Harman Kardon FL 8370 Technical Manual

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The Harman Kardon

Model FL 8370

COMPACT DISC CHANGER

Technical Manual

Power

Phones

Phones Level

LASER BEAM SAFETY PRECAUTIONS ............. 2

CONTROL AND FUNCTIONS ............................. 4

SPECIFICATIONS AND FEATURES ..................... 7

AUDIO CHARACTERISTICS TEST PROCEDURE

.............................................................................9

CIRCUIT DESCRIPTION ....................................11

CRITICAL I.C. SPECIFICATION ........................ 18

PART LIST ......................................................... 49

TROUBLE SHOOTING GUIDE .......................... 64

* Harman/ kardon continually strives to improve its products. The Fl8370 Compact Disc Changer design and

specifications are subject to change and may differ from the published specifications and descriptions, but will

always equal or exceed the original specifications unless otherwise stated.

DANGER: Invisible laser radiation when open and interlock failed or defeated.

FL 8370

AVOID DIRECT EXPOSURE TO BEAM.

Time

Repeat

Intro

Clear

Program

CONTENTS

BLOCK DIAGRAM ............................................. 70

10. SCHEMATIC DIAGRAMS .................................. 71

11. PCB LAYOUT ..................................................... 74

12. DISASSEMBLY INSTRUCTIONS ........................ 89

13. GENERAL UNIT PARTS LIST .............................. 94

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Parts and Service Office

250 Crossways Park Dr., Woodbury, N.Y. 11797

1112-FL8350 P9603 1200 Printed in Hong Kong

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Summary of Contents for Harman Kardon FL 8370

