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Owner's Manual
The Harman Kardon
Model HD750
COMPACT DISC PLAYER
Technical Manual
Standby
1.
LASER 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 ........................ 15
7.
PART LIST ......................................................... 41
8.
TROUBLE SHOOTING GUIDE .......................... 48
* Harman/ kardon continually strives to improve its products. The HD750 Compact Disc Player 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.
CONTENTS
AVOID DIRECT EXPOSURE TO BEAM.
9.
BLOCK DIAGRAM ............................................. 54
10. SCHEMATIC DIAGRAMS .................................. 55
11. PCB LAYOUT ..................................................... 59
12. EXPLODED VIEW .............................................. 62
13. PACKING DRAWING ......................................... 63
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 HD750
- Page 1 PART LIST ............41 TROUBLE SHOOTING GUIDE ......48 * Harman/ kardon continually strives to improve its products. The HD750 Compact Disc Player 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.
- Page 2 HD750 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.
- Page 3 HD750 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...
- Page 4 4 CD Drawer: This drawer holds the discs Standby. When the HD750 is connected to a A Intro Button: Press this button to put the HD750 that will be played. Press the Open/Close but- switched AC outlet, such as those found on the ton 5 to open the drawer so that discs may be in teh Intro Scan mode.
- Page 5 ON position. Kardon remote controlled device to have the converter for direct access to the digital signals of HD750, DO NOT connect this jack to the standard remote sensor on the HD750 provide signals to other products.
- Page 6 HD750 Remote Control Functions Display Button Numeric Controls Clear Button Search Buttons Skip Buttons Stop Button Play Button Program Button Pause Button Check Button Time Button Random Button Repeat Button A B Button Power On Power Off Open/ Close Button...
- Page 7 HD750 HD750 Preliminary Production Specification Version 0.1 GENERAL INFORMATION < 1. Power Consumption Operating 18W; Standby <5W 2. Power Super 230V AC 50Hz 3. Dimensions 440 x 130 x 386mm 4. Product Outlook Refer to attached diagram 5. Remote Unit harman/kardon remote code 6.
- Page 8 HD750 HD750 Preliminary Production Specification Test Disc Specification Typical Limit Black Dot TCD 725B 1000um 600um Interruption MCD-131 900um 600um Finger print 75um 65um Vertical Deviation MCD-151 0.92mm 0.92mm Eccentricity TCD 712 140um 140um 8cm test disc TCD 783 Last Track...
- Page 9 HD750 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 HD750 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 HD750 FUNCTION DESCRIPTION Tracking System To Focus System REF1 REF2 Subtraction GCTRL TBAL GCTRL TEOUT TBAL PDIC The tracking error output of E and F is given to Pin 25 (TEOUT). C8 is required for oscillation-proof. R10 is chosen such that TEOUT of Pin 25 become 1.4Vp-p.
- Page 12 HD750 Focus System Subtraction GCTRL FBAL GCTRL PDIC FEOUT FBAL The focus error output of A, B, C and D are given to Pin 27. C4 is required for oscillation- proof. R7 is set such that FEOUT of Pin 27 becomes 1.46 Vp-p.
- Page 13 HD750 RF, EQ, AGC NRFDET RFOUT DETECTION DETECTION GCTRL GCTRL The signals A, B, C and D input from PDIC are composed into the RF signal by the RF Addition Amp, then output from RFOUT of Pin 5. This Amp is designed so that RFOUT is about 0.5 Vp-p for normal CD disc (about 0.4 Vp-p for CDR and 0.12 Vp-p for CDRW).
- Page 14 HD750 LDON LASER UNIT 170mV 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.
- Page 15 HD750 MN662790RSA1 Signal Processing LSI for CD Players Overview The MN662790RSA is a CD signal processing LSI that, (Audio circuits) on a single chip, combines optics servos for the CD player Digital filter using 8-fold oversampling (focus, tracking, and traverse servos), digital signal...
- Page 16 HD750 MN662790RAS1 Pin Assignment BYTCK/TVSTOP LDON CLDCK FCLK RFDET IPFLAG TRCRS FLAG CLVS VDET RFENV DEMPH FLAG6/RESY IOSEL TBAL TEST FBAL OUTL OUTR KICK RSEL CSEL PSEL MSEL SSEL (TOP VIEW) QFS080-P-1414...
