Receiving (Handset); Battery Low (Handset) - Sanyo CLA-1380 Service Manual

ADJUSTMENT
3. RECEIVING (HANDSET)
Test Equipment
(1) FM SSG (50
ohm,
OPEN type)
(2) AC Voltmeter
(3) DC Power Supply (DC 3.8V)
(4) Distortion meter
(6) Digital voltmeter
1. RXIF
(1)
(2)
(3)
Connect a FM SSG (1 kHz mod., 2.0 kHz dev.,
30.100 MHz, 46dBP) to the ANT test pin (CN151).
Connect an AF-VTVM and distortion meter in parallel
and terminate a 150 ohm dummy load across the SP
terminal.
Adjust T351 so that the reading of the AF voltmeter
is maximum level and minimum distortion at distor-
tion meter.
Unit Condition
(1)
(2)
Change to channel 6 by pushing "6", followed by
%" button.
Connect IC351 pin 16 to ground by electrical capaci-
tor (10,uF / 16 V). ------ HCC : OFF Mode
2.
RX
RF
(1) Connect a FM SSG (46 dBP + O dBP) to the ANT
test pin (CN151).
(2) Adjust T151 so that the reading of the distortion me-
ter is minimum distortion (less than IOYO).
3. RX AF LEVEL
(1) Connect a FM SSG (O dBP -46 dB~) to the ANT
test pin (CN151).
(2) Adjust VR352 so that the reading of the AF voltmeter '"
is 50 mV ~ 10 mV at SPEAKER output.
STEP CONDITION ADJUST I
ADJUST VALUE I SPECIFICATION ]
1. RXIF FM SSG :
46dB/ T351 MAXIMUM LEVEL
------
2. RX RF
FM SSG : OdB~
T151 MINIMUM DISTORTION less than 10%
3. RX AF LEVEL FM SSG : 46dBfl VR352 50 mV
50mV flOmV
CN151
Unit
L151 (DPX
SIDE)
Sp + 7
FM SSG
IC351
Voltmeter
GND Test
Pin 16
GND
Mod. :1
kHz
)
+
Dev. :2.0
kHz
Distortion
—
Meter
A
10,UFII6V
4. BATTERY LOW (HANDSET) Adjust
Test
Equipment
(1) Digital Voltmeter
(2) DC Power Supply
Unit Condition
(1)
(2)
(3)
(4)
Disconnect Ni-Cd battery
ply terminal.
Connect digital voltmeter
and ground.
feed 3.8V from power sup-
(1)
Adjust VR351 to obtain reading of OV at digital volt-
meter.
(2) Confirm at power supply as follows.
Power supply Voltmeter reading
3.35V
3.5V
<0.5V
>3.OV
across IC351 pin 36 (Hot)
I I I I
Change DC power supply from 3.8V + 3.4V.
IC351 Pin36
Give a full turn to VR351 at counterclockwise.
I
Digital
Voltmeter
I
GND
t
Unit
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