Sony OA-D32V, OA-D32W Service Manual

MICRO FLOPPYDISK DRIVE

OA-D32W OA-D32V

SONY

SERVICE MANUAL

Specifications

	OA·D32W		OA·D32V
	SI NG LE	J DOUBLE	SINGLE	I	DOUBLE
	DENSITY	DENSITY	DENSITY		DENSITY
Capacity
Unformatted Per Disk	500 Kbytes	/1.0 Mbytes	250 Kbytes	/500 Kbytes
Unformatted Per Track	3.125 Kbytes	6.25 Kbytes	3.125 Kbytes		6.25 Kbytes
Bu~tTRANSFER RATE	250 Kbits/sec	500 Kbits/sec	250 Kbiu/sec		500 Kbits/sec
AcctItITlme
Track to Track	12 msec.		12 msec.
Average-	350 msec.		350 msec.
Settling Time	30 msec.		30msec.
Head Load Time	SO msec.		SOmsec.
Average Latency	50 msec.		50 msec.
Functiona'
Rotational Speed	SOO RPM		SOO RPM
Recording Density (inside track)	4359 bpi	I 8717 bpi	4094 bpi	I	8187 bpi
Track density	approx. 135 TPI		approx.135 TPI
Cylinders	80		80
Tracks	160		80
R/W Heads		2		1
Encoding Method	FM, MFM		FM, MFM
Heat Dissipation
Operating Mode (Head Load)	6.0W		S.OW
Standby mode (Head Unload)	3.9W		3.9W
Media Requirements	SONY OM·D4440		SONY OM·D3440
3.5" x 3.7" (90 mm x 94 mm)

- 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)						Not required
Meantime Between Failures (MTBF)						8000 POH (Power On Hourtime)
Meantime to Repair (MTTR)						30 min.
Component Life						5 years or 15,000 POH
Media Life						3.0 x 10" passes/traek
Disk Interchange						20,000 times
Soft Read Error						1 per 10' bits read
Hard Read Error						1 per 10" bits read
Seek Error						1 per 10" seeks
Envlronmenta' Limits
Temperature (Operating)					40· F to 115°F (5°C to 45°C)
Humidity	(Operating)				20 % to 80 % relative humidity, with a wet bulb temperature of85°F
Vibration	(Opel'8ting)				(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).
Dimensional Data
Height		2.0 In.		(51 mm)
Width		4.0 in.		(102 mm)
Depth		5.1 in.		(130 mm)
Weight		1.51bs		(S50 g)
DC Power Requirements
Reading	+12.0 V		±5 %		0.30 A (typical)
(Operating)	+5.0 V		±5 %		0.48 A (typical)

RECORD OF REVISIONS

REVISION		NOTES
1	ORIGINAL ISSUE	November, 1983

-2-

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

em 4-7.

4-6-2.

Installation and Adjustment .•.••.••••..

••.•..

•.••

31

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

ED

5·11·1.

Tools and Measuring Equipment

..................

"

54

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-

Introduction

SECTION 1

INTRODUCTION

This manual is a maintenance guide forOA·D32W (Double sided) and OA·D32V (Single sided).

SECTION 2 describes disks and tools necessary for maintenance.

SECTION 3 provides fault diagnostic procedures that may require spare parts or some adjustments.

The overall check after removals and adjustments will be included in this section.

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
E!D j.		chassis bottm, and then apply nut lock paint onto it.
		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 -

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)

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 Metal Braid

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	(J-609-IS2-0A)
SMC-70 System

SMI-70lll SMI-70llA I SMI-70121 SMI-70l2A

SMC-70
KX-13Gl
'AID Converter	(J-623-002-OA)
25P/26P Conversion Cable	(J-623-90l-0A)
Radial Alignment System Disk
(OR-DS6VA)	(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)	(J-609-l20-0A)
Geared Driver	(J-609-0 l7-0A)
Pad Weight	(J-609-124-0A)
Hexagon Wrench Torque Driver	(J-609-125-0A)
Power Cable	(J-609-l30-0A)
Interface Cable	(J-609-200-0A)

c.Measuring Equipment Oscilloscope Dual Trace 20 MHz

Universal Counter Resolution 0.1 msec.

Tension Gauge	(Max. 200 g)	(J-604-163-OA)
Tension Gauge	(Max. 20 g)	(7-732-050-fO)

d.Disks·

Level Disk

lSI	OR-D46VA	(8-960-009-31)
_	OR-D46WA	(8-960-009-40)
Alignment Disk
lSI OR-D47VA		(8-960-009-32)
_	OR-D47WA	(8-960-009-41)
Dynamic Inspection Disk +30
lSI OR-DSIVA		(8-960-009-35)
_	OR-DSIWA	(8-960-009-44)
Dynamic Inspection Disk - 30
lSI OR-D52VA		(8-960-009-36)
_	OR-DS2WA	(8-960-009-45)
Cleaning Disk
lSI	OR-D29VA	(8-960-009-15)
_	OR-D29WA	(8-960-009-39)
e. Expendable and Chemical Supplies
Nut Lock Paint
Alcohol
SonyOU		(7-611-0.18-01)
Sony Grease		(7-622-001-52)
Bamboo Stick
Applicator

-8-

2-2. SPECIAL TOOLS

2-2-1. MFD Checker D

(1) MFD Checker D configuration 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 n function 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.

Special Tools

WCP W1M .. • .... • 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.

Power Cable

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 signals are low (true). The INDEX indicator blinks when the INDEX signal is applied to the board.

TRACK POSITION (Seven segment LED indicator 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-"

MFD Checker II Circuit Diagram MFD Checker II Circuit Diagram

R3B

4.7K

R33

IK

SELECT!

