Sharp CDXC-6850 Service manual

CDX-C6850
SERVICE MANUAL
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (US Model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION 17 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 1% total harmonic distortion.
US Model
Canadian Model
Model Name Using Similar Mechanism CDX-C5750/C5850 CD Drive Mechanism Type MG-363T-121 Optical Pick-up Name KSS-521A
Other Specifications CD player section
System Compact disc digital audio
Signal-to-noise ratio 90 dB Frequency response 10 – 20,000 Hz Wow and flutter Below measurable limit Laser Diode Properties
Material GaAlAs Wavelength 780 nm Emission Duration Continuous Laser output power Less than 44.6 µW*
* This output is the value measured at a distance
of 200 mm from the objective lens surface on the Optical Pick-up Block.
Tuner section
FM
Tuning range 87.5 – 107.9 MHz Antenna terminal External antenna connector Intermediate frequency 10.7 MHz Usable sensitivity 10 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 65 dB (stereo),
Harmonic distortion at 1 kHz
Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz
AM
Tuning range 530 – 1,710 kHz Antenna terminal External antenna connector Intermediate frequency 10.71 MHz/450 kHz Sensitivity 30 µV
system
68 dB (mono)
0.7% (stereo),
0.5% (mono)
Power amplifier section
Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 4 – 8 ohms Maximum power output 40 W × 4 (at 4 ohms)
General
Outputs Line outputs (2)
Power antenna relay control lead Power amplifier control lead Telephone ATT control lead
Tone controls Bass ±8 dB at 100 Hz
Treble ±8 dB at 10 kHz
Power requirements 12 V DC car battery
(negative ground)
Dimensions Approx. 178 × 50 × 185 mm
(7 1/8 × 2 × 7 3/8 in.) (w/h/d)
Mounting dimensions Approx. 182 × 53 × 162 mm
(7 1/4 × 2 1/8 × 6 1/2 in.)
(w/h/d) Mass Approx. 1.2 kg (2 lb. 10 oz.) Supplied accessories Parts for installation and
connections (1 set)
Front panel case (1)
Design and specifications are subject to change without notice.
MICROFILM
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SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
• IC801 MB90574PFV-G-179-BND (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 LD ON O Laser ON/OFF control output 2 FOK I Focus OK signal detection input 3 XLAT25 O CD signal processing latch output 4 DATA25 O CD signal serial data output 5 XRST O Reset output to CD signal processor IC. 6 GFS I GFS signal detection input 7 NIL Not used. (Connect to ground in this set.) 8 VCC Power supply pin (+5 V)
9 – 11 NIL Not used. (Open)
12 FLS SI/NOSE1 I Front panel attachment detection input 13 LCD SO/FLS SO O LCD serial data output 14 LCD CKO O LCD serial clock output 15 BEEP O BEEP output 16 NIL Not used. (Open) 17 SQ SI I Sub Q data input 18 NIL Not used. (Connect to ground in this set.) 19 SQ CKO O Sub Q read clock output 20 UNI SI I BUS system serial interface input 21 UNI SO O BUS system serial interface output 22 UNI CK I/O BUS system serial clock input/output 23 C IN I Track jump No. count input 24 SIRCS I Remote commander input 25 TXT SI I CD-TEXT data input 26 NIL Not used. (Connect to ground in this set.) 27 TXT CKO O CD-TEXT data read clock output 28 CLOK25 O CD signal processing serial clock output 29 SYSRST O System reset output 30 DEEMPH O De-emphasis output 31 AMP ATT O Power amplifier attenuator control output 32 MD ON O CD mechanism power control output 33 VSS Ground 34 C Power stabilization capacitor pin 35 CD ON O CD power control output 36 BUS ON O BUS ON control output 37 AD ON O Power control output of A/D conversion. 38 DVCC VREF input of D/A converter. 39 DVSS Ground of D/A converter. 40 NIL Not used. (Open) 41 ANGLE O LCD view angle alignment output (Not used in this set.) 42 AVCC Analog power supply pin (+5 V) 43 AVRH VREF + input of A/D converter. 44 AVRL VREF – input of A/D converter. 45 AVSS Analog ground
46 – 48 KEY IN0 – 2 I Key input 0 – 2
49 RC IN0 I Rotary commander input 0 50 QUALITY I Not used in this set. 51 NIL Not used. (Connect to ground in this set.) 52 MPDH I Tuner multi path input (Not used in this set.) 53 S-METER I S-meter voltage detection input 54 VCC Power supply pin (+5 V) 55 NS MASK O Not used in this set.
