Sony TC-WE625, TС-WE725, TС-WE825S Service Manual

TC-WE625/WE725/ WE825S

SERVICE MANUAL

US Model

TC-WE625/WE825S

	Canadian Model
	TC-WE625
	AEP Model
	UK Model
	TC-WE725/WE825S
	E Model
	Australian Model
Photo: TC-WE825S	Chinese Model
	TC-WE625

Dolby noise reduction extension manufactured under license from Dolby Laboratories Licensing Corporation.

HX Pro originated by Bang & Olufsen. “DOLBY”, the double-D symbol aand “HX PRO” are trademarks of Dolby Laboratories

Licensing Corporation.

	Model Name Using Similar		TC-WE505/WE605S/WE705S
	Mechanism
			TC-WE625 : TCM-190RB12CL
		DECK A	TC-WE725/WE825S :
	Tape Transport		TCM-190RB13C
	Mechanism Type		TC-WE625 : TCM-190RB12CL
		DECK B	TC-WE725/WE825S :
			TCM-190RB11C

SPECIFICATIONS

System

Recording system

4-track 2-channel stereo

Fast-winding time (approx.)

90 sec. (with Sony C-60 cassette)

High-speed fast-winding time (approx.) (TC-WE825S and TC-WE725 only)

45 sec. (with Sony C-60 cassette)

Bias

AC bias

Signal-to-noise ratio (at peak level and weighted with Dolby NR off)

Type I tape, Sony Type I (NORMAL): 55 dB Type II tape, Sony Type II (HIGH): 57 dB Type IV tape, Sony Type IV (METAL): 58 dB

S/N ratio improvement (approximate values)

With Dolby B NR on: 5 dB at 1 kHz, 10 dB at 5 kHz With Dolby C NR on: 15 dB at 500 Hz, 20 dB at 1 kHz

With Dolby S NR on (TC-WE825S only): 10 dB at 100 Hz, 24 dB at 1 kHz

Harmonic distortion

0.4% (with Type I tape, Sony Type I (NORMAL):

160 nWb/m 315 Hz, 3rd H.D.)

1.8% (with Type IV tape, Sony Type IV (METAL):

250 nWb/m 315 Hz, 3rd H.D.)

Frequency response (Dolby NR off)

Tape type

Type I tape, Sony Type I	30-16,000 Hz (±3 dB, IEC),
(NORMAL)	20-17,000 Hz (±6 dB)
Type II tape, Sony Type II	30-17,000	Hz (±3 dB, IEC),
(HIGH)	20-18,000	Hz (±6 dB)
Type IV tape, Sony Type IV	30-19,000	Hz (±3 dB, IEC),
(METAL)	20-20,000	Hz (±6 dB),

30-13,000 Hz (±3 dB, –4 dB

recording)

– Continued on next page –

STEREO CASSETTE DECK

MICROFILM

– 1 –

Wow and flutter

±0.13% W. Peak (IEC)

0.07% W. RMS (NAB)

±0.18% W. Peak (DIN)

Variable pitch range (approx.)

–30 to +30%

Inputs

Line inputs (phono jacks)

Sensitivity : 0.16 V

Input impedance : 47 kilohms

Outputs

Line outputs (phono jacks)

Rated output level : 0.5 V at a load impedance of 47 kilohms

Load impedance : Over 10 kilohms

Headphones (stereo phono jack)

Output level : 0.25 mW at a load impedance of 32 ohms

General

Power requirements

Where purchased	Power requirements
US, Canadian	120 V AC, 60 Hz
AEP, UK, Chinese	220 - 230 V AC, 50/60 Hz
Australian	240 V AC, 50/60 Hz
Singapore, Malaysia	120/220/230 - 240 V AC, 50/60 Hz
Power consumption
30 W

Dimensions (approx.) (w/h/d)

Model for UK and Australian : 430 × 120 × 310 mm (w/h/d) (17 × 4 3/4 × 12 1/4 in.)

Model for other countries : 430 × 120 × 290 mm (w/h/d)

including projecting parts and controls

Mass (approx.)

4.3 kg (9 lbs 8 oz)

Supplied accessories

Audio connecting cords (2 phono plugs - 2 phono plugs) (2)

CONTROL A1 cord (supplied for Canadian models only) (1)

Design and specifications are subject to change without notice.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers).

