltmeter
TEsT(TPoo1&TPoo2) Gnd I
I I
ISTEP ICONDITION ICH IADJUST IADJUSTED VALUE ISPECIFICATION [
1.Tx VCO Tx VCO side 10 T253 2.20V 2.20V *O.lv
2. Rx VCO Rx VCO side 10 T153 1.50V 1.50V kO.lv
3. Tx Frea. 10 -40.000MHZ *1.2KHZ
-1-

ADJUSTMENT
l-2.TRANsMll-rlNG
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.
bj Tx POWER -
c) Tx MODULATION
d) Tx DATA
Adjustment (T-11
Adjustment (T-2)
. . .
...
...
. . .
...
. . .
.Frequency Counter
.AF Oscillator
“Dummy Load (50(2)
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.
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+1 .5+0.3kHz dev
After TX Modulation Alignment. Push “Talk key.
Check the read of linear detector 3.8&l .OKHZ dev.
lJnit %G--
I I 50 QDummy
RF
Electronic
Voltmeter
1, Frequency
Counter
Unit
100 VF
+~–
Al= MIC ANT Linear
Oscillator GND GND Detector
Mod. :1kHz TEST
Mic :10mV [
STEP CONDITION ICHI mwsT IADJUSTED VALUE ISPECIFICATION
1. Tx LEVEL CARR side 7NONE NONE 6.() ~3.OdBm
2. Tx Mod. osc output: 1KHz 7VR651 2.0 KHz dev. 2.() &0.1 KHz dev+
(MIC) 300Hz 7-1.5 ~0.3 KHz dev.
3KHz 7-2.1 ~0.5 KHz dev.
-2-

ADJUSTMENT
1-3. RECEIVING
Test Equipment
.FM SSG (50 Q :OPEN TYPE) “Distortion Meter
.AC Voltmeter (AFVM) “Digital Voltmeter
.DC 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., 2.0 KHz dev.,
30.200MHz, 46dB pV) 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 KV.)
Confirm the Speaker output is 10-18mV.(FM SSG:3KHZ mod, 46dB pV.)
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 pV~+5dB pV.
Confirm the distortion is less than 10O/O(SINAD20dB) at the distortion meter
(FM SSG :1 KHz mod, 2.0KHz 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 pV.
Confirm CD level is High when FM SSG is O~+4dBp V.
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
FM SSG IC351 13 PIN EAR SP AF
ANT GND —Voltmeter
Mod. :1 KHz L
Dev. :2.0 KHz Distortion
Meter
TEST &
-3-

ADJUSTMENT
STEP CONDITION CH ADJUST ADJUSTEDVALUE SPECIFICATION
1.IF SSG Output :46dB gV 6T351 Minimum Distortion
2, RF SSG Output :+5dB PV 6NONE NONE Less than 107.
3.AF LEVEL (1KHz) 6VR351 50mV 44mV+5mV
(Vol. normal) (300Hz) 6NONE NONE 50-95mV
(3KHZ) 6NONE NONE 10-18mV
4. AF LEVEL (lKHz) 6NONE NONE 50-95mV
+H%Tt (1++1 RdR IIV 6NONE NONE CD OUT: High+ Low
6NONE NONE CD OUT: High+High
6NONE NONE Batt. Low Out:High
{/ GN~NF NONE Batt. Low Out: Low
d. WV LGVGI “,,-”,. .,, -”-p..
(Tx PO OFF) ()++4dBg V
6.Batt. Low DC Level:3.50V
DC Level:3.05i 1.1,----- 1<
TEST POINT LOCATION During alignment,’’ANT. OPEN”.
MIC ,IN(E) TPOO1 TPO02 BAIT. LOW Tx VCO After alignment,’’~HORT” point.
\ ! /
MIC’IN (H) CD SP OUT (E) SP OUT (H) Rx VCO RF IN (H) RF IN (E)
PARTS LOCATION
When measurement,
BAIT LOW
Test Point (TPO02) EAR;;;~&~~~;n
‘\&\ o
0
0
0●
o
I“J
_J:~_/!!q \Y:”
MIC (E)
MIC (H) lC35~;3pin VR351 T351 Rx VCO T153
Rx LEVEL Rx IF Rx VCO
-4-

