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Harman Kardon FL 8370, Technical Manual

The Harman Kardon FL 8370 brings exceptional audio quality to your living space. Ensure you maximize its potential by downloading the comprehensive Owner's Manual for free from manualshive.com. This manual provides detailed instructions and insights, enabling you to fully enjoy the features and capabilities of this remarkable product.

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FL8370

2.2 Tracking Servo Block

During detection of defect, the tracking error signal is outputted through the tracking servo loop after
passing the low pass filter formed by connecting a capacitor(0.1uF) and a built-in 470K

Ω

 resistor to the

TDFCT pin(pin57) in case of tracking phase compensation. The value of tracking gain up/down can be
controlled by TGU and TG2 pin. The peak frequency of tracking loop phase compensation, the dynamic
range and offset of opamp can be adjusted by changing the value of resistor connected to FSET pin
same as focus loop. In case of unstable status of actuator after jumping, the ON/OFF of tracking loop is
controlled by TM7 switch of break circuit.
After 10-track jumping, servo circuit gets out of the liner range and actuator's tracking becomes
occasionally unstable. Hence unnecessary jumping with many tracking error should be prevented.

Figure 16. Tracking servo block

-

+

53

57

61

62

TRACKING
PHASE
COMPENSATION

49

50

TE2

470K

TDFCT

680K

TGU

TG2

470K

20K

10K

110K

82K

680K

66PF

10K

90K

FSET

TE-

TG1

TG1

TM1

TG2

TM7

TM3

TM4

DFCTI

 6

TEO

16

Summary of Contents for FL 8370

Page 1: ... BEAM SAFETY PRECAUTIONS 2 2 CONTROL AND FUNCTIONS 4 3 SPECIFICATIONS AND FEATURES 7 4 AUDIO CHARACTERISTICS TEST PROCEDURE 9 5 CIRCUIT DESCRIPTION 11 6 CRITICAL I C SPECIFICATION 18 7 PART LIST 49 8 TROUBLE SHOOTING GUIDE 64 9 BLOCK DIAGRAM 70 12 DISASSEMBLY INSTRUCTIONS 89 13 GENERAL UNIT PARTS LIST 94 10 SCHEMATIC DIAGRAMS 71 11 PCB LAYOUT 74 Harman kardon continually strives to improve its pro...

Page 2: ...beam coming from the pickup or allow it to strike against your skin This compact disc player uses a pickup that emits a laser beam The laser beam is emitted from the location shown in the figure When checking the laser diode be sure to keep your eyes at least 1 foot away from the pickup lens when the diode is turned on Do not look directly at the laser beam CAUTION Using controls and adjustment or...

Page 3: ...yer can be damaged by electrostatic discharge from your clothes or your body Proper electrostatic grounding for service personal is required during servicing BEFORE REPAIRING THE COMPACT DISC PLAYER Preparation Human Body Grounding Many of the components used in this compact disc player including the laser pickup are sensitive to electrostatic discharge Service personal should be grounded with an ...

Page 4: ...the unit will play the first 10 seconds of each track on the disc and then move to the next track Press the button again to defeat the function and continue full play of the current track Press this button to remove tracks from a programmed sequence Each press of the button will remove one track starting with the last track programmed to play This button is used to program the playback of a disc i...

Page 5: ...et If the outlet is switch controlled make certain that the switch is in the ON position Connect this jack to the coaxial digital input of a digital audio video receiver or an external digital to analog converter for direct access to the digital signals of the FL8370 DO NOT connect this jack to the standard audio inputs of any device Connect this jack to the input of anther compatible Haman Kardon...

Page 6: ...he disc and then move to the next track Press the button again to defeat the function and continue full play of the current track Press this button once to continuously repeat the track currently being played Press it a second time to repeat the entire disc Press this button to change to the next disc If a disc position is empty the FL8370 will automatically search for the next position that conta...

Page 7: ...FL8370 0 1 2 3 0 4 5 67 8 69 3 69 3 69 3 69 8 69 3 6 3 1 0 7 0 0 A B A B 5 C B B 2 A D D 2 A D D 2 C A D 49 0 0 A 0 B B 0 3 A B B 7 0 B 5 C A B B 2 C A D D 7 ...

