Sony OA-D32W User manual

MICRO FLOPPYDISK DRIVE
OA-D32W
OA-D32V
SONY
SERVICE MANUAL

Specifications
Capacity
Unformatted Per Disk
Unformatted Per Track
Bu~tTRANSFER RATE
AcctItITlme
Track to Track
Average-
Settling Time
Head Load Time
Average Latency
Functiona'
Rotational Speed
Recording Density (inside track)
Track density
Cylinders
Tracks
R/W Heads
Encoding Method
Heat Dissipation
Operating Mode (Head Load)
Standby mode (Head Unload)
Media Requirements
3.5" x 3.7" (90 mm x 94 mm)
OA·D32W
SI NG LE J DOUBLE
DENSITY DENSITY
500 Kbytes /1.0 Mbytes
3.125 Kbytes 6.25 Kbytes
250 Kbits/sec 500 Kbits/sec
12 msec.
350 msec.
30 msec.
SO msec.
50 msec.
SOO RPM
4359 bpi I 8717 bpi
approx.
135 TPI
80
160
2
FM, MFM
6.0W
3.9W
SONY OM·D4440
OA·D32V
SINGLE I DOUBLE
DENSITY DENSITY
250 Kbytes /500 Kbytes
3.125 Kbytes 6.25 Kbytes
250 Kbiu/sec 500 Kbits/sec
12 msec.
350 msec.
30msec.
SOmsec.
50 msec.
SOO RPM
4094 bpi I 8187 bpi
approx.135 TPI
80
80
1
FM, MFM
S.OW
3.9W
SONY OM·D3440
-Average access time a 1/3 X {Track Nos.l x (Track
to track time) + (Settling Time)
Environmental Consideration.
ReliabilitY and Maintainability
Preventive Maintenance (PM)
Meantime Between Failures (MTBF)
Meantime to Repair (MTTR)
Component Life
Media Life
Disk Interchange
Soft Read Error
Hard Read Error
Seek Error
Not required
8000 POH (Power On Hourtime)
30 min.
5 years
or 15,000 POH
3.0 x 10" passes/traek
20,000 times
1 per 10' bits read
1 per
10" bits read
1 per 10" seeks
Envlronmenta' Limits
Temperature (Operating)
Humidity (Operating)
40· F to 115°F (5°C to 45°C)
Vibration (Opel'8ting)
Dimensional Data
Height
Width
Depth
Weight
2.0 In. (51 mm)
4.0 in. (102 mm)
5.1 in. (130 mm)
1.51bs (S50 g)
DC Power Requirements
20 % to 80 % relative humidity, with a wetbulb temperature of85°F
(29°C) and no condensation.
The unit shall perform all read/write operations (no seek) according
to specifications, with continuous vibration of less than 0.5 G (±10 %)
from 5 Hz to 100 Hz (along the x, y, z plane).
Reading +12.0 V ±5 %
(Operating) +5.0 V ±5 %
0.30 A (typical)
0.48 A (typical)
RECORD OF REVISIONS
REVISION NOTES
1
ORIGINAL ISSUE
-2-
November, 1983

TABLE OF CONTENTS
Description
SECTION 1. INTRODUCTION .••••.••..• \' ..........•..•..•..•..••..•.
SECTION 2. TOOLS AND MEASURING INSTRUMENT.S . . • . • • • . • . . • • . • . . . •. 8
2-1. GENERAL AND SPECIAL TOOL
UST • . • . • • • . . . . . . . • . .. 8
a. General Tools ..••.•..........••..•...•.•.••..•. 8
b. Special Tools. . • • . • • . • . . • . . • • . • . . • . • . • . • . . • . . • .. 8
c. Measuririg Equipment •. ' ..•..• " . . . • • • • • . . • . . . . . • . .• 8
d. Disks .•.••.•.•••.•..•....•.....•............•.
e. Expendable and Chemical Supplies ..•...••.••..••....• 8
2-2. SPECIAL TOOLS
..•..•.............••.....•.. '..... 9
2-2-1.
