SAMSUNG SC_148BE Service Manual

Model:SC-148B

CONTENTS

CD-ROM

service

manual

• Specifications

• Cautions at Service

• External Part Name

• Disassembly Method

• Exploded Views & Part List

• Packing Options

• Operational Position Diagram

• Block Diagram

• Troubleshooting

• Circuit Diagram

•

Main Components Block Diagram & Pin
Descriptions

• Electrical Parts List

The design and part of this product is subject to change without prior notice for performance improvement.

©

Samsung Electronics Co., Ltd.

MAY, 1999

Printed in Korea

Code No.: BG68-00112A

Electronics

Specifications

1. General Specifications

- Drive type : Computer built-in

- Power consumption : DC + 5V, 1.7A
DC + 12V, 1.0A

- Dimensions : 149mm(W)X42.5mm(H)X200mm(L)

- Net Weight : 950g

2. Electrical Features

- Interface : ATAPI BUS(IDE)

-

Data transfer rate 7200KByte/Sec MAX
(5400KByte/Sec AVG.)

- ACCESS TIME: 1/3 stroke : Below 100msec

full stroke : Below 180msec

- Buffer Capacity : 128Kbyte

- Error ratio : Mode 1: Below 10

Mode 2: Below 10

-12

-9

- Frequency response : 20Hz~20KHz (Limeout)
100Hz~20KHz (H/pout)

- Signal to noise ratio : 75dB(1KHz, Limeout)

65dB(1KHz, H/pout)

- Distortion factor : 0.15%Less than(1KHz)

- Channel separation : 65dB(1KHz, Limeout)

55dB(1KHz, H/pout)

- Signal output level :

- Used laser : Semiconductor laser

LINEOUT : 0.7 Vrms(±20%)

H/PHONE:0.6 Vrms(±20%)

Cautions at Service

1. General Items

1) Be careful not to have your eyes or a part of body touch
with laser diode at repair because this product uses laser
diode.

2) Do not disassemble Pick-up at repair. If the laser diode is
bad, replace the entire Pick-up.

3) Keep away from TV or other electrical units at

repair to prevent influence from surrounding units.

4) If you replace the parts during repair, be sure to unplug
the power cable before replacement.

5) If you insert a disc into the drive, be sure to load it
correctly.

6)Because this unit can't be used by itself, surely

mount it on PC (486 DMA support) and check the
operations in use of private device driver floppy
diskette. Refer to Instruction manual.

7)This unit has many parts with features related to

safety and especially, for essential parts, the
importance is indicated on circuit diagram and
part list.
Be certain to use the parts with same specifications at
replacing these parts.

2.

- Because the laser diode in optical Pick-up is subject

1)Body earthing(hand) : Be sure to wear a wrist strip

2) Work table earthing : Put the earthed conductive plate

3)Cautions for clothes : Do not have any clothes

Earthing cautions at handling Pick-up

to get out of order due to the potential difference
occurring by electricity load charged in clothes or
bodies, observe the following earthing items at
handling.

with one side earthed.(Impedance : Below 104).
It removes the electricity formed in body.

(Impedance : Below 104) such as copper plate
on work table.

touch with Pick-up because the electricity formed in
clothes is destroyed easily.

1

Main Components Block Diagram and Pin Descrition

TA2143FN(I.C-RF)

28

PIN DESCRIPTIONS

PIN NO PIN NAME FUNCTION

1 VCC POWER SOURCE/VOLTAGE TERMINAL
2 RFGC RF FREQUENCY CONTROL SIGNAL INPUT TERMINAL
3 RPBW SEL TERMINAL COMBINATIAU DETELTOR CONTROL TERMINAL

RPBW SEL FC [kHz]
L / HiZ L / HiZ 100

L / HiZ L / HiZ 400

L / HiZ L / HiZ 800
4 FNI MAIN BEAM AMP INPUT TERMINAL
5 FPI MAIN BEAM AMP INPUT TERMINAL
6 TPI SUB BEAM AMP INPUT TERMINAL
7 TNI SUB BEAM AMP INPUT TERMINAL
8 MDI MONITOR PHOTO-DIODE AMP INPUT TERMINAL
9 LDO LASER DIODE AMP OUTPUT TERMINAL
10 SEL APC CIRCHIT ON/OFF SIGNAL, LDO TERMINAL CONTROL INPUT TERMINAL.

