SD-SH111 (serv.man23) - Sharp Audio Service Manual (repair manual)

Page

IMPORTANT SERVICE NOTES ........................................................................................................................................  2
SPECIFICATIONS .............................................................................................................................................................  2
NAMES OF PARTS ...........................................................................................................................................................  3
OPERATION MANUAL ......................................................................................................................................................  6
QUICK GUIDE ...................................................................................................................................................................  9
DISASSEMBLY ................................................................................................................................................................  13
REMOVING AND REINSTALLING THE MAIN PARTS ...................................................................................................  15
WIRING PROCESS DIARGRAM .....................................................................................................................................  15
ADJUSTMENT .................................................................................................................................................................  16
DVD UNIT DOWNLOLD PROCEDURES ........................................................................................................................  27
DESCRIPTION OF AND HOW TO AVOID ERROR AND ABNORMALITY INDICATIONS ............................................  29
DESCRIPTION OF CIRCUIT FOR 1-BIT UNIT ...............................................................................................................  30
TO CHECK AND CANCEL PROTECT CIRCUIT DETECTION LINE ..............................................................................   31
WIRING  DIAGRAM .........................................................................................................................................................  32
BLOCK DIAGRAM ...........................................................................................................................................................  34
WIRING SIDE OF P.W.BOARD / SCHEMATIC DIAGRAM .............................................................................................  51
VOLTAGE ........................................................................................................................................................................  91
NOTES ON SCHEMATIC DIAGRAM ..............................................................................................................................  92
TYPES OF TRANSISTOR AND LED ...............................................................................................................................  92
WAVEFORMS OF 1-BIT CIRCUIT ..................................................................................................................................  93
WAVEFORMS OF DVD CIRCUIT ...................................................................................................................................  94
TROUBLESHOOTING .....................................................................................................................................................  95
FUNCTION TABLE OF IC ................................................................................................................................................  98
FL DISPLAY ...................................................................................................................................................................  108
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET

• In the interests of user-safety the set should be restored to its

original condition and only parts identical to those specified be
used.

– 2 –

AC 120 V, 60 Hz

66 W

Width: 17-3/4" (450 mm) 
Height: 6" (152 mm) 
Depth: 6" (152 mm)

10.8 lbs. (4.9 kg)

 

Front speakers, Center speaker, Surround speakers and 
Subwoofer: 4 ohms minimum

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

Monitor output: S-video/video

Subwoofer Pre Out: 10 kohms

Digital output: Optical

S-video output (AV 2): S-terminal

Video output (AV 2): RCA type

Audio output (AV 2): RCA type (L/R)

Audio input [AV 1 (TV)]: RCA type

S-video input (AV 2, 3): S-terminal

Video input (AV 2, 3): RCA type

Audio input (AV 2, 3): RCA type (L/R)

Digital input (AV 3): Optical

Component video output: RCA type

128fs 1-bit switching (Remarks: fs = 44.1 kHz)

22 watts minimum RMS per channel into 4 ohms from 20 
Hz to 20 kHz, 2 % total harmonic distortion

Front: 25 W + 25 W, Center: 25 W,

Surround: 25 W + 25 W (4 ohms at 1 kHz)

Subwoofer: 25 W (4 ohms at 100 Hz)

7th-order 

   (delta - sigma) modulation

NTSC

DVD (Region number 1, ALL), audio CD, CD-R, CD-RW

Horizontal resolution: 500 lines

S/N ratio: 60 dB

Frequency characteristics:

Linear PCM DVD: 4 Hz to 22 kHz (48 kHz sampling)/

4 Hz to 44 kHz (96 kHz sampling)

CD: 4 Hz to 20 kHz

S/N ratio: 96 dB 1 kHz (CD)

Dynamic range: 96 dB (Linear PCM DVD)

96 dB (CD)

Total harmonic distortion ratio: 0.006 % maximum

FM: 87.5 - 108 MHz

AM: 530 - 1,720 kHz

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

BEFORE RETURNING THE AUDIO PRODUCT
(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 1.5 kohm, 10 watt resistor

paralleled by a 0.15 

µ

F 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.

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

TEST PROBE

0.15 

µ

F

1.5 kohms

10 W

VTVM

AC SCALE

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

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(12)

(7)

(1) (2) (3)

(4)

(5) (6)

(1) Front Left Signal Indicator

(8) Left Front Speaker Indicator

(2) Center Signal Indicator

(9) Center Speaker Indicator

(3) Front Right Signal Indicator

(10) Right Front Speaker Indicator

(4) Low Frequency Effect Indicator

(11) Subwoofer Indicator

(5) Surround Left Signal Indicator

(12) Left Surround Speaker Indicator

(6) Surround Monaural Signal 

Indicator

(13) Right Surround Speaker Indicator

(7) Surround Right Signal Indicator

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