Možno tento ....
SECTION 1
SERVICE
MANUAL
TABLE OF CONTENTS
I.
II.
III.
IV.
V.
VI.
VII.
TECHNICAL DATA
DISMANTLING OF UNIT
CONTROLS
PRINCIPAL PARTS LOCATION
LEVEL DIAGRAM
MAIN AMP ADJUSTMENT
..........................
CLASSIFICATION OF VARIOUS P.C BOARDS....................................
1. RELATION OF P.C BOARD TITLE AND IDENTIFICATION NUMBER
2. COMPOSITION OF VARIOUS P.C BOARD
2
3
4
4
5
5
6
6
. 7
For basic adjustments measuring methods, and operating principles, refer to GENERAL OPERATING
PRINCIPLES AND ADJUSTMENTS.
I. TECHNICAL DATA
1. Power Amplifier Section
Continuous Power Output
POWER BANDWIDTH (1HF)
SIGNAL TO NOISE RATIO (1HF)
RESIDUAL NOISE
CHANNEL SEPARATION (1HF)
DAMPING FACTOR
OUTPUT
20 watts per channel, minimum RMS, at 8 ohms from 20 to 20,000 Hz with no
more than 0.5% total harmonic distortion
10 to 45,000 Hz/8 ohms (Total Harmonic Distortion 0.5%)
Phono: Better than 85 dB
Aux: Better than 95 dB
Less than 0.8 mV at 8 ohms
Phono: Better than 55 dB at 1,000 Hz
More than 60 (1 kHz, 8 ohms)
Speakers: A,B (4 to 16 ohms)/A+B(8 to 16 ohms)
Headphone: 4 to 16 ohms
2. Pre Amplifier Section
INPUT SENSITIVITY AND IMPEDANCE
OUTPUT LEVEL AND IMPEDANCE
FREQUENCY RESPONSE
TONE CONTROL
LOUDNESS CONTROL
FILTER
Phono: 3 mV/47 k ohms
AUX: 150 m V/ 100 k ohms
Tuner: 150 mV/100 k ohms
Tape Monitor: PIN; 150 mV/100 k ohms DIN; 150 mV/100 k ohms
TapeREC: PIN; 150 mV/100 k ohms DIN; 150 mV/100 k ohms
Phono (RIAA equalization) 30 to 15,000 Hz +-1 dB
BASS: ±9 dB at 100 Hz, TREBLE: ±7 dB at 10 kHz
+10 dB at 100 Hz, +5 dB at 10 kHz
(Volume Control set at -30 dB position)
HIGH: -6 dB at 10 kHz, LOW: -6 dB at 50 Hz
3. Others
SEMICONDUCTORS
POWER REQUIREMENTS
DIMENSIONS
WEIGHT
Transistors: 18, Diodes: 5, IC: 1
U.S.A. and Canada model: 120V, 60 Hz
CEE models: 220V, 50 Hz
Other models: 110/220/240V, 50/60 Hz switchable
380(W) x 125(H) x 263(D) mm
( 1 5 x 4 . 9 x 10.3) inches
5.5 kg (12.1 IDS.)
NOTE: For improvement purposes, specifications and design are subject to change without notice.
II. DISMANTLING OF UNIT
In case of trouble, etc. necessitating disassembly, please disassemble in the order shown in photograph. Reassemble in
reverse order.
1
5
SCREWS
SCREWS
6
2
FRONT PANEL
CABINET
SCREWS
SCREWS
3
7
BOTTOM
PLATE
ADJUSTMENT
SCREWS
4
A
c
L)
t
VII. CLASSIFICATION OF VARIOUS P. C BOARDS
1. RELATION OF P.C BOARD TITLE AND IDENTIFICATION NUMBER
P.C Board
Number of P.C Board
Main Amp P.C Board
MFC P.C Board
LED P.C Board
m
icro
M2-5018/A
M2-5019
M2-5019A
VR P.C Board
M2-5019B
Headphone P.C Board
M2-5019C
M2-5022
Tone Control P.C Board
1) MAIN AMP P.C BOARD M2-5018/A, LED P.C BOARD M2-5019A
2. COMPOSITION OF VARIOUS P.C BOARD
3) VR P.C BOARD M2-5019B
WHT/CROSS BLK
M2-50.9
M2-5022
VOLUME
LOUDNESS
4) HEADPHONE P.C BOARDM2-5019C
ISPBl
5) TONE CONTROL P.C BOARD M2-5022
WHT/LONG BLU
BALANCE
2) MFC P.C BOARD M2-5019
[TAPE MONITOR]
SECTION 2
PARTS LIST
TABLE OF CONTENTS
RECOMENDED SPARE PARTS LIST
..............
...17
MAIN AMP P.C BOARD (M2-5018)
BLOCK...........
18
MFC P.C BOARD (M2-5019) BLOCK
......
................
18
VOL P.C BOARD (M2-5019B)
BLOCK................