BOTTOM/PEAK FREGUENCY SWITCH TERMINAL

SEL LEVEL APC CIRCUIT LDO

GND OFF 100
HiZ ON CONTROL SIGNAL OUTPUT

VDD ON CONTROL SIGNAL OUTPUT
11 TEB TRACKING ERROR BALANCE CONTROL SIGNAL INPUT TERMINAL
12 VRO STANDARD VOLTAGE OUTPUT TERMINAL VCC=5.0V VRD=2.1V
13 TEN TRACKING ERROR SIGNAL GENERATING AMP REVERSE INPUT TERMINAL
14 TEO TRACKING ERROR SIGNAL GENERATING AMP OUTPUT TERMINAL
15 SBAD SUB BEAM ADDITIONAL SIGNAL OUTPUT TERMINAL
16 FEO FOCUS ERROR SIGNAL GENERATING AMP OUTPUT TERMINAL
17 FEN FOCUS ERROR SIGNAL GENERATING AMP REVERSE INPUT TERMINAL
18 VDDIN VDD INPUT TERMINAL
19 VREF STANDARD VOLTAGE(VREF)OUTPUT TERMINAL VDDIN=3.6[V] VREF=1.80[V]
20 RFRP SIGNAL GENERATING AMP OUTPUT TERMINAL FOR TRACK COUNTER
21 BTC RECT SIGNAL GENERATING BOTTOM DETECTOR CONTROL TERMINAL
22 RFCT RFRP SIGNAL CENTER LEVEL OUTPUT TERMINAL
23 PKC RFCT SIGNAL GENERATING PEAK DETECTOR CONTROL TERMINAL
24 RFRPIN SIGNAL GENERATING AMP INPUT TERMINAL FOR TRACK COUNTER
25 RFGO RF SIGNAL AMPLITUDE ADJUSTING AMP OUTPUT TERMINAL
26 GVSW AGC,TE, FE AMP GAIN SWITCH TERMINAL

GVSW LEVEL MODE

GND CD-RW
HIZ NORMAL

VCC NORMAL
27 AGCIN RF SIGNAL AMPLITUDE ADJUSTING AMP INPUT TERMINAL
28 RFO RF SIGNAL GENERATING AMP OUTPUT TERMINAL
29 GND GND TERMINAL
30 RFN2 RF SIGNAL GENERATING AMP INPUT TERMINAL

29

TC9450BF(I.C-DSP)