Leakage current can be measured by any one of three methods.

1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.

2.A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

To Exposed Metal

Parts on Set

0.15μF	1.5kΩ	AC
		voltmeter
		(0.75V)

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 2 –

MODEL IDENTIFICATION

–Back panel–

		Part No.
Part No.		Model
3-021-228-0π	TC-WE625	: US model
3-021-228-1π	TC-WE625	: CND model
3-021-228-2π	TC-WE625	: AUS model
3-021-228-3π	TC-WE625	: SP, MY model
3-021-228-4π	TC-WE625	: CH model
3-021-242-0π	TC-WE725	: AEP model
3-021-242-1π	TC-WE725	: UK model
3-021-243-0π	TC-WE825S	: AEP model
3-021-243-1π	TC-WE825S	: UK model
3-021-243-3π	TC-WE825S	: US model

•Abbreviation

CND : Canadian model

AUS : Austrarian model

SP	: Singapore model
MY	: Malaysia model
CH	: Chinese model

TABLE OF CONTENTS

1. GENERAL

1-1. Location of Controls ...........................................................

4

2. DISASSEMBLY

2-1.	Front Panel Assy .................................................................	5
2-2.	Mechanism Deck .................................................................	5
2-3.	Fitting Base .........................................................................	6
2-4.	Capstan Motor, Reel Motor .................................................	6
2-5.	Head Deck Assy ..................................................................	7
3. MECHANICAL ADJUSTMENTS .................................		8
4. ELECTRICAL ADJUSTMENTS ...................................		8
5. DIAGRAMS
5-1.	IC Pin Description .............................................................	12
5-2.	Circuit Boards Location ....................................................	14
5-3.	Printed Wiring Boards –Main Section– ............................	15
5-4.	Schematic Diagram –Main Section (1/4)– ........................	17
5-5.	Schematic Diagram –Main Section (2/4)– ........................	19
5-6.	Schematic Diagram –Main Section (3/4)– ........................	21
5-7.	Schematic Diagram –Main Section (4/4)– ........................	23
5-8. Printed Wiring Boards –Power Section– ...........................		25
5-9.	Schematic Diagram –Power Section– ...............................	26
5-10.	Printed Wiring Boards –Panel Section– ............................	27
5-11.	Schematic Diagram –Panel Section– ................................	29
5-12. Printed Wiring Boards –Deck A Section– .........................		31
5-13. Schematic Diagram –Deck A Section– .............................		32
5-14.	Printed Wiring Boards –Deck B Section– .........................	33
5-15. Schematic Diagram –Deck B Section– .............................		34
5-16. Printed Wiring Board
	–DOLBY-S Section (TC-WE825S only)– ........................	35
5-17. Schematic Diagram
	–DOLBY-S Section (TC-WE825S only)– ........................	35
6. EXPLODED VIEWS
6-1.	Case Section ......................................................................	38
6-2.	Chassis Section .................................................................	39
6-3.	Cassette Holder Section ....................................................	40
6-4.	Front Panel Section ...........................................................	41
6-5.	Tape Mechanism Section 1 ...............................................	42
6-6.	Tape Mechanism Section 2 ...............................................	43
7. ELECTRICAL PARTS LIST ........................................		44

– 3 –

SECTION 1

GENERAL

1-1. LOCATION OF CONTROLS

5		6	7	8	9
1						23
						22
2						21
3
4						20
						19
						18
10	11	12	13	14	15	16 17

1.1/u(Power) button (US, Canadian)

U(Power) button (EXCEPT US, Canadian)

2.DIRECTION MODE switch

3.PITCH CONTROL (ØON/øOFF) switch (TC-WE725/WE825S)

4.PITCH CONTROL knob (TC-WE725/WE825S)

5.Cassette holder (Deck A)

6.COUNTER A buttons (Deck A) RESET button

MEMORY button

7.Display window

8.COUNTER B buttons (Deck B) RESET button

MEMORY button

9.Cassette holder (Deck B)

10.RMS buttons RMS/START button SET button CHECK button DISPLAY button

11.Tape operation buttons (Deck A) 0 (AMS), RMS - button

) (AMS), RMS + button p CLEAR (Stop) button

ª BACK (Reverse play) button · FRONT (Foward play) button P PAUSE button

R REC MUTING button r REC button

12.§(Eject) button (Deck A)