- Page 17 HD750 MN662790RAS1 Block Diagram OUTR LRCKIN/MSEL BCLKIN/SSEL SRDATEIN/PSEL OUTL IOSEL CLVS BLKCK CLDCK FLAG SBCK IPFLAG SUBC DEMPH FLAG6/RESY SSEL SQCK SUBQ PLLF LRCK PLLF2 SRDATA DSLF BCLK DMUTE RSEL PSEL KICK MCLK BYTCK/TRVSTOP MDATA CK384/EFM VCOF2 VCOF TBAL FBAL...
- Page 18 HD750 MN662790RAS1 Pin Descriptions Pin No. Symbol Function Description BCLK SRDATA bit clock output. LRCK Left/right channel discrimination signal output. SRDATA Serial data output. Power supply for digital circuits. Ground for digital circuits. Digital audio interface output signal. MCLK Microcomputer command clock input. (Data is latched at rising edge.) MDATA Microcomputer command data input.
- Page 19 HD750 MN662790RAS1 Pin Descriptions (continued) Pin No. Symbol Function Description Tracking error signal input. (analog input) RFENV RF envelope signal input. (analog input) VDET Vibration detection signal input. "H" level: vibration detected. Offtrack signal input. "H" level: offtrack. TRCRS Track cross signal input.
- Page 20 HD750 MN662790RAS1 Pin Descriptions (continued) Pin No. Symbol Function Description CLVS Spindle servo phase synchronization signal output. "H" level: CLV. "L" level: rough servo. During default operation, subcode CRC check result output. "H" level: OK. "L" level: no good. During command execution, pulse output for external track counter.
- Page 21 0 H D750 AN8849SB Head amplifier IC for CD-ROM drive (for 24 times speed or more) Overview Unit: mm The AN8849SB is a head amplifier IC for +0.10 15.2±0.3 –0.05 digital servo. It can configure an efficient CD-ROM system in combination with the MN662752, and allows a full-automatic adjustment of tracking bal- ance-gain-offset and focus balance-gain-offset with fewer external parts.
- Page 22 HD750 AN8849SB Block Diagram 3TOUT LDON GCTRL FBAL CROSS NRFDET CCRS CAGC TEOUT TBAL EQSW RFOUT...
- Page 23 HD750 AN8849SB Pin Descriptions Pin No. Description Pin No. Description APC amp. input pin GND pin APC amp. output pin APC & masking control pin RF addition amp. inverted input pin output pin REF1 Power supply pin 1 CROSS output pin RF addition amp.
- Page 24 HD750 AN8849SB = 25°C Electrical Characteristics at T Parameter Symbol Conditions Unit = 5 V, V = 3.3 V Current consumption with no load 1 28.4 40.6 52.8 TOTAL1 +0.75 V EQSW REF2 = 5 V, V = 3.3 V Current consumption with no load 2 1.20...
- Page 25 HD750 AN8849SB = 25°C (continude) Electrical Characteristics at T Parameter Symbol Conditions Unit Tracking error amp. (continued) = 5 V, V = 3.3 V −8.35 −6.35 −4.35 Tracking error amp. +0.5 V balance relative output 2−H REF2 = 5 V, V = 3.3 V...
- Page 26 HD750 AN8849SB = 25°C (continued) Electrical Characteristics at T Parameter Symbol Conditions Unit NRF detection f = 500 kHz, V − 0.75 V NRF det. detection level 137 mV[p-p] RDA1 REF2 f = 500 kHz, V − 0.75 V ...
- Page 27 HD750 AN8814SB 4-channel driver IC for optical disk drive Overview Unit: mm The AN8814SB is a BTL system 4-channel 18.4±0.2 (5.15) driver and is encapsulated in the SMD package (4.8) which excels in heat radiation characteristic. (1.315) Features • Wide output dynamic range regardless of refer- ence voltage of the system •...
- Page 28 HD750 AN8814SB Pin Descriptions Pin No. Description Pin No. Description Motor driver-2 reverse rotation output pin Base control pin for an external transistor of 3.3 V regulator Motor driver-2 forward rotation output pin 3.3 V regulator output monitor pin Motor driver-1 reverse rotation output pin N.C.
- Page 29 HD750 AN8814SB = 25°C Electrical Characteristics at T Parameter Symbol Conditions Unit = 5 V Current consumption with no load Motor driver 1 to motor driver 4 = 5 V, V = 0 V, −10 Input offset voltage = 8 kΩ, R = 10 kΩ...
- Page 30 HD750 AN8814SB = 25°C (continued) Electrical Characteristics at T • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Unit Thermal protection circuit °C...
- Page 31 HD750 ® ® 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-...
- Page 32 HD750 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...
- Page 33 HD750 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.