30

PIN DESCRIPTIONS

NO SYMBOL DESCRIPTIONS NO SYMBOL DESCRIPTIONS

1 VSS3 DIGITAL GND TERMINAL 51 VDD3 DIGITAL +3.3V POWER SOURCE TERMINAL
2 BCK BIT CLOCK OUTPUT TERMINAL (1.4112MHz) 52 SEL APC CIRCUIT ON/OFF SIGNAL OUTPUT TERMINAL
3 AOUT AUDIO DATA OUTPUT TERMINAL 53 FLGA INTERNAL SIGNAL MONITOR OUTER FLAG OUTPUT TERMINAL
4 DOUT DIGITAL OUT OUTPUT TERMINAL 54 FLGB INTERNAL SIGNAL MONITOR OUTER FLAG OUTPUT TERMINAL
5 MBOV BUFFER MEMORY OVER SIGNAL OUTPUT TERMINAL.OVER: H 55 FLGC INTERNAL SIGNAL MONITOR OUTER FLAG OUTPUT TERMINAL
6 IPF COMPLEMENTARY FLAG OUTPUT TERMINAL 56 FLGD INTERNAL SIGNAL MONITOR OUTER FLAG OUTPUT TERMINAL
7 SBOK CRCC RESULT OUTPUT TERMINAL FOR SUBCODE Q DATA 57 VDD3 DIGITAL +3.3V POWER TERMINAL
8 CLCK SUBCODE P-W DATA READ CLOCK INPUT/OUTPUT TERMINAL 58 VSS3 DIGITAL GND TERMINAL
9 VDD3 DIGITAL +3.3V POWER TERMINAL 59 I00 GENERAL I/O TERMINAL
10 VSS5 DIGITAL GND TERMINAL 60 I01 GENERAL I/O TERMINAL
11 DATA SUBCODE P-W DATA OUTPUT TERMINAL 61 I02 GENERAL I/O TERMINAL
12 SFSY PLAY DEVICE FRAME SYNC SIGNAL OUTPUT TERMINAL 62 I03 GENERAL I/O TERMINAL
13 SBSY SUBCODE BLOCKING OUTPUT TERMINAL 63 /DMOUT IO 0,1 OUTPUT MODE SELECT TERMINAL
14 SPCK OUTPUT TERMINAL FOR PROCESS STATUS SIGNAL READ CLOCK 64 /CKSE “X” TAL SELECT TERMINAL
15 SPDA PROCESS STATUSE OUTPUT TERMINAL 65 /DACT DIGITAL/ANALOG CONVERT TEST MODE TERMINAL
16 COFS ERROR CORRECTION CLOCK (7.35 KHz)OUTPUT TERMINAL 66 FGIN CAV GENERATION FG SIGNAL INPUT TERMINAL
17 MONIT LSI INTERNAL SIGNAL MOMITOR TERMINAL 67 TESI01 TEST INPUT TERMINAL
18 VDD5 DIGITAL + 5V POWER TERMINAL 68 TESIN TEST INPUT TERMINAL
19 TESTIOO TEST INPUT TERMINAL 69 TEST0 TEST MODE TERMINAL
20 AWRC ANALOG SIGNAL OUTPUT TERMINAL 70 TEST1 TEST MODE TERMINAL
21 PVDD3 +3.3V POWER TERMINAL FOR PLL-EXCLUSIVELY 71 TEST2 TEST MODE TERMINAL
22 PDOS POSITION GAP SIGNAL OUTPUT TERMINAL OF EFM & PLCK SIGNALS 72 XVSS3 MICOM CLOCK DRIVING CIRCUIT GND TERMINAL
23 PDO POSITION GAP SIGNAL OUTPUT TERMINAL OF EFM & PLCK SIGNALS 73 XI MICOM CLOCK DRIVING CIRCUIT INPUT TERMINAL
24 TMAXS TMAX DETECTION RESULT OUTPUT TERMINAL 74 XO MICOM CLOCK DRIVING CIRCUIT OUTPUT TERMINAL
25 TMAX TMAX DETECTION RESULT OUTPUT TERMINAL 75 XVDD3 MICOM CLOCK DRIVING CIRCUIT +3.3V POWER TERMINAL
