SHARP 70FW57E
Service Manual

70FW-57E

DESCRIPTION OF SCHEMATIC DIAGRAM
SAFETY NOTE: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS. 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING. IMPOTANT SAFETY NOTE: PARTS MARKED WITH « »( ) ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY AND PERFORMANCE OF THE SET. SERVICE PRECAUTION: THE AREA ENCLOSED BY THIS LINE ( ) IS DIRECTLY CONNECTED WITH AC MAINS VOLTAGE. WHEN SERVICING THE AREA, CONNECT AN ISOLATING TRANSFORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE HAZARD OF ELECTRIC SHOCK. WAVEFORM MEASUREMENT CONDITION: Colour bar genetator signal of 70 dB from RF input.
1 2 3 4

81FW-57E

NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 ohms. M= Megaohm). 2. All resistors are 1/8 watt. unless otherwise noted. 3. All capacitors are µF, unless otherwise noted (P= µµF). 4. The capacitor with Part No. RC-FZ9XXXBMNJ is designed to with stand 63V.

CAUTION This circuit diagram is original one, therefore there may be light difference from yours.

GND GND GND

GND

580V
5 6

1.3 KV 31.25 KHz
7

4 Vp-p 31.25 KHz
8

350 Vp-p

100Hz

GND

41 Vp-p 31.25 KHz
9 10

1.8 Vp-p

100Hz
11

3.3V 100Hz
12

45 Vp-p 113 KHz FM

GND

19V 100Hz
13

25 Vp-p 100Hz

1.15 Vp-p 31.25KHz

400Hz

400Hz

15