Page 8: ... 2 2 2 7 6 2 2 2 2 2 E6 8 4 0 F 8 0 F 8 0 F 8 F 8 6 6 2 1 1 FL8370 8 ...

Page 9: ...er to LEVEL mode 3 Select track 2 of the test disc and play the CD disc 4 The output voltage and gain of the R L channels are taken by pressing the respective buttons on the control board of Audio Analyzer Frequency Response 1 Set the mode of the filter to reference level mode 2 Select the track 3 4 5 and 6 of the test disc and run it under Play mode 3 Check the output of the R L Channels Total Ha...

Page 10: ...dio analyzer to DIST Mode 3 Set the unit of the audio analyzer to dB mode 4 Play track 17of the test disc 5 The dynamic range should be A 60dB Channel Separation 1 Set the mode of the filter to DIST CH SP mode 2 Set the audio analyzer to LEVEL mode 3 Play the tracks 8 9 10 11 4 The measured results is the difference between L R channel De emphasis 1 Press the THRU button of the CD filter 2 Play th...

Page 11: ...oltage applied to the of focus error amp can be changed by output voltage of D A converter as shown in diagram so that the offset of focus error amp can be adjusted automatically by controlling 5 bits counter switches Focus error bias can be adjusted from the range of 100mV 100mV by connecting the resistor on pin 63 FEBIAS Figure 5 Focus error amp circuit note1 VA and VB refer to output signal of ...

Page 12: ...m program Figure 6 Tracking error amp circuit 1 4 Focus OK Circuit The FOK is the output The focus OK circuit generates a timing window to enable focus servo operation from focus search status When the difference of the RFO pin74 signal and DC coupled signal IRF pin75 are above the predefined voltage the Focus OK circuit output pin40 becomes active High output The predefined voltage is 0 39V Figur...

Page 13: ...irror hold must be sufficiently larger than that of the traverse signal Figure 8 Mirror Circuit 1 6 EFM Comparator The EFM comparator converts a RF signal into a binary signal Beacuse the asymmetry generated due to variations in disc manufacturing can not be eliminated by the AC coupling alone this circuit uses to control reference voltage of EFM comparator for eliminating asymmetry Figure 9 EFM C...

Page 14: ...efect detection signal Figure 10 Defect Circuit 1 8 APC Auto Power Control Circuit The laser diode has large negative temperature characteristic in its optical output when driven with a constant current on laser diode Therefore the output on processing monitor photo diode must be a controlled current for getting regular output power thus the APC Auto Power Control circuit is composed Figure 11 APC...

Page 15: ...the resistor connected to FSET pin pin 6 is 510KΩ and it is inversely proportional to the resistor connected to the FSET pin While the focus search is operating the FS4 switch is on and then the focus error signal is isolated accordingly the focus search signal is outputted by FEO pin pin 48 When the FS2 switch is on focus on the focus servo loop is on and the focus error signal from FE2 pin pin 5...

Page 16: ...mic range and offset of opamp can be adjusted by changing the value of resistor connected to FSET pin same as focus loop In case of unstable status of actuator after jumping the ON OFF of tracking loop is controlled by TM7 switch of break circuit After 10 track jumping servo circuit gets out of the liner range and actuator s tracking becomes occasionally unstable Hence unnecessary jumping with man...

Page 17: ... spindle servo error signals is eliminated In CLV S mode SMEF becomes L and pin 25 low pass filter fc lowers strengthening the filter further The characteristics of high frequency phase compensation in focus tracking servo and the characteristics of cut off frequency in CLV low pass filter are tested by FSET pin Figure 18 Spindle servo block 43 44 42 PS 4 3 X 1 X 2 X 3 X 4 0 0 0 1 1 0 1 1 SLO SL S...

Page 18: ...ions It consist of blocks for RF signal processing focus tracking sled and spindle servo Also this IC has adjustment free function and embed ded opamp for audio post filter FEATURES RF amplifier RF equalizer Focus error amplifier servo control Tracking error amplifier servo control Mirror defect detector circuit Focus OK detector circuit APC Auto Laser Power Control circuit for constant laser powe...

