Sanyo M1110 User manual

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————
SERVICE MANUAL
MINI CASSETTE RECORDER
142 381 04
SPECIFICATIONS
Power Source -_ Wow & Flutter ............ eT ee 0.4%, WRMS
DO 4a ieta rasan aaevennnees pews 6V Frequency Response (Overall) .......... 200Hz~ 4,000Hz
(UM-3, HP 7, AA Cell, Mignonzelle, R 6) x 4 Erase Ratio (Overall) ...............0...... 40dB
Output Power ...............0..0.00e- ne 0.6W (Max.) Signal to Noise Ratio ...................0.. 30dB
Current Consumption (at Vol. Min.) 7 Crosstalk
Record mode ................cccceceeeeeee 130mA Track to Track ............ Ase se ye 50dB
Playback mode ................0. ana ceehe 120mA Harmonic Distortion (K3) ................. 10%
Fast Forward mode ...............0.0005 . 220mA Hum & Noise (at Vol. Min.) |
— Rewind mode ........... Shestpusmseealns 220mA at Vol. Min. ............ seapenube ut obaaea a —50dBs
Recording System .................0.0.008 DC Bias | at Vol. Max. ...... ett: renee cena —30dBs
Erasing System .........- ea eee noc eeattes Magnet Erasing Terminal Impedance -
Tape Speed ....... cee cece cece ese c cues 1-7/8ips. + 3% MIG. cccdmadest ace ETRY nee ee 3kO
Fast Forward Time ...............ccceeee es 150sec. (with C-60) Ext Speaker svericw sees dunsennad 80
Rewind Time ................ euotieaace .. 150sec. (with C-60)
—Specifications subject to change without notice.—
WM-8250

_ DISASSEMBLY INSTRUCTIONS
«O°
CABINET BOTTOM REMOVAL
1. Remove the four screws (1 ~ 4) fastening the Cabinet
Bottom and detach the Cabinet Bottom by lifting it, noting the Red Gray
speaker and shield plate leads. | , | |
Blue
Brown
2. The Jack Cabinet and Cabinet Front: can be removed from
the unit by detaching the Cabinet Bottom. :
Jack Cabinet
: es Cabinet Front
| | [J i 2, Remove the two screws (5 and 6) fastening the P.C.Board.
| i Aa 3. Remove the Amplifier P.C.Board by lifting it in the direction
! WW , of the arrow, noting the lead wires of the Indicator P.C.Board
[| ail and Buil-in Microphone.
lf necessary, unsolder their lead.
4. Reassemble in reverse order.
3. Reassemble in reverse order. | MECHANISM CHASSIS REMOVAL
1. Remove the Cabinet Bottom by following the instructions
and unsolder the shield plate lead (gray), the speaker leads _
AMPLIFIER
P.C.BOARD
REMOVAL
(blue
and
red),
and
the
leads
for
the
power
supply
(brown
1. Remove the Cabinet Bottom by following the instructions _ and black) from the Amplifier P.C.Board.
and
unsolder
the
shield
plate
lead
(gray),
the
speaker
leads
|
|
(blue and red), and the teads for the power supply (brown 2. Open the Cassette Compartment Lid by pressing the
~
and
black)
from
the
P.C.Board.
STOP/EJECT
button
and
remove
the
fastening
screw
(7).

3. Remove the post (8) and the two screws (9 and 10) fastening
the Chassis.
. Detach the Mechanism Chassis from the Cabinet Top by lift-
ing it, noting the lead wires of the Indicator P.C.Board and
Built-in Microphone.
If necessary, unsolder their lead.
5. Reassembie in reverse order.

