AIWA HS EM20 Service Manual

HS-EM20

Y

SERVICE MANUAL

STEREO

CASSETTE PLAYER

BASIC TAPE MECHANISM : 4ZM-2 P3NC2

S/M Code No. 09-011-422-9N1

DATA

SPECIFICATIONS

Maximum output: 4 mW + 4 mW (EIAJ 16 ohms)
Power source: DC 3V using two R6 (size AA) batteries
Maximum dimensions: 116.6 (W) x 92 (H) x 35 (D) mm

Weight Approx. 116.8g (4 oz) (excluding batteries)

 Design and specifications are subject to change without notice.

(4 5/8 x 3 5/8 x 1 7/

in.)

16

ACCESSORIES / PACKAGE LIST

PART NO.

NO.

1 8A-HG8-909-010 IB,Y (EGFSI) EM20-C
1 8A-HG8-910-010 IB,Y(EDPOHCZ) EM20 -C
2 84-447-019-310 CLIP,BELT
3 87-B30-396-010 HEADPHONE,HP-M006(T2)

DESCRIPTIONREF. NO. KANRI

 2 

ELECTRICAL MAIN PARTS LIST 1 / 1

REF. NO.

IC

87-A21-684-040 C-IC,TA2145AF

TRANSISTOR

87-026-264-080 C-TR,RN1411
87-026-268-080 C-TR,RN2411
89-327-125-080 CHIP TR,2SC2712GR

DIODE

87-020-027-080 CHIP-DIODE 1SS184

MAIN C.B

C1 87-A11-556-080 C-CAP,S 2200P-50 K B
C2 87-A11-556-080 C-CAP,S 2200P-50 K B
C3 87-010-500-040 CAPE 33-4
C4 87-015-675-040 CAP,E 33-6.3 M SRA
C5 87-A11-565-080 C-CAP,S 8200P-50 K B

C6 87-A11-565-080 C-CAP,S 8200P-50 K B
C7 87-A11-551-080 C-CAP,S 1000P-50 K B
C8 87-A11-551-080 C-CAP,S 1000P-50 K B
C9 87-A11-569-080 C-CAP,S 0.012-50 K B
C10 87-A11-569-080 C-CAP,S 0.012-50 K B

C11 87-A11-553-080 C-CAP,S 1500P-50 K B
C12 87-A11-553-080 C-CAP,S 1500P-50 K B
C14 87-010-498-040 CAP,E 10-16 GAS
C15 87-A11-718-080 C-CAP,S 0.1-25 Z F
C16 87-A11-733-080 C-CAP,S 1-16 Z F

C17 87-A10-489-040 CAP,E 220-4 7L SR
C18 87-A10-489-040 CAP,E 220-4 7L SR
C20 87-A11-726-080 C-CAP,S 0.33-16 Z F
C21 87-A11-726-080 C-CAP,S 0.33-16 Z F
C51 87-A11-733-080 C-CAP,S 1-16 Z F

C52 87-A11-733-080 C-CAP,S 1-16 Z F
C53 87-A10-489-040 CAP,E 220-4 7L SR
C301 87-A11-559-080 C-CAP,S 3300P-50 K B
C302 87-A11-559-080 C-CAP,S 3300P-50 K B
C303 87-A11-596-080 C-CAP,S 0.068-16 K B

PART NO. DESCRIPTIONREF. NO.

KANRI
NO.

DESCRIPTION

PART NO.

