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
FM/AM COMPACT DISC PLAYER
– 1 –
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.
– 20 –
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 (º (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
– 21 –
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
– 22 –