Read Sharp 37GQ-20 (serv.man6) Service Manual online
13
37GQ-20H
WAVEFORM MEASUREMENT CONDITION:
Colour bar genetator signal of 70 dB from RF input.
Colour bar genetator signal of 70 dB from RF input.
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
ohms. M= Megaohm).
2. All resistors are 1/8 watt. unless otherwise noted.
3. All capacitors are
µ
F, unless otherwise noted (P=
µµ
F).
4. The capacitor with Part No. RC-FZ9XXXBMNJ is
designed to with stand 63V.
designed to with stand 63V.
NOTE:
SERVICE PRECAUTION:
DESCRIPTION OF SCHEMATIC DIAGRAM
SAFETY NOTE:
1. DISCONNECT THE AC PLUG FROM THE AC
OUTLET BEFORE REPLACING PARTS.
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.
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 PERFORMAN-
CE OF THE SET.
OF THE SET. BE SURE TO REPLACE THESE
PARTS WITH SPECIFIED ONES FOR
MAINTAINING THE SAFETY AND PERFORMAN-
CE OF THE SET.
!
CAUTION
This circuit diagram is original one,
therefore there may be light difference from
yours.
This circuit diagram is original one,
therefore there may be light difference from
yours.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CH1 100V A 2
µ
s 200V VERT
CH1 FREQ = 100KHz
CH1 P-P = 504 V
CH1 P-P = 504 V
CH1 100V A 2
µ
s 100V VERT
CH1 FREQ = 100KHz
CH1 P-P = 472 V
CH1 P-P = 472 V
CH1 2V A 10
µ
s -1.00V VERT
CH1 FREQ = 15.6KHz
CH1 P-P = 8.56 V
CH1 P-P = 8.56 V
CH1 200V A 10
µ
s 200V VERT
CH1 FREQ = 15.6KHz
CH1 P-P = 1.00 kV
CH1 P-P = 1.00 kV
CH1 1V A 10
µ
s 1.00V VERT
CH1 FREQ = 15.6KHz
CH1 P-P = 5.40 V
CH1 P-P = 5.40 V
CH1 1V A 5ms 2.50 V VERT
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.
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.
CH1 FREQ = 50.0 Hz
CH1 P-P = 4.80 V
CH1 P-P = 4.80 V
CH1 500mV A 5ms 1.00V VERT
CH1 FREQ = 50.0 Hz
CH1 P-P = 1.48 V
CH1 P-P = 1.48 V
CH1 500mV A 5ms -500mV VERT
CH1 FREQ = 50.0 Hz
CH1 P-P = 1.94 V
CH1 P-P = 1.94 V
CH1 10V A 5ms -10.0mV VERT
CH1 FREQ = 50.0 Hz
CH1 P-P = 38.4 V
CH1 P-P = 38.4 V
CH1 1V A 5ms 2.50 V VERT
CH1 FREQ = 1.00 KHz
CH1 P-P = 4.44 V
CH1 P-P = 4.44 V
CH1 5V A 500
µ
s 0.0 V VERT
CH1 FREQ = 412 Hz
CH1 P-P = 16.8 V
CH1 P-P = 16.8 V
CH1 500mV A 10
µ
s TVFLD 25
CH1 FREQ = 15.6 KHz
CH1 P-P = 1.84 V
CH1 P-P = 1.84 V
CH1 20V A 10
µ
s 150 V VERT
CH1 FREQ = 15.6 KHz
CH1 P-P = 74.4 V
CH1 P-P = 74.4 V
CH1 20V A 10
µ
s 150 V VERT
CH1 FREQ = 15.6 KHz
CH1 P-P = 72.8 V
CH1 P-P = 72.8 V
CH1 FREQ = 15.6 KHz
CH1 P-P = 70.4 V
CH1 P-P = 70.4 V
CH1 20V A 10
µ
s 150 V VERT
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
gnd
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