26 LPFN AMP REVERSE INPUT TERMINAL FOR LOW-PASS FILTER 76 DVSS3 D/A CONVERT R CHANNEL ANALOG GND TERMINAL
27 LPFO AMP OUTPUT TERMINAL FOR LOW-PASS FILTER 77 RO R CHANNEL DATA OUTPUT TERMINAL
28 PVREF VREF(+1.65V) FOR PLL ONLY 78 DVDD3 DIGITAL/ANALOG CONVERT +3.3V POWER TERMINAL
29 VCOREF VCO CENTER FREQUENCY BASE LEVEL TERMINAL 79 DVR DIGITAL/ANALOG CONVERT BASE VOLTAGE TERMINAL
30 VCOF VCO FILTER TERMINAL 80 LO L CHANNEL DATA OUTPUT TERMINAL
31 AVSS3 ANALOG GNDTERMINAL 81 DVSS3 D/A CONVERT L CHANNEL ANALOG GND TERMINAL
32 SLCO DATA SLICE GENERATING DIGITAL/ANALOG CONVERT OUTPUT TERMINAL 82 TEST3 TEST MODE TERMINAL
33 RFI RF SIGNAL INPUT TERMINAL 83 TEST4 TEST MODE TERMINAL
34 AVDD3 ANALOG +3.3V POWER TERMINAL 84 BUS0 DATA INPUT TERMINAL FOR MICOM INTERFACE
35 RFCT RFRP SIGNAL CENTER LEVEL INPUT TERMINAL 85 BUS1 DATA INPUT TERMINAL FOR MICOM INTERFACE
36 RFZI INPUT TERMINAL FOR RFRO ZERO CROSS 86 BUS2 DATA INPUT TERMINAL FOR MICOM INTERFACE
37 RFRP RF RIPPLE SIGNAL INPUT TERMINAL 87 BUS3 DATA INPUT TERMINAL FOR MICOM INTERFACE
38 FEI FOCUS ERROR SIGNAL INPUT TERMINAL 88 VDD5 DIGITAL 5V POWER SOURCE TERMINAL
39 SBAD SUBBEAM ADDITION SIGNAL INPUT TERMINAL 89 VSS5 DIGITAL GNDTERMINAL
40 TEI TRACKING ERROR SIGNAL INPUT TERMINAL 90 /XRD READ SIGNAL FOR MICOM INTERFACE
41 TEZI TRACKING ERROR ZERO CROSS INPUT TERMINAL 91 /XWR WRITE SIGNAL FOR MICOM INTERFACE
42 FDO FOCUS EQ. OUTPUT TERMINAL 92 /XCM FIRST WORD RECOGNIZE SIGNAL FOR MICOM INTERFACE
43 TRO TRACKING EQ. OUTPUT TERMINAL 93 /XCE MICOM INTERFACE CHIP ENABLE TERMINAL
44 VREF ANALOG-BASED POWER TERMINAL(+1.65V) 94 TEST5 TEST MODE SELECT TERMINAL
45 RFGC RF AMPLITUDE CONTROL SIGNAL OUTPUT TERMINAL 95 /RST RESET INPUT TERMINAL
46 TEBC TRACKING BALANCE CONTROL SIGNAL OUTPUT TERMINAL 96 /HSO PLAY SPEED MODE FLAG OUTPUT TERMINAL
47 FMO FEED EQ. OUTPUT TERMINAL 97 /UHSO PLAY SPEED MODE FLAG OUTPUT TERMINAL
48 FVO SPEED ERROR OR FEED SEARCH OUTPUT TERMINAL 98 /SHSO PLAY SPEED MODE FLAG OUTPUT TERMINAL
49 DMO DISK EQ OUTPUT TERMINAL 99 EMPH EMPHASIS FLAG OUTPUT TERMINAL OF SUBCODE QDATA
50 VSS3 DIGITAL GND TERMINAL 100 LRCK CHANNEL CLOCK (44.1KHz) OUTPUT TERMINAL