.18
HEADPHONE P.C BOARD (M2-5019C) BLOCK.....................................18
TONE CONTROL P.C BOARD (M2-5022) BLOCK ..................18
ASSEMBLY BLOC...........................................................................................19
FINAL
ASSEMBLY
BLOCK..
......................
21
LIST OF JNTERCHANGEABLE SEMICONDUCTORS ................ 22
INDEX
OM
R
1.
2.
3.
4.
5.
6.
7.
8.
9.
....................................................................................
Resistor and Capacitor which is not listed in this parts list, please refer to
COMMON LIST FOR SERVICE PARTS.
23
HOW TO USE THIS PARTS LIST
1. This parts list is compiled by various individual blocks based on assembly process.
2. When ordering parts, please describe parts number, serial number, and model number in detail.
3. How to read list.
The reference number corresponds with illustration or photo number of that particular
parts list.
This number corresponds with the Figure Number.
This number corresponds with the individual parts index number
in that figure.
A small " x indicates the inability to show that particular part
in the Photo or Illustration.
Schematic Diagram Number of individual
manufactured part.
(not required for parts order)
Quantity of particular part required.
12-115x
Ref. No.
12-ll5x
12-116
12-117x
12-118
12-119
Parts No.
Description
Schematic
No Q'ty
FLYWHEEL BLOCK #13
800425 Flywheel Block Assy. Comp. RDG#13
244506 Flywheel Only
RD 233
244754 Felt, Flywheel
RD275
251324 Main Metal Case
RD 236
253080 Main Metal
RD237
RO
M
4. The symbol numbers shown on the P.C. Board list can be matched with the Composite Views
of components of the Schematic Diagram or Service Manual.
5. The indications of Resistors and Capacitors in the photos of P.C. Board are being eliminated.
6. The shape of the parts and parts name, etc. can be confirmed by comparing them with the parts
shown on the Electrical Parts Table of P.C. Board.
7. Both the kind of part and installation position can be determined by the Parts Number. To
determine where a parts number is listed, utilize Parts Index at end of Parts List.
It is necessary first of all to find the Parts Number. This can be accomplished by using the
Reference Number listed at right of parts number in the Parts Index, (meaning of ref. no.
outlined in Item 3 above).
8. Utilize separate " Price List for Parts " to determine unit price. The most simple method of
finding parts Price is to utilize the reference number.
CAUTION:
1. When placing an order for parts, be sure to list the parts no. model no., and description. There
are instances in which if any of this information is omitted, parts cannot be shipped or the
wrong parts will be delivered.
2. Please be careful not to make a mistake in the parts no. If the parts no. is in error, a part different from the one ordered may be delivered.
1. RECOMMENDED SPARE PARTS LIST
Parts No.
BA211263
BA211252
BA211274
BA211285
BA211432
BC224807
BD211230
BT225178
BT2 15043
BT215054
BT239591
ED656357
ED551733
ED656278
ED219903
EI697871
EJ650272
EJ698051
EJ225022
EJ240581
E0650823
ES225055
ES225088
ES224965
ES225044
ES219846
ES224436
ES239218
ES242346
ET219870
ET2 19881
ET223446
ET219868
ET219857
ET539987
EV573366
EV224943
EV224954
EV219835
SK224886
SK646817
SK634410
SK225090
SP224662
SZ645243
Parts Nomenclature
Multi Function P.C Board Comp. M2 5019
Main Amp P.C Board Comp. M2 5018
Volume P.C Board Comp. M2 5019B
Headphone P.C Board Comp. M2 5019C
Tone Control P.C Board Comp. M2 5022
Cabinet A M2 5013
Front Panel Block Comp. AM 2200(U)
Power Transformer AM 2200T 1
Power Transformer AM 2200T 2
Power Transformer AM 2200T 3
Power Transformer AM 2200T 4
Luminous Diode SEL105R
Silicon Varistor STV 4H
Silicon Diode 1S2472VE
Silicon Diode GP15D
IC LA3122
Pin Jack 14P JPJ379 1 1
Din Jack
Headphone Jack LJ255 1 12
Push Terminal 4P
Phase Equalizer Coil 2.2µH
Rotary Switch SR26N C30K
Push Switch 2F 0005FF3220
Push Switch 1FT 0004AF4920
Push Switch 2F 0002FF1620
Push Switch 3FT 0001FF6820
Power Switch JP01
Power Switch JP01 (TV 4)
Power Switch JP 17
Transsistor 2SD586 (Q)(R)
Transistor 2SB616 (Q)(R)
Transistor 2SC1571NP (G)(H)
Transistor 2SB560 (E)(F)
Transistor 2SD438 (E)(F)
Transistor 2SC1312R (F)(G)
Semi fixed Volume V10K8 4 2 200 ohmsB
Single axial 2 throw Volume V24L5G 3BM 250kx2
Single axial 2 throw Volume V16L4G 31Z 250kx2
Single axial 2 throw Volume V16L4 I5A 100kx2
Power Knob M2 5021
Single Knob AA 5250
Push Button Knob J 91 5051
Volume Knob M2 5015
Rear PanelA M2 5010
Circular Foot A CA 6014
RO
M
Reference No.