Page 19: ... 17 12 11 9 10 Focus Phase Compensation Offset cancel circuit Tracking Phase Compensation Block Jump Pulse GEN Sled Servo Amplifier Sled Kick GEN Spindle Servo LPF Double Speed Mirror Detection Circuit FOK Detection Circuit MICOM TO SERVO CONTROL AUTO SEQUENCER ADJUSTMENT FREE CONTROL Built in Post Filter Amp L R FS1 FS4 TM1 TM6 BAL1 BAL5 PS1 PS4 GA1 GA5 RF RFO PD1 PD2 F E EI PD LD VR EQO IRF ASY ...

Page 20: ... 48 47 46 45 44 43 42 41 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 KB9223 MCP DCB FRSH DCC2 DCC1 FSET VDDA VCCP GC2I GC2O CH2I CH2O CH1O CH1I GC1O GC1I RRC VSSP MUTEI ISET VREG WDCK SMDP SMON SMEF FLB FS3 FGD LOCK TRCNT ISTAT ASY EFM VSSA MCK MDATA MLT RESET MIRROR FOK DVEE FEBIAS TG2 TGU FDFCT FE1 FE2 TDFCT DVDD LPFT TE1 TE2 TZC ATSC TEO TE FEO FE SPDLO SPDL SL SLO SL SSTOP GND EI EQC RFI E...

Page 21: ... The input pin for post filter channel2 12 CH2O The output pin for post filter channel2 13 CH1O The output pin for post filter channel1 14 CH1I The input pin for post filter channel1 15 GC1O Amplifier output pin for gain and low pass filtering of DAC output CH1 16 GC1I Amplifier negative input pin for gain and low pass filtering of DAC output CH1 17 RRC The pin for noise reduction of post filter b...

Page 22: ...focus OK comparator 61 TGU The capacitor connection pin for high frequency tracking gain switch 62 TG2 The pin for high frequency gain change of tracking servo loop with internal TG2 switch 63 FEBIAS Focus error bias voltage control pin 64 DVEE The DVEE pin for logic circuit 65 PD1 The negative input pin of RF I V amplifier1 A C signal 66 PD2 The negative input pin of RF I V amplifier2 B D signal ...

Page 23: ...76 EQO The output pin for AGC 77 RFI Tne input pin for EFM comparision 78 EQC The capacitor connection pin for AGC 79 EI Feedback input pin of E I V amplifier for EF Balance control 80 GND GND for RF part Table 1 PIN DESCRIPTION Continued Pin No Symbol Description 23 ...

Page 24: ... Vrfpp1 SG3 DC 2 7V pin 74 3 8 V RF Amp Min Output Voltage Vrfpp2 SG3 DC 2 3V pin 74 1 2 V Focus Error Amp Offset Voltage Vfeo1 input open pin 59 450 250 50 mV Focus Error Amp Auto Offset Voltage Vfeo2 WDCH 88 2KHz Pulse 841 pin 59 35 0 35 mV Focus Error Amp PD1 Voltage Gain Gfe1 SG3 f 10KHz 32mVp p sine pin 59 27 30 33 dB Focus Error Amp PD2 Voltage Gain Gfe2 SG3 f 10KHz 32mVp p sine pin 59 27 30...

Page 25: ...FL8370 KS9284 M M 97 P006 1997 10 17 25 ...

Page 26: ...FL8370 KS9284 M M 97 P006 1997 10 17 26 ...

Page 27: ...FL8370 KS9284 M M 97 P006 27 ...

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Page 33: ...FL8370 KA9258D 33 ...

Page 34: ...FL8370 KA9258D 34 ...

Page 35: ...KA9258D FL8370 35 ...

Page 36: ...re that im proves audio dynamic performance and reduces jitter sensitivity The internal digital filter operates at 8x oversampling at a 96kHz sampling rate with 120dB stopband attenuation International Airport Industrial Park Mailing Address PO Box 11400 Tucson AZ 85734 Street Address 6730 S Tucson Blvd Tucson AZ 85706 Tel 520 746 1111 Twx 910 952 1111 Internet http www burr brown com Cable BBRCOR...

Page 37: ...age 6 Full Scale 0dB 0 57 VCC Vp p Center Voltage 0 5 VCC V Load Impedance AC Load 5 kΩ DIGITAL FILTER PERFORMANCE Filter Characteristics 1 fS 44 1kHz 48kHz optimal Passband 0 002dB 0 471fS 3dB 0 487fS Stopband 0 515fS Passband Ripple 0 453fS 0 0001 dB Stopband Attenuation Stopband 0 515fS 109 dB Stopband 0 520fS 123 dB Delay Time 81 fS sec Filter Characteristics 2 fS 88 2kHz 96kHz optimal Passban...