C304 87-A11-596-080 C-CAP,S 0.068-16 K B
C305 87-A11-733-080 C-CAP,S 1-16 Z F
C306 87-A11-733-080 C-CAP,S 1-16 Z F
C307 87-A11-587-080 C-CAP,S 0.039-16 K B
C308 87-A11-587-080 C-CAP,S 0.039-16 K B

C309 87-A11-560-080 C-CAP,S 3900P-50 K B
C310 87-A11-560-080 C-CAP,S 3900P-50 K B
C311 87-A11-563-080 C-CAP,S 5600P-50 K B
C312 87-A11-563-080 C-CAP,S 5600P-50 K B
C313 87-015-676-040 E/CAP 47/6.3

C315 87-A11-581-080 C-CAP,S 0.027-16 K B
C316 87-A11-581-080 C-CAP,S 0.027-16 K B
C317 87-A11-733-080 C-CAP,S 1-16 Z F
C318 87-A11-733-080 C-CAP,S 1-16 Z F
C319 87-A11-733-080 C-CAP,S 1-16 Z F

C320 87-A11-733-080 C-CAP,S 1-16 Z F
J1 85-HRL-623-010 JACK,3.5 ST BLK
R53 87-A00-530-080 C-RES,S 180-1/10W F
SFR51 87-024-197-010 SEMI-FIXED RESISTOR, 1K
SW1 87-A90-133-110 SW,LEAF LSA1120JAU

SW2 87-A90-917-010 C-SW,SL 1-1-2 SS-350-B12W-C-L
VR1 87-A90-981-010 VR,RTRY 20KBX1

FRONT C.B

SW301 87-A91-285-110 C-SW,SL 1-1-4 SS-350-B14B-C-L

KANRI
NO.

 3 

CHIP RESISTOR PART CODE

Chip Resistor Part Coding

88

A

Resistor Code

Chip resistor

Wattage Type Tolerance
1/16W 1005 5% CJ

1/16W
1/10W

1/8W

1608
2125

3216

5%
5%

5%

TRANSISTOR ILLUSTRATION

C

B

E

2SC2712
RN1411
RN2411

Symbol

CJ
CJ

CJ

Figure

Value of resistor

Form

L

Dimensions (mm)

t

W

0.55

Resistor Code

108
118

128

LW t

1.0 0.5 0.35 104

1.6 0.8 0.45
2 1.25 0.45

3.2

1.6

: A
: A

 4 

WIRING

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

 5 

R

S

T

U

SCHEMATIC DIAGRAM

 6 

ADJUSTMENT

1. Tape Speed Adjustment
Settings:  Test tape : TTA100

(Tape center)
 Test point : PHONES (J1)
 Adjustment location : SFR51
 MSP : CLASSIC
 Tape selector : NORM
 Volume : Non-clip

(MAX-10dB)

Method: Play back the test tape and adjust SFR51 so that the

frequency becomes 3000Hz ± 10Hz.
Then confirm WOW is less than 0.50%.

2. Azimuth Adjustment
Settings:  Test tape : TTA330/TTA-420

 MSP : CLASSIC
 Tape selector : NORM
 Volume : M A X
 Adjustment location : Head azimuth adjustment

screw

Method: Play back(FWD) the test tape and adjust screw so that

the 8kHz signal output is maximum.

 7 

MECHANICAL EXPLODED VIEW 1 / 1

 8 

MECHANICAL PARTS LIST 1 / 1

REF. NO.

PART NO. DESCRIPTIONREF. NO.

1 8A-HG8-002-110 PANEL,MSP
2 8A-HG8-005-010 CAP, MSP
3 8A-HG8-003-010 KNOB,RTRY MSP
4 8A-HG8-004-010 PLATE,INDICATOR
5 8A-HG8-201-010 RACK,MSP

6 8A-HG8-017-010 LID,CASS EM J224B<[L]Y>
6 8A-HG8-018-010 LID,CASS EM J008N<[S]Y>
7 86-HRM-205-010 SPR-T,CLICK
8 8A-HRL-202-010 SPR-P,CASS
9 87-HRR-206-010 PLATE,HEAD J034<[S]Y>

9 88-HKB-205-010 PLATE,HEAD VIO<[L]Y>
10 88-HKA-027-010 FRAME,CENTER VIO<[L]Y>
10 88-HRJ-038-010 FRAME,CENTER J034<[S]Y>
11 86-HKA-202-010 BAT-CONTACT,(+)
12 8Z-HG8-202-010 HLDR,DC JACK