~DIP

(SELECT)

l

I

R3

IIC

lC4

06

DKC

4

(CHORST) { RZB

(sIDE SE/.) 1:

d/gdast JII<

...---- T"9~/c

!esidt9)

(--c:----H-GR-ST--.,~

(SIDE SEL 'FJeSide/)

R3S

(

RDDATA~:jl

II<

TPB

TP3

OFF TP9

R31

10K

T.P.G

I

MOTOR ON

2

SELECT &

3

DKCHG

4

SELECT I

S

CHGRST

6

DIRTN

7

GND

8

STEP

I

+5 V

I--

-

9

GND

10

WRTDATA

2

GND

r-

/I

GND

12

WRTGATE

3

GND

t--

- I -

13

GND

14

HD

LOAD

4

+IZV

CI CZ

IS

GND

16

SIDE

SEL

RlWEROIJT

I

+SV

'~ 0.021

17

GND

18

INDEX

~~

19

GND

10

TRK

(HI

Z

OND

21

GND

22

WRTPRT

3

aND

f ---

TP4

"23

GND

24

RD DATA

GND

4

+lZV

"2S

GND

26

READY

EXT WCP IF ZF

MFD Checker II Circuit Diagram

-11-

-12-

Configuration of SMC-70 Drive Test System Disks

2·2·2. Configuration of SMC·70 Drive Test System

System configuration for Radial Alignment and TRK 00 Sencer measurement, adjustment, and error check with SMC·70 System is shown in Fig. 2·2 (a),

(b).

2·2·3. Disks
(a)	Level disk			_	OR·D46VA
				ED OR-D46WA
	These disks are used to check and adjust the read
	amplifier gain and off set,					The self-read/write
	operation can be checked with both of these
	disks and the SMC-70 System.
(b)		Alignment disk		_	OR-D47VA
				ED OR-D47WA
	These disks have prerecorded data such as Cat's
	eye pattern and INDEX signal to check and
	adjust the off-tracking and index position.
					OR·D47VA		OR·D47WA
				SIGNAL		TRACK	SIGNAL	TRACK
		SIDE	CAT'S		EYE	00, 20, 25, 30, 35,	CAT'S EYE	00,20,25,30,35,
			PATTERN			40,45,50,55,79	PATTERN	40,45,50,55,79
		0
			INDEX			40	INDEX	40
		SIDE					CAT'S EYE	40
					not applicable		PATTERN
		I
							INDEX	40

fa} Error Check

(c) DYNAMIC INSPECTION D'ISK +30 1m OR-D5IVA ED OR-D5IWA

DYNAMIC INSPECTION DISK -30 _ OR-D52VA

	Dynamic Inspection Disk/Level Disk	ED OR-D52WA
		These disks can be used in the final check for a
To Monitor		drive with the SMC-70 System.
		NOTE: (+) indicates that data has been recorded in the
		inner side oftracks.
		(-) indicates that data has been recorded in the
		outer side of tracks.
		Contents

(d) CLEANING DISK

1m OR-D29VA

ED OR-D29WA

This type of disk can be used for cleaning the head.

		OR·D51VA	OR·D52VA	OR·D51WA	OR-D52WA
	SIDE	Offset of +30 tJ.m for	Offset of -30 tJ.m for	Offset of +30 tJ.m for	Offset of -30 tJ.m for
	0	all formatted tracks	all formatted tracks	all formatted tracks	all formatted tracks
	SIDE	not applicable	not applicable	Offset of +30 tJ.m for	Offset of -30 tJ.m for
	I			all formatted tracks	all formatted tracks

fb} Radial AlignmentlTRK 00 Senser

Fig. 2·2

-13-

-14-

Before Troubleshooting

SECTION 3

TROUBLESHOOTING

SECTION 3 describes the methods of troubleshooting. 3-2 refers to several errors specfied in a system level. 3-3 describes normal operations and the check points for abnormal operations. These descriptions define the Error Spot under operating conditions.

3-1. BEFORE TROUBLE SHOOTING

The following procedures are recommended to see if the drive is really faulty or not:

1)Incorrect operational procedure

2)program error of host system

3)Poor connection with host system (esp. GNDrelated connection, frame GND, etc.)

4)Defective disk. Check that same trouble occurs with other disks.

5)Environmental conditions (where electrical noise easily jumps into signal)

6)Influence of strong magnetic field

7)Wrong supply voltage

3·2. TYPES OF ERROR ON A SYSTEM LEVEL

3·2·1. Soft Error

Soft error are caused by;

1)Dirty head

2)Electrical noise

3)Tracking error

4)Poor connection with system (GND-related connection)

5)Incorrect motor speed

6)Incorrect head compliance

Clean the head first. Check for index pulse interval and head compliance and then read error spot more than several times. If not readable, move the head to the adjacent track in the same direction as before, then return to the desired track, and read. If readable this time, check radial alignment. (Refer to 5-4) If not readable yet, the error is not recoverable.

3·2·2. Write Error

To determine whether the disk or the drive is failing. the disk should be replaced by other disks and check that there still exists write error. If write error does not exist any more, remove the old one. If write error exists with use of any rlisk, drive might cause write error.

3·2·3. Seek Error

Seek error comes from:

1)Head movement is incorrect because ellectrical noise jumps into signal.

2)Head driving system might be at fault. If it is not re-readable after re-calibration, drive might be at fault.

3·2-4. Interchange Error

If data written on one drive is readable correctly on another drive, but not by other drives, interchange error exists.

Interchange errors are caused by;

I)Head is not properly positioned.

2)Motor speed is not correct.

3)Optimum head output level and offset and head compliance are not obtained.

4)Chucking mechanism does not work.

3·3. FAULT DIAGNOSIS BY MFD CHECKER II

3-3-1 describes check method for normal operations in accordance with the predetermined procedUres.