Page 38: ...2 dB VO 60dB 33 dB Dynamic Range EIAJ A Weighted 96 dB Output Voltage Sine Wave 0dBFS 0 285VCC Vp p DYNAMIC ANALOG PERFORMANCE HDCD CD Digital HDCD SCALING 2 Total Harmonic Distortion Noise VO 0dB 0dBFS 91 dB VO 60dB 34 dB Dynamic Range EIAJ A Weighted 4 104 dB Output Voltage Sine Wave 0dBFS 0 285VCC Vp p 6dBFS 5 0 57VCC Vp p NOTES 1 Without dither 2 Gain pin is LOW 3 With the rectangular PDF dith...

Page 39: ...s integrated circuit can be damaged by ESD Burr Brown recommends that all integrated circuits be handled with appropriate precautions Failure to observe proper handling and installation procedures can cause damage ESD damage can range from subtle performance degradation to complete device failure Precision integrated circuits may be more susceptible to damage because very small parametric changes ...

Page 40: ... motor with the control pin voltage VR Applications VCRs and cassette tape recorders Features 1 Power transistors can handle a large current 1 6A maximally 2 Brake is applied when stopping the motor 3 Built in function to absorb rush currents generated by reversing and braking 4 Motor speed controlling pin 5 Small standby current VCC 12V IO 5 5mA typically 6 Stable operation during mode changes ei...

Page 41: ...er IC BA6209 BA6209N FAbsolute maximum ratings Ta 25_C FRecommended operating conditions Ta 25_C FElectrical characteristics unless otherwise noted Ta 25_C and VCC 12V FElectrical characteristic curves FL8370 41 ...

Page 42: ...Motor driver IC BA6209 BA6209N FL8370 42 ...

Page 43: ...Motor driver IC BA6209 BA6209N Measurement circuit FL8370 43 ...

Page 44: ... current absorption circuit When a high voltage caused by such as a motor rever sal is generated on OUT1 and OUT2 an internal comparator detects the high voltage and turns on an in ternal circuit that absorbs rush currents 4 Drive circuit The forward direction of the motor connected between OUT1 and OUT2 corresponds to the current flow from OUT1 to OUT2 and the reverse direction corresponds to the...

Page 45: ...MDATA MLAT MCLK STAT P66 LKFS FOK P63 P62 P61 P60 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 P2 1 P2 0 DAC DATA DAC CLK DAC LAT HDCD RL RL TRSW DSNS P7 7 POWER P7 5 MUTE P7 3 V CC PB 1 AN 1 PB 0 AN 0 AV SS TEST X 2 X 1 V SS OSC 1 OSC 2 RES S0 S1 S2 DN UP S0S1 P22 VFD DO VFD DI VFD CLK VFD LAT P14 P1 5 TRCNT REMOTE AVCC PB7 AN7 PB6 AN6 PB5 AN5 PB4 AN4 PB3 AN3 PB2 AN2 Figure 1 2 Pin Arrangement...

Page 46: ...1 P50 INT0 Port 1 P10 TMOW P14 PWM P15 IRQ1 P16 IRQ2 P17 IRQ3 TRGV Port 2 P20 SCK3 P21 RXD P22 TXD Port 3 P30 SCK1 P31 SI1 P32 SO1 P90 FVPP P91 P92 P93 P94 Port 9 PB 0 AN 0 PB 1 AN 1 PB 2 AN 2 PB 3 AN 3 PB 4 AN 4 PB 5 AN 5 PB 6 AN 6 PB 7 AN 7 V SS V CC RES IRQ 0 TEST OSC 1 OSC 2 X 1 X 2 CPU H8 300L Data bus lower System clock generator Subclock generator RAM Timer A SCI1 Timer B1 Watchdog timer A ...

