Sony MDX-C7970 Service Manual Download Page 8 | Manualshive

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MDX-C7970/C7970R

– 53 –

– 54 –

• Voltages are dc with respect to ground under no-signal

(detuned) conditions.
no mark : FM
(

) : AM (MW)

[

] : LW

〈〈

〉〉

: MD PLAY

4-16.

SCHEMATIC DIAGRAM – MAIN Board (4/4) –

•

See page 66 for IC Block Diagrams.

(Page 52)

(Page 48)

(Page 49)

(Page 61)

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Summary of Contents for MDX-C7970

Page 1: ... 138 Optical Pick Up Name KMS 241B J1NP US Model Canadian Model E Model MDX C7970 AEP Model UK Model MDX C7970R SPECIFICATIONS MDX C7970 C7970R Photo MDX C7970R FM AM MW LW MINIDISC PLAYER Continued on next page For RM X4S Remote Commander please refer to RM X4S Service Manual 9 925 698 previously issued ...

Page 2: ...with respect to ground under no signal conditions no mark MD PLAY Impossible to measure The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Les composants identifiés par une marque sont critiques pour la sécurité Ne les remplacer que par une piéce portant le numéro spécifié Page 39 ...

Page 3: ...HEMATIC DIAGRAM SERVO Board 2 3 See page 67 for Waveforms See page 62 for IC Block Diagrams 40 Voltages and waveforms are dc with respect to ground under no signal conditions no mark MD PLAY Impossible to measure Page 38 Page 41 ...

Page 4: ... C7970R 41 4 10 SCHEMATIC DIAGRAM SERVO Board 3 3 See page 67 for Waveform 42 Voltages and waveforms are dc with respect to ground under no signal conditions no mark MD PLAY Impossible to measure Page 40 Page 47 ...

Page 5: ...ATIC DIAGRAM MAIN Board 1 4 See page 67 for Waveforms See page 65 for IC Block Diagrams Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark FM AM MW LW MD PLAY Page 42 Page 52 Page 53 Page 49 ...

Page 6: ...MDX C7970 C7970R 49 50 4 14 SCHEMATIC DIAGRAM MAIN Board 2 4 Voltages are dc with respect to ground under no signal detuned conditions no mark FM Page 48 Page 54 ...

Page 7: ...2 4 15 SCHEMATIC DIAGRAM MAIN Board 3 4 See page 67 for Waveforms See page 65 for IC Block Diagrams Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark FM AM MW LW Page 48 Page 53 ...

Page 8: ...70R 53 54 Voltages are dc with respect to ground under no signal detuned conditions no mark FM AM MW LW MD PLAY 4 16 SCHEMATIC DIAGRAM MAIN Board 4 4 See page 66 for IC Block Diagrams Page 52 Page 48 Page 49 Page 61 ...

Page 9: ...MDX C7970 C7970R 57 58 4 18 SCHEMATIC DIAGRAM DISPLAY Board See page 68 for Waveform Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark FM Page 61 ...

Page 10: ... 61 4 20 SCHEMATIC DIAGRAM SUB Board MDX C7970 C7970R Page 54 Page 57 ...

Page 11: ...V 60 FILO 59 FILI 58 PCO 57 PDO 55 RFI 56 AVSS 54 BIAS 53 AVDD 52 ASYI 51 ASYO 67 VC 66 AUX1 65 FE 64 ABCD 63 BOTM 62 PEAK 50 MVCI 49 D3 48 D2 47 D0 46 D1 45 XWE 44 XRAS 43 A09 42 XCAS 41 XOE 40 DVSS 39 A11 38 A08 37 A07 36 A06 35 A05 34 A04 33 A10 32 A00 31 A01 30 A02 29 A03 28 DVDD 26 XBCK 27 FS256 25 LRCK 24 DADT 23 ADDT 22 DOUT 21 DIN 20 DVSS 19 NC 18 XTSL 17 OSCO 16 OSCI 15 TX 14 XINT 13 RECP...