ADJUSTMENTS
GENERAL REMARKS
e Before adjustment, wipe the tape contacting surfaces clean
as well as the contacting surfaces of the driving parts with a
_ soft cloth soaked in alcohol.
Trouble may occur because of oil and grease stains.
e Carefully handle the belt because grease easily attaches to
it. Then, check the used rubber parts. If the rubber has dete-
riorated or is scratched, replace the parts with a new one.
EQUIPMENT REQUIRED
@ VIVM -
@ Frequency Counter
e Dummy.Load (80 )
e Test Tapes
* 8kHz Test Tape (Example: TEAC MTT- 111) for Tine
Speed Adjustment
* 8kHz Test Tape (Example: TEAC MTT-113C) for Head
Azimuth Adjustment |
e DC Constant-voltage Regulator
e Alignment Too!
NOTE:
Supply 6V DC to the Ext. Power Jack from the constant-
voitage regulator at the adjustment.
AUTO SHUT-OFF MECHANISM ADJUSTMENT
1. When the unit is set in the playback mode, the Shut-off Lever
reciprocates according to the rotations of the Take- up Idler
and Take-up Reel.
2. Set the unit in the playback mode with the power supply and
slowly turn the Flywheel clockwise until the Shut-off Lever
comes closest to the Spring.
3. Check that the Spring touches the Rewind Arm, and that the
clearance of 0 ~ O.5mm remains between the Shut- off
Lever and Spring as illustrated.
Ed _ |O|
O% | 0 ~ 0.5mm
*, we | , SSS y es —
. e} fOsta (@®)
Shut-off Lever
Rewind
Arm
;
Spring
“O us
4. If the specified clearance is not obtained, adjust the clear-
ance by bending the Spring.
NOTE:
If the clearance is not adjusted correctly, the following symp-
toms can occur:
A. When the clearance is more than 0.6mm;
* When the Rewind button is released to return the unit
from the review mode to the playback mode, the unit may
shut off automatically.
B. When the Shut-off Lever pushes the Spring while
reciprocating;
* When the tape has reached its ad with the unit in the
playback mode, the unit may not. shut off automatically.
TAPE SPEED ADJUSTMENT
1. Remove the battery compartment lid and connect a frequen-
_cy counter to the earphone jack as illustrated. —
Then, insert a 3kHz test tape (Example: TEAC MTT-111) into
the cassette compartment.
Frequency Counter
3kHz [+ 3%]
Potentiometer (P101) c
for Tape Speed Adjustment
2. While playing back the test tape, adjust the tape speed by
turning the potentiometer (P101) on the P.C.Board until the x
frequency counter reads 3kHz (+ 3%).

SR EI i
me ar : 7
@
|
ADJUSTMENTS
(Continued)
HEAD AZIMUTH ADJUSTMENT
1.
Connect
a
VTVM
to
the
earphone
jack
as
illustrated
and
insert
a
8kHz
test
tape
(Example:
TEAC
MTT-113C)
into
the
cassette
compartment.
. Adjustment
R/P Head
VTVM (Max.)
Adjusting Screw
2.
While
playing
back
the
test
tape,
slowly
turn
the
azimuth
ad-
'
justing
screw
until
the
VTVM
reads
the
maximum.
EAR
3.
After
the
adjustment,
secure
the
adjusting
screw
with
paint
or
glue.
|