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Pin No. Pin Name I/O Pin Description
56 AMP ON O Power amplifier power control output 57 TXT ON O Reset output to CD-TEXT decoder IC. 58 VOL ATT O Electric volume mute control output 59 NIL Not used. (Open) 60 ATT O System attenuate control output 61 RC IN1 I Rotary commander shift key input 1 62 TU ATT O Tuner attenuate output (Not used in this set.) 63 VSS Ground 64 NIL Not used. (Open) 65 SSTOP I IF counter result signal detection input of PLL. 66 TEST I Test mode initial setting detection input 67 DAVN I RDS IC data acquisition detection input (Fixed at “L” in this set.) 68 FM ON/AM ON O FM ON output 69 TU ON O Tuner power control output 70 SDA I/O I2C BUS serial data input/output 71 SCL O I2C BUS serial clock output 72 NOSE2 I Front panel OPEN detection input (Not used in this set.) 73 X1A O Sub ceramic oscillator output (32 kHz) 74 X0A I Sub ceramic oscillator input (32 kHz) 75 SCOR I SCOR signal detection input 76 BU IN I Backup power detection input 77 DQSY I CD-TEXT data setting completion signal detection input 78 CD SENS I CD SENS signal detection input 79 KEY ACK I Key input acknowledge 80 TEL ATT I Telephone attenuate detection input 81 ST/MONO I/O Tuner stereo signal detection input/forced monaural output 82 SEEKOUT O SEEK output 83 SD IN I Signal detector input 84 WIDE O WIDE/NARROW select output (Not used in this set.) 85 NARROW O WIDE/NARROW select output (Not used in this set.) 86 HSTX Hardware standby input (Connect to pin (RESET).) 87 MD2 Operation mode input (Connect to ground in this set.)
88, 89 MD1, 0 Operation mode input (Connect to VCC in this set.)
90 RESET I Reset input 91 VSS Ground 92 X0 I Main ceramic oscillator input (4.19 MHz) 93 X1 O Main ceramic oscillator output (4.19 MHz) 94 VCC Power supply pin (+5 V) 95 COM8V ON O COM 8V control output 96 NIL Not used. (Open) 97 AREA1 I Destination select input 1 (Fixed at “L” in this set.) 98 AREA2 I Destination select input 2 (Fixed at “L” in this set.)
99 AREA3 I Destination select input 3 (Fixed at “H” in this set.) 100 BAND I Not used in this set. 101 ACC IN I Accessory power detection input
102, 103 PH3, 2 I Disc insertion detection photo sensor input (Not used in this set.)
104 LCD CE O LCD chip enable output 105 FLS W I Flash write input (Fixed at “H” in this set.)
106, 107 RE IN0, 1 I Rotary encoder input
108 ILL ON O Illumination power control output 109 PW ON O System power control output 110 NIL Not used. (Open) 111 ANT REM O ANT REMOTE power control output
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Pin No. Pin Name I/O Pin Description
112, 113 NIL Not used. (Open)
114 CD LD O Loading motor control output (Loading direction) 115 CD EJ O Loading motor control output (Eject direction) 116 L SW I Sled limit switch detection input 117 IN SW/(PH1) I Disc insertion detection input 118 D SW I DOWN switch detection input 119 VSS Ground 120 SELF SW/(IN SW) I Disc self store detection input
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