MFD Checker II . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9
2-2-2. Configuration
of SMC-70 Drive Test System." . • . . . • • . . .. 13
2-2-3. Disks •.••..•................•••.......•..• 14
SECTION 3. TROUBLESHOOTING ..•....•.........••.•..•..•...•.•... IS
3-1. BEFORE TROUBLESHOOTING •.....••...•...•..•..... IS
3-2. TYPES OF ERROR ON A SYSTEM LEVEL ....•.•.••.... IS
3-2-1. Soft Error
...•.....•.........•.•............ IS
3-2-2. Write Error •................•. : •...•..••• : .. IS
3-2-3. Seek
Error. • . . . . . . . . . . . • . . • . . • . . .. . • . . . . . • •. IS
3-2-4. Interchange Error
•.............•••.•..••.•.... IS
3-3. FAULT DIAGNOSIS BY MFD CHECKER II ............... IS
3-3-1. Normal
Operation. . . . • . . • • . . . . . • • . . . . . . . . • • . .. IS
3-3-2. Check Points to Abnormal Operation •••.•..•..•..•.. 20
3-4. FINAL CHECK .
~ . • . . . . . . • . . . . • . . . • . • • . . . . . . . • . . . •. 23
3-4-1. Setting ofSMC-70
..•.......•.•.•..•..... . ... 23
3-4-2. Set the Check
Area. . • . . • . . • . . • . • • . . • . . • . . • . . •. 23
3-4-3. Check the Drive
Unit. . • • . • . . . . . . . . • . . • . . • . • . • .. 25
3-4-4. Error Message ...•...•.........•....•....... ;. 27
SECTION 4. PART REPLACEMENT ., . . . • . . . . . • . . . . . . . . • • . • . . • . . • . . . .. 29
4-1. FC-9/FC-14 MOUNTED BOARD REPLACEMENT .......•..•. 29
4-1-1. Removal
.................•..•.•..•........• 29
4-1-2. Installation and Adjustment
..•.•..•.............• 29
4-2. FRONT PANEL ASS'Y REPLACEMENT
....•..•........•. 29
4-2-1. Removal
.•..•...•.•..........•......•...... 29
4-2-2.
Installation................................. 29
4-3. BLIND PANEL REPLACEMENT
.....•.•......••....•.. 30
4-3-1. Removal
•..•..•.............••..•....•••.•. 30
4-3-2.
Installation................................. 30
-3-

Description
4-4. LED MOUNTED BOARD ASS'Y REPLACEMENT. • • . . • . • . .• 30
4-4-1.
Removal................................... 30
4-4-2.
Installation................................. 30
4-5.
MAIN COVER REPLACEMENT ••••.••.•.•••••••••.•••• 31
3-5·1. Removal ........•.....•.••.•.••••.••.••.•.• 31
3-5·2. Installation................................. 31
_ 4-6. PAD ASS'Y REPLACEMENT •.•••.•.•...•••••.•..••.•• 31
4-6-1. Removal................................... 31
4-6-2. Installation and Adjustment .•.••.••••..••.•..•.•• 31
em 4-7. D.AMPER REPLACEMENT. . • . . • . • • • . • . . • . . • . . • . • • . . .• 31
4-7·1. Removal •.• ; .••.•..•.••.•••.••....••.•....• 31
4-7·2. Installation ..••.•..•..•.. ' ••.••••..•..•..•... 32
4-8. HEAD LOAD ASS'Y REPLACEMENT •.•..••.••.•..••.•. 32
4-8·1. Removal •••...•••.•..•••••••..•..•....•••.. 32
4-8·2. Installation and Adjustment . . • . • . . . • . . . • • . . • . • • •. 32
4-9. CASSETTE·UP ASS'Y REPLACEMENT. • • • . • . . . • . • . . . • . • . 33
4-9·1. Removal •••••••••••.•••.•..•..•.•••.•..•.•• 33
