Samsung SCR-3232 User manual

Model:SCR-3232
CONTENTS
CD-ROM
service
manual
nSpecifications
nCautions at Service
nExternal Part Name
nDisassembly Method
nExploded Views
nDevice Part List
nPacking Options
nOperational Position Diagram
nCD-ROM Block Diagram
nTroubleshooting
nCircuit Diagram
n Main Components Block Diagram & Pin
Descriptions
nElectrical Parts List
32X
vThe design and part of this product is subject to change without prior notice for performance improvement.

©Samsung Electronics Co., Ltd.
JULY, 1998
Printed in Korea
Electronics

1
nSpecifications
1. General Specifications
- Drive type : Computer built-in
- Power consumption : DC + 5V, 1A
DC + 12V, 1.5A
- Dimensions : 149mm(W)X41.5mm(L)X202.6mm(H)
- Net Weight : 950g
2. Electrical Features
- Interface : ATAPI BUS(IDE)
- Data transfer rate 4800KByte/Sec MAX
(2400KByte/Sec AVG.)
- ACCESS TIME :1/3 stroke : Below 120msec
full stroke : Below 190msec
- Buffer Capacity : 512Kbyte
- Error ratio : Mode 1: Below 10-12
Mode 2: Below 10-9
- Frequency response : 20Hz~20KHz
- Signal to noise ratio : 75dB(1KHz, Lineout)
- Distortion factor : 0.15% Less than(1KHz)
- Channel separation : 65dB(1KHz, Lineout)
- Signal output level : LINEOUT : 0.7 Vrms(±20%)
H/PHONE:0.6 Vrms(±20%)
- Used laser : Semiconductor laser
2. Earthing cautions at handling Pick-up
- Because the laser diode in optical Pick-up is subject 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.
1) Body earthing(hand) : Be sure to wear a wrist strip with
one side earthed.(Impedance : Below 104).
It removes the electricity formed in body.
2) Work table earthing : Put the earthed conductive
plate(Impedance : Below 104) such as copper plate on
work table.
3) Cautions for clothes : Do not have any clothes touch with
Pick-up because the electricity formed in clothes is
destroyed easily.
nCautions 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.

1
nSpecifications
1. General Specifications
- Drive type : Computer built-in
- Power consumption : DC + 5V, 1A
DC + 12V, 1.5A
- Dimensions : 149mm(W)X41.5mm(L)X202.6mm(H)
- Net Weight : 950g
2. Electrical Features
- Interface : ATAPI BUS(IDE)
- Data transfer rate 4800KByte/Sec MAX
(2400KByte/Sec AVG.)
- ACCESS TIME :1/3 stroke : Below 120msec
full stroke : Below 190msec
- Buffer Capacity : 512Kbyte
- Error ratio : Mode 1: Below 10-12
Mode 2: Below 10-9
- Frequency response : 20Hz~20KHz
- Signal to noise ratio : 75dB(1KHz, Lineout)
- Distortion factor : 0.15% Less than(1KHz)
- Channel separation : 65dB(1KHz, Lineout)
- Signal output level : LINEOUT : 0.7 Vrms(±20%)
H/PHONE:0.6 Vrms(±20%)
- Used laser : Semiconductor laser
2. Earthing cautions at handling Pick-up
- Because the laser diode in optical Pick-up is subject 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.
1) Body earthing(hand) : Be sure to wear a wrist strip with
one side earthed.(Impedance : Below 104).
It removes the electricity formed in body.
2) Work table earthing : Put the earthed conductive
plate(Impedance : Below 104) such as copper plate on
work table.
3) Cautions for clothes : Do not have any clothes touch with
Pick-up because the electricity formed in clothes is
destroyed easily.
nCautions 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.