3-3-2 describes check points for abnormal operations which come out in accordance with the above procedures.

3·3·1. Normal Operation

Pre-setting:

1)Refering to Fig. 2-1 (Micro Floppydisk Drive Connection), connect the drive to MFD Checker

II.

2)Set the slide switch (SI01) on the disk drive to

"}".

3)Set all switches in the MFD Checker II to "OFF".

-15-

Normal· Operation

Procedure	Step			Operation
1	Power On	1. The head		automatically returns to TRK 00 and stops
			there.
		2. The disk motor remains stopped.
2	Drive Select Check after checked,	1. The TRK 00, WP,			and DSKCHG indicators light only
	the disk drive is to be kept		when the DRIVE SELECT switch on the MFD Checker
	selected.		D and the slide switch (S 10 1) on the disk drive are set as
			follows:
			MFD Checker n		Disk drive
			1	2	IS101)
			OFF	OFF	1
			ON	OFF	2
			OFF	ON	3
			ON	ON	4
			C?therwise, these indicators go out.
3	Operation during CASSETTE IN	1. When the cassette is inserted, the motor is rotating and
	(Alignment disk is to be inserted.)		the plunger is pulled out. The head is loaded and un-
			loaded in sequence. The motor then stops operation.
4	MOTOR ON switch on	1. The motor rotates. (The INDEX indicator on the MFD
			Checker II blinks.)
		2. The TRK 00, WRTPRT, RDY, and DSKCHG indicators
			light. (The RDY indicator, however, lights in about 1.5
			seconds after the disk is inserted.)
5	CHGRST switch on	1. The DSK CHG. indicator goes out at the moment when
			the CHG RST switch is pressed.
6	HD LOAD switch on	mJ 1. The plunger Solenoid is set on, and the pad lifts down.
		IE 2. The plunger Solenoid is set active and the head lifts
			down.
		3. The clearance between the HL arm and pad arm is set as
			shown in Fig. 5-9.
7	Stepping	1. When the STEP IN switch is pressed, the head is con-
			tinuously stepped in until it arrives at TRK 79.
			When the STEP OUT switch is pressed, the head is
			continuously stepped out until it arrives at TRK 00.
		2. When the head is set to any track other than TRK 00,
			the TRK 00 indicator does not ligh(
8	Track positioning	1. Such a Cat's eye pattern signal as slivwn in Fig. 3-1 (a)
			can be obtained at CNI07-1 on the disk drive when the
			head accesses TRK 20, TRK 30 or TRK 50. The oscil-
			loscope is triggered by the signal at TP-5 of the MFD
			Checker II.
		Note: Such a signal as shown in Fig. 3-1 (b) can be obtained when the
			head accesses TRK 40.
		Em 2. SIDE SELECT switch to side 1. such a Cat's eye pattern
			signal as shown Fig. 3-1 (b) can be obtained at CN 107-1
			on the disk drive. When the head accesses TRK 40.
		3. Set amplitude L in Fig. 3-1 (a) to 5 divisions, and then
			read amplitude R in Fig. 3-1 (a).
			Calculate the OFF TRACK value, refering to Table 3-1

-16-

Normal Operation

Procedure	Step		Operation
		(c) and (d), in accordance with R in Fig. 3·1 (a).
		Then, obtain the humidity-compensated OFF		TRACK
		value from the following expression:
		The compensated OFF TRACK value = OFF		TRACK
		value + 0.2 (50 -	H)(39.5 - 0.1875N - 1.5S)/33.5 ...(1)
		Where;

H:Relative humidity (%)

N:Track number

S:Side ID number

Side 0: 0

Side 1: 1

The compensated OFF TRACK value should meet the following formula. . '

-20 ~ Compensated OFF TRACK value ~ +20 ... (2)

[EX] For R = 4.5 in the OA-D32V, the apparent OFF TRACK value is as shown in table 3·1 (d).

Assuming =4.5,

H = 60 %, N = 40, 'al1d S = I, we can obtain the compensated OFF TRACK value as 2.6 from expression (1). This satisfy the formula.

(a)

		Fig. 3·1 Cat's Eye Pattern Signal										(b)
						0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9
			2:			34.5	32.9	31.3	29.S	28.3	26.S	25.4	24.0	22.7	21.4
			3:			20.1	IS.9	17.7	16.5	15.3	14.2	13.1	12.0	11.0	9.9
			4:			S.9	8.0	7.0	6.1	S.I	4.2	3.4	2.5	1.6	0.8
			5:			0.0	-O.S	-1.6	-2.3	-3.1	-3.S	-4.6	-5.3	-6.0	-6.6
			6:			-7.3	-S.O	-S.6	-9.3	-9.9	-10.5	-11.1	-11.7	-12.3	-12.9
					7:	-13.4 -14.0		-14.5	-15.1	-15.6	-16.1	-16.6	-17.1	-17.6	-IS.I
				S:		-IS.6	-19.0	-19.5	-20.0	-20.4	-20.9	-21.3	-21.7	-22.2	-22.6
			9:			-23.0	-23.4	-23.8	-24.2	-24.6	-25.0	-25.4	-25.7	-26.1	-26.5
									(e) OA·D32W
					0.0		0.1	0.2	0.3	0.4	Q,1	0.6	0.7	0.8	0.9
				2:	36.9		35.1	33.4	31.S	30.2	2S.7	27.2	25.7	24.3	22.9
				3:	21.5		20.2	18.9	17.6	16.4	15.2	14.0	12.9	11.7	10.6
				~:	9.6		S.S	7.5	6.5	5.5	~	3.6	2.7	1.8	0.9
				5:	0.0		-0.9	-1.7	-2.5	-3.3	-4.1	-4.9	-5.6	-6.4	-7.1
				6:	-7.8		-S.S	-9.2	-9.9	-10.6	-11.2	-11.9	-12.5	-13.1	-13.7
				7:	-14.3		-14.9	-15.5	-16.1	-16.6	-17.2	-17.7	-18.3	-IS.8	-19.3
				S:	-19.8 -20.4			-20.8	-21.3	-21.S	-22.3	-22.S	-23.2	-23.7	-24.1
				9:	-24.6		-25.0	-25.4	-25.9	-26.3	-26.7	-27.1	-27.5	-27.9	-2S.3
									(d) OA·D32V
								Table 3·1. Apparent off Track
9		Motor speed				1. The Motor speed can be					measured at TRK35, in TP·5 on
						MFD Checker II with an universal counter.
						It should be 100 msec ± 1.5 msec.