13.DOLBY NR switches ON, OFF, FILTER switch

B, C, S switch (“S” use for TC-WE825S)

14.Tape operation buttons (Deck B) 0 (AMS) button

) (AMS) button

p (Stop) button

ª (Reverse play) button · (Foward play) button P PAUSE button

R REC MUTING button

rREC button

15.§(Eject) button (Deck B)

16.START (DECK B P) buttons

A+B REC button

HIGH/NORMAL, DUBBING AnB button

17.AUTO CAL (START P) buttons DECK A button

DECK B button

18.PHONES jack

19.SYNCHRO button and indicator

20.ARL button

21.FADER button

22.REC LEVEL knob

23.AUTO indicator

– 4 –

SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
CASE
Unscrew the five case attachment screws M3 × 8 and remove
the case.
2-1. FRONT PANEL ASSY
POWER VOLTAGE SELECTOR 1 - 2 (Singapore, Malaysia)
FRONT PANEL ASSY 1 - !¶
	2 power voltage selector	1 BVTP 3x8

!§ CN501, 502

	!¢ claw
8 CN51	0 CN002

!¡ CNP73 (WE725/WE825S)

!• front panel assy

!£ BVTP 3x8

2-2. MECHANISM DECK

1 Press the EJECT button.

2 claws

3 cassette lid

3 CNA807

4 CNS802

5 CNA801 (US, Canadian)

6 CNA803

1 BVTP 3x8

2 lug plate

7 CNA806

! claw

!¶ CN503, 504

!™ BVTP 3x6

9 CN51

6 mechanism deck

5 BVTP 2.6x8

4 BVTP 2.6x8

– 5 –

2-3. FITTING BASE

4 PTPWH 2x23

3 connector

6 fitting base

	2 Pull the square belt
5 claws	and put around claws.
	7 gear (trigger)

1 Pull the capstan belt and put around claws.

2-4. CAPSTAN MOTOR, REEL MOTOR

4 claw

2 connector

3 connector

8 capstan motor

7 B 2.6x3

5 claws

6 AUDIO board

0 reel motor

9 P 2.6x2.8

!¡ ground plate

1 square belt

– 6 –

2-5. HEAD DECK ASSY

6 claw

7 head deck assy

1 claw

3 claw

5 torsion spring

4 lever (pinch R) assy

2 lever (pinch F) assy

– 7 –

SECTION 3

MECHANICAL ADJUSTMENTS

PRECAUTION

1.Clean the following parts with a denatured alcohol-moistened swab :

record/playback/erase head	pinch roller
rubber belts	capstan
idlers

2.Demagnetize the record/playback head with a head demagnetizer.

3.Do not use a magnetized screwdriver for the adjustment.

4.After the adjustments, apply suitable locking compound to the parts adjusted.

5.The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

	Mode	Torque meter	Meter reading
	Forward	CQ-102C	30 to 65 g • cm
			(0.42 to 0.90 oz • inch)
			DECK A : 1 to 6 g • cm
	Forward		(0.014 to 0.083 oz • inch)
	back	CQ-102C
	tension		DECK B : 2 to 9 g • cm
			(0.028 to 0.125 oz • inch)
	Reverse	CQ-102RC	30 to 65 g • cm
			(0.42 to 0.90 oz • inch)
	Reverse		1 to 6 g • cm
	back	CQ-102RC
			(0.014 to 0.083 oz • inch)
	tension
	FF/REW	CQ-201B	70 to 120 g • cm
			(0.97 to 1.67 oz • inch)

SECTION 4

ELECTRICAL ADJUSTMENTS

PRECAUTION

1.The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.)

2.The adjustments and measurement should be performed for both L-CH and R-CH.

• Switch position

DOLBY NR switch : OFF DIRECTION MODE switch : A

• Standard record position :

Deliver the standard input signal level to input jack and set the REC LEVEL control to obtain the standard output signal level as follows.

