Sharp 25R-M100 User manual

1
25R-M100
COLOR TELEVISION
Chassis No. SN-010
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
S21O525R-M100
»ELECTRICAL SPECIFICATIONS .........................................................................................................1
»IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
»LOCATION OF USER'S CONTROL .....................................................................................................4
»INSTALLATION AND SERVICE INSTRUCTIONS................................................................................5
»CHASSIS LAYOUT .............................................................................................................................11
»BLOCK DIAGRAM ..............................................................................................................................12
»SCHEMATIC DIAGRAMS...................................................................................................................13
»PRINTED WIRING BOARD ASSEMBLIES ........................................................................................17
»REPLACEMENT PARTS LIST............................................................................................................22
»PACKING OF THE SET......................................................................................................................29
Page
SHARP CORPORATION
CONTENTS
SERVICE MANUAL
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
MODEL
POWER INPUT.................................................... 120 V AC 60 Hz
POWER RATING ................................................................... 95 W
PICTURE SIZE ........................................... 2,032cm2(315sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
(Nominal)
AUDIO POWER
OUTPUT RATING ................................ 1.5W (at 10% distortion)
ELECTRICAL SPECIFICATIONS
SPEAKER
SIZE ...................................................................... 8 cm (Round)
VOICE COIL IMPEDANCE ............................ 32 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF.....................................................75 ohm Unbalanced
TUNING RANGES
VHF-Channels...............................................................2 thru 13
UHF-Channels ............................................................14 thru 69
CATV Channels...........................................................1 thru 125
(EIA, Channel Plan U.S.A.)
Specifications are subject to change without
prior notice.
25R-M100

11
654321
A
B
C
D
E
F
G
H
25R-M100
CHASSIS LAYOUT

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654321
A
B
C
D
E
F
G
H
25R-M100
BLOCK DIAGRAM

13
25R-M100
DESCRIPTION OF SCHEMATIC DIAGRAM
NOTES:
1. The unit of resistance "ohm" is omitted.
(K=k Ω =1000 Ω ,M=M Ω )
2. All resistors are 1/10 watt, unless otherwise noted.
3. All capacitors are µ F, unless otherwise noted.
(P=pF=µµF)
4. (G) indicates ±2% tolerance may be used.
5. indicates line isolated ground.
VOLTAGE MEASUREMENT CONDITIONS:
1. All DC voltages are measured with DVM connected
between points indicated and chassis ground, line
voltagesetat 120VAC andallcontrols setfor normal
picture unless otherwise indicated.
2. All voltages measured with 1000µ V B & W or Color
signal.
WAVEFORM MEASUREMENT CONDITIONS:
1. Photographs taken on a standard gated color bar
signal, the tint setting adjusted for proper color. The
wave shapes at the red, green and blue cathodes of
the picture tube depend on the tint, color level and
picture control.
2. indicates waveform check points (See chart,
waveforms are measured from point indicated to
chassis ground.)
å AND SHADED ( ) COMPONENTS
= SAFETY RELATED PARTS.
' MARK= X-RAY RELATED PARTS.
This circuit diagram is a standard one, printed circuits
may be subject to change for product improvement
without prior notice.
WAVEFORMS

1514
25R-M100
121110987654321
A
B
C
D
E
F
G
H
SCHEMATIC DIAGRAM: MAIN Unit

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654321
A
B
C
D
E
F
G
H
25R-M100
SCHEMATIC DIAGRAM: CRT and FRONT A/V Unit