4-9·2. Installation and Adjustment . . • • • . . • . . • . . • . . • . • • •• 33
4-10. WP ARM I D-DETECTION ARM I COMPRESSION SPRING
(3-659·609·00) REPLACEMENT
•.•...•......•.•.•... 34
4-1 ()'1. Removal................................... 34
4-1()'2. Installation and Adjustment .•••.•.•••...••.••.••. 34
4-11. DC DISK DRIVE MOTOR (BHC·2101A) REPLACEMENT ...•• 34
4-11·1. Removal •...•.•.•••.••.•••••...•••.•..••.•. 34
4-11·2. Installation and Adjustment ....•...•.••.••.••.•.. 35
4-12. SENSOR MOUNTED BOARD REPLACEMENT' .•••••.••.... 35
4-12·1. Removal................................... 35
4-12·2. Installation and Adjustment •.•.••..•.•••.••••..•• 35
4-13. LEAD SCREW ASS'Y (STEPPING MOTOR I LEAD SCREW I
COUPUNG ASS'Y I COMPRESSION SPRING
(4-601·083-00» REPLACEMENT
•••....••..••••.•••. 36
4-13-1. Removal .•••.•••.•••.••.••.•..•..••••.••••. 36
4-13-2. Installation and Adjustment .••.• : •.••.•..••..•••• 36
4-14. (32V) HEAD ARM ASS'Y REPLACEMENT,
(32W) HEAD CARRIAGE ASS'Y REPLACEMENT. . • • • • . • • •. 37
4-14-1. Removal................................... 37
4-14-2. Installation and Adjustment .•.••.•.....•••.•.•••• 38
-4-

Description
SECTION 5. CHECK AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 39
5-1.
LEAD SCREW ECCENTRICITY ••..•••••••..••...•••••• 39
5-1-1. Tools and Measuring Equipment ••••••••••..••.•• " 39
5-1-2. Measurement ••••..••• ' •..•..•••••••..•..•.••• 39
5-1-3. Adjustment ••••••.•••••.•..••••••••.••.••••• 39
_ 5-2. PAD PRESSURE. • . • • . . • . • • • • • • • • . . • • . • • . • . . • • • • • •• 39
5-2-1. Tools and Measuring Equipment .••.••.•.•••••.•••• 39
5-2-2. Measurement. . . • . . • • . • . . . . • • • • • . . • • . • • . • . . •• 39
5-2-3. Adjustment •...•••••••.•.•...•••.•.•..••..•• 40
5-3. HEAD COMPUANCE •••••••••.•••.•..•...•....•.••. 40
5-3-1. Tools and Measuring Equipment _
.•..••.••.• : •••.•• 40
5-3-2. Measurement
.•••.••••..•....•.• ~ • . • • • . • • • • •• 40
5-3-3.
Adjustment............. • . • • . . • • • . • • . . • . . • .. 41
5-4. RADIAL AUGNMENT AND TRK 00 SENSOR .••.. ,. . • . . •. 42
5-4-1. Tools and Measuring Equipment •••.••••..•....•••. 42
5-4-2. Measurement. • • . . • • . • • • • . . . • . • • . • . . . . . . . . • •• 42
5-4-3. Adjustment .•.••.•••••.•..•.••.••••••....••• 42
5-4-4. Set Up Command , • • • • . . • • • • . • . • • • . . • • . . . • • . .• 42
5-4-5. Measurement Command. • • • • • • . • . . • . . • . . . . . . • . .• 43
5-4-6. Adjustment Command ••.•.•••.•..•...•....... " 44
5-4-7. Error Message .•••.•.•••.••.•••.•......•••.. 46
_ 5-5. STEPPING MOTOR LOAD TORQUE . • . . . • • . • • . . . . . • . • .. 46
5-5-1. Tools and Measurement Equipment . . • • . . . • • • . . • • . •• 46
5-5-2. Measurement...... • • . • • • • • . . . . . • . . • . . . • . • • .• 46
5-5-3. Adjustment .•..••.•.••.•••••. : • • . • • . . . . • . . •. 46
5-6. INDEX PHASE • • • • • • . • • • • • • . • • • • . . • • • • • • • . . • • • . .