-17-

NormalOperation

Procedure

Step

Operation

10	Index position		1. The following waveform can be obtained on TRK 40.
		Index
		signal
		(TP-5)					I
		Output					il
		signal
		(CNt07-1)
								-100 J,lsec_::::; T::::; +100 J,lsec.
							Fig_ 3-2 Index Phase Specification
11	TRK 00 sensor level		1.		Move the head until it arrives at TRK 01. (Do not move
						the head passing TRK 01. If the head arrives at TRK 00,
						through the Cat's eye pattern signal is to be rechecked
						and then the head is to be set on the TRK 01.)
					The output signal level of CN I 07-5 is 3 V or more.
			2.		Move the head until it arrives at TRK 00.
					The output signal level of CNI07-5 is 0.7 V or less.
12	Cassette out (When the alignment			1. The DSKCHG indicator lights.
	disk is ejected.)
13	Write (When the level		1. When the WRITE switch is pressed and "2F", "IF", or
	disk is inserted)				"WCP (MfW)" are written, the corresponding waveform
					can be obtained at CN 107-1. (Refer to Fig. 3-3)

I (a)2F

(b) 1F

(c)WCP(M)		(d) WCP(W)
Fig_ 3-3 2F, IF and WCP Waveforms
Em 2. Set the SIDE	SELECT switch	to side 1, and "2F",
"IF", or "WCP (M/W)" are written, the corresponding
waveform can	be obtained at	CNI07-1. (Refer to
Fig. 3-3)

-18-

Normal Operation'

Procedure	Step				Operation
14	Output level		1.	Move the head until it arrives at TRK 79, and then write
				"2F".
				The output signal level of CNl07-l		is 0.4	to 0.8 Vp·p
				(e	0.2 to 0.5 Vp·p).
				The following read data can be obtained at TP-3 on the
				checker. (Refer to Fig. 3-4 (a) (b) )
			Em 2. Set the SIDE SELECT switch to side 1.
				Move the head until it arrives at TRK 79, and then write
				"2F".
				The output signal level of CNl07-l is 0.2 to 0.5 Vp-p.
				The following read data can be obtained at TP-3 on the
				checker. (Refer to Fig. 3-4 (a) )
	0.2V			Output
	-0.5 V			Signal
				RDData
	(a)e				(b) EE1!I
	Fig. 3·4 Output Signal and RD Data Waveforms
15	Peak Shift		1.	Write "WCP(W/M)" ontoTRK 79.
				Such waveforms as shown in Fig. 3-5 (a) (b) can be
				obtained at eNl07-l and TP-3, respectively.
				The waveform in Fig. 3-5 (a) (b) shows the read data at
				~1			.
					Output
					Signal
					(CNtOl·t)
					RDData
					(Tp·3)
	(a)				L-J	(b)
	Less than 2.43 IlSec. (with OA·D46VA)				Less than 2.43 Ilsec. (with OA·046VA)
	Less than 2.43 jlSec. (with OA·D46WA)				Less than 2.43 jlSec. (with OA·D46WA)
			Fig. 3·5 Waveforms of Output Signal and RD Data
				at TRK 79
		Em 2. Set the SIDE SELECT switch to side 1.					Write "WCP
				(W/M)" onto TRK 79.
				Such waveforms as shown in Fig. 3-5 (a) (b) can be
				obtained at CN 107-1 and TP-3, respectively.
				The waveform in Fig. 3-5 (a) (b) shows the read data at
				TP-3.

