Table Of Contents; Safety Notice - Sanyo CP21YS2 Service Manual

Contents
Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
CPU Port Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service Adjustment with Replacing Memory IC(IC801) . . . . . . . . . . . . 8-12
Service Mode Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14
Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Special Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Purity and Convergence Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 17-18
Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chassis Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-30
Component Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-32
Voltages and Waveforms Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-34

Safety Notice

1: An isolation transformer should be connected in the
power line between the receiver and the AC line
when a service is performed on the primary of the
converter transformer of the set.
2: Comply with all caution and safety-related notes pro-
vided on the cabinet back, inside the cabinet, on the
chassis or the picture tube.
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-
structed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must be
the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X
- RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this
service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits,
take necessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high
voltage check to maintain the high voltage within the specified limits.
Product safety should be considered when a component replacement is made in any area of a receiver.
Components indicated by mark
safety can be of special significance. It is particularly recommended that only parts designated on the parts list
in this manual be used for component replacement designated by mark
wattage or voltage ratings may be made for replacement items designated by mark
SAFETY PRECAUTIONS
3: When replacing a chassis in the cabinet, always be
X-RADIATION PRECAUTION
PRODUCT SAFETY NOTICE
in the parts list and the schematic diagram designate components in which
-2-
certain that all the protective devices are installed
properly, such as, control knobs, adjustment covers
or shields, barriers, isolation resistor-capacitor net-
works etc.. Before returning any television to the
customer, the service technician must be sure that
it is completely safe to operate without danger of
electrical shock.
. No deviations from resistance
.