Sanyo AVM-2550S Training Manual page 3

This technical publication familiarizes service technicians with the C-003 CPU
circuits, the new BUS Controlled Signal Processor, the new MTS Processor,
the new PIP Signal Processor, the new Comb Filter and the new Switching
Power Supply circuits employed in type VB7C color television chassis. The
C-003 CPU is used on all models using the VB7C chassis, which includes the
AVM-2550S, AVM-2580G, AVM-2759S (Chassis No. G5G-2759S2), AVM-
2760S, AVM-2780G, AVM-3259G (Chassis No. G5R-3259G2/3/4), AVM-
3260G, AVM-3259S (Chassis No. G5R-3259S1), AVM-3280G, AVM-3650G,
AVM-3680G, PC-25S00, PC-27S90 (Chassis No. G5G-27S901/2), PC-32S90
(Chassis No. G5R-32S901/2) and PC-36S00. The descriptions given in this
manual for the circuit operations use model AVM-2780G for the schematic
nomenclature. Circuit operations for all VB7C chassis will be the same,
however, schematic nomenclature may vary with the model.
Note: This publication should be used only as a training aid. Refer to the
specific service data for information about parts, CPU programming,
safety and alignment procedures.
FOREWORD
Safety Information:
All product safety requirements and testing must be completed prior to
returning the television to the consumer. Do not defeat safety features or
fail to perform safety checks.
procedures may result in damage or personal injury.
Integrated circuits and many other semiconductors are electrostatically
sensitive. Special handling techniques are required when handling these
components.
Many electrical and mechanical parts have special safety related
characteristics, some of which are often not evident from visual inspection,
nor can the protection they give necessarily be obtained by replacing the parts
with components rated for higher voltage, wattage, etc. Such parts are often
identified in the service literature.
shading or a on the schematic and/or parts list. Always be on the alert for
any special product safety notices, special parts identification etc. Use of a
substitute part that does not have the same safety characteristics can create
shock, fire, and/or other hazards. Use the part recommended in the service
literature.
– i –
Failure to comply with these safety
A common means of identification is