— 6 —
RECEIVER
Test Equipment Required and Connections
•
SG: RF Signal Generator, 46.770 MHz, 46.610 MHz
•
Dummy Load, 150-ohm
•
VTVM
•
DC Power Supply: 3.6 V
•
Digital Voltmeter
•
SINAD Meter
Alignment Point Location on Main (Handset Unit) PCB
Preset
a) Turn Power on while depressing “ ” and “#” keys. A beep will be heard. Then the TX Mode is entered (CH21).
b) Press “4” key, then the RX ADJ Mode is entered (CH21).
Alignment Procedure
Step
Preset to
Adjustment
Remarks
1
L505
Connect the digital voltmeter to the test point (RX VCO).
Adjust for 1.4 V DC at CH21.
2
SG: 1 mV
(CH21)
MOD OFF
L502
Connect the digital voltmeter to the test point (Discriminator).
Adjust for 1.1 V DC at CH21.
3
SG: 1 mV
(CH21)
1 kHz
±
3 kHz dev.
RT501
Connect the VTVM to the speaker terminal.
Adjust for 115 mV on the VTVM (SP. OUT) at CH21.
4
SG: 158
µ
V
(CH16)
1 kHz
±
3 kHz dev.
L510
Press the “CH” twice to change the channel to CH16.
Adjust for maximum SINAD on the SINAD METER at CH16.
5
SG: 3
µ
V
(CH16)
1 kHz
±
3 kHz dev.
L510
Adjust for maximum SINAD on the SINAD meter at CH16.
6
SG: 1
µ
V
(CH16)
1 kHz
±
3 kHz dev.
L510
Adjust for maximum SINAD on the SINAD meter at CH16.
-
+
SG
Handset Unit
VTVM
MOD = 1KHz
DEV = ±3kHz
DC Power Supply
3.6V
RF Test
Point
SP
Terminal
Batt Terminal
Dummy Load
(150-ohm)
Digital Voltmeter
RX VCO /
Discriminator
Test Point
SP Terminal
across Dummy Load
SINAD
Meter
RT501
L510
J502
L505
Battery
Terminal
L504
L502
J501
RX VCO
Test Point
Discriminator
Test Point
RF
Test Point
SP
Terminal
Содержание FT-7807R
Страница 1: ...CORDLESS TELEPHONE SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FT 7807R FILE NO 2B0 9803 ...
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Страница 10: ... 9 10 SCHEMATIC DIAGRAMS TEST POINT RF TEST POINT RX VCO TEST POINT TX VCO TEST POINT Discriminator ...
Страница 11: ... 11 12 TEST POINT RF TEST POINT RX VCO TEST POINT Discriminator TEST POINT TX VCO ...
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Страница 29: ... 30 EXPLODED VIEW AND MECHANICAL PARTS LIST Base Unit ...
Страница 31: ... 32 Handset ...
Страница 52: ...MECHANICAL PARTS LIST ...