PARTS LIST
ee Part No. Description Q’ty
PACKAGE
141 6 1419 64700 Individual Carton © 1
141 6 1449 81800 Styrofoam Case 1
141 6 2519 12090 Poly Cover 1
141 6 3919 41700 PlainPad ~ 1
141 6 4559 00100 Serial No. Sheet 3
ACCESSORIES
4 2419 71641 Cassette 1
142 6 4119 31556 — Instruction Manual — 1
CABINET ~ ae |
CAT = 144 _0 1119 87202 Completed Cabinet Top 1
CA2 = 141 2 4469 17200 Cushion 2
CA3 147 2 2149 15300 Bracket Cabinet 1
CA4 141 2 1119 83200 Cabinet Jack 1
CA5 ~=141 2 2529 05400 ~—— Shaft 1
CA6 = =141 2.1769 07100 Hand Strap 1
CA7 141 2 1119 82201 Cabinet Front 1
CA8 141 2 1519 36300 Decorative Cabinet 1
CA9 =: 1414. 2 2449 45300 Sheet, Mike 1
CA10 4 1539 70620 Microphone [BM1] 1
CA11 = =141 2 3899 10100 Holder Mike 1
CAI2 4 2269 37520 _ LED Indicator P.C.B. Assy [See PCB2] |
CAI3. 144: 2 4219 27200 ~=Screw 1
CA14 141 2 7539 21800 =‘ Post, Cabinet 1
CAI5 4 1329 78092 Amplifier P.C.B. Assy [See PCB1] 1
CA16 = 141 2 1639 50002 Control Knob 1
CA17 141 2 4219 08900 Screw 1
CA18 141 2 4469 14502 Cushion 2
CAi9 141 2 4469 17201 Cushion 4
CA20 1441 01119 87102 Cabinet Bottom Assy 1
CA2i 4 1519 71340 Speaker (80 ) [SP1] 1
CA22 141 2 3729 03100 Bracket, Speaker 2
CA23. 141 2 4219 21800 Screw 2
CA24 141 2 3229 39000 Shield Leaf 1
CA25 141 2 2899 26600 Adhesive Sheet 1
CA26 141 2 4469 35200 Cushion 1
CA27 141 2 1339 28302 Battery Lid 1
CX1 101 3 1302 00811 Screw, Pan Hd. +M2.0x8 1
CX2 = 101 3 1302 01211 — Screw, Pan Hd. +M2.0x12 1
CX3 103 3 1302 00511 Screw, Pan Hd. Tapping-2 +M2.0x5 1
CX4 103 3 1302 00614 Screw, Pan Hd. Tapping-2 +M2.0x6. 1
CX5 128 3 1317 04014 PI Screw-3, Pan Hd. 4+-M1.7x4.0 +
CX6 128 3 1320 04014 PI Screw-3, Pan Hd. +-M2.0x4.0 1
CX7 128 3 1320 06014 PI Screw-3, Pan Hd. +M2.0x6.0 2
CX8 = 131. 3: 1302 00411 Screw, Pan Hd. C SW +M2.0x4 1
CX9 143 3 1702 00618 Screw, Bind Hd. Tapping-B ~+-M2.0x6 1
NOTES: |
1. Parts order must contain Model Number, Part Number and
Description. | |
2. Ordering quantity of screws and resistors must be multiple of
10 pcs.
en re ae epee: ee ei oe ee cere

CABINET EXPLODED VIEW
é
:
ie:

