Sanyo CP29ST2 User manual

IFILE NO. I
SERVICE MANUAL Colour Television
Specifications
Power Source ........
Co[our System .......
Television System .....
—. Channel Coverage . . . .
VideolF ............
SoundlF ...........
Aerial Input Impedance
Ext. Terminals
.AC220-240V, 50 Hz.
.PAL (NTSC4.43, NTSC in AV mode)
.B/G
.VHF: O-11, 5A (Australia), 1-11 (New Zealand)
UHF:28-59 (Australia), 21-69 (New Zealand)
CATV S1-S41, X, Y, Z, Z+l, Z+2
.38.9MHz
.33.4 MHZ
.75Q
Video inputs: Phono jack x2(1 Vp -p, 75Q)
Audio inputs: Phono jack (R/L) x2(436mVrms, more than 40KQ)
Video monitor outputs: Phono jack x1(1Vp -p, 75$2)
Audio monitor outputs: Phono jack(R/L) x 1(436mVrms, less than 600Q)
Sound Output(RMS) ...Front speakers: 7.5W +7.5W
(CP29ST2CP29ST2T)
Dimensions ..........763(W) x590(H) x498(D)mm
Weight ..............approx.36 Kg
(CP25ST2)
Dimensions ..........691 (W) x528(H) x448(D)mm
Weight ..............approx.27.6 Kg
Specifications subject to change without notice.
F2DZIF2DYIF2EY
Model No. CP29ST2
CP29ST2T
CP25ST2
Australia, New Zealand
Service Ref. No. CP29ST2-UO
CP29ST2T~
CP25ST240
Product Code: 111338819 (CP29ST2)
111338818 (CP29ST2T)
111338718 (CP25ST2)
Original Version
Chassis Series: AC2-A
~
Give complete “SERVICE REF. NO.” for parts
order or servicing. It is shown on the rating plate
This T.V. receiver will not work properly in
foreign countries where the television
transmission system and power source dif-
fer from the design specifications. Refer to
the specification table.
REFERENCE NO. SM520264

Contents
Safety Notice ................................................’........................2
Chassis Block Diagram ..............................................................3-4
lC Block Diagrams ..................................................................5-7
Protection Circuit .....................................................................8
Service Adjustments Location.. .........................................................9
Service Adjustments with replacing Memory lC(lC802) ....................................10-12
Service Mode Adjustments ..........................................................13-14
Special Functions .................................................................15-18
Purity and Convergence Adjustment .....................................................19
Cabinet Parts List ...................................................................20
Chassis Electrical Parts List.... .........................................(CP29ST2-00) 21-30
(CP29ST2T-00) 31-41
(CP25ST2-00) 41-50
Safety Notice
SAFETY PRECAUTIONS
l: An isolation transformer should reconnected inthe 3: When replacing achassis in thecabinet, alwaysbe
power line between the receiver and the AC line certain that all the protective devices are installed
when aservice is performed on the primary of the properly, such as, control knobs, adjustment covers
converter transformer ofthe set. or shields, barriers, isolation resistor-capacitor net-
works etc.. Before returning any television to the
2: Comply with all caution and safety-related notes pro- customer, the service technician must be sure that
videdon the cabinet back, inside the cabinet, on the it is completely safe to operate without danger of
chassis orthe picture tube. electrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-
structedtoiimit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube mustbe
thesametypeas the original including suffix letter. Excessive high voltage may produce potentially hazardous
-RADIATION.TO avoid such hazards, the high voltage must be maintained within specified iimit. Refer tothisser-
vice manual, high voltage adjustment for specific high voltage limit. lf high voltage exceeds specified limits, take
necessary corrective action.Carefully follow the instructions for+Bl voltpowersupply adjustment, and high volt-
age checkto maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE
Product safety should be considered when acomponent replacement is made in any area of areceiver.
Components indicated by mark ~in the parts list and the schematic diagram designate components in which
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 ~.No deviations from resistance
wattage or voltage ratings may be made for replacement items designated by mark ~.
-
-2-

Chassis Block Diagrams
Following diagrams show the fundamental block diagrams for AC2 chassis and therefore differ slightly from actu-
al diagram of each TV set.
MAIN SIGNAL PROCESSING CIRCUIT
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SYSTEM CONTROL
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IC Block Diagrams
QXXAVB241 <lF/Video/Chroma/Def. >
EXITAUDI(
IN
GND .
VIF
SIF
Vcc
Vcc
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42
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HOUTPUT
MUTE
— OUT
—
—
— B-YIN
— R-YIN
_ DEFLECTION
GND
—:WJOMA
— y$o
—
—EXTIN
—WIN
.,, ,,.
IFAGCOUT AFT
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