ADJUSTMENT
1. ALIGNMENT FOR BASE UNIT
NOTE: During alignment, disconnect the antenna wire from the set.
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) Discharge J1 65.
b) Connect Frequency countertoCN101.
c) Pushing “SPK” key, connect the AC adaptor and slide S402 from “PULSE” to “TONE”.
Then slide S402 to “PULSE” again. Tx power will be ON.
(Note :For NZ version dummy switch is necessary to simulate the TONE/PULSE SW).
d) Confirm the current channel is at 10ch.
e) Connect digital voltmeter to TX/RX VCO test point.
f) Align T201 (Tx) to obtain 2.5*0.1 VDC from the read of digital voltmeter respectively.
g) AlignT103 (Rx) to obtain 1.5*0. IVDC from the read of digital voltmeter respectively.
h) Confirm the frequency is 30.300 MHz~l .2kHz. (1Och).
Adjustment Unit
T
IC301 Tx
6pin Tx VCO
CN101 (H)
Frequency 42 pin Rx VCO oDigital
Counter CN101 (E) Rx Voltmeter
GND ,
IJ165 I
I
*10Q
(FIG-1) ~
GND
STEP CONDITION u-l ADJUST ADJUSTEDVALUE SPECIFICATION
1.TxVCO Tx VCOside 10 T201 2.5 V2.50V *0.1 V
2. RxVco Rx VCO side 10 TI 03 1.5V 1.50V*O.l V
3Tx Free. Frea. side 10 NONE 30,300 MHZ 30.300 MHZ fl .2KHZ
(TABLE-1)
1-2. TRANSMH7NG
Test Equipment
“RF Electronic Voltmeter
“Linear Detector
“AC Adaptor (DC 9.OV ---- CENTER MINUS)
-Frequency Counter
“AF Oscillator
-Dummy Load (50S2)
-5-

ADJUSTMENT
Unit Condition
*TEL line current 50mA at 48V
a) Push” *” key, the ch will turn to 7th.
b) Slide S401 to “RINGER ON”, Rx MUTE will be ON.
Disconnect frequency counter from CN1 01, and connect RF voltmetertoCN101 (50 Q probe).
c) TX Power
d) TX MODULATION
e) TX DATA
MODULATION
Adjustment (T-m
1. Align T202 to the maximum power obtainable from the reading of the RF voltmeter
(+5dBm~3dBm)
1. Connect Linear detectortoCN101.
2. Connect AF oscillator (1KHz, -20dBm) to TEL line.
3. Align VR601 to obtain 1.7t0.l 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.
1. After Tx MODULATION Alignment, Push “REDIAL” key (S493).
(While pushing “REDIAL” I&y, Tx DATA is sent.)
2. Check the read of linear detector is 3.8+ 1.0 kHz dev.
Unit
CN101 (H)
CN 101 (E) 50 QDummy
(FIG-2)
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. Tx LEVEL CARR side 7T202 MAXIMUM -1-5 dBm*3.OdBm
Adjustment (T-2~ (TABLE-2)
Output impedance
600 QUnit
CNIOI (H)
AF Loop (TEL Line) Linear
Oscillator Simulator CN101 (E) Detector
Freq. :1 KHz rl
Power
supply
48VDC 50mA (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 t0.3 KHz dev.
3kHz 7NONE NONE 2.6 ~0.5 KHz dev.
2. DATAMOD. 7NONE NONE 3.8 ~1,() KHz dev.
(TABLE-3)
-6-