nExternal Part Name
1.Front
2.Rear
32X
Earphone jack
Digital output terminal
(Optional)
Sound output terminal Interface terminal
Master/Slave select pin Power terminal
Up/Down Volume LED Stop/Open button
Play/Search button
Disc tray
2
EmergencyHOLE

nDisassembly Method
1. COVER BOTTOM ASSY disassembly
Remove 4 screws(23) on the bottom of COVER BOTTOM ASSY, lift the back up and disassemble COVER BOTTOM ASSY as
Figure Page 4.
2. COVER-TOP disassembly
After disassembling 4 hooks of FRONT ASSY(2) from COVER TOP(1), pull COVER TOP(1) forward and disassemble it.
3. ASSY DECK+PCB MAIN disassembly
Disassemble FPC PICK-UP(24)and FPC MOTOR(25) connected between assy deck and PCB main, then disassemble between deck
and PCB main.
3

nOperational Position Diagram
7

8

9
nOperational Position Diagram

10

7
nTroubleshooting
+5V, +12V of CN700 is normally inputted after
connection of power cable?
X201, X301, X401 oscillate?
Check power short and power supply cable
connection state
After checking IC201 75pin, IC301 11pin,
IC401 88pin for power input, if normal, replace
X201, X301, X401.
IC308 2pin changes from 0V to 5V?
IC302 6pin changes from 0V to 5V?
IC308 3pin : 0V→5V check
Y
Y
N
N
N
N
N
Y
N
N
N
N
N
N
Disc insert
Replace IC308
Check R314, R330, R305 soldering
Check power input of corresponding
IC and replace it
N
Tray in/out? Refer to ‘Tray open/close’
Y
Y
Y
Laser diode on? Refer to ‘No laser diode on’
Y
Focus up/down? Refer to ‘No focus lock’
Y
Focus lock?
Y
Disc rotates? Refer to ‘No disc rotation’
Y
Pause state
vPause state : LED off as disc rotation state and continue 1 track jump
Y
Spindle lock?
Y
Pick up moves in at power on after moving
out? Refer to ‘No sled operation’
IC302 3pin changes
from 5V to 0V when
power supplied?
Y
Check and
replace IC302
power
Y
Y
N
Is 3.3V supplied at IC202 4PIN?
IC202 surround circuits
R515, R514 check.
Is 3.3V sanctioned at IC201
DSPVCC terminal?
0V→5V changes at checking IC302 6pin
waveform while opening IC301 64pin and
IC401 9pin in turn
13
Equipments required at repair
1. Oscilloscope(100MHz and more) 2. PROBE for Oscilloscope(10:1)
3. PC(486 and more)
Verify the circuit of power unit and the first status(Plug-in the power cable without I/F cable and verify.)
TE signal at 1 track jump
N

8
No tray open/close
FPC is normally inserted in CN502? Retest after inserting FPC in CN502 properly
Start
N
Check SW301 pattern and soldering
vFPC : Flexible Printed Circuit
Replace SW301
After FPC short check, no error, check SW soldering of deck
FPC of CN502 is normally inserted?
Retest after inserting FPC in CN502 normally
After FPC short check, no error, check SW soldering of deck
FPC of CN502 is normally inserted?
Retest after inserting FPC in CN502 normally
N
NN
IC301 49pin is 0V at pressing SW301?
Y
IC301 35pin is 0V with tray in? CN502 16pin
becomes 0V?
CN502 14pin
becomes 0V?
Check R528,R511,R512 soldering
NN
N
N
IC301 36pin is 0V with tray open?
Check R528,R511,R512 soldering.
Replace IC501Replace IC501
Y
Y
Y
Y
IC501 11pin change from 2.1V to +2V at pressing SW301?
N
N N
N
N
IC501 12pin changes from 2.1V to 2.5V at pressing SW301?
IC501 13pin changes from +6V to +4V, and 14pin
from +6V to +8V, at pressing SW301?
IC501 13pin and 14pin chage each from
6V, 6V, to 8V, 4V at pressing SW301?
Output Voltage of IC501 13Pin is impressed into
SLED Motor (-) and IC501 14Pin(+)?
Check pattern and soldering
between CN501 and IC301
Replace loading Motor.
Y
Y Y
YY
Y
14
OPEN tary repair CLOSE operation repair