31

KS88C4504-12(I.C-MICOM)

32

PIN DESCRIPTIONS

NOORIGIN NAME I/O FUNCTION NO ORIGIN NAME I/O FUNCTION

1 /PM /CE O EXT PROM CHIP ENABLE 41 P1.4 MT1 I PRODUCT TEST PINO
2 /DM /UCS O INTERFACE CHIP SELECT 42 P1.3 MT2 I PRODUCT TEST PIN1
3 /RD7 /URD O INTERFACE CHIP READ 43 P1.2 MT3 I PRODUCT TEST PIN2
4 /WR /UWR O INTERFACE CHIP WRITE 44 P1.2 TRO_SW O TRO CONTROL SWITCH
5 VLD VLD I VOLTAGE LEVEL DETECT 45 P1.0 STEP_P1 O STEP MOTOR ENABLE
6 P5.1/AS N.C. O N.C 46 P0.7/ADC3 0.5Vref O RESET CONTROL
7 P5.0/ N.C. O N.C 47 R0.6/ADC2 FMO I FMO
8 P4.7/CS3 /XCE O DSP CHIP SELECT 48 P0.5/ADC1 /EJECT I EJECT BUTTON
9 P4.6/CS2 /XCM O DSP FIRST COMMAND 49 P0.4/ADC0 /PLAY I N.C
10 P4.5/CS1 /XRD O DSP READ 50 AVREF AVREF I ADC REFERENCE VOLTAGE
11 P4.4/CS0 /XWR I/O DSP WRITE 51 P0.3 SLEEP_SW O SELLP MODE CONTROL
12 VDD1 VDD I VCC 52 VSS2 VSS2 I VSS2
13 VSS1 VSS I GND 53 VDD2 VDD2 I VDD2
14 Xout Xout O CRYSTAL OUTPUT 54 P0.2 EMPHA O
15 Xin Xin I CRYSTAL INPUT 55 P0.1 /XRST O OUTPUT DEVICE RESET
16 VPP/EA EA I ADDRESSING MODE SELECT 56 P0.0 LED_BUSY O LED BUSY CONTROL
17 P4.3 BUS3 I/O DSP COMMAND BUS3 57 D0 D0 I EXT PROM DATA0
18 P4.2 BUS2 I/O DSP COMMAND BUS2 58 D1 D1 I EXT PROM DATA1
19 /RESET /RESET I MICOM RESET 59 D2 D2 I EXT PROM DATA2
20 P4.1 BUS1 I/O DSP COMMAND BUS1 60 D3 D3 I EXT PROM DATA3
21 P4.0 BUS0 I/O DSP COMMAND BUS0 61 D4 D4 I EXT PROM DATA4
22 PWM1 PWM1 O PWM CONTROL 62 D5 D5 I EXT PROM DATA5
23 PWM0 PWM0 O PWM CONTROL 63 D6 D6 I EXT PROM DATA6
24 P3.5 CENT O DRIVE IC RESET 64 D7 D7 I EXT PROM DATA7
25 P3.4 CENT O CENTER SERVO CONTROL 65 A0 A0 O EXT PROM ADDRESS 0
26 P3.3 SPM_FG I SPINDLE MOTOR CONTROL 66 A1 A1 O EXT PROM ADDRESS 1
27 P3.2 SPIN_CTL O CPINDLE BRAKE CONTROL 67 A2 A2 O EXT PROM ADDRESS 2
28 P3.1 /OPEN I OPEN LIMIT SWITCH 68 A3 A3 O EXT PROM ADDRESS 3
29 P3.0 /CLOSE I CLOSE LIMIT SWITCH 69 A4 A4 O EXT PROM ADDRESS 4
30 P2.7/INT7 RF_CON O PLL CONTROL 70 A5 A5 O EXT PROM ADDRESS 5
31 P2.6/INT6 N.C. I/O N.C 71 A6 A6 O EXT PROM ADDRESS 6
32 P2.5/INT5 /SCOR I DSP SYNC INTERRUPT 72 A7 A7 O EXT PROM ADDRESS 7
33 P2.4/INT4 TR_OUT O TRAY OPEN CONTROL 73 A8 A8 O EXT PROM ADDRESS 8
34 P2.3/INT3 TR_IN O TRAY CLOSE CONTROL 74 A9 A9 O EXT PROM ADDRESS 9
35 P2.2/INT2 D_INT I ROM DECODER INTERRUPT 75 A10 A10 O EXT PROM ADDRESS 10
36 P2.1/INT1 FLGC I FOCUS O.K. 76 A11 A11 O EXT PROM ADDRESS 11
37 P2.0/INT0 FLGA I TRACKING EPROR ZERO 77 A12 A12 O EXT PROM ADDRESS 12
38 P1.7 MON O SPINDLE MOTOR ON/OFF 78 A13 A13 O EXT PROM ADDRESS 13
39 P1.6 SPM_DIR I N.C 79 A14 A14 O EXT PROM ADDRESS 14
40 P1.5 AMUTE O AUDIO MUTE CONTROL 80 A15 A15 O EXT PROM ADDRESS 15