Page 47: ...OK 22 LKFS CD DSP tracking lock output 5V servo lock 23 P66 No connection 24 STAT CD DSP internal status output 25 MCLK CD DSP serial command clock 26 MLAT CD DSP command latch 27 MDATA CD DSP serial command data 28 XRST CD DSP reset line 0V DSP reset 29 P54 No connection 30 P55 No connection 31 SQCK SUBQ output serial clock 32 SUBQ SUBQ output 33 VCC MCU power supply connected to 5V 34 P73 No con...

Page 48: ...mand serial clock 53 VFD LAT Display driver command serial latch 54 P14 No connection 55 P15 No connection 56 TRCNT CD DSP internal status for auto adjustment 57 REMOTE IR remote signal input 58 AVCC Connected to 5V 59 PB7 No connection 60 PB6 No connection 61 PB5 No connection 62 PB4 No connection 63 PB3 No connection 64 PB2 No connection ...

Page 49: ... QTY 1 2 3 13 15 4 1 2 1 1 1 1 4 3 2 1 1 2 2 1 1 3 2 1 1 1 1 2 1 3 3 2 5 FL8370 49 ...

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Page 51: ... 3 2 1 2 3 1 1 8 1 2 1 2 1 6 1 1 1 1 8 6 1 1 3 0 1 1 1 1 2 3 22 1 1 4 1 1 3 1 3 1 3 1 FL8370 51 ...

Page 52: ... 3 1 0 3 1 3 1 3 1 3 1 3 1 3 1 4 3 1 3 1 3 1 1 1 0 2 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 1 FL8370 52 ...

Page 53: ... 2 2 4 2 2 2 1 2 1 3 2 2 1 2 1 3 1 1 1 1 5 3 1 1 1 3 1 5 0 0 5 1 FL8370 53 ...

Page 54: ... 1 3 1 3 1 1 1 1 5 1 1 1 2 5 22 1 22 1 1 15 1 1 1 1 1 1 1 2 1 3 FL8370 54 ...

Page 55: ... 2 1 2 1 1 2 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 22 1 1 1 3 1 0 1 0 1 FL8370 55 ...

Page 56: ... 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 00 1 1 1 1 1 1 0 1 4 1 2 1 2 FL8370 56 ...

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Page 58: ... 0 1 0 2 0 0 1 3 22 1 1 1 1 1 4 1 1 1 1 4 1 1 4 4 1 1 1 4 1 1 1 1 4 1 1 1 1 1 1 1 1 4 4 1 4 1 1 1 2 7 2 0 1 0 1 0 7 FL8370 58 ...

Page 59: ... 0 1 0 1 0 0 1 0 0 1 0 0 3 0 0 6 2 0 0 1 0 0 3 1 4 4 1 4 1 1 4 1 1 1 1 1 1 1 1 4 1 1 1 1 4 1 1 4 1 4 1 4 1 4 2 4 2 0 2 0 4 1 1 1 1 22 1 3 1 FL8370 59 ...

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Page 61: ... 0 0 2 0 0 0 1 0 0 1 1 4 1 1 4 1 1 4 1 4 1 4 1 4 1 4 1 1 4 1 4 1 4 1 4 1 5 5 1 4 1 1 FL8370 61 ...

Page 62: ... 4 1 4 2 4 1 4 1 4 1 4 1 4 1 1 1 1 2 1 4 1 1 1 1 1 4 1 4 1 1 0 2 1 1 1 4 1 0 0 1 4 0 0 6 2 2 4 4 0 0 0 1 0 0 2 0 37 0 3 0 1 0 7 0 18 0 2 0 1 0 2 FL8370 62 ...

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Page 96: ...Model FL8370 Exploded drawing List 012 3 4 1 4 1 56 1 56 1 7 8 7 9 8 4 96 6 6 56 1 4 1 88 8 1 1 8 1 0 3 FL8370 96 ...

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Page 99: ...Model 5CD Exploded drawing List 0 1 2 34 56 7 14 8 9 12 99 0 8 0 3 3 3 3 5 1 2 56 1 2 56 7 0 9 4 0 9 4 9 1 2 1 56 9 1 2 34 56 7 14 FL8370 99 ...

Page 100: ... 9 6 Model 5CD Exploded drawing List 0 3 3 9 4 9 1 2 56 1 3 14 0 14 0 1 2 34 56 7 0 0 1 2 56 1 5 14 9 6 1 3 3 0 3 0 1 3 1 2 56 3 16 16 1 0 3 FL8370 100 ...

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