13 8Z-HG8-203-010 BAT,CONTACT(-)
14 8Z-HG8-018-010 LID,BATT J049N<[S]Y>
14 88-HG8-025 -010 LID,BATT J-224B<[L]Y>
15 8Z-HG8-027-010 CABI,REAR YZ J049N<[S]Y>
15 8A-HG8-013-010 CABI,REAR EM J224B<[L]Y>

16 8Z-HGA-013-010 KNOB,SL DOLBY J049N<[S]Y>
16 8Z-HGA-017-010 KNOB,SL DOLBY J224B<[L]Y>

A 87-264-525-310 SCREW, V+1.7-2.5

B 87-067-732-010 TAPPING SCREW, VT1.4-3

C 87-067-691-010 SCREW VT+1.7-6

D 87-067-384-010 SCREWVT1.4-3.5HL

KANRI
NO.

DESCRIPTION

PART NO.

KANRI
NO.

COLOR NAME TABLE

Basic color symbol Color Basic color symbol Color Basic color symbol Color

B Black C Cream D Orange
G Green H Gray L Blue

LT Transparent Blue N Gold P Pink

R Red S Silver ST Titan Silver
T Brown V Violet W White

WT Transparent White Y Yellow YT Transparent Yellow

LM Metallic Blue LL Light Blue GT Transparent Green
LD Dark Blue DT Transparent Orange GM Metallic Green
YM Metallic Yellow DM Metallic Orange PT Transparent Pink

LA Aqua Blue GL Light Green

 9 

TAPE MECHANISM EXPLODED VIEW 1 / 1

A

26

FRAME,CENTER

2

10

25

29

27

1

28

24

23

3

4

17

19

22

21

16

5

11

18

20

6

7

15

14

13

9

12

8

 10 

TAPE MECHANISM PARTS LIST 1 / 1

REF. NO.

1 84-ZM2-012-010 LEVER,PLAY G
2 84-ZM2-211-01K GEAR,CONNECT
3 84-ZM2-222-010 SPR-T,PLAY
4 84-ZM2-015-010 LEVER,STOP G
5 84-ZM2-014-010 LEVER,REW G

6 84-ZM2-013-010 LEVER,FF G
7 84-ZM2-223-010 SPR-T,REW STOP
8 84-ZM2-232-010 BELT,MAIN
9 09-001-421-010 FLY-WHL,P ASSY
10 87-A90-272-010 HEAD,PH MS25P ETH

11 84-ZM2-220-01K BRG,P
12 84-ZM2-210-01K GEAR,AUTO
13 84-ZM2-218-01K CAP,GEAR AUTO
14 84-ZM2-208-01K LEVER,SHIFT
15 84-ZM2-224-010 SPR-T,FF LOCK

16 84-ZM2-207-01K LEVER,AUTO
17 84-ZM2-206-01K LEVER,LOCK
18 84-ZM2-219-01K PULLEY,MOTOR
19 87-045-385-010 MOT (BCY3B11)
20 84-ZM2-226-010 SPR-C,CLUTCH

21 84-ZM2-212-01K GEAR,CLUTCH
22 84-ZM2-231-010 FELT,CLUTCH
23 84-ZM2-217-01K SHAFT,REEL
24 84-ZM2-225-010 SPR-T,AUTO FIND
25 84-ZM2-216-01K REEL TABLE,R

26 84-ZM2-215-01K REEL TABLE,L
27 84-ZM2-228-010 SPR-C,BT
28 84-ZM2-233-110 PINCH ROL ASSY
29 84-ZM2-227-010 SPR-C,AZIMUTH
A 84-ZM2-242-019 S-SCREW,AZIMUTH-2-5.9

PART NO. DESCRIPTIONREF. NO.

KANRI
NO.

DESCRIPTION

PART NO.

KANRI
NO.

 11 

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