Toshiba FT-7007LBR, Service Manual

Page: 7 / 43

6
Batt Terminal
DC Power Supply
2.4V
Digital Voltmeter
Balance Input
PORTABLE
RF Test
Point SP
Terminal
SG
MOD=1kHz
DEV=±3kHz
NOISE METER
SINAD
Meter
Dummy Load
(150-ohm)
Receiver
Test Equipment Required and Connections
• SG: RF Signal Generator, 46.770MHz • Dummy Load, 150-ohm
• Noise Meter • DC Power Supply: 2.4 V
• Digital Voltmeter • SINAD Meter
Alignment Point Location Main PCB
Preset
Turn Power On (Connect Battery) while depressing "
æ
" and " # " keys. A beep will be heard.
Alignment Procedure
L503
RX VCO Test Point RF Test Point
L502
RT502
RT501
DISCRI Test Point
Step Preset to Adjustment Remarks
1
SG: 1mV
No modulation
L503
Press the " 1 " key, then the TX Mode is entered.
Set the digital voltmeter at the test point of RX VCO (See page 25),
then adjust L503 to indicate DC 2.0 V ±0.05V.
2
SG: 1mV
No modulation
L502
Press the “ 4 ” key, then the RX Adjust Mode is entered.
Connect SG to RF Test Point. Set the digital voltmeter to the DISCRI
Test Point. Adjust L502 to indicate DC 0.9V ±0.05V.
3
SG: 1mV
1kHz ±3kHz
deviation
RT502
Connect the NOISE METER to the SP Terminal through a 150-ohm
dummy load, then adjust RT502 to indicate 140 ±5 mV.
4
SG: 0.09
"
V
1kHz ±3kHz
deviation
RT501
Press the “MEMO” key, then the SQ Adjust Mode is entered.
Connect SG to RF Test Point. Turn RT501 to fully clockwise and
confirm the Ringer SP501 does not ring.
Adjust RT501 to turn to counter clockwise slowly where the ringer
SP501 rings.