AUDIO EMPHASIS CONTROL

33

TC9474FA(I.C-DECODER)

34

PIN DESCRIPTIONS

NO SYMBOL DESCRIPTIONS NO SYMBOL DESCRIPTIONS

1 MA4 MICOM ADDRESS INPUT 51 VDD POWER SOURCE TERMINAL
2 MA5 MICOM ADDRESS INPUT 52 VDD POWER SOURCE TERMINAL
3 MA6 MICOM ADDRESS INPUT 53 VSS GROUND TERMINAL
4 MRD MICOM READ SIGNAL INPUT 54 TEST0 TEST TERMINAL
5 MWR MICOM WRITE SIGNAL INPUT 55 TEST1 TEST TERMINAL
6 MCE CHIP ENABLE SIGNAL INPUT 56 TB2 TEST TERMINAL
7 MINT INTERRUPT REQUEST OUTPUT 57 TB3 TEST TERMINAL
8 TESTOUT TEST OUTPUT 58 TB4 TEST TERMINAL
9 RST RESET TERMINAL 59 TB5 TEST TERMINAL
10 VDD POWER SOURCE TERMINAL 60 TB6 TEST TERMINAL
11 HD7 HOST DATA INPUT 61 TB7 TEST TERMINAL
12 HD8 HOST DATA INPUT 62 TB8 TEST TERMINAL
13 HD6 HOST DATA INPUT 63 VPB GROUND TERMINAL (DRAM AREA)
14 HD9 HOST DATA INPUT 64 TB9 TEST TERMINAL
15 VSS GROUND TERMINAL 65 TB10 TEST TERMINAL
16 HD5 HOST DATA INPUT 66 TB11 TEST TERMINAL
17 HD10 HOST DATA INPUT 67 TB12 TEST TERMINAL
18 HD4 HOST DATA INPUT 68 TB13 TEST TERMINAL
19 HD11 HOST DATA INPUT 69 TB14 TEST TERMINAL
20 VSS GROUND TERMINAL 70 TEST2 TEST TERMINAL
21 HD3 HOST DATA INPUT 71 TEST3 TEST TERMINAL
22 HD12 HOST DATA INPUT 72 VDDM POWER SOURCE TERMINAL
23 HD2 HOST DATA INPUT 73 VSSM GROUND TERMINAL
24 HD13 HOST DATA INPUT 74 ACHCK LRCK OUTPUT FOR DAC ON FAST PLAY
25 VSS GROUND TERMINAL 75 AZCK BASE CLOCK INPUT ON FAST PLAY
26 HD1 HOST DATA INPUT 76 SBSY SUBCODE BLOCK SYNC OUTPUT
27 HD14 HOST DATA INPUT 77 SFSY SUBCODE DATA SYNC FRAME INPUT
28 HD0 HOST DATA INPUT 78 SBDI SUBCODE DATA INPUT
29 HD15 HOST DATA INPUT 79 CLCK SUBCODE DATA CLOCK OUTPUT
30 VSS GROUND TERMINAL 80 C2PI DATA CORRECTION FLAG INPUT
31 HDRQ DATA REQUEST TERMINAL 81 LRCK CHANNEL CLOCK INPUT
32 HWR HOST WRITE SIGNAL INPUT 82 DAI DATA SIGNAL INPUT
33 HRD HOST READ SIGNAL INPUT 83 BCKI BIT CLOCK INPUT
34 IORDY IO TRANSFER READY OUTPUT 84 VSS GROUND TERMINAL
35 VSS GROUND TERMINAL 85 XI MASTER CLOCK I/O
36 CSEL CABLE SELECT INPUT 86 XO MASTER CLOCK I/O
37 HDAK DATA ACKNOWLEDGE INPUT 87 VDD POWER SOURCE TERMINAL
38 INTRQ INTERRUPT SIGNAL OUTPUT 88 MD0 MICOM DATA I/O
39 IOCS16 DATA BIT WIDE SELECT OUTPUT 89 MD1 MICOM DATA I/O
40 VSS GROUND TERMINAL 90 MD2 MICOM DATA I/O
41 HA1 HOST ADDRESS 1 INPUT 91 MD3 MICOM DATA I/O
42 PDIAG POST DIAGNOSTIC I/O 92 MD4 MICOM DATA I/O
43 HA0 HOST ADDRESS 0 INPUT 93 MD5 MICOM DATA I/O
44 HA2 HOST ADDRESS 2 INPUT 94 MD6 MICOM DATA I/O
45 HCS1 CHIP SELECT 1 INPUT 95 MD7 MICOM DATA I/O
46 HCS3 CHIP SELECT 3 INPUT 96 VSS GROUND TERMINAL
47 VSS GROUND TERMINAL 97 MA0 MICOM ADDRESS INPUT
48 DASP DRIVE ACTIVE OUTPUT 98 MA1 MICOM ADDRESS INPUT
49 ADA DATA OUTPUT FOR DAC ON FAST PLAY 99 MA2 MICOM ADDRESS INPUT
50 ABCK BCK OUTPUT FOR DAC ON FAST PLAY 100 MA3 MICOM ADDRESS INPUT