Page 1 The Harman Kardon Model FL 8370 COMPACT DISC CHANGER Technical Manual FL 8370 Skip Play Pause Disc Skip Search Stop Random Open/Close Power Phones Phones Level Time Repeat Intro Clear Program CONTENTS BLOCK DIAGRAM ..........70 LASER BEAM SAFETY PRECAUTIONS ..... 2 10.
Page 2: Laser Beam Safety Precautions
LASER BEAM SAFETY PRECAUTIONS CLASS 1 LASER PRODUCT CAUTION Invisible laser radiation when the unit is open. Do not stare into beam. CAUTION: USE OF ANY CONTROLS, ADJUSTMENT, OR PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.
Page 3: Safety Precautions
SAFETY PRECAUTIONS This symbol is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to consti- tute a risk of electric shock to persons. This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
Page 4: Front Panel Controls
Repeat Button : Press this button the FL 8370 is first turned on by or the other side of the button to once to constantly repeat the track pressing this switch, the...
Page 5: Rear Panel Connections
Fl8370 provide signals to other products. Remote Control Output Connect this output of a remote infrared sensor or the remote control output of another compatible Harman Kardon product. This will enable the remote control system to operate even when the front panel Remote Sensor blocked.
Page 6: Remote Control Functions
Pause Button: Press this button once to momentarily pause a disc. When the button is pressed again, the disc will resume play from the point at which it was FL 8370 paused. Program Button: This button is used to program the playback of a disc in a particular order.
Page 7 FL8370 ! "#$%&" '&() '*() + ,,--* , . / 0 ! &/ 1 /230 4. * / 5 67869&&369&&3 69*369&& +869**&3:6*& '3;1 <(++ +0! 7 0 & #0! , (++ =+ < ''! ...
Page 8 FL8370 ?.+2+* * : 2+* = * ! 2+* & *& + <7+;& = = 6 2+ , , 2+ 2 . 2 . ' 2 .E6+ , ' 8 / 4"0 /'F. / :8 ∅& 0 F.# / 8 ∅& 0 F. , +! 8 ?. /'F.
Page 9 FL8370 Audio Characteristics Test Procedure Test Equipment 1. 3346 CD Player Evaluating Filter x 2 (NF Electronic Instrument) 2. VP7722 Panasonic Audio Analyzer 3. Sony YEDS18 Test CD disc Procedure Equipment Setup 1. The audio output of the CD player under test is connected to the CD filter L &...
Page 10 FL8370 Signal to Noise Ratio 1. Set the mode of the filter to ‘ S/N’ mode 2. Play track 2 of the test disc 3. The unit of the audio analyzer is set to dB mode 4. Press the S/N key on the control panel of the audio analyzer 5.
Page 11 FL8370 FUNCTION DESCRIPTION 1.RF Amp Block 1.1 RF Amplifier The optical currents inputted through pins PD1(A+C) and PD2(B+D) are converted into voltages through I-V amp, and they are added to RF summing amp. The voltage, converted from the photo diode (A+B+C+D) signal, is outputted through RFO(pin74) and the eye pattern can be checked at this pin.
Page 12 FL8370 1.3 Tracking Error Amp The optical currents detected from the side photo diode (E and F) pf pick-up are inputted to the E and F pin and converted into voltage signals by E I-V and F I-V amp. The output of tracking error amp generates the difference between E I-V AMP and F I-V AMP voltage output.
Page 13 FL8370 1.5 Mirror Circuit IRF signal is amplified by the mirror amp, and the peak and bottom component of amplified signal are detected by peak and bottom hold circuit. The peak hold circuit covers traverse signal of up to 100KHz component and bottom hold circuit capable of covering the envelope frequency of disc rotation.
Page 14 FL8370 1.7 Defect Circuit The RFO signal bottom, after being inverted, is held with two time constants of long and short. The short time-constant bottom hold is done for a disc mirror defect more than 0.1msec, the long time- constant bottom hold is done with the mirror level prior to the defect. By differentiating this with a capacitor coupling and shifting the level, both signals are compared to generate the mirror defect detection signal.
Page 15 FL8370 2.Servo Block 2.1 Focus Servo Block When defect is "H"(the defect signal is detected), the focus servo loop is muting in case of focus phase compensation. At this time, the focus error signal is outputted through the low pass filter formed by connecting a capacitor(0.1uF) and a built-in 470KΩ...
Page 16 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 470KΩ 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.
Page 17 FL8370 2.3 Sled Servo Block The moving of pick-up is controlled by tracking servo output through a low pass filter. The sled kick voltage is outputted for track jump operation. Figure 17. Sled servo block 2.4 Spindle Servo Block The 20KΩ resistor and 0.33uF capacitor form the 200Hz low pass filter, and the carrier component of spindle servo error signals is eliminated.
Page 18 FL8370 KB9223 RF AMP & SERVO SIGNAL PROCESSOR OVERVIEW 80-QFP-1420C The KB9223 is a 1-chip BICMOS integrated circuit to per- form the function of RF amp and servo signal processor for compact disc player applications.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.
Page 19 FL8370 KB9223 BLOCK DIAGRAM FDFCT Focus Phase Micom Data RF Amp Compensation Interface Logic & Offset cancel circuit TDFCT Focus Error Amp FE-BIAS Adjustment FEBIAS Tracking Phase Compensation Block Tracking Error Amp & Jump Pulse GEN. E/F Balance & Gain LPFT Control MICOM TO SERVO CONTROL...
Page 20 FL8370 KB9223 PIN CONFIGURATION 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 MIRROR RESET MDATA VSSA KB9223 ISTAT TRCNT LOCK SMEF 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Figure 2.
Page 21 FL8370 KB9223 PIN DESCRIPTION Table 1. PIN DESCRIPTION Pin No. Symbol Description Capacitor connection pin for mirror hold Capacitor connection pin for defect Bottom hold FRSH Capacitor connection pin for time constant to generate focus search waveform DCC2 The input pin through capacitor of defect bottom hold output DCC1 The output pin of defect bottom hold FSET...