– Record Mode–

AF OSC

level meter

attenuator	10 k		47 k
		set	+
			–
600
LINE IN			LINE OUT

Standard Input Level

Input terminal				LINE IN
source impedance				10 kΩ
input signal level				0.5 V (–3.8 dB)
Standard Output Level
Output terminal				LINE OUT
load impedance				47 kΩ
output signal level				0.5 V (–3.8 dB)
Test Tape
Tape	Contents			Use
P-4-A100	10 kHz, –10 dB			Azimuth Adjustment
WS-48B	3 kHz, 0 dB			Tape Speed Adjustment
P-4-L300	315 Hz, 0 dB			PB Level Adjustment

0 dB = 0.775 V

Test Mode

1.Turn ON power switch pressing “REC MUTING” switch of deck A and B at the same time.

At first, all the fluorescent indicator light up, then the system returns to normal display. (However, “0. 00” is not displayed on the counter.)

2.To release the test mode, turn OFF the power switch.

– 8 –

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Procedure:

1. Forward Playback Mode

	test tape
	P-4-A100	level meter
	(10 kHz, –10 dB)	47 k
	set	+
		–
		LINE OUT

2.Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB.

L-CH	output	within		within
	level	1 dB
peak				1 dB
R-CH
peak			screw position
screw
position		L-CH	R-CH
		peak	peak
3. Playback Mode
test tape
P-4-A100			oscilloscope
(10 kHz, –10 dB)		L-CH
			47 k
		set	V+	H+
			–	–
		R-CH	47 k
		LINE OUT
		Screen Pattern
	In phase 45˚ 90˚		135˚ 180˚
		good	wrong

4.Change the reverse playback mode and repeat the steps 1 to 3.

5.After the adjustment, lock the adjustment screws with suitable locking compound.

Adjustment Location: –record/playback head–

forward side

reverse side

adjustment screws

Tape Speed Adjustment

DECK A

DECK B

Procedure:

–Forward Playback Mode–

test tape

WS-48B

(3 kHz, 0 dB)

frequency counter

47 k

+

set

–

LINE OUT

(High speed adjustment)

1.Set to test mode. (Refer to page 8.)

2.Set to FWD playback mode.

3.Twice pressing the HIGH/NORMAL switch.

4.Adjust RV72 so that the frequency counter reading becomes 6,000 ± 20 Hz.

5.Release test mode after adjustment is completed.

(Normal speed adjustment)

1.Set to FWD playback mode.

2.Adjust RV71 so that the frequency counter reading becomes 3,000 ± 10 Hz.

(Pitch control adjustment) (TC-WE725/WE825S only)

1.Push the PITCH CONTROL switch.

2.Set RV902 to mechanical center.

3.Set to FWD playback mode.

4.Adjust RV601 so that the frequency counter reading becomes 3,000 ± 10 Hz.

Frequency difference between the beginning and the end of the tape should be within ± 3%.

Frequency difference between the deck A and deck B the beginning of the tape should be within ± 1.5%.

Adjustment Location: AUDIO board, MAIN board (See page 11.)

Playback Level Adjustment DECK A DECK B

Procedure:

–Forward Playback Mode–

test tape
P-4-L300		level meter
(315 Hz, 0 dB)		47 k
	set	+
		–
		LINE OUT

Adjust RV11 (L-CH) and RV21 (R-CH) so the level meter reading becomes the adjustment limits below.

Adjustment Value:

LINE OUT level : –7.7± 0.5 dB (0.301 to 0.338 V)

Level difference between channels : within 0.5 dB

Confirm that the LINE OUT level does not change in playback mode while changing the mode from playback to stop several times.

Adjustment Location: AUDIO board (See page 11.)

– 9 –

Bias Consumption Current Adjustment

DECK A DECK B

This adjustment should be performed when replacing the head assy or the bias oscillator transformer (T81, T91).

Procedure:

digital blank tape voltmeter CS-413

set				+
				–
LINE IN	R-CH			L-CH
no signal	3	2	1	TP81

1.Connect the digital voltmeter to test point TP81.

2.Set RV81 (L-CH), RV91 (R-CH) to mechanical center.

3.Set to FWD record mode.

4.Adjust T81 (L-CH), T91 (R-CH) so that the digital voltmeter reading becomes minimum.

Adjustment Value: Maximum 220 mV

Adjustment Location: AUDIO board (See page 11.)

