— 8 —
Receiver Section
Connection
Alignment Procedure
Step
Preset to
Adjustment
Remarks
1
SG: 1 mV
No modulation
L512
(Discriminator
Voltage)
Connect the RF Signal Generator to the RF test point on the handset RF
PCB. Make sure that the frequency is 926.994344 MHz.
Connect the DC Voltmeter to the J601 AF test point. Adjust L512 to
indicate DC 0.95 V.
2
SG: 1 mV
1 kHz
±
8 kHz
deviation
VR602
(RX AF
Output)
Connect the RF Signal Generator to the RF test point on the handset RF
PCB. Make sure that the frequency is 926.994344 MHz.
Connect the AC Voltmeter across a 150-ohm dummy to the SP
Connector. Adjust VR602 for a 60 mV reading on the AC Voltmeter.
3
SG:
−
7 dB
µ
V
1 kHz
±
8 kHz
deviation
VR501
(SQ Point)
Press the “5” key to enter the TEST Mode 5. Make sure that the
frequency of RF SG output is 926.994344 MHz. Adjust VR501 to turn to
the point where the bell rings.
Alignment Point Location on Handset Main PCB and Handset RF PCB
Preset
Place the Handset in RX SENS mode (step 4) in accordance with the procedure on page 4.
RF SG
−
+
RF
Test Point
HANDSET RF PCB
J602
SP
Connector
HANDSET MAIN PCB
−
+
Dummy Load
(150-ohm)
AC Voltmeter
J601
AF Terminal
DC Voltmeter
Battery
Terminals
DC Power Supply
DC 3.8V
RF PCB
AF TEST POINT
RF TEST POINT
J502
VR501
L512
J501
Handset Main PCB
Battery Terminals
−
+
VR602
J602
SP
Connector
Содержание FT-8508
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9804 FT 8508 CORDLESS TELEPHONE ...
Страница 3: ... 2 OPERATING CONTROLS BASE UNIT CONTROLS HANDSET CONTROLS RS YZ 1 2 ...
Страница 10: ...Handset Main 9 BLOCK DIAGRAMS ...
Страница 11: ...Handset RF 10 ...
Страница 12: ...Base RF 11 ...
Страница 13: ...Base Main 12 13 ...
Страница 14: ...SCHEMATIC DIAGRAMS Base Main 14 15 ...
Страница 15: ...Base RF 16 17 ...
Страница 16: ...Base Key 18 19 ...
Страница 17: ...Handset Main 20 21 ...
Страница 18: ...Handset RF 22 23 ...
Страница 36: ...Base Main 41 ELECTRICAL PARTS LOCATION ...
Страница 37: ...Base RF 42 ...
Страница 38: ...Base Key 43 ...
Страница 39: ...Handset Main 44 ...
Страница 40: ...Handset RF 45 ...
Страница 41: ...Base 46 WIRING DIAGRAMS ...
Страница 42: ...Handset 47 W501 W 072147 J502 JK 736 9P J601 IC603 PORTABLE RF B501 PE1294DA TOP VIEW SOLDERING ...
Страница 71: ...MECHANICAL PARTS LIST ...