Ref.
MCt
MC2
MC3
MC4
MC5
MCc6
MC7
MC8
MCcg
MC10
Mct1
MC12
MC13
Mc14
MC15
MC16
MC17
MC18
MCt9
MC20
Mc2t
MC22
MC23
MG24
MC25
MC26
MC27
MC28
MC29
MC30
MC31
MC32
MC33
MC34
MC35
MC36
MC37
MC38
MC39
MC40
MC41
MC42
MC43
Mc44
MC45
MC46
MC47
MC48
Mc49
MC50
MC5t
MC52
MC53
MC54
MC55
MC56
MC57
MC58
MC59
MC60
MCé61
Mc62
MC63
Part No.
MECHANISM
141 0 3119 21300
144 2 8119 10801
141 2 5649 20200
141 2 8139 08901
141 2 7539 21800
141 2 4219 28100
141: 0 7419 36800
141 2 8519 94300
141 2 8519 44100
141 2 8419 11900
141 2 7419 81800
141 2 8419 11800
141 2 8529 10800
141 2 7419 82500
141 2 8519 61100
141 2 7149 05800
141 2 4459 25200
141 0 7319 25601
141 2 8219 32000
141 2 3529 36000
141 2 8529 10700
141 2 7439 30600
4 2429 71241
141 2 4219 28300
141 2 8519 47400
4 2429 71250
141 2 4729 01900
141 2 3529 18101
141 2 8529 11100
141 0 5459 01900
141 2 8529 11200
141 2 8539 46800
141 0 7419 35901
141 2 4219 13201
141 2 8549 16400
141 2 7419 84200
141 2 8529 10600
141 2 4539 29600
4 5279 71180
141 2 2449 45200
141 2 4459 26800
141 2 4219 23300
1414 2 8529 11000
141 2 5519 46400 |
141 2 4539 15800
141 0 7419 35801
141 0 7419 35601
144 2 3169 19700
141 2 8519 33000
141 2 8549 16500
141 2 8519 87900
141 2 4539 21800
141 2 5519 46000
141 2 8559 03300
141 0 5219 09000
{41 2 5649 20300
141 0 3129 01500
141 2 8559 04600
141 2 7419 81600
141 2 8529 13000
141 0 5319 07000
141 2 4539 28900
141 2 8559 04300
MECHANISM PARTS LIST
Description .
Chassis Assy
Counter
Counter Belt
Counter Bracket
Post, Cabinet -
Screw, Pan Hd.
‘Record Rod Assy
Spring, Lock Plate
Spring, interlock
Record Lock Lever
Eject Lever
Interlock Lever
Spring, Interloc
Play Rod
Spring, Slide
Brake Arm
Brake Cover
Slide Base Assy
Guide Fape
Spacer, Head
Spring, Erase Head Arm
Erase Head Arm
Erase Head
Screw w/Washer
Spring, Head
R/P Head
Lug
Spacer, Head
Spring, Slide Base
Pinch Roller Arm Assy
Spring, Pinch Roller
Spring, Cassette
Completed Pause Rod
Screw w/Washer
Spring, Pause Rod
Pause Lock Lever
Spring, Pause Latch
Washer
Motor
Sheet
Cushion, Motor
Screw
Spring, Play Rod
Take-up Idier
Washer
Completed Rewind Rod
Completed F.FWD. Rod
Bracket Plate
Spring, Index Lock Lever
Spring, Stop/Eject Rod
Spring, Select Lock
Washer
Capstan Gear
Spring, Flywheel
Flywheel Assy
Capstan Belt
Reel Plate Assy
Spring
Shut-off Lever
Spring, ASO Cancel
Take-up Reel Assy
Spindle Washer
Spring, Supply
+M2.0x8.6
Q’ty
Ref.
No.
Part No.
Description
Q’ty
MC64
MC65
MC66
MC67
MC68
MC69
MC70
MCc71
Mc72
MC73
MC74
MC75
MC76
MC77
MC78
Mc79
Mc80
MC8i
Mc82
MC83
MC84
MC85
MZI
Mz2
Mz3
MZ4
MZ5
MZz6
MZ?
MZ8
Mz9
141 0 5319 07100
141 0 7439 11200
141 2 5519 46100
141 2 7439 30400
141 2 7439 30500
141 2 8549 18400
141 2 7419 81700
141 2 8549 15200
141 2 4539 09300
144 2 5519 46200
141 2 4539 30300
141 0 7419 35701
141 2 8549 16600
144 2 7319 54100
141 2 7319 54000
141 2 7419 81900
141 2 8429 06300
144 2 8519 84300
141 2 8519 92500
141 2 4539 06900
141 2 7319 53700
141 2 8549 15300
101 3 1302 00511
101 3 2502 00711
110 3 1102 00023
112 3 1302 00082
112 3 1302 50082
127 3 1317 02013
135 3 1302 01211
143 3 1702 00618
143 3 1202 00818
NOTES: |
1. Parts order must contain Model Number, Part Number and
Description.
2. Ordering quantity of screws and resist
10 pcs.
E Ring
E Ring
Reel Supply Assy
Rewind Arm Assy
Rewind Gear
Selector Link
Fast Arm
Spring, Fast Arm
F.FWD. Lever
Spring, F.FWD. Rewind Arm
Washer
Fast Gear
Washer
Stop Rod Assy
spring, Eject Plate
Eject Plate
Lock Plate
Cue Review Lever
Record Plate
Spring, Flywheel Support
Spring, Damper Lever
Washer
Take-up Arm
Spring, Take-up Arm
Screw, Pan Hd.
screw, Cylinder Hd.
Sm. Round Washer
+M2.0x5
-M2.0x7
M2.0
M2.0
M2.5
P| Screw-1, Pan Hd.
Screw, Pan Hd. C PW
Screw. Bind Hd. Tapping-B
Screw, Flat Hd. Tapping-B
+M2.0x12
+M2.0x6
+M2.0x8
+M1.7x2.0.
Sn ee oe
ors must be multiple of

