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CDX-2500R
4-2. BLOCK DIAGRAM -- CD SECTION --
OPTICAL PICK-UP KSS-521A
RF AMP, SERVO CONTROL IC2 PD1 PD2 E F RF 0 31 CLK XLT DATA SENS FOK C. OUT 19 20 21 24 25 23
DIGITAL SIGNAL PROCESSOR IC1 14 RF 59 57 56 54 1 55 CLKO XLTO DATO SEIN FOK CNIN PCMD 21 BCK 22 LRCK 20 XTAI 34
D/A CONVERTER IC702 5 DIN 6 BCKIN 4 LRCIN 19 CLKO 1 XTI 20 XTO SYSTEM CONTROL IC801 (1/3) VOUTL 12 VOUTR 9 R-CH CD L-CH
I-V AMP
35 36 39 38
A
TUNER SECTION (Page 23)
1 FEO 2 FEI RV4 FOCUS GAIN PD 34 PD
X700 16.9344MHz
15 RSTB FE BIAS 37 RV1 FOCUS BIAS 50 XRST
MC/DM1 17
30 DEEMPH
XRST 22 LD POWER CONTROL Q1, 2 33 LD SL O 16 FE O 6 TA O 13
LD
GFS SENS SQSO SQCK DATA XLAT CLOK SCOR
27 49 46 47 51 52 53 43
5 6 78 17 19 4 3 28 75
XRST GFS CD SENS SQ SI SQ CKO DATA25 XLAT25 CLOK25 SCOR
FOCUS/TRACKING COIL DRIVE, MOTOR DRIVE IC3 CH2+ TRACKING CH2 CH1+ FOCUS CH1 CH3+ M902 (SLED) SW3 (LIMIT) SW1 (DISC IN) LEVEL SHIFT 19 CH1 IN 3 MDP SW4 (DOWN) SW2 (SELF) 116 L SW
16 15 18 17 13 14
LEVEL SHIFT
22
CH2 IN
117 IN SW
118 D SW
120 SELF SW
M
CH3
LEVEL SHIFT
24
CH3 IN
M901 (SPINDLE)
M
CH4+
12
LEVEL SHIFT
3 CTL2 5 6 7
CH4 IN
23 C IN 2 FOK 1 LD ON 114 CD LD 115 CD EJ
FWD REV
M903 (LOADING) 04
M
CH5+
10
LEVEL SHIFT
· Signal path : CD
22
22
CDX-2500R
4-3. BLOCK DIAGRAM -- TUNER SECTION --
(Page 22) CD SECTION
TUNER UNIT TU601 CNJ600 (ANTENNA)
ELECTRONIC VOLUME IC401 OUT FL 22 CD L-CH 12 CDL MUTE Q110
A
L 18 R 16 R-CH
1 ANT AM 2 ANT FM
1 FML OUT RL 20 28 27 26 24 25 SE3L SE3R MUTE SCL SDA D402 POWER AMP IC200 5 MUTE CONTROL Q401,402 X801 32kHz X800 3.68MHz 12 3 9 11 7 STBY MUTE MUTE Q111
AM DET 12 MUTE Q101
FM+B 8 TU+B 9 AM+B 10
FM8V TU8V AM8V 62 82 83 81
SYSTEM CONTROL IC801 (2/3)
CNP501 1 FL+ 9 2 10 FL RL+ RL
SEEK 11 SD 20 ST/MONO 22 S-METER 19
RV801
TU ATT SEEK OUT SD IN ST/MONO
ATT 60 X1A 73 X0A 74 X0 92 X1 93
53 S-METER FM RDS S-METER PLL IC601 58 VOL ATT
4 22 AMP ON 56 AMP ATT 31 SCL 12 SDA 13 71 SCL 70 SDA TEL ATT 80 TEST 66 SSTOP 16 65 SSTOP AMP+B ANT+B ACC RDS DECODER IC602 20 S METER 4 XO 5 XI 16 FM DET SDA 9 SCL 10 MPTH 2 DAVN 8 52 MPDH 67 DAVN FM ON/ 68 AM ON AM/FM POWER CONTROL Q610,612,615 TUNER POWER CONTROL Q603,609 +5V REG Q613 FM 8V AM 8V BATT F901 Q916 13 15 5 6 7 16 ATT TEST AMP REM ANT REM ACC BATT
VT 5 LCL/DX 4 FM/AM IF 21 VCO 6 X601 10.25MHz AM OSC 13 AM OSC Q614
28 5 14 15 24 25 9
LP OUT LCL/DX IF AM IF FM FM IN AM IN OSC IN
10 OSC OUT
X602 4.3MHz FM DET 23 AMP Q618
TU ON 69
FM8V RDS POWER CONTROL Q604,605
5
NOISE FILTER IC603
1 NOISE CONTROL Q804
50 QUALITY 55 NS MASK
+8V
TU 5V TU 8V
· Signal path : CD : FM : MW
TU5V 04
RDS5V
23
23
CDX-2500R
4-4. BLOCK DIAGRAM -- DISPLAY SECTION --
SYSTEM CONTROL IC801 (3/3) RESET IC902
LCD DRIVE IC501
BU5V
2
1 S900 RESET
90 RESET LCD
SO 13 CKO 14 CE 104
64 DATA LCD 63 CLK 62 CE
LCD501
D910 BATT
BACK-UP CHECK Q906
D807 BATT
BACK-UP CHECK Q917,918
76 BU IN PL501,502
LED501-505, LSW511-529 D909 ACC D940 BATT BATT CHECK Q940 +8V REG Q904 POWER CONTROL Q913,919 ACC CHECK Q905 LCD POWER CONTROL Q901,902 +10V REG Q903
101 ACC IN ILL ON 108 95 COM8V ON KEY IN0 46
BATT
D-BASS S501 ROTARY ENCODER RE501
+8V
BATT
RE IN0 106 RE IN1 107 35 CD ON 32 MD ON
CD5V
+5V REG Q909
CD POWER CONTROL Q907,908 MD 8V
+8V REG Q912
CD POWER CONTROL Q910,911
BATT
KEY IN1 47 KEY IN2 48 D919 111 ANT REM 109 PW ON NIL 79 KEY ACTIVE Q914,915 D918 NIL 37
KEY MATRIX LSW511-529 S502
ANT+B AMP+B BU5V
ANT POWER CONTROL Q924,925
1 AMP ON 2 AMP+B VCC 4 5 BU+B POWER SUPPLY IC901
BATT IN1 61 RC IN0 49 CNP802 (REMOTE IN)
04
24
24
CDX-2500R
4-7. SCHEMATIC DIAGRAM -- CD MECHANISM SECTION -- · Refer to page 25 for Waveforms. · Refer to page 35 for IC Block Diagrams.
(Page 30)
Note: · Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY : Impossible to measure
27
27
CDX-2500R
4-9. SCHEMATIC DIAGRAM -- MAIN SECTION (1/3) -- · Refer to page 37 for IC Block Diagrams.
(Page 27)
(Page 31)
(Page 32)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY
30
30
CDX-2500R
4-10. SCHEMATIC DIAGRAM -- MAIN SECTION (2/3) -- · Refer to page 38 for IC Block Diagrams.
(Page 30)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY
31
31
(Page 32)
CDX-2500R
4-11. SCHEMATIC DIAGRAM -- MAIN SECTION (3/3) -- · Refer to page 38 for IC Block Diagrams.
(Page 30)
(Page 31)
(Page 33)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : MW < > : CD PLAY
32
32
CDX-2500R
4-12. SCHEMATIC DIAGRAM -- DISPLAY SECTION --
(Page 32)
Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM
33
33