-19-

Check Points to Abnormal Operation

3-3-2. Check Points to Abnormal Operation

	Step	Abnormal Operation		CheckPoint		Remarks
		for Each Step		(defective place)
	Power On	I. The head ~oves tow!ll'd	I. TRK 00 sensing circuit.		Thcl signal of CN 103-2 is Low level
		the center of the Drive.
		2. The head is stepped out,	1.	TRK 00 sensing circuit.	The signal of CN 103-2 is High level
		but it is idling around	2. Check if the TRK 00 Sensor
		the outmost track.
				Mounted Board is installed a
				little bit outside.
		3. The head moves	1.	Stepping motor drive system.	A voltage of+12 V appears at
		uncertainly. (The head	NOTE: If no TRK 00 is detected in		CN I 05-2 during normal operation.
		movement is not		several seconds after power	Voltages at 3 pin through 6 pin of
		constant.)		is turned on, the CPU auto-	of CNI05 are switched in
				matically stops the stepping
					10 ± 0.1 msec intervals.
				motor and thereafter accepts
				no instructioh.
		4. The disk motor rotates.	1.	Disk motor drive system.	The signal CNIOI-5 and CNIOI-?
					are Low level
	Drive Select Check	1. The I/F indicators are	1.	Drive select circuit system.	The signal ofICIOS-3 for the
	after checked, the	put out for the selected			selected combination is High level
	disk drive is to be	combination, or they			during normal operation. The
	kept selected.	are lit for the unselected			signal ofICIOS-3 is Low level for
		combination.			unselected combipation.
	Operation during	1. After the cassette is	1. The CSTIN signal does not		Refer to 5-S.
	CASSETTE IN	inserted, the head is		appear at CNIOI-5, and it is
	(Alignment disk is	not loaded and the motor		not sent from the motor.
	to be inserted.)	does not rotate.	2. The cassette is not properly
				placed.
		2. The head is loaded, but	1.	The disk motor.	Refer to 5-S.
		the motor does not
		rotate.
		3. The disk motor rotates,	1.	Plunger solenoid ·or its drive	The signal waveforms shown below
		but the head is not		system.	appear of CNI04-2, 3.
		loaded.			During normal operation.
			2.	Plunger stroke.		(Refer to Fig. 3~6)
			3.	Head Clearance.	Refer to 5-10.
			4.	HL arm height.	Refer to 5-9.
	MOTOR ON	I. The disk motor does not	1. Disk motor drive system.		The signal of CNIOI-? is High level,
	switch on	rotate.			or the disk motor is defective.
		2. The IJF indicators do not	1. If no I/F indicato!S is			c
		light.		lit, the drive select is not	+12V _ a ,
				conducted.	+5~-----'\L.-.._______			1
			2.	If some IfF indicators are lit,	CN104.3fOISK IN
				the IfF signal circuit is			r--
				defective.	CN104·2 """5 V
						It----15-m-s-ec-.--- fl
						Fig. 3·6

-20 -

Check Points to Abnormal Operation

Step

Abnormal Operation

Check Point

Remark.

for Each Step

(defective place)

CHGRST switch on

1.

The DSKCHG indicator

I. The CHGRST signal (CN I 09-3)

does not go out.

is not sent to the CPU

(lCI01-9).

HD LOAD switch on

1.

The plunger solenoid is

1. The HD LOAD signal

Waveforms of normal operation

not energized.

(at CNI09-14) is not sent to

are;

the CPU (ICIOl-6).

HD LOAD

IC101-33

I

IC101-34

Fig. 3-7

2. IC III

3.

IC 101

Stepping

1. The step operation does

1.

Stepping motor drive system

In normal condition, the signal of

not function at all, or it

or stepping motor itself.

ICIOI-40 is High level for about

is not smoothly

I msec after the STEP signal enters.

functioned.

During this time, a DC voltage of

+12 V is applied to the stepping

motor.

TRACK,.

Po(ICI06-5)

PI (ICI06-9)

P2(1CI06-11)

P3(1CI06-13)

0,4,8, ••• 72,76.

H

H

L

L

1,5,9, ••• 73,77.

L

H

H

L

2,6,10, ••. 74, 78.

L

L

H

H

3,7,11, •.• 75,79.

H

L

L

'H

2. The harness (~ e, the TRK 00

sensor) is internally attached

to other mounting parts.

3. Obstacles are attached to the

slide guide shaft.

Track positioning

1.

The ratio of the left to

1.

A voltage of +5 V is not applied

right signals does not

to the stepping motor.

meet the specification.

(CNI05-I,2)

2.

Radial alignment is incomplete.

Refer to 5-4.

2.

No signal appears.

I. Read amplifier circuit.

Signal appeance must be confirmed

with the sequence ofCNI07-1,

ICI03-16, ICI03-17, ICI03-I,

ICI03-2, ICI04-7, ICI04-8.

2;

A seek error has occurred_

Refer to 3-2-3.

-21 -

::heck Points to Abnormal Operation

	Step	Abnormal Operation			Check Point	Remarks
		for Each Step			(defective place)
	Motor speed	I. The motor speed does not	1.		The disk motor	Refer to 5-8.
		meet the specification.	2. The pad pressure			Refer to 5-2.
	Index position	I. When the cassette is	1.		The chucking mechanism of	Refer to 4-11.
		inserted twice or more,			the disk moter is defective.
		positions on each track
		is varied ±40 p.sec or
		more.
		2. When the cassette is set	1. The INDEX phase is			Refer to 5-6.
		twice or more, positions			mis-adjusted.
		on each track is varied
		±40 Ilsec or less. The
		shifted positions,
		however, do not meet·
		the specification.
	TRK 00 sensor level	I. The head returned from	1.		The TRK 00 sensor positioning	The signal level of CNI07-5
		inside track does not			is improper.	is 3 V or more at TRK 01 during
		stop at TRK 0 I and it				normal operation. (Refer to 5-4.)
		goes to TRK 00 where
		re-calibration is to be
		carried out.
	Cassette out	1. When the casette is	1.		Signal has not been detecte'd	The signal of CNIOI-S remains
	(When the alignment	ejected, the DSKCHG			cassette ejection. Check if	Low level.
	disk is ej ected.)	indicator does not			the D-detected arm moves
		light.			properly.
			2.		Check if the disk motor
					I circuit board operates
					properly.
			3.		Signal appearance must be
					confirmed with the sequence
					ofICI01-3,IC112-I,
					IC112-3, CNI09-3.
	Write	I. The waveform signal	1. Write circuit			iEEChange the SIDE SELECT
	(When the level disk	cannot be re-written.				SWITCH to side I and then
	is inserted.)					conduct the operation speci-
						fied in item 13-1 of NORMAL
						OPERATION.
						In normal condition of write gate
						circuit, terminal voltage of CN I09
						-12 is Low level, terminal voltage
						of ICIOI-46 is High level,
						terminal voltage oflC 11 5-4 is
						High level and
						Em Collector voltage ofQI06 is
						approx. +12·V.
						e When SIDE SELECT switch is
						set to side 0, collector voltage
						of Q 107 is approx. +12 V.
						When it is set to side I,
						collector voltage of Q 106 is
						approx.+12 V.
			2. Check whether write data
					is applied or not.

