XL-HP737 (serv.man4) - Sharp Audio Service Manual (repair manual). Page 2

XL-HP737

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Audio

XL-HP737

Service Manual

XLHP737

Market

E

 

(Fire & Shock Hazard)

Before returning the audio product to the user, perform the following
safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or

that hardware is not lodged between the chassis and other metal 
parts in the audio product.

2. Inspect all protective devices such as insulating materials, cabinet,

terminal board, adjustment and compartment covers or shields, 
mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage current in

the following manner.

*

Plug the AC line cord directly into a 120 volt AC outlet.

*

Using two clip leads, connect a 1.5k ohm, 10 watt resistor paral-
leled by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as conduit or electrical
ground connected to earth ground.

*

Use a VTVM or VOM with 1000 ohm per volt, or higher, sensitivity
to measure the AC voltage drop across the resistor (See diagram).

*

Connect the resistor connection to all exposed metal parts having a
return path to the chassis (antenna, metal cabinet, screw heads,
knobs and control shafts, escutcheon, etc.) and measure the AC 
voltage drop across the resistor.

All check must be repeated with the AC line cord plug connection
reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.) or
more is excessive and indicates a potential shock hazard which must
be corrected before returning the audio product to the owner.

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER 
TO THE OPERATION MANUAL.

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

TEST PROBE

0.15 µ F

1.5k ohms

10W

VTVM

AC SCALE

Specifications for this model are subject to change without 
prior notice.

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AC 120 V, 60 Hz

92 W

Width: 7-1/4" (185 mm)
Height: 10-1/4" (260 mm)
Depth: 12" (307 mm)

14.5 lbs. (6.6 kg)

100 watts minimum RMS per channel into 6
ohms from 100 Hz to 20 kHz, 10% total har-
monic distortion

Speakers: 6 ohms

Headphones: 16 - 50 ohms
(recommended: 32 ohms)

Subwoofer pre-out (audio signal):
200 mV/10 k ohms at 70 Hz

Video/Auxiliary (audio signal):
500 mV/47 k ohms

5-disc multi-play compact disc player

Non-contact, 3-beam semiconductor laser
pickup

1-bit D/A converter

20 - 20,000 Hz

90 dB (1 kHz)

FM: 87.5 - 108.0 MHz

AM: 530 - 1,720 kHz

50 - 14,000 Hz (normal tape)

50 dB (recording/playback)

0.3 % (WRMS)

2-way type speaker system

2" (5 cm) tweeter

5-7/8" (15 cm) woofer

200 W

100 W

6 ohms

Width: 7-1/8" (180 mm)
Height: 10-1/4" (261 mm)
Depth: 10-3/16" (259 mm)

6.8 lbs. (3.1 kg)/each