9
No laser on
Refer to ‘No tray open/close’
IC101 10pin changes from 0V to +3.3V? Refer to ‘Check power source and initial state’
N
N
IC101 9pin changes from 4.2V to 3.8V? Check IC101 power input and replace.
Y
Open and close tray(Disc insettion)
Y
CN501 3pin changes from 2V to 2.5V? Check D101, L101, Q102, R102, C103 soldering
Y
CN501 2pin changes from 0V to 0.7V? Check Pick-up FPC connection state
N
N
N
Y
Replace pick-up
Y
15

10
No SLED operation
Move pick-up out.
Insert 2 FPC and power cord.
SLED runs normally.
Y
Pick-up moves in?
The below waveform is outputted in
IC201 47Pin?
N
Refer to 'Check power source and initial state'
N
Voltage of IC501 21pin in 12V? Check R511, R512
soldering.
After checking IC501
soldering, no error, replace IC
NY
N
N
16
The below signal is inputted
in SLED MOTOR - terminal?
Y
The below signal is inputted
in SLED Motor + terminal?
Y
Replace SLED Motor.
Y

No focus lock
Insert disc
Laser diode is on?
VNOTE : NEVER CHECK 'LASER DIODE
ON' STATE DIRECTLY WITH YOUR EYES
AND RECOGNIZE IT BY SIGNAL
INDICATED IN 'NO LASER DIODE ON' OF
THIS MANUAL.
Focus up/down? The below waveform is outputted in IC201
42Pin?
17 18
Refer to 'Check power source
and initial state'
Check IC501 power input, soldering and
R506, R507, R505, R201, C216 soldering.
Replace FPC.
Y
Y
Y
Y
N
NN
Y
Refer to 'No laser diode on'
N
Check IC101 power input, soldering and
R116 soldering.
N
Replace IC101
Check IC101 power input and soldering.
N
N
N
The below waveform is inputted in CN501
17Pin?
Y
Y
FE signals is outputted in IC101 16Pin?
Y
The below waveform is outputted in IC101
15Pin?
Y
Check IC201 power input and soldering.
Y
X201 oscillates?
Y
Check power source and initial state.
The below waveform is inputted in CN501
14Pin?
Y
Pick-up connecting FPC is connected?
Replace Pick-up.
Y

11
No spindle motor rotation
Focus lock? Refer to 'No focus lock'
N
N
N
N
N
N
The side waveform is inputted in
IC502 2Pin?
Check IC201 power input and 49Pin soldering.
Check R207, C221 soldering and pattern
Replace IC201
Check R518 soldering
The below waveform is
inputted in IC502 21Pin?
CN502 8Pin is 3V?
Insert disc.
Y
Y
Y
Y
Y
Y
Y
Spindle motor kick signal
Check R519 soldering
CN502 1Pin is 2V?
Replace spindle Motor
Spindle Motor FPC is connected?
Replace IC502
Y
19

1220
No audio output
Focus lock? Refer to 'No focus lock'
N
Insert audio disc.
Y
Y
Spindle Motor rotates? Refer to 'No Spindle Motor rotation'
N
Y
IC301 50Pin is 0V at pressing SW302? Solder SW302
N
Y
Audio signal is outputted in
IC201 77, 80Pin?
Check IC201 power and soldering.
N
Replace IC201
N
Y
Audio signal is outputted in
IC701 1, 7Pin?
Check IC701 power input and
peripheral integer VR soldering.
N
Replace IC701
N
Y
Audio signal is outputted in JK 701 Check L702, L701 soldering
N