Page 22 FL8370 KB9223 Table 1. PIN DESCRIPTION (Continued) Pin No. Symbol Description The pin for high frequency gain change of focus loop with internal FS3 switch Reducing high frequency gain with capacitor between FS3 pin LOCK Sled runaway prevention pin TRCNT Track count output pin ISTAT Internal status output pin...
Page 23 FL8370 KB9223 Table 1. PIN DESCRIPTION (Continued) Pin No. Symbol Description The input pin for AGC The output pin for AGC Tne input pin for EFM comparision The capacitor connection pin for AGC Feedback input pin of E I/V amplifier for EF Balance control GND for RF part M/M-97-P006 1997.
Page 24 FL8370 KB9223 ABSOLUTE MAXIMUM RATINGS Table 2. Absolute Maximum Ratings Characteristic Symbol Value Unit Supply Voltage Vmax Power Dissipation -20 ~ +70 Operating Temperature -55 ~ +150 Storage temperature ELECTRICAL CHARACTERISTICS Table 3. Electrical Characteristics (Ta=25°C, VDD = DVDD = VCC = +5V, VSS = DVSS = GND = VSSP = 0V ) Characteristic Symbol Test Conditions...
Page 25 FL8370 KS9284 M/M-97-P006 1997. 10. 17...
Page 26 FL8370 KS9284 M/M-97-P006 1997. 10. 17...
Page 27 FL8370 KS9284 M/M-97-P006...
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Page 33 FL8370 KA9258D...
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Page 36 FL8370 ® ® PCM1732 For most current data sheet and other product information, visit www.burr-brown.com 24-Bit, 96kHz, Stereo Audio DIGITAL-TO-ANALOG CONVERTER ® With HDCD Decoder FEATURES DESCRIPTION ENHANCED MULTI-LEVEL ∆Σ DAC The PCM1732 is designed for mid- to high-grade digital audio applications which achieve 96kHz sam- INPUT AUDIO DATA WORD: 16-, 20-, 24-Bit pling rates with 24-bit audio data, such as High Defi- SAMPLING FREQUENCY (f...
Page 37: Specifications
FL8370 SPECIFICATIONS 24-Bit Data Performance All specifications at +25°C, +V = +V = +5V, f = 44.1kHz, and SYSCLK = 384f , unless otherwise noted. PCM1732 PARAMETER CONDITIONS UNITS RESOLUTION Bits DATA FORMAT Audio Data Interface Format Standard/I Data Bit Length 16/20/24 Selectable Audio Data Format MSB-First, Binary Two’s Complement...
Page 38 FL8370 SPECIFICATIONS 16-Bit Data Performance All specifications at +25°C, +V = +V = +5V, f = 44.1kHz, and SYSCLK = 384f , unless otherwise noted. For discussion of HDCD scaling options, see the Applications Considerations section of this data sheet. PCM1732U PARAMETER CONDITIONS...
Page 39 FL8370 PIN CONFIGURATION PIN ASSIGNMENTS Top View SO-28 NAME DESCRIPTION LRCIN Left and Right Clock Input. This clock is equal to the sampling rate, f Serial Audio Data Input LRCIN ML/I BCKIN Bit Clock Input for Serial Audio Data CLKO Buffered System Clock Output.
Page 40 FL8370 Motor driver ICs Reversible motor driver BA6209 / BA6209N The BA6209 and BA6209N are reversible-motor drivers suitable for brush motors. Two logic inputs allow three output modes : forward, reverse, and braking. The motor revolving speed can be set arbitrarily by controlling the voltage applied to the motor with the control pin voltage V FApplications VCRs and cassette tape recorders...
Page 41 FL8370 Motor driver IC BA6209 / BA6209N FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) FElectrical characteristics (unless otherwise noted, Ta = 25_C and V = 12V) FElectrical characteristic curves...
Page 42 FL8370 Motor driver IC BA6209 / BA6209N...
Page 43 FL8370 Motor driver IC BA6209 / BA6209N FMeasurement circuit...
Page 44 FL8370 Motor driver IC BA6209 / BA6209N FCircuit operation Input / output truth table Rush 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.
Page 45 FL8370 MCU Pin Arrangement and Functions Pin Arrangement SUBQ VFD.DO SQCK VFD.DI VFD.CLK VFD.LAT XRST MDATA MLAT TRCNT MCLK REMOTE STAT LKFS Figure 1.2 Pin Arrangement...
Page 46 FL8370 Internal Block Diagram Figure 1.1 shows a block diagram. H8/300L Data bus (lower) /FTID /FTIC /FTIB /FTIA /FTOB /FTOA /TMOW /FTCI /PWM /IRQ /IRQ /IRQ /TRGV /SCK /TMOV Timer A SCI1 /RXD /TMCIV /TXD /TMRIV Timer B1 SCI3 /SCK CMOS large- Timer X current port...
Page 47 Pin Functions Pin Name Description No connection No connection AVSS Connected 0V TEST Connected 0V No connection Connected 5V MCU ground line; connected to 0V OSC1 10MHz crystal input OSC2 10MHz crystal input MCU reset line; 0V = reset; 5V = normal operation CD Changer Mechanism door position switch CD Changer Mechanism door position switch CD Changer Mechanism door position switch...
Page 48 No connection VFD.DO Display driver status serial data VFD.DI Display driver command serial data VFD.CLK Display driver command serial clock VFD.LAT Display driver command serial latch No connection No connection TRCNT CD DSP internal status for auto-adjustment REMOTE IR remote signal input AVCC Connected to 5V No connection...
Page 49 FL8370 ! " ...
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Page 94 FL8370 Model : FL8370 Exploded drawing List !" $!%"&'! !" ( ")'* ")'*) ( ,!' ( + --- '!,!'% # - -#* -- *!./ '!)
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Page 97 FL8370 / %! )1':< / %! )1':< / %! )1':<= & / %! )1':<...
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Page 100 FL8370 9 6)'* Model : 5CD Exploded drawing List +++ %)$*&03 %&!%''3 %&& !.) 9 ")4 "% 9' + 12/!"!-56 + -// + )'' !)'' + !)''.) )'' $ 1))*3 + -//,,%...
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Harman Kardon FL 8370 Technical Manual

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Summary of Contents for Harman Kardon FL 8370

Page 2: Laser Beam Safety Precautions

Page 3: Safety Precautions

Page 4: Front Panel Controls

Page 5: Rear Panel Connections

Page 6: Remote Control Functions

Page 37: Specifications