Page 12: ...6 TE 25 WBLADJ 24 VCC 23 3TADJ 22 EQADJ 21 VREF 20 F0CNT 19 XSTBY 18 XLAT 17 SCLK 16 SWDT 15 TEMPR 14 TEMPI 13 GND 12 APCREF 11 APC 10 PD 9 F 8 E 7 D 6 C 5 B 4 A 3 VC VI CONV BGR VREF SCRI PARA DECODE AUXSW COMMAND IVR GSW IV FF FBAL FF TG SEA 1 2 TG TEA WBL 3T EQ DET ADIP AGC WBL BPF22 BPFC ABCDA FEA WBL ATA CVB RFA1 1 2 1 2 GRVA CFST RFA2 GRV HLPT PTGR 2 1 1 2 BOTTOM PEAK RF AGC EQ EQ DET P P WB...

Page 13: ...NTERFACE AMP INTERFACE AMP AMP INTERFACE PREDRIVE PREDRIVE PREDRIVE PREDRIVE AMP INTERFACE AMP AMP AMP VDD PSB AMP 1 2 3 4 OUT1 VM VCC FIN 8 7 6 5 GND OUT2 VREF RIN CONTROL LOGIC TSD POWER SAVE DRIVER DRIVER 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 21 22 23 24 25 26 A0 A9 SENSE REFRESH AMP INPUT OUTPUT CONTROL SWITCH 4 INPUT BUFFER 4 OUTPUT BUFFER CLOCK OSC COLUMN DECODER MEMORY CELL 419...

Page 14: ...AM SWITCH 5 BIT PROGRAMMABLE COUNTER 11 BIT PROGRAMMABLE COUNTER 11 21 BIT PROGRAMMABLE COUNTER IIC BUS INTERFACE FM AM SWITCH REFERENCE OSCILLATOR 14 BIT PROGRAMMABLE COUNTER CONTROL TIMER PORT EXTENSION SCOUT MRO MPTH TCON OSCO OSCI VSSD VDDD DAVN SDA VREF MPX VSSA VDDA AFIN MAD PSWN SCL 2 1 6 15 11 13 16 14 12 INTERFACE REGISTER SIGNAL QUALITY DECODER CLOCKED COMPARATOR POWER SUPPLY RESET TEST ...

Page 15: ...CUIT SOFT MUTE VOLUME CONTROL CIRCUIT COMPANDER TREBLE BASS CONTROL CIRCUIT SUBWOOFER OUT FADER SUBWOOFER LP IIC BUS DIGITAL CONTROL CIRCUIT POWER SUPPLY FRONT FADER FRONT FADER REAR FADER REAR FADER VOICE BANDPASS HP LP SDA SCL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1 2 3 4 5 6 7 8 9 10 14 13 12 11 BUS ON SWITCH RESET SWITCH BATTERY SWITCH BUS ON RST BATT CLK V...

Page 16: ...01 EXTAL MD PLAY Mode 7 IC304 3 IN MD PLAY Mode Approx 0 5 Vp p 2 7 Vp p 0 1 µs Approx 0 3 Vp p 3 5 Vp p 44 ns 1 2 Vp p 3 5 Vp p 23 µs 4 5 Vp p 356 µs MAIN Board 1 IC100 9 OSC IN FM AM MW Mode 2 IC102 5 OSC1 FM Mode 3 IC250 2 SWE MD PLAY Mode 4 IC250 3 TC MD PLAY Mode 5 IC700 XOA 2 7 Vp p 94 ns 2 8 Vp p 224 ns 14 2 Vp p 24 µs 1 1 Vp p 12 µs 2 1 Vp p 30 µs ...

Page 17: ... 68 6 IC700 X1 KEY Board 1 IC801 º OSC IN 5 8 Vp p 271 ns 2 8 Vp p 3 5 µs ...