MECHANISM
EXPLODED
VIEW
(Chassis Top)
Mc24——® Mzz2——e@ ©—MZI
~~
i , 2—me7
ners os LA
MC26 Ng
— wic25——S
<F | :
§
:
‘
:
Co
a
f :
<i)
: :
ry

(Chassis
Bottom)
St -MC5I
Mz8—e ism av EHD
Ck nag

Ge
P.C.BOARD PARTS LIST
No. Part No. Description ay
AMPLIFIER P.C.B. ASSY
PCBI1 4 1329 78092 Amplifier P.C.B. Assy 1
4 2269 37500 PRC Board 1
141 2 4729 04700 Staple, 10mm 8
141 2 4729 05000 Staple 5mm 1
Ji 4 2359 75472 1P Jack (Mike) |
J2 4 2359 75472 1P Jack (Earphone) 1
J3 4 2359 75461 1P Jack (Remote) 1
J4 4 2359 72954 ‘Ext. Power Socket 1
S1 4 2319 73400 Slide Switch (Record/Piay) 1
S2 4 2319 74490 LeafSwitch (Power) - => 1
P101 “4 2229 73790 —_ Potentiometer (B-3kQ ) 1 >
VR1 4 2229 73572 Volume Control (A-30kQ ) 1
THI04 204.5 9000 00200 Thermister, SDT 20 |
Di 202 5 9110 18820 Diode, 1S 188 A
Q1 203 5 5100 69372 ‘Transistor, 2SC 693 1
iC1 206 5 1084 14010 IC,LA 4140 1
jem 10101 206 5 1555 51220 ~=—s IC, LA5512 1
» Ct CM33 3500 KOOTV = Mylar 0.033.F 50V+10%. 1
= C2 CT4 7 363A MOOAV Tantalume 0.0474.F 63V + 20% 1
C3 ~—sCT1. 0 563A MOOAV Tantalume tuF 63V 420% 1
C4. CD4 7 5350 0002V _ Electrolytic 47unF 35V 1
C5 CC1 2 2500 KEQOC Ceramic 0.0012,F SOV + 10% 1
C6 CD4 7 663A 0001V Electrolytic 47uF 6.3V | 1
C7 CTt 0 463A MOOAV Tantalume O1nF 63V + 20% 1
C8 CD4 7 5250 0001V Electrolytic 47uF 25V 1
C9 CD4 7 5160 0004V Electrolytic 47uF 16V 1
C10 CC1.0 2500 KEQOC Ceramic 0.001nF SOV + 10% 1
C1i . CD10 763A 0001V Electrolytic 100,F 6.3V 1
C12 CD2 2 740A 0002V Electrolytic 2204 F 4V | 1
C13 CC1 2 2500 KEOOC Ceramic 0.0012.F 50V + 10% 1
C14 CC5 6 1500 KEOOC Ceramic 560pF 50V + 10% 1
C15 CD4 7 6100 0003V Electrolytic 47uF 10V 1
C16 CM68 3500 KOOTV Mylar 0.068,F SOV + 10% 1
C17 Cl1 0 3250 KEOQOC Boundary 0.014F 25V + 10% 1
Ci8 CD2 2 740A 0002V _ Electrolytic 220u4.F 4V 1
C19 CD4 7 640A 0002V Electrolytic 47uF 4V t
C20 4 2239 70520 Capacitor 220uF 6.3V 1
C21 CD2 2 7100 0003V Electrolytic 220uF 10V 1
C101 CD47 4500 0002V Electrolytic 0.474F 50V |
i" C102 CC2 2 3250 KEOOC Ceramic 0.0224F 25V + 10% a
“5 ~~ RDI 0 5251 KM000 Carbon 1MQ 1/4W 10% = 1
R6 RD1 5 3251 JMO000 Carbon = 15kOQ «6 1/4W + 5% 1
R12 RP5 6 3121 JVOOO Pretty Carbon 56k. 1/8W 5%) Oot
R16 RP1 0 0121 JHO0O Pretty Carbon 100 1/8W +5% 1
R18 RP1 0 0121 JVOO0 Pretty Carbon 100 1/BW + 5% 4
R22 RD4 7 0251 KM000 Carbon 470 1/4W + 10% 1
R1i0i = RPI 8 1121 JHOOO Pretty Carbon 1800 1/8W + 5% 1
R103 RP5 6.2121 JVO00 Pretty Carbon 5.6kQ 1/8BW .+ 5% |
R102 RD8 2 1251 JMO00 Carbon 8200 1W/4W +5% 1
LED INDICATOR P.C.B. ASSY | eis
PCB2 4 2269 37520 —_ LED Indicator P.C.B. Assy ie:
4 2269 37510 PRCLED 1
D1 4 2029 72090 _ LED (Record/Battery) 1
NOTES: |
1. Parts order must contain Model Number, Part Number and
Description.
2. Ordering quantity of screws and resistors must be multiple of
10 pcs.