.• 47
5-6-1. Tools and Measuring Equipment •..•.•••••..•....•• 47
5-6-2. Measurement •..••.•••••••..•.....••.•...•.•. 47
5-6-3. Adjustment ..•...••.•..•..•..•..•.••...• ',' .. 47
5-7. READ AMPUFIER GAIN
AND READ AMPUFIER
OFF SET
..••••..•.••.••.••..•.••..•.••.....•. 47
5-7-1. Tools and Measuring Equipment •....••.••.•..•..•. 47
5-7-2. Measurement •..••••.••.••.•..••.••••........ 47
5-7-3. Adjustment •..•••••.•..•..•..••.•••••.••.•.. 48
5-8. DISK DRIVE DC'MOTOR SPEED . • . • . . • • . . • • • • • • • • • •
•• 48
5-8-1. Tools and Measuring Equipment . . . . . . . . . . . . . . . . . .. 48
5-8-2. Measurement........... • • • . • . • . . . • • . • • . . • • •. 48
5-8-3. Adjustment •...•.•••••.••.•..•• '. • • • • • . • . . . •. 49
-5-

Description
ED 5·9. HL ARM HEIGHT •.••••.•••.•..••.••••.•••.••••..• 53
5.9.1. Tools and Measuring Equipment •..••.•..••.••.••.• 53
5.9·2. Measurement... • . • . . . . . • . • • • • • . • . . . • • . • • • • •• 53
5·9·3. Adjustment......................... • . • • • • •• 53
5·10. HEAD CLEARANCE •.•.•.•..•.••••••.•..•• " .•••.• , 53
5·10-1. Tools and Measuring Equipment ...••••.••.••.•••.• 53
5·10-2. Measurement................................ 53
5·10-3. Adjustment................................. 53
5·11. HEAD CLEANING
.................................. 54
5·11·1. Tools and Measuring Equipment .................. " 54
ED 5·11·2. Cleaning with Applicator • • . . . • . . . . • • . • . . • . • • • • .. 54
5·11·3. Cleaning with Cleaning Disk ..•••••.•.••.•..••..• 54
SECTION 6. PARTS LOCATION AND LIST (OA·D32W) .••.••.•..•••••.•..• 55
6·1. PARTS ASS'Y LOCATION
•.•.•..•••..••..••.••.••••• 55
6·2. MECHANICAL PARTS LIST
.••..•.•••.•.•••.•..•..•• , 57
6·3. OVER ALL DIAGRAM
.....•.••...•.•••••••••••••. " 59
6-3·1. Interconnection Diagram •.....••••..••.••..••••. 59
6-4. CIRCUIT DIAGRAM . • • • • . . • . . • . . • • • • • • • . . • • . • . • • •
.• 61
6-4·1. Circuit Diagram on FC·9 Mounted Board •..•••••.•.•• 61
6-4-2. Parts Layout on FC·9 Mounted Board •••..•..••••.•• 65
6-4-3. Disk: Motor Circuit Diagram. . • • . • • • • • . • • . • • • • • . •• 67
6-4-4. Parts Layout on Disk Motor Circuit Board. . . • • • • • • • • .• 69
6·5. ELECTRIC PARTS
...•..•..• ; . . . . • • • • • . • . • • • • • • . • •. 70
6-5·1. ChipParts Replacement Procedure. • • • • • . • • • • . • • . •
•• 70
6-5·2. Electric Parts List
•.•.....•..••••...•.••••..•.. 71
SECTION 7. PARTS LOCATION AND LIST (OA·D32V) ••••••••.••••••••..• 75
7·1. PARTS ASS'Y LOCATION
......•..••••.....••.•..•.. 75
7·2. MECHANICAL PARTS LIST
.• , .••.••.•••••.••••••••.• 77
7·3. OVER ALL DIAGRAM
................... ; . • • • • • • . . •. 79
7·3·1. Interconnection Diagram ...•..•..•..••.••••..•... 79
7·4. CIRCUIT DIAGRAM • . • . . • . . • . . • . . • . . • . . • • . • • . • • . •
•. 81
7-4-1. Circuit Diagram on FC·14 Mounted Board .•••••••.•..• 81
7·4-2. Parts Layout on FC·14 Mounted Board •••..•.••.••.•• 85
7·4-3. Disk: Motor Circuit Diagram .••.••..•• . • • • • • • . • . •. 87
7-4-4. Parts Layout on Disk Motor Circuit Board. • . • • • • • . • . .• 89
7·S. ELECTRIC PARTS •.•.••.•...•.•.•.••••.•.••••••.•• 90
7·5·1. Chip Parts Replacement Procedure
•••• ; • . . • . • • • • • • .• 90
7·5·2. Electric Parts List • • . • . . • . . . . • • • . • • . • . • • • • • . • •. 91
SECTION 8. TRANSISTORS I DIODES IICS PIN ARRANGEMENT •• . • • . • • • . • .• 94
-6-

SECTION 1
INTRODUCTION
Introduction
This manual is a maintenance guide forOA·D32W
(Double sided) and OA·D32V (Single sided). The overall check after removals and adjustments will be included in this section.