Page 18: ...ic head on off output Not used fixed at L 16 OSCI I System clock signal 512Fs 22 5792 MHz input from the oscillator circuit 17 OSCO O System clock signal 512Fs 22 5792 MHz output terminal Not used open 18 XTSL I Input terminal for the system clock frequency setting L 45 1584 MHz H 22 5792 MHz fixed at H in this set 19 RVDD Power supply terminal 3 3V digital system 20 RVSS Ground terminal digital s...

Page 19: ...supply terminal 3 3V analog system 70 ADRT I A A D converter operational range upper limit voltage input terminal fixed at H in this set 71 ADRB I A A D converter operational range lower limit voltage input terminal fixed at L in this set 72 AVSS Ground terminal analog system 73 SE I A Sled error signal input from the CXA2523R IC302 74 TE I A Tracking error signal input from the CXA2523R IC302 75 ...

Page 20: ... 94 SPFD O Spindle servo drive PWM signal output to the BH6511FS IC303 95 FGIN I Not used fixed at L 96 TEST1 I 97 TEST2 I Input terminal for the test fixed at L 98 TEST3 I 99 DVSS Ground terminal digital system 100 EFMO O EFM signal output terminal when recording mode Not used open I A for analog input O 3 for 3 state output and O A for analog output in the column I O ...

Page 21: ... circuit BPF3T 24 VCC Power supply terminal 3 3V 25 WBLADJ I Center frequency setting terminal for the internal circuit BPF22 26 TE O Tracking error signal output to the CXD2652AR IC301 27 CSLED I Connected to the external capacitor for low pass filter of the sled error signal 28 SE O Sled error signal output to the CXD2652AR IC301 29 ADFM O FM signal output of the ADIP 30 ADIN I Receives a ADIP F...

Page 22: ... 4M bit external D RAM H 2M bit internal D RAM of CXD2652AR fixed at L in this set 24 25 NCO O Not used open 26 MNT0 I Focus OK signal input from the CXD2652AR IC301 H is input when focus is on L NG 27 MNT1 I Track jump detection signal input from the CXD2652AR IC301 28 MNT2 I Busy monitor signal input from the CXD2652AR IC301 29 MNT3 I Spindle servo lock status monitor signal input from the CXD26...

Page 23: ... PCM1718E IC101 CXD2652AR IC301 and BH6511FS IC303 L reset 60 BU IN I Battery detect signal input from the SONY bus interface IC600 and battery check circuit H battery on 61 BUS ON I SONY bus on off control signal input from the master controller IC700 L bus on 62 SQSY I Subcode Q sync SCOR input from the CXD2652AR IC301 L is input every 13 3 msec Almost all H is input 63 C SW I Inputs the disc lo...

Page 24: ...OL SO O Serial data output for the electrical volume Not used open 27 VOL CKO O Serial data transfer clock signal output for the electrical volume Not used open 28 DSTSEL0 I Destination setting terminal Except German models fixed at H German model fixed at L 29 SYSRST O System reset signal output to the MD mechanism controller IC501 and SONY bus interface IC600 L reset 30 DSTSEL1 I Destination set...

Page 25: ...m controller IC501 H lock 59 EMPH ON O Emphasis control signal output terminal Not used open 60 AU ATT O Audio line muting on off control signal output terminal H muting on 61 AF ATT O Preamp muting on off control signal output to the electrical volume IC300 H muting on 62 TU ATT O Muting on off control signal output of the FM tuner signal H muting on Used for the MDX C7970R only MDX C7970 Not use...

Page 26: ...ional mode fixed at H in this set 89 MD0 I Setting terminal for the CPU operational mode fixed at H in this set 90 RESET I System reset signal input from the reset signal generator IC501 and reset switch S900 L reset L is input for several 100 msec after power on then it changes to H 91 VSS Ground terminal 92 X0 I Main system clock input terminal 3 68 MHz 93 X1 O Main system clock output terminal ...

Page 27: ...upply on off control signal output to the BA3918 IC800 L AM power on H FM power on 111 TU ON O Tuner system power supply on off control signal output to the BA3918 IC800 H tuner power on 112 to 118 NC O Not used open 119 VSS Ground terminal 120 NC O Not used open ...

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