-22-

						Final Check
Step	Abnormal Operation		Check Point		Remarks
	for Each Step		(defective place)
Output level	1. The output signallevel	1.	Read amplifier gain adjustment		Refer to 5-7.
	does not meet the		is incomplete.
	specification.
	2. Read data does not	1. ICI03 (MC3470AP)
	appear.
Peak Shift	I. The shifted peak value	I. When the value in both "WCP			Refer to 4-14.
	does not meet the		W" and "WCP M" do not
	specification.		meet the specification, the
			head is defective.
		2.	When difference in value		Refer to 5-7.
			between "WCP W" and
			"WCP M" is remarkably Big,
			off set adjustment is incomplete.

3-4.	FINAL CHECK
3-4-1.	Setting of SMC·70
a. Place		auto start switch located on the left
	side	panel to "DISK".

b.A conversion cable for IfF (25 pin to 26 pin) is connected to rear panel of SMI-7012A(Drive" Unit).

Co Connect. the drive under test to the conversion cable and set the DRIVE SELECT switch(SIOI) of the unit to "2".

d.Error check system disk is inserted into drive A of SMI-7012A and power is turned on.

e.After word "I\>" appears on CRT display, drive check program will start.

3-4-2. Set The Check Area

Description	Keying			Display
To display original test condition of the disk.	~lliJllil!ID ITl[Q		..... Floppy Disk Analysis v3.0 .....
	IRETURN!		..... Copyright (C) 1981. Sep. .....
			[Test condition)		drive C
			Minimum track		0
			Maximum track		79
			Minimum Sector		1
			Maximum sector		16
			Sector size		256
			Single or Double side?		S
			Read & Write retry		1
			Seek & Home retry		0
			#Do you want to change these test
			conditions? (Y, N) =
To change any of test conditions.	[XJ IRETURN!		+Minimum track	o [track)='*
Type the minimum track to be tested.
[EX)	@) IRETURN!
In case it is TRK 00.			+Maximum track 79 [track)=q

-23-

Final Check

	Description	Keying				Display
	Type the maximum track to be tested.
	[EX]	IlIl2l IRETURNI
	In case it is TRK 79.		+Minimum sector			1 [sector]==>
	Type the minimum sector to be tested.
	[EX]	ill IRETURN I
	In case it is 1 sector.		+Maxirnum sector			16	[sector]==>
	Type the maximum sector to be tested.
	[EX]	ill!§] IRETURNI
	In case it is 16 sector.		+Sector size		256		[bytes]:=>
	Type the number of byte size per a sector, to be
	tested.
	[EX]
	In case it is 256 bytes.	~~ IRETURNI	+Single side or Double side?
	Type the initial name letter (S-single sided, D-						<S, D>==>
	double sided) of disk surface to be tested.
	[EX]
	In case it is double side.	[Q] IRETURNI	+Read & Write retry				1 [times]==>
	Type the number of how many retry must be
	conducted when read error or write error occurs.
	[EX]	ill IRETURNI					o [times]==>
	In case it is once.		+Seek + Home retry
	Type the number of how many seek retry must be
	conducted when the error occurs.
	[EX]
	In case no retry is desired.		••• Command		table	•••..
			r	: =read test
			w	: = write test
				: = show disk condition
			s	: =set test condition
			h	: = help
			e	: =finish & exit to CP1M

-24-

Check the Drive Unit

3-4-3. Check the Drive Unit

The test item from command table must be chosen.

Description

Keying

Display

1. To read dynamic inspection disk or pre-record-	00 \RETURN \	•••	Read Test		•••
ed data disk.		#Enter pass-count =i
Type the number of pass-count for reading
tracks and sectors pre-set in item 3-4-2.
[EX]
In case it is once.		#Test disk ready?				yes - ... hit [Return]
Insert the disk to be tested.		<<Pass-count =				I»
		In-ward (trkmin- -+ trkmax)
Read test starts under the test condition pre-set		+Track =
		Out-ward (trkmax--+trkmin)
in item 3-4-2.		+Track =
The te~t ends.		•••	Read Test End •••
		[I]	Total of Seek error:
					otimes during 00160 times seek.
		+Seek eRe				error:	0 times
		+Seek				error:	0 times
		[2]	Total of Read error:
					otimes during 02560 times read.
		+10, DATA ADM missing: 0 times
		+10		eRe		error: 0 times
		+DATA eRe				error: 0 times
		+Lost data				error: 0 times
		+Byte data verify Err: 0 times
		[3] Total of Write error:
					otimes during 00000 times write.
		+10,		ADM	missing: 0 times
		+10		eRe		error: 0 times
		+Lost data				error: 0 times
		+Write Protect				error: 0 times
		+Write Fault				error: 0 times
2. To write the data on a level disk.	5YI\RETURNI	... Write Test ...
NOTE: Before writing data pattern on a level disk,		• •• Write data pattern •••
formatting (initialization) can be mode		Pattern No. I ... Random data (all data random)
automaticaly. If the some error occurs during		Pattern No.2 ... Random data (1st byte-OAAh)
the processing, the error will be displayed
		Pattern No.3 ... Worst pattern (DBh, 6Dh, B6h)
under title of "Initialize Test End".
		Pattern No.4 ... User definable
		#Select pattern number:					[I, 2, 3, 4] =
To select the data pattern.
[EX]
In case it is worst pattern.	~ \RETURN \	#Now, You select pattern No: 3
	\RETURN I	#Test disk ready?				yes - - hit [Return]
		••• Write Test Start •••
		+Track = End
The test ends.		• ••	Write Test End ...