SECTION 2 describes disks and tools necessary for
maintenance.
SECTION 3 provides fault diagnostic procedures
that may require spare parts or some adjustments.
SECTION 4 and 5 cover parts replacements and
adjustments, respectively.
SECTION 6 and 7 consist of circuit diagrams, ass'y
drawin~s, and parts lists.
The cassette dummy (4-603-929-00) should be inserted in the OA·D32W when it is
transported. Otherwise, its heads may be damaged.
Perform maintenance in accordance with the procedure specified in this manual
as
follows:
(Example)
e. Fasten the guide shaft with the two screws (PSW2.6 x 6).
Em f. Fasten the head board to the chassis on the bottom surface, and apply nut lock
paint
to the screw.
Em g. Connect the head board to the head harness (by four points) with a soldering
iron. (Refer to Fig. 4-14 (c) )
_ h. Connect the head board to the head harness (by six points) with a soldering
iron. (Refer to Fig. 4-14
(d»
_ i. Fasten head board and terminal shield plate with a screw (PSW2.6 x 8) on the
chassis bottm, and then apply
nut lock paint onto it.
E!D j. Perform the stepping motor load torque adjustment. (Refer to 5-5)
k. Install the cassette·up ass'y in place. (Refer to 4-9)
Steps
e, h, i, and k should be carried out in sequence for the OA·D32W.
Steps e, f, g, j and k should be carried out in sequence for the OA·D32V.
-7-

General and Special Tool List
SECTION 2
TOOLS AND MEASURING INSTRUMENTS
2-1. GENERAL AND SPECIAL TOOL LIST
The tools, and measuring instruments for performing
maintenance
on the OA-D32W/OA-D32V are listed below.
a. General Tools
TOTSU Screw Driver (M2.6)
@ Driver 2 mm
e Driver 2 mm
e Driver 4 mm
Tweezers
Round Nose Plier
Adj Rod
Cutter
Soldering Iron (20W)
Desoldering MetalBraid
SONY Parts No.
(7-721:-050-62)
(7-700-749-01)
(7-700-750-01)
(7-700-750-04)
(7-700-753-02)
(7-700-757-01)
(7-700-733-01)
(7-700-75S-02)
DC Power Supplier (+5 V DC i5 %, O.S A max.,
+12 V DC i5 %, 1.5 A max.)
Tester
b. Special Tools
MFD Checker D
SMC-70 System
(J-609-IS2-0A)
SMI-70lll SMI-70llA I SMI-70121 SMI-70l2A
SMC-70
KX-13Gl
'AID Converter
25P/26P Conversion Cable
Radial Alignment System Disk
(OR-DS6VA)
(J-623-002-OA)
(J-623-90l-0A)
(8-960-009-74)
Error Check.system Disk(OR-D87VA)(8-960-009-75)
Rotatory Knob (fOt Stepping Motor) (J-609-01l-0A)
Lead Screw Eccentricity Inspection Tool (J-609-l36-OA)
Standard Disk
Dummy
(for Cassette-Up Ass'y Installation)
Geared Driver
Pad Weight
Hexagon Wrench
Torque Driver
Power Cable
Interface Cable
(J-609-l20-0A)
(J-609-0l7-0A)
(J-609-124-0A)
(J-609-125-0A)
(J-609-l30-0A)
(J-609-200-0A)
c. Measuring Equipment
Oscilloscope DualTrace
20 MHz
Universal Counter Resolution 0.1 msec.