21
When installing is impossible
Does INSTALL message appear? Normal
N
Connect power and I/F cable between
PC and CD-ROM
Y
Do the digital signal of IC301 and IC306
communication pattern change from 0V to
5V?
Check the soldering of IC402, IC301
and pattern open/short
N
N
Y
Do the digital signals of IC301 and IC401
communication pattern change from 0V to
5V?
Check the soldering of IC401, IC301
and pattern open/short
N
Y
Y
Is there soldering between the pattern of
IC401 and CN701
Check the soldering of Damping
Resister and IC, I/F Wafer
N
Resoldering
Y
Is IC301 64PIN 5V when main power
turns on?
Check main power-end and initial state
N
Does X301 oscillate? Check soldering of C303, C304
Y
Y
Is IC201 95PIN 5V? N
Y

6
nPacking Options
NO
1
2
3
4
5
6
7
8
9
CODE NO.
BG69-50015A
BG69-20003A
BE69-30304A
BG46-30001J
BG39-40010A
BE69-30304A
BG68-10010A
BG68-10011A
BG39-30002A
PARTS
BOX SYSTEM
CUSHION-SET
PE-BAG
INSTALL-DISK
CBF-HARNESS
PE-BAG
MANUAL-USERS
MANUAL-USERS
CABLE-IF
SET
SPECIFICATION
SW-E MANILA 400g
EPE WHITE
T0.1X270X260 ANTI
SHARED W/ SCR-3230
4P, 500mm
T0.1X270X260 ANTI
CD-ROM(Korean)
CD-ROM(Eng/Ger)
40 Pin I/F Cable
SCR-3232
COUNT
1
2
1
1
1
1
1
1
1
1
REMARK
32X

2636
NO CODE NO PARTS SPEC LOCATION NO Q’TY
1 0903-000006 IC-MICRO CONTROLLER KS88C4400 IC301 1
2 1102-001024 PROM AT27C512R IC306 1
3 1201-001231 RF-AMP TA2119FN IC101 1
4 BG14-10001H IC SIGNAL PROCESSOR TC9450F IC201 1
5 0904-001237 IC-CONTROLLER TC9466FA IC401 1
6 1003-001068 IC MOTOR DRIVER BA6849FP IC502 1
7 1003-001130 IC 4-CH DRIVER KA3012D IC501 1
8 1203-001005 IC-VOLTAGE DETECTOR XC61AC3502M IC308 1
9 1203-001473 IC-VOLTAGE REGULATOR PQ20WZ51 IC202 1
10 0801-002353 IC-CMOS LOGIC 74VHCT00 IC302 1
11 0803-000605 IC-TTL LOGIC 74LS374 IC305 1
12 1201-000003 IC-AMPLIFIER 3414A IC701 1
IC
R-CHIP-1
NO CODE NO PARTS SPEC LOCATION NO Q’TY
1 2007-000070 R-CHIP 0 ohm R108,109,124,208,275,307,314,327,501,817,C 12
206,L101
2 2007-000036 R-CHIP 2 ohm R520,521,522,523 4
3 2007-000882 R-CHIP 4.7 ohm R211 1
4 2007-001442 R-CHIP 10 ohm R102 1
5 2007-000071 R-CHIP 22 ohm R402,403,406,408,409,416,417,418,419, 21
420,421,422,423,424,425,426,427,428,
429,430,431
2007-000115 R-CHIP 82 ohm R404,405,407,410,411,412,413,414 8
6 2007-000074 R-CHIP 100 ohm R309,310 2
7 2007-000116 R-CHIP 120 ohm R308 1
8 2007-000075 R-CHIP 220 ohm R101,103,518,519 4
9 2007-000763 R-CHIP 330 ohm R135, 303 2
10 2007-000077 R-CHIP 470 ohm R330 1
11 2007-000119 R-CHIP 560 ohm R614 1
12 2007-000078 R-CHIP 1 Kohm R117,119,123,201,202,326,703,705,706,708, 12
715,720
13 2007-000122 R-CHIP 1.2 Kohm R436 1
14 2007-000080 R-CHIP 2 Kohm R615 1
15 2007-000124 R-CHIP 2.2 Kohm R532,533,733,734 4
16 2007-000662 R-CHIP 2.2 Kohm NR100 1