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SHARP
SERVICE MANUAL
S90M621 N52E11
21 SYSTEM COLOUR TELEVISION Chassis No. 2IA- M
MODEL
21N52-E1
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.
ELECTRICAL SPECIFICATIONS
110-240VAC 50/60Hz (Auto) Power Consumption ................................. 107w Convergence .................. Self Converging System Focus ...... Bi-Potential, Uni-Potential Electrostatic Sweep Deflection ................................ Magnetic Intermediate Frequencies Picture IF Carrier ................................ 38.9M Hz Sound IF Carrier 6.5MHz ......................................... 32.4MHz 6.0MHz ......................................... . 32.9MHz 5.5MHz ......................................... . 33.4MHz 4.5MHz ......................................... . 34.4MHz Colour Sub-Carrier PAL/NTSC ..................................... 34.47M Hz 34.494/34.65MHz SECAM ............................ NTSC ............................................ 35.32MHz Audio Power Output Rating ........ 2.5W x 2 (Max.) Speaker Size ............................. . 8cm x 4cm Oval x 2 pcs Voice Coil Impedance ............. 8 ohms at 400 Hz Power Input ................................ Aerial Input Impedance ,......, 75 ohm Unbalanced Receiving Channels PAL-B/G, SECAM-B/G VHF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. E2 thru E l 2 UHF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 thru 69 CATV .......................,............... S1 thru S3, M1 thru M10 U1 thru U10 PAL-D/K, SECAM-D/K VHF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R1 thru R12 UHF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 thru 69 PAL-l B thru J VHF . . . . . . . . . . . . . . . . . . . . . (IRELAND): UHF .................. (U.K., H.K.): 21 thru 69 NTSC-M VHF . . . . . . . . . . . . . . . . . . . . . . . . . . . (US): 2 thru 13 (JAPAN): 1 thru 12 UHF . . . . . . . . . . . . . . . . . . . . . . . . . . . (US): 14 thru 83 (JAPAN): 13 thru 62 CATV .................................... A-6 thru A-1, A thru W, AA Receiving Frequency VHF . . . . . . . . . . . . . . . . . . . . . . . . . 48.25 thru 301.25 MHz UHF . . . . . . . . . . . . . . . . . . . . . . . . . 471.25 thru 885.25 MHz
Specifications are subject to change without prior notice.
WARNING
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user - serviceable parts inside. Refer servicing to qualified service personnel.
SHARP CORPORATION
SCHEMATIC DIAGRAM:
SUB CIRCUIT
29
I CAUTION:
This circuit diagram is original one, therefore there may be a slight difference from yours.
I
30
SCHEMATIC DIAGRAM:
MAIN CIRCUIT
I CAUTION:
This circuit diagram is original one, therefore there may be a slight difference from yours.
I
I
7
I
8
9
1
10
I
11
I
12
I
32
BLOCK DIAGRAM:
MAIN CIRCUIT
1
1
2
I
3
4
I
5
I
6
3
3
1
7
8
9
I
10 34
11
I
12
I
BLOCK DIAGRAM:
SUB CIRCUIT
ADG-COIL ,---7
1
2
1
3
4
I
5
I
6
I
35
7
I
8
9
10
11
12
36