IC
&
TRANSISTOR
LEAD
IDENTIFICATION
TRANSISTOR | FRONT VIEW | BOTTOM VIEW
LA5512 FRONT VIEW/ BOTTOM VIEW
2SC693
iil
1234
B— BASE
- C— COLLECTOR
_ E—— EMITTER
. ase a
Compensation Feedback Compensation
er ee ee

WIRING DIAGRAM
, BATTERY
AA CELL X4
6V
4
x
T, POWER JACK
SHIELD
PLATE
J2
EARPHONE JACK
RECORD/PLAY HEAD
Ji
MIKE JACK
So
| J3
REMOTE JACK
RED
ae
BM!
BUILT-IN
MIKE
—13-—
|
7

=
SCHEMATIC DIAGRAM
01 2SC693 ; ic: LA4140
PRE-AMP OO POWER AMP
ne
ave
_4.9V
a
5.4V
|
6V
PEN RI ro +1C6 ee +h cu “ae 8 RI9 a +) C21
3100
560
_Y
47u
$1-7
SI-4
~~
100u
ihe
.
1000
.
|
=P
220y
7 —1 6.3V | . : = 6.3V J2
BMI = ; | EARPHONE JACK
BUILT-IN MIKE
it Z
61033 c9
l6V ™
Hy
3300
4.7u35V
.
i.
3300 4.7u _
MIKE JACK 4; Sicaj ze alee
a
+
i
5
8Sohm
R3 C2 > Oo ¢
4700 [0.047 Se :
—
S
39K>
47
10
3900
= A. 3 DI
7
+
10V
d
|
Reo
Ch)
LN242
HD! (REC. / BATT.)
RECORD/PLAY HEAD |
WW R24
, 560
cio:
LASSI2
:
MOTOR
GOVERNOR
CIRCUIT
fe
HD2 6V
ERASE HEAD ( MAGNET )
3:
J3
@ REMOTE JACK
A S2
\POWER SWITCH
J4
eta a’? EXT. POWER
AA’ CELLX4 = + JACK
6V i
pa Oe
—15- — =16-
es