Record Bias Adjustment DECK A DECK B

Setting:

REC LEVEL control : standard record position (See page 8.)

Procedure:

1. Record Mode

AF OSC

10 k	blank tape
	CS-123

attenuator

set

600 LINE IN

1) 315 Hz 38.8 mV (–26 dB)

2) 10 kHz

2. Playback Mode

recorded portion

		level meter
		47 k
	set	+
		–
		LINE OUT

Confirm that the 10 kHz playback output is 0 ± 0.5 dB relative to the 315 Hz output. If necessary, adjust RV81 (L-CH), RV91 (R- CH) and repeat the steps given above.

Adjustment Location: AUDIO board (See page 11.)

Record Level Adjustment DECK A DECK B

Setting:

REC LEVEL control : standard record position (See page 8.)

Procedure:

1. Record Mode

AF OSC

blank tape

10 k	CS-123

attenuator

set

600

LINE IN

315 Hz, 38.8 mV (–26 dB)

2. Playback Mode

recorded		level meter
portion
		47 k
	set	+
		–
		LINE OUT

Confirm playback the tape recorded become adjustment level as follows.

If necessary, adjust Deck A : RV102 (L-CH), RV202 (R-CH) and Deck B : RV101 (L-CH), RV201 (R-CH) and repeat the steps 1 and 2.

Adjustment Value:

LINE OUT level : –26± 0.5 dB (36.7 to 41.1 mV)

Adjustment Location: MAIN board (See page 11.)

– 10 –

Adjustment Location:

–audio board (component side)–

RECORD BIAS ADJ

RV91 RV81

(R)(L)

RV72 (HIGH)

TAPE SPEED ADJ

RV71 (NORMAL)

			TP81
	BIAS	T81 (L)	RV21 (R)	PLAYBACK
	CONSUMPTION
				LEVEL
	CURRENT	T91 (R)
			RV11 (L)	ADJ
	ADJ

–main board (component side)–

RECORD LEVEL ADJ

(DECK B)

RV101	RV201
(L)	(R)

RECORD LEVEL ADJ

(DECK A)

RV202 RV102

(R)(L)

RV601

TAPE SPEED ADJ (PITCH CONTROL)

– 11 –

SECTION 5

DIAGRAMS

5-1. IC PIN DESCRIPTION

• IC801 CXP82432A-006Q (SYSTEM CONTROLLER)

Pin No.

Pin Name

I/O

Pin Description

1

T-REEL (A)

I

Take-up reel rotation detection input (DECK A)

2

S-REEL (B)

I

Supply reel rotation detection input (DECK B)

3

T-REEL (B)

I

Take-up reel rotation detection input (DECK B)

4

SIRCS IN

I

Sircs signal input

5

POWER IN

I

Power-off detection input

6

VOL OUT

O

Record level control output (PWM)

7

A/B SEL

I

Playback A/B selector input “L” : A, “H” : B

8

CONTROL-A IN

I

Control A signal input

9

CONTRL-A OUT

O

Control A signal output

10

REC MUTE (A)

O

Recording mute output (DECK A) “L” : Mute ON

11

REC CAL 0 (A)

O

Recording CAL-0 output for auto calibration. (DECK A)

12

REC CAL 1 (A)

O

Recording CAL-1 output for auto calibration. (DECK A)

13

GP CAL 0 (A)

O

GEQ CAL-0 output for auto calibration. (DECK A)

14

GP CAL 1 (A)

O

GEQ CAL-1 output for auto calibration. (DECK A)

15

O

Record/playback dolby NR mode selector output “L” : Playback

REC/PB

16

REC MUTE (B)

O

Recording mute output (DECK B) “L” : Mute ON

17

AMS IN

I

AMS signal input “L” : Music present

18

O

Audio selector “H” : CAL, “Open” : Dolby off, “L” : Dolby S

CAL/OFF/S

19

O

Dolby selector “H” : C, “Open” : B, “L” : Dolby off

C/B/OFF

20

REC CAL 0 (B)

O

Recording CAL-0 output for auto calibration. (DECK B)

21

REC CAL 1 (B)

O

Recording CAL-1 output for auto calibration. (DECK B)

22

GP CAL 0 (B)

O

GEQ CAL-0 output for auto calibration. (DECK B)

23

GP CAL 1 (B)