-25-

Check the Drive Unit

Description	Keying				Display
[EX)
In case it is random data. (all data random.)	ill/RETURNl		#Now, You select pattern No: 1
			#Hit any key after few seconds = =>
Type any key.	~		#Test disk ready?		yes -0+ hit	[Return)
	/RETURNI		... Write Test Start ...
			+ Track =End
The test ends.			... Write Test End •••
[EX)
In case it is random data. (1st byte =OAAh)	illlRETURNl		#Now, You select pattern No:			2
	[A]		#Hit any key after few seconds ==>
Type any key.			#Test disk ready?		yes -0+ hit	[Return)
	/RETURN/		... Write Test Start ...
			+Track =End
The test ends.			... Write Test End ...
[EX)	[1] IRETURNI
In case it is user definable.			#Now, You select pattern NO:			4
			+Enter hex data [1st Bytes) ==>
Type the data to be written it.
[EX)	[QJOO
In case it is "DA".
NOTE: Only 2 characters can be assigned for each byte;	\RETURNI		+Enter hex data [2nd Bytes) ==>
the character of more than two is disregarded.	IRETURNI		#Test disk ready?--hit [Return)
The Key IRETURNI must be depressed at the
end of each byte. Maximum twenty (20) charac-	IRETURNI		••• Write Test Start ...
ters (ten kind of byte -10th bytes) can be			+Track = End
assigned.
The test ends.			... Write Test End
3. To display the test condition.			[Test condition)			drive C
			Minimum track			0
			Maximum track			79
			Minimum sector			1
			Maximum sector			16
			Sector size			256
			Single or Double side?			S
			Read & Write retry			1
			Seek & Home retry			0
-4. To change any of test condition. (Refer to item	llillRETURNI		+Minimum track		0 [track) ==>
3-4-2)
5. To display the command table.	ill] \RETURNl		... Command table ...
			r	: = read test
			w	: = write test
			1 : = show disk condition
			s : = set test condition
			h	: =help
			e	: = finish & exit to CP/M
6. To end. the test or retest from the first step.	lID IRETURNl		A>

-26-

Error Message

	3-4-4.	Error Message
				I		Countermeasure
	Kind of Error			Error Message	Considerable Cause
						(Confirmation I Adjustment).
	SEEK	ERROR	Seek CRC error		Stepping motor load torque is too	Confirm stepping motor load torque.
			Seek error		high.	(Refer to 5·5.)
					Stepping motor circuit is out of order.	Confirm the function of stepping
						motor circuit.
	READ	ERROR	10, data, ADM missing.		Read circuit is out of order.	Confirm the read circuit.
						(at first check RF out put)
			lD, data CRC error		Off track, 'chucking trouble,	Confirm head compliance, (Refer to
					wrong head compliance.	5-3.) chucking mechanism or radial
						alignment and TRK 00 sensor
						(Refer to 5-4).
	WRITE		10	ADM missing	No write function. (write circuit	Confirm the waveform of RF output.
	ERROR				is out of order, no formatting)	(CNl07-l)
			lD	CRC error	Off track wrong head compliance,	Confirm the radial alignment and
					chucking trouble, or disk.	TRK 00 sensor (Refer to 5-4.), head
						compliance (Refer to 5-3.), or
						chucking mechanism.
			Write protect error		Condition is set to write protect.	Confirm Media, write protect circuit
						or write protect mechanism.

-27-

MEMO

-28-

FC-9/FC-14 Mounted Board Replacemen1

SECTION 4

PART REPLACEMENT

4·1. FC·9/FC·14 MOUNTED BOARD REPLACEMENT

4-1·1. Removal

a.Remove the three screws (PSW2.6 x 6) which fasten both the FC-9/FC-14 Mounted Board and shield plate to the chassis ass'y. (Refer to Fig. 4·1 (a) )

b.Remove all the connectors. Do not apply any

excessive force to the head harness (CNI06).	.
(Refer to Fig~ 4·1 (b»

fa}

Bosl-t-+_".q,.:::),.

fb}

Fig. 4-1 FC·9 / FC·14 Mounted Board

4-1·2. Installation and Adjustment

a.Set the respective connectors to the FC·9/FC·14 Mounted Board.

	Harness	FC·9/FC·14
		Mounted Board
7p	(To the disk motor)	CNIOI
6p	(To the stepping motor)	CN105
(V) 5p	(To the head)	CNI06
(W) 6p	(To the head)	. CNI06
3p	(To the plunger)	CNI04
3p	(To LED)	CNI02
3p	(To tp.e TRK 00 sensor)	CNI03

b.Insert the harness between the chassis ass'y and FC·9/FC·14 Mounted Board and fasten the FC·9j FC·14 Mounted Board and shield plate with the three screws (PSW2.6 x 6). (Refer to Fig. 4-1)

c.Read amplifier gain and offset adjustment. (Refer to 5·7)

d.Index phase adjustment. (Refer to 5-6)

4·2. FRONT PANEL ASS'Y REPLACEMENT

4·2·1. Removal

a.Remove the two screws (PS2.6 x 10) from the bottom of the chassis ass'y and then remove the front panel ass'y. (Refer to Fig. 4-2)

4-2-2. Installation

a.Install the eject button and compression spring onto the front panel ass'y.

b.Install the LED into the square opening within the front panel ass'y, and then press the front panel ass'y to the chassis ass'y.

c.Fasten the chassis ass'y to the front panel ass'y on the bottom surface with the two screws (PS2.6 x 10). (Refer to Fig. 4·2)

NOTE 1: Install both the chassis ass'y and front panel ass'y in place so that these assemblies closely contact.

NOTE 2: Do not pintch the harness, (especially head har· ness), during the installation le, the head harness gap between these assemblies.