“Distortion Meter
.Dummy Load (600 ‘d)
ADJUSTMENT
1-3. RECEIVING (see FIG-4, TABLE-4)
Test Equipment
sFM SSG (50 Q :OPEN TYPE)
-AC Voltmeter (ACVM)
.AC Adaptor (DC 9.0 V---- CENTER MINUS)
Unit Condition
a) Disconnect AC Adaptor. Discharge J165.
b) Disconnect AF oscillator from TEL line, and connect AC voltmeter in parallel with distortion meter, terminated with
600S2 during load to the TEL line.
c) Disconnect Linear detector from CN101 and connect FM SSG (1kHz, 2.0kHz dev., 39.900MHz, 46dB AV) to CNI 01.
d) Pushing “SPK” key, connect AC Adaptor and slide S402 from “PULSE” to “TONE”.
Then push “FLASH” key. The ch will turn to 6th.
Slide S402 to “PULSE”, and S401 to “RINGER OFF”.
(Sliding S401 to “RINGER OFF”, Rx mute will be OFF.)
(Note: for NZ version dummy switch is necessary to simulate the TONE/PULSE SW.)
e) Rx IF ...
f) Rx RF ...
. . .
g) Rx AF Level -.”
...
h)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 K V ~+5dB AV.
Align T101, 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*0.5dB from read of AC voltmeter, and confirm at the
FM SSG input of
300Hz (46dB pV) :the output of ACVM -6.0dBmt3dB.
3kHz (46dB AV) :the output of ACVM -14.5dBm~3dB.
Switch position S402 ~TONE (TX “OFF”).
Connect OSCILLOSCOPE to CD OUT.
Confirm CD level is High ~Low when FM SSG is O~ + 20dBp.
Confirm CD level is High when FM SSG is O~+4dB L.
Adjustment SSG
IIUnit
CN101 (H) (TEL 600 Q
Loop AC
FM SSG line) Simulator RVoltmeter
CN101 (E) ,
Mod. :1 kHz
Dev. :2.0 kHz mm
(FIG-4)
STEP CONDITION a-i ADJUST ADJUSTEDVALUE SPECIFICATION
1.IF SSGOutput:46dBjJV 6T301 MaximumLevel Less than 5%
2. RF SSG Output: 5dB/JV6TIO1 Minimumdistortion Lessthan 10%
3.AF LEVEL SSG :46dBpV (1Ktiz) 6VR301 -5dBm -5dBm~0,5dB
(300Hz) 6NONE NONE -6dBm*3dB
(3KHZ) 6NONE NONE -14.5dBmt3dB
4.CD LEVEL SSG Output: O~+20dB pV6NONE NONE CD OUT: High~Low
()++ 4dB /VNONE NONE CD OUT: High~High
(TABLE-4)
-7-

ADJUSTMENT
‘- 10CH Frequency List of Cordless Telephone
BASE UNIT
“L
L
=1
2
3
4
5
6
7
8
9
10
E1
2
3
4
5
6
7
8
9
10
Tx Freq.(MHz)
30.075
30.100
30.125
30.150
30.175
30.200
30.225
30.250
30.275
30.300
Rx Freq.(MHz)
39.775
39.800
39.825
39.850
39.875
39.900
39.925
39.950
39.975
40.000
Tx Freq.(MHz)
39.775
39.800
39.825
39.85@
39.875
39.900
39.925
39.950
39.975
40.000
REMOTE UNIT
Rx Freq.(MHz)
30.075
30.100
30.125
30.150
30.175
30.200
30.225
30.250
30.275
30.300
Rx Local(MHz)
29.080
29.105
29.130
29.155
29.180
29.205
29.230
29.255
29.280
29.305
Rx Local(MHz)
19.380
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
‘L. -8-

ADJUSTMENT
TEST POINT LOCATION DUMMY SWITCH FOR NZ ONLY, NOTE: FOR NZ MODEL DUE
TO PWB DOES NOT
HAVE TONE/PULSE
SWITCH, DUMMY
SWITCH MUST BE
USED FOR ACCESS
TEST MODE.
MlC(E) MlC(+) ANT(H) ANT(E) Rx VCO Tx VCO
PARTS LOCATION
Ir(Mod. Tx)
(Tx POWER) (“co Tx) (Tx Vco) vR601
❑
(ANT G❑=
b
‘~ ❑ ❑~~o~
(ANT H) T202 ’201 Q(SP KEY)
C213
J241 CNIO1
—
lc(-)~/lJ161 ❑@jx Vco)
(VCU3 @(-.,o~
MlC(+) ❑❑
/“=1 l=POINT) “ “ ❑
T101
J164 (RF Rx) T301
‘x “LLER J129 0
(IF Rx) VR301
[LEV. Rx)
rC402
-9-