— 1 —
CONTENTS
SAFETY PRECAUTIONS ................................................................................................................... 1
OPERATING CONTROLS .................................................................................................................. 2
ALIGNMENT PROCEDURE ............................................................................................................... 3
BLOCK DIAGRAMS ........................................................................................................................... 9
SCHEMATIC DIAGRAMS ................................................................................................................ 14
TROUBLESHOOTING HINTS .......................................................................................................... 24
IC AND TRANSISTOR VOLTAGE CHART ....................................................................................... 31
SEMICONDUCTOR LEAD IDENTIFICATION .................................................................................. 36
ELECTRICAL PARTS LOCATION .................................................................................................... 41
WIRING DIAGRAMS ........................................................................................................................ 46
EXPLODED VIEW AND MECHANICAL PARTS LIST ...................................................................... 48
PARTS LIST ..................................................................................................................................... 52
ASSEMBLY PARTS LIST ................................................................................................................. 71
SPECIFICATIONS ............................................................................................................................ 72
SAFETY PRECAUTIONS
Before returning any models to the customer, a safety check of the entire instrument should be made.
The service technician must be sure that no protective device built into the instrument by the manufacturer
has become defective or inadvertently degraded during servicing.
1. WARNING:
Alterations of the design or circuitry of these models should not be made.
Any design changes or additions such as, but not limited to, circuit modifications, auxiliary speaker
jacks, switches, grounding, active or passive circuitry, etc. may alter the safety characteristics of these
models and potentially create a hazardous situation for the user.
Any design alterations or additions will void the manufacturer’s warranty and will further relieve the
manufacturer of responsibility for personal injury or property damage resulting therefrom.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special characteristics. These characteristics
often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts that have these
special safety characteristics are identified in this manual and its supplements; electrical components
having such features are identified by a in the schematic diagram and the parts list. Before replacing
any of these components, read the parts list in this manual carefully. The use of substitute replacement
parts that do not have the same safety characteristics as specified in the parts list may create shock, fire
or other hazards.
Summary of Contents for FT-8508
Page 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9804 FT 8508 CORDLESS TELEPHONE ...
Page 3: ... 2 OPERATING CONTROLS BASE UNIT CONTROLS HANDSET CONTROLS RS YZ 1 2 ...
Page 10: ...Handset Main 9 BLOCK DIAGRAMS ...
Page 11: ...Handset RF 10 ...
Page 12: ...Base RF 11 ...
Page 13: ...Base Main 12 13 ...
Page 14: ...SCHEMATIC DIAGRAMS Base Main 14 15 ...
Page 15: ...Base RF 16 17 ...
Page 16: ...Base Key 18 19 ...
Page 17: ...Handset Main 20 21 ...
Page 18: ...Handset RF 22 23 ...
Page 36: ...Base Main 41 ELECTRICAL PARTS LOCATION ...
Page 37: ...Base RF 42 ...
Page 38: ...Base Key 43 ...
Page 39: ...Handset Main 44 ...
Page 40: ...Handset RF 45 ...
Page 41: ...Base 46 WIRING DIAGRAMS ...
Page 71: ...MECHANICAL PARTS LIST ...
