Sanyo CLT-99, Service Manual

Page: 6 / 25

2-2. TRANSMITTING (See FIG -5, TABLE -5, FIG -5.1, TABLE -5.1)
Test Equipment
• RF Electronic Voltmeter • Frequency Counter
• Linear Detector • AF Oscillator
• AC Adaptor (DC 12V ... Centre Minus) • Dummy Load (50
Ω
)
Unit Condition
* TEL line current 50mA at 48V
a) Press “
✱
” key, the channel will turn to CH 4. Confirm that the frequency is 30.1500MHz.
b) Slide S401 to “RINGER OFF” & S402 to “PULSE”, Rx MUTE will be ON.
Disconnect frequency counter from CN101, and connect RF voltmeter to CN101 (50
Ω
probe).
c) Tx POWER .... Adjust T203 so that the reading of RF voltmeter is 300
±
80mW.
T202 is a preset coil so no alignment is needed.
d) Tx MODULATION .... Connect linear detector to CN101.
Connect AF oscillator (1kHz, -20dBm) to TEL line.
Align VR601 to obtain 3.0kHz
±
0.15kHz dev. from the read of linear detector. And confirm at the AF
oscillator to TEL line .
300Hz, -20dBm: the read of linear detector is 2.2kHz
±
0.4kHz dev.
3kHz, -20dBm: the read of linear detector is 3.8kHz
±
0.6kHz dev.
e) Tx DATA .... After Tx modulation alignment, press & hold “REDIAL” key (S493).
MODULATION While pushing “REDIAL” key, Tx DATA is sent.
Check the read of linear detector is 5.0kHz
±
1.0kHz dev.
Adjustment (T-1)
(FIG -5)
(TABLE-5)
ADJUSTMENT
ADJUSTMENT
TEST POINT LOCATION
(REMOTE CONTROL)
:
PIN 11
<
TP001 / TP002
,
PIN 7
.
PIN 9
(
PIN 36
;
BATT. LOW LED
)
PIN 4
~
PIN 5
+
PIN 6
-
PIN 8
=
TALK LED
>
DIAL LED
/
PIN 10
-9-
-8-
2. ALIGNMENT FOR BASE STATION
NOTE : DURING ALIGNMENT, DISCONNECT THE ANTENNA WIRE FROM THE SET.
2-1. Tx/Rx VCO & Tx Frequency (See FIG -4, TABLE -4)
Test Equipment
• Digital Voltmeter
• AC Power Supply
(DC 12V ... Center Minus)
• Frequency Counter
Unit Condition
a) Set unit to “TEST1” mode by shorting “TEST” point (IC401 36 pin) to ground.
b) Connect the DC power supply.
c) Connect frequency counter to CN101.
d) Set switch S401 to “PULSE” position. Tx power will be ON.
e) Confirm the current channel is at CH 10, reading from the frequency counter is 30.300MHz
±
1.2kHz.
f) Connect digital voltmeter to Tx/Rx VCO test point.
g) Align T201 (Tx) to obtain 2.5
±
0.1VDC reading from the digital voltmeter respectively.
h) Align T103 (Rx) to obtain 1.5
±
0.1VDC reading from the digital voltmeter respectively.
Adjustment
(FIG -4)
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. Tx VCO Tx VCO side 10 T201 2.5V 2.5V
±
0.1VDC
2. Rx VCO Rx VCO side 10 T103 1.5V 1.5V
±
0.1VDC
3. Tx Freq. FREQ. side 10 NONE 30.300MHz 30.300MHz
±
1.2kHz
(TABLE -4)
RF
Electronic
Voltmeter
50
Ω
Dummy
Unit
CN101 (H)
CN101 (E)
R
Frequency
Counter
Tx VCO
Rx VCO
GND
Digital
Voltmeter
Unit
Tx
6 pin
4 pin Rx
IC301
CN101 (H)
CN101 (E)
STEP CONDITION CH ADJUST ADJUSTED VALUE SPECIFICATION
1. Tx POWER CARR side 4 T203 300mW 300mW
±
80mW
Unit
CN101 (H)
(TEL LINE) CN101 (E)
IC301 Pin18 GND
Output impedance
600
Ω
AF Oscillator
Freq. : 1kHz
Linear
Detector
Loop Simulator
Power Supply
48VDC 50mA
220
µ
F/10V
Adjustment (T-2)
(FIG -5.1)
–
+
CLT-99/SS (S/M) 6 12/1/00, 3:17 PM 6