	PS2.6x10
. CDmp,"",~ r-l~.;: FC.9/FC'14
Spring	;~r	Mountlld Board
E"'Butt.. ~ ~ i		~
~~~~II
.	~

Front pa!,AIS'Y~.

D'_ GLSPR20

Fig. 4-2 Front Panel Ass'y Replacement

-29-

Blind Panel Replacement

4-3. BLIND PANEL REPLACEMENT

4-3·1. Removal

a.Remove the front panel ass'y. (Refer to 4-2)

b.Remove the blind panel by twisting it into the arrow while pressing its both edges. (Refer to Fig. 4-3)

4-3·2. Installation

a.Press the blind panel toward the cassette-up ass'y and latch the two tabs onto the disk holder. (Refer to Fig. 4-3)

b.Install the front panel ass'y. (Refer-to 4-2)

Fig. 4·3 Blind Panel Replacement

4-4. LED MOUNTED BOARD ASS'V REPLACEMENT

4-4·1. Removal

a.Remove both the FC-9/FC-14 Mounted Board and shield plate. Disconnect CN 102 connector. (Refer to Fig. 4-4 (a) )

b.Remove the front panel ass'y. (Refer to 4-2)

c.Remove the LED Mounted Board ass'y from the chassis ass'y.

4-4·2. Installation

a.Peel off remover from the cushion and set the LED Mounted Board as shown in Fig. 4-4 (b).

b.Install both the FC-9/FC-14 Mounted Board and shield plate. (Refer to 4-1)

c.Install the front panel ass'y. (Refer to 4·2)

PS2.6x 10

LEO Mounted Board Ass'y

(aJ

REO

BLK (bJ

Fig. 4·4 LED Mounted Board Ass'y Replacement

-30-

Main Cover Replacement

4-5. MAIN COVER REPLACEMENT

4-5·1. Removal

a.Remove the screw (82.6 x 5) which fastens the main cover from the chassis ass'y, and then remove the main cover. (Refer to Fig. 4-5 )

4-5·2. Installation

a.Install the main cover so that the position marked is set in accordance with the arrow, and then install the main cover with the screw (82.6 x 5). (Refer to Fig. 4-5)

c.Perform the pad pressure adjustment. (Refer to 5-2)

d.Perform the head clearance adjustment. (Refer to 5-10)

e.Perform the HL arm height adjustment. (Refer to

5~)

.

f.Make the head clean. (Refer to 5-11)

g.Perform the head compliance adjustment. (Refer to 5-3)

h.Install the main cover. (Refer to 4-5)

Pad Arm Ass'y

Pad Holder

P~~~

Pad Ass'y

		ra)
Fig. 4-5 Main Cover Replacement
ED 4-6. PAD ASS'V REPLACEMENT
4.0-1. Removal
a. Remove the main cover. (Refer to 4-5)
b. Lifting the pad arm tip so that any excessive force		Fig. 4-6 Pad Ass'y Replacement
may not be applied to the pad arm ass'y. remove
the pad ass'y by pressing its rear part. (Refer to	E12I 4-7.
Fig. 4-6 (a»		DAMPER REPLACEMENT
4.0-2. Installation and Adjustment	4·7-1.	Removal
a. Pick up pad holder (not pad itselO of pad ass'y	a. Remove the main cover. (Refer to 4-5)
lightly and insert pad ass'y into the location on	b. Manually set the machine into the Disk-In mode.
pad arm ass'y. (Refer to Fig. 4-6 (a) )	(Refer to Fig. 4-9 (a) )
b. Pull down the pad arm ass'y, and check if the pad	c. Remove the screw (PS2.6 x 6) which fastens the
is arranged in parallel with the head as shown in	damper to the head load ass'y. and then remove
Fig. 4-6 (b).	the damper. (Refer to Fig. 4-7)

-31-

tlead Load Ass'yReplacement

4·7·2. Installation

a.Insert the damper arm tip into between the cassette holder and HL arm, and set the damper to the head load ass'y. (Refer to Fig. 4·7)

b.Install the main cover. (Refer to 4·5)

c.Make.the head clean. (Refer to 5·11)

Fig. 4·7 Damper Replacement

4-8. HEAD LOAD ASS'V REPLACEMENT

4-8·1. Removal

a.Remove both the FC-9/FC·14 Mounted Baord and shield plate: (Refer to 4-1)

. b. Remove the main cover. (Refer to 4·5)

c.Manually set the machine into the Disk·In mode. (Refer to Fig. 4·9 (a) )

Em d. Remove the damper. (Refer to 4·7)

e.Remove the two screws (PS2.6 x 6) which fasten the head load ass'y to the chassis so that an excessive force is not applied to the head arm, and then remove the head load ass'y, (Refer to Fig. 4·8 (a) (b»

4-8·2. Installation and Adjustment

a.Manually set the machine into the Disk·In mode. (Refer to Fig. 4·9 (a) )

b.Pass the harness of the head load ass'y through the opening of the chassis. (Refer to Fig. 4·8

(a) (b) )

c.Fasten both the head load ass'y and lug termi-

nal to the chassis with the two screws (PS2.6 it 6). (Refer to Fig. 4-8 (a) (b) )

d.Bend one tip of the lug terminal by 900

±l~o. (Refer to Fig. 4-8 (c»

Em e. Install the damper in place. (Refer to 4-7)

f.Install both the FC-9/FC-14 Mounted Board and shield plate in place. (Refer to 4-1)

g.Perform the head clearance adjustment. (Refer to 5-10)

h.Perform the HL arm height adjustment. (Refer to 5-9)

i.Install the main cover in place. (Refer to 4·5)

j.Make the head clean. (Refer to 5·11)

Fig. 4-8 Head Load Ass'y Replacement

-32-