- Page 34 HD750 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 35 HD750 MCU Pin Arrangement and Functions Pin Arrangement VFD.DO MCLK VFD.DI MDATA VFD.CLK VFD.LAT SENSE FLOCK TLOCK SQCK REMOTE SUBQ DMUTE STAT XRST PUSW CDRW Figure 1.2 Pin Arrangement...
- Page 36 HD750 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...
- Page 37 HD750 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...
- Page 38 HD750 AMUTE System mute control; 0V = mute No connection No connection No connection No connection 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...
- Page 39 HD750 PNP/NPN Epitaxial Planar Silicon Transistors 2SA1391/2SC3382 Low Noise AF Amp Applications Features Package Dimensions · Adoption of FBET process. unit:mm · AF amp. 2003A · Low-noise use. [2SA1391/2SC3382] Noise Test Circuit JEDEC : TO-92 B : Base ( ) : 2SA1391...
- Page 40 HD750...
- Page 41 MAINBOARD ASSEMBLY Reference Part Number Description Quality 9475-001000-011 HD750 MAIN BOARD ASSY REV A Resistor 1001-000314-020 CARBON FILM RESISTOR 10 OHM 1/4W +-5% AXIAL TAPE 1001-000316-020 CARBON FILM RESISTOR 10 OHM 1/6W +-5% AXIAL TAPE R41, R60, R61, R62, R76, R77,...
- Page 42 HD750 R38, R103 1019-103018-020 METAL FILM RESISTOR 91K OHM 1/8W +-1% AXIAL TAPE Capacitor C172 1100-101043-000 CERAMIC CAP. 100PF/50V +-10% C51, C61 1100-102043-000 CERAMIC CAP. 1000PF/50V +-10% 1100-103043-000 CERAMIC CAP. 0.01uF/50V +-10% C2,C3,C5,C14,C15,C18,C23, 1100-104044-000 CERAMIC CAP. 0.1uF/50V +-20% C24,C27,C28,C34,C42,C48,C53, C54,C55,C57,C59,C63,C65,C73,...
- Page 43 I.C. LTV817B LITON 4188-140102-000 I.C. AN8814SB SMT 28PIN MOTOR DRIVER (PANASONIC) 4201-750000-600 I.C. CD MCU 750-3 HD6433642RB47H PCB, Misc 4875-010010-002 HD750 MAIN PC BOARD REV B 4031-004000-000 FUSE CLIP FOR 5X20MM HF-004/P IC10, IC11 6501-010001-000 HEAT SINK IC9, U3 6575-010004-000...
- Page 44 SHIELD PLATE PHONE PCB 6600-070003-000 CD90R05 RUBBER PAD,LEG POWER SWITCH BOARD ASSEMBLY Reference Part Number Description Quality 9475-001000-111 HD750 POWER CONTROL BOARD ASSY REV A Connector, Switch CON1 2300-005000-000 STRAIGHT CONN. WAFER 5 PINS 2mmP S841 2400-020200-000 TACT SW 2P2T KPT-1105A (5MM) D841...
- Page 45 SOLDER PLATE 10015-5 YUET CHUNG 4081-000000-008 INSULATION SHEET PVC 50X15X0.5MM (HD750) 5110-362000-000 LASER PICK UP LABEL 5110-750100-000 LVD WARNING LABEL ENG VR FOR HD750 54X28 6021-200708-001 YN21Z R. F. PULLEY HOLDER 6029-010012-001-01 PLASTIC FOOT (HOT STAMPING) 6075-010002-000-01 CD DOOR, PAINTED...
- Page 46 E.P.E. SHEET P-EP500160-05 HD750 REMOTE UNIT PARTLIST REMOTE UNIT MECHANICAL PARTLIST Part Number Description Quality 9805-020075-001 REMOTE UNIT (RT-02) 28 KEYS FOR HD750 REV A 5200-080250-030 POLYBAG 80X250X3C MM 6002-000001-000-18 HK HD750 RT-02 TOP CASE (W SILKSCREEN) 6002-000002-000 RT02-P002 CASE BOTTOM...
- Page 47 SCREW M2X8 P TYPE P/H BLK REMOTE CONTROL BOARD ASSEMBLY Reference Part Number Description Quality 9475-001000-081 HD750 REMOTE CONTROL BOARD ASSY REV A Resistor R2, R3, R4, R5 1001-004316-000 CARBON FILM RESISTOR 100K OHM 1/6 W +-5% 1001-507314-000 CARBON FILM RESISTOR 1.5 OHM 1/4W +-5%...
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