O

GEQ CAL-1 output for auto calibration. (DECK B)

24

POWER OUT

O

Power hold output

25

O

REC EQ high/normal select output “L” : Normal

RECEQ HIGH/NORM

26

O

Audio selector “H” : Pass, “Open” : Mute, “L” : Dolby

PASS/MUTE/DOLBY

27

O

AMS amp selector “H” : BS, “Open” : AMS, “L” : OFF

BS/AMS/OFF

28

EX IN 0

I

Expander control input (0)

29

EX IN 1

I

Expander control input (1)

30

EXP CTRL 0

O

Expander control output (0)

31

EXP CTRL 1

O

Expander control output (1)

32

A/D IN 0

I

Expander A/D input (0)

33

A/D IN 1

I

Expander A/D input (1)

34

KEY 5

I

Key 5 input (A/D converter)

35

VOL IN

I

Record volume input (A/D converter)

36

TEST/PITCH/VER

I

Test mode/pitch control/version input

37

CD SYNC LED

O

CD SYNCHRO LED driver “L” : ON

38

I

System reset input

RESET

39

EXTAL

I

System clock oscillator input (10 MHz)

40

XTAL

O

System clock oscillator output (10 MHz)

41

VSS

—

Ground

42

TX

—

Connected to ground.

43

TEX

—

Connected to ground.

44

ARL LED

O

ARL LED driver “H” : ON

45

PITCH ON/OFF

O

Pitch control ON/OFF output “L” : ON

46

AVREF

I

Reference voltage input for A/D converter.

47

AVSS

—

Ground for A/D converter.

48

LINE MUTE

O

Line mute ON/OFF control output “L” : Mute ON

49

OSC H/L

O

OSC frequency H/L select output for auto calibration.

50

OSC ON/OFF

O

OSC ON/OFF select output for auto calibration.

51

BIAS CAL 0 (B)

O

EQ bias CAL-0 output for auto calibration. (DECK B)

– 12 –

Pin No.	Pin Name	I/O	Pin Description
52	BIAS CAL 1 (B)	O	EQ bias CAL-1 output for auto calibration. (DECK B)
53	BIAS CAL 2 (B)	O	EQ bias CAL-2 output for auto calibration. (DECK B)
54	BIAS CAL 3 (B)	O	EQ bias CAL-3 output for auto calibration. (DECK B)
55	BIAS CAL 0 (A)	O	EQ bias CAL-0 output for auto calibration. (DECK A)
56	BIAS CAL 1 (A)	O	EQ bias CAL-1 output for auto calibration. (DECK A)
57	BIAS CAL 2 (A)	O	EQ bias CAL-2 output for auto calibration. (DECK A)
58	BIAS CAL 3 (A)	O	EQ bias CAL-3 output for auto calibration. (DECK A)
59	CAP.M (B)	O	Capstan motor driver output (DECK B) “H” : ON
60	CAP.M (A)	O	Capstan motor driver output (DECK A) “H” : ON
61	CAP.M H/L	O	Capstan motor high/normal select output “L” : ON
62 – 77	P16 – P1	O	Fluorescent indicator tube segment driver
78 – 85	G1 – G8	O	Fluorescent indicator tube grid driver
86	G6,G7	O	Fluorescent indicator tube grid driver
87	G7,G8	O	Fluorescent indicator tube grid driver
88	VFDP	—	Fluorescent indicator tube power supply (-28 V)
89	VDD	—	Power supply (+5 V)
90	N.C	—	Connected to power supply.
91	VSS	—	Ground
92	REEL (A) +	O	Reel motor (+) output (DECK A)
93	REEL (A) -	O	Reel motor (-) output (DECK A)
94	REEL (B) +	O	Reel motor (+) output (DECK B)
95	REEL (B) -	O	Reel motor (-) output (DECK B)
96	BIAS (A)	O	Bias ON/OFF output (DECK A) “H”:ON
97	RELAY (A)	O	Relay record/playback selector output (DECK A) “L” : Record
98	BIAS (B)	O	Bias ON/OFF output (DECK B) “H” : ON
99	RELAY (B)	O	Relay record/playback selector output (DECK B) “L” : Record
100	S-REEL (A)	I	Supply reel rotation detection input (DECK A)

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