Tension Gauge (Max.
200 g)
Tension Gauge (Max. 20 g)
d. Disks·
Level Disk
lSI OR-D46VA
_ OR-D46WA
Alignment Disk
lSI OR-D47VA
_ OR-D47WA
DynamicInspection Disk +30
lSI OR-DSIVA
_ OR-DSIWA
DynamicInspection Disk - 30
lSI OR-D52VA
_ OR-DS2WA
Cleaning Disk
lSI OR-D29VA
_ OR-D29WA
e. Expendable and Chemical Supplies
Nut Lock Paint
Alcohol
SonyOU
Sony Grease
Bamboo Stick
Applicator
-8-
(J-604-163-OA)
(7-732-050-fO)
(8-960-009-31)
(8-960-009-40)
(8-960-009-32)
(8-960-009-41)
(8-960-009-35)
(8-960-009-44)
(8-960-009-36)
(8-960-009-45)
(8-960-009-15)
(8-960-009-39)
(7-611-0.18-01)
(7-622-001-52)

2-2. SPECIAL TOOLS
2-2-1. MFD Checker D
(1) MFD Checker Dconfiguration
Main Checker Board
I/F Cable (26pin and 34pin)
Power Cable (2 pieces)
Conversion Board (26pins-to-34pins)
NOTE: The Conversion Board and 34pin IIF Cable are
required for
the OA-D33W/OA-D33V.
(2) Micro Floppydisk Drive Connection (Refer to
Fig. 2-,1)
(3) MFD Checker nfunction switches
STEP IN •....... Steps the head inwards.
STEP OUT ....... Steps the head outwards.
The head continously moves
if the switch is
kept pressed.
SIDE SELECT
•... Selects one of two heads
(side 0
or side 1) for a double sided. (This
switch is invalid for single sided versions.)
WRITE
...•....•. Records, data specified by
the OSC SEL switch, onto one track.
OSC SEL ........ Selects such write data as
"2F", "IF", "WCP" (worst case pattern), or
EXT.
Power Cable
Special Tools
WCP W 1M ..•....• Selects upper and lower
patterns when the OSC SEL switch
is set to
WCP. (Refer to Fig. 3-3 (c), (d»
HD LOAD •...... This is used to set the
plunger solenoid active.
M,OTOR ON ...•.. This is used to operate the
Disk Motor.
DRIVE
SELECf ... Selects the disk drive.
The DRIVE
SELECf switch on the disk drive
relates
to the DRIVE SELECf switch on the
checker as follows:
Drive Checker
IS101) 1 2
1
OFF OFF
2 ON
OFF
3
OFF ON
4 ON
ON
CHGRST ........ Resets the DSKCHG
signal.
600/300 SELECf (Located in the middle of the
board) .......... Set the 600/300 SELECf
switch at "600" for the OA-D32WIOA-D32V.
SO/70 SELECf (Located in the middle of the
board)
..•.....•• Set the SO/70 SELECf
switch to "SO" for the OA-D32W/OA-D32V.
Fig. 2-1 Drawing of Connection Between Disk Drive
and
MFD Checker II
-9-

Special Tools
(4) INDICATOR
OSC SEL (Four LEDs in the left of the board)
. . . . . . . . . . • . . . '. They indicate the selected
position on the OSC SEL switch.
IfF signals (Five LEDs in the middle of the
board) .......... They indicate at the states
of TRK 00, WRTPRT, RDY, DSKCHG, and
INDEX, respectively.
The TRK 00, WRTPRT, ROY, and DSKCHG
indicators are lit when the respective IfF sig-
nals are low (true). The INDEX indicator
blinks when the INDEX signal is applied to
the board.
TRACK POSITION (Seven segment LED indi-
cator in the right of the board) •.. ~ ....•.••
Indicates the current track position.
(5) Test Points
TP-I; "M;:::O';;:T:AO-;:::R-'O""N~
TP-2; WRT GATE
TP-3; RD DATA
TP-5; INDEX
TP-6;
STEP
TP-7; ;';H-;:::D:-L~O="A-:-D;::'
The GND terminal: is marked by "GND".
MFD Checker II Block Diagram
-10-"