35

TA8493AF(I.C-DRIVE)

36

7S32(I.C-OR GATE)

4S66F(I.C-SWITCH)

PQ20WZ51(I.C-REGULATOR)

DAP202K(DIODE ARRAY)

Pin No Pin Name

①
➁

DC input(VIN)
ON/OFF control
terminal(VC)

➂ DC output(VO)

Output voltage minute

➃

adjustment
terminal(VADJ)

➄ GND

37

29EE512-70(I.C-FLASH MEMORY)

- PIN DESCRIPTION
Symbol Pin Name Functions

A15-A7 Row Address Inputs To provide memory addresses. Row addresses define a page for a

write cycle.
A6-A0 Column Address InputsColumn Addresses are toggled to load page data.
DQ7-DQ0Data Input/output To output data during read cycles and receive input data during

write cycles. Data is internally latched during a write cycle. The

outputs are in tri-state when OE# or CE# is high.
OE# Chip Enable To activate the device when CE# is low.
OE# Output Enable To gate the data output buffers.
WE# Write Enable To control the write operations
Vcc Power Supply To provide 5-volt supply(±10%)
Vss Ground
NC No Connection Unconnected pins.

BH3541F(I.C-H/P AMP)

38

M56788FP(I.C-DRIVE)

- PIN DESCRIPTION

Terminal Symbol Terminal function Terminal Symbol Terminal function

1
2
3
4
5
6

7 11

,
8
9

10
12
13
14
15
16
17
18
19
20
21

CH3IN CH3 non-inverted input VREF0 Reference voltage output

OUT3 E3 amplifier output VREF Reference voltage input

IN3- E3 amplifier inverted input SS.GND Small signal GND

VBS2 Bootstrap power supply MUTE2 CH5 mute

Vm2 Motor power supply MUTE1 CH1-4mute

N.C N.C IN2+

GND Motor GND IN2- E2 amplifier inverted input

IN3+

E3 amplifier non-inverted input

VM3(-) CH3 inverted output OUT2 E2 amplifier output
VM3(+) CH3 non-inverted output VM2(-) CH2 inverted output
VM4(+) CH4 non-inverted output VM2(+) CH2 non-inverted output

VM4(-) CH4 inverted output VM1(+) CH1non-inverted output
VM5(+) CH5 non-inverted output VM1(-) CH1 inverted output

VM5(-) CH5 inverted output OUT1 E1 amplifier ouptut

OUT5 E5 amplifier output IN1- E1 amplifier inverted input

IN5- E5 amplifier inverted input Vm1 Motor power supply
IN5+
IN4+

E5 amplifier non-inverted input
E4 amplifier non-inverted input

IN4- E4 amplifier inverted input REGB

OUT4 E4 amplifier output REG+

22
23
24
25
26
27
28

29 33

,

30
31
32
34
35
36
37
38
39
40
41
42

E2 amplifier non-inverted input

GND Motor GND

VBS1 Bootstrap power supply
IN1+

E1 amplifier non-inverted input
Regulator PNP base connect
Regulator voltage setting resistor

39

PIN ASSIGNMENT

TERMINAL TERMINAL FUNCTION REMARKS

NO. SYMBOL

1L

2L

3Laa-phase output terminal Connect to the coil.
4VM2Supply voltage terminal for motor drive
5 SB RUN/STOP control terminal H-:RUN, L:STOP
6RF1Output current detection terminal Sets limiter current value.

7 GND2 GND ­8CRFOutput current filter terminal Connect a capacitor between this

9 N.C

10 FGO FG amplifier output terminal Outputs a signal whose

11 BRK Brake mode select terminal Output mode when VC>V
12 Hb- b-phase negative hall signal input Connect to hall element output

13 Hb+ b-phase positive hall signal input Connect to hall element output

14 Ha- a-phase negative hall signal input Connect to hall element output

15 Ha+ a-phase positive hall signal input Connect to hall element output

16 Hc+ c-phase positive hall signal input Connect to hall element output

17 Hc- a-phase negative hall signal input Connect to hall element output

18 HB Hall element bias terminal Open collector output, Connect to

19 Cd Forward/reverse changeover gain Adjust a rotation direction

20 V

21 V
22 V

23 OSC Triangular wave oscillation terminal Connect a capacitor between

24 GND1 GND ­25 R

26 MS Mode select terminal Determines output mode.
27 LC(G) c-phase upper side power transistor Keep open.

28 L
29 V
30 L

(G) b-phase upper side power transistor Keep open.

b

(G) a-phase upper side power transistor Keep open.

a

CC

C

ref

F2

C

M1

b

(base)output terminal

(base)output terminal

Connect to VM1externally.

Connect to RF2externally and
between this terminal and GND.

terminal and GND.

frequency is determined by the
CD rotation frequency.

terminal terminal.

terminal terminal.

terminal terminal.

terminal terminal.

terminal terminal.

terminal terminal.

the negative side of hall element
bias line.

adjustment terminal changeover gain
Supply voltage terminal for control V
circuits
Control amplifier inputer terminal Use the control signal as input.
Control amplifier reference voltage Use the reference voltage for
input terminal the control amplifier as input.

Output current detection terminal Sets limiter current value.

(base) output terminal
c-phase output terminal Connect to the coil.
Supply voltage terminal for motor drive
b-phase output terminal Connect to the coil.

CC(opr)

the control amplifier as input.

Connect to R
between this terminal and GND.

Connect to VM2externally.

=4.4~5.5V

externally and

F1

ref

40

18

Troubleshooting

+5V, +12V of CN701 is normally inputted

after connection of power cable?

X201, X301, X401 oscillate ?

Check power short and power supply cable

connection state

①

IC201 75pin, IC301 12pin, 54pin IC401 87pin for power input

➁

Check C303, C304, C207, C208, R210, C402, C401soldering

➂

If normal replace X201, X301, X401

IC301 19pin change from 0V to 5V ?

Inputted Voltage of IC301 5pin is 1.5V~2.0V ?

Check R401, R402, R333 Rsoldering

Y

Y

N

N

N

N

N

Input / output IC301 57pi n~80pin,

1pin~4pin

pulse waveform ?

Check IC301 pin soldering

Y

Y

Y

N

In case FLASH ROM Memory of IC301 16pin

0V, and Rom memory inputted 5V ?

Check R320, R321 soldering

Check R301, R302 soldering

Equipments required at repair

1. Oscilloscope(100MHz or more ) 2. PROBE for Oscilloscope(10:1)

3. PC(486 ormore)

Verify the circuit of power unit and the first status(Plug-in the power cable without I/F cable and verify.)

A