CSA
CEE
BEAB
Jl (Multi Function P.C Board)
J2 (Multi Function P.C Board)
Jl (Headphone P.C Board)
L1 (Main Amp P.C Board)
SW1 (Multi Function P.C Board)
SW2 (Multi Function P.C Board)
SW1 (Volume P.C Board)
SW1 (Headphone P.C Board)
SW1 (Power Switch)
CSA
CEE
VR1 (Main Amp P.C Board)
VR1 (Volume P.C Board)
VR2 (Volume P.C Board)
VR1 ,2 (Tone Control P.C Board)
2. MAIN AMP P.C BOARD (M2 5018) BLOCK
Symbol
No.
21
Parts No.
BA211252
2 2
BA270764
23
BA27077S
2
2
2
2
2
2
2
2
2
TR1.2 ET245790
TR3
ET219868
TR4
ET219857
TRS
ET219868
TR6
ET219857
TR7
ET219868
D1
ED656278
D2 to 5 ED219903
VR1
EV245823
2 L1
24
2 5
26
27
E0650823
EA233932
EA233943
EJ514822
EJ592503
2 R18.19 ER219914
2 C10
EC557155
2 C13
EC474671
Description
Main Amp P.C Board Comp.
(M2 5018)
Main Amp P.C Board Comp.
(M2 S018XCEE)
Main Amp P.C Board Comp.
(MS S018)(CSA)
Transistor 2SC1570NP (G)(H)
Transistor 2SB560 (E)(F)
Transistor 2SD438 (E)(F)
Transistor 2SB560 (E)(F)
Transistor 2SD438 (E)(F)
Transistor 2SB560 (E)(F)
Silicon Diode 1S2472
Silicon Diode GP15D
Semi fixed/Vol. V10K8 1 2
200 ohmsB
Phase Equalizer Coil 2.2 µH(K)
Transistor P.C Board (M2 5018A)
Transistor P.C Board A
(M2 5018A)(CSA)
Fuse Holder, P.C Board S N5051
Fuse Clip, P.C Board H0426
(CEE)
Metal Oxide Film/R. 2W
0.47 ohms (K)
Solid A l u m i n u m / C . 1µF(M)
10WV(Vert. Type)
FM/C. 10PF(K) 500WV
Q'ty
1
1
1
4
2
1
1
2
2
1
4
2
2
1
1
8
3
3
3
3
IC1
SW2
J1
J2
E1697871
ES225088
EJ650272
EJ698051
Description
Multi Function P.C Board Comp.
(M2 5019)
1C LA 3122
Push SW. 2F 0005FF3220
Pin Jack 14P JPJ379 1 1
Din Jack
4
RO
2
2
Q'ty
1
1
1
1
1
4. VOL P.C BOARD (M2 5019B) BLOCK
Symbol
No.
41
4 TR1
4 VR1
Parts No.
4 VR2
EV224954
4 SW1
4 C4
ES224965
EC5S7155
4 C7
EC223413
BA211274
ETS39987
EV224943
Description
Vol P.C Board Comp. (M2 S019B)
Transistor 2SC1312R(F)(G)
Single axial 2 throw Vol.
V24L5G 3BM 250kx2
Single axial 2 throw Vol.
V16L4G 31Z 250kx2
Push SW. 1FT 0004AF4920
Solid Aluminum/C. 1µF(M) 10WV
(Vert. Type)
Solid Aluminum/C. 1µF(M) 16WV
(Vert. Type)
Symbol
No.
51
Parts No.
Description
BA21128S
S J1
S SW1
5 R1.2
EJ225022
ES22S044
ER409814
Headphone P.C Board Comp.
(M2 S019C)
Headphone Jack
Push SW. 2F 0002FF1620
Metal Oxide Film/R. 2W
220 ohms (K)
Q'ty
1
2
1
1
1
2
2
Q'ty
1
1
1
2
6. TONE CONTROL P.C BOARD (M2 5022)
BLOCK
Symbol
No.
61
Parts No.
Description
Tone Control P.C Board Comp.
(M2 5022)
6 VR1.2 EV219835 Single axial 2 throw Vol. V16L4
20A 100kx2
6 SWl
ES219846 Push SW. 3FT 0001FF6820
6 C4
EC219813 Solid Aluminum/C. 0.1 µF(M)
10WV (Vert. Type)
8
3. MFC P.C BOARD (M2 5019) BLOCK
Symbol
No. Parts No.
31
BA211263
5. HEADPHONE P.C BOARD (M2 5019C)
BLOCK
M
Q'ty
BA211432
1
2
1
2
Symbol
7.) ASSEMBLY BLOCK
Ref.
No.
Parts No.
7 1
7 2x
7 3x
7 4x
7 Sx
7 6x
HEAT SINK
BZ211241
ET219870
ET219881
ZS379350
ED551733
ZS608332
7 7x
ZS447840
Description
No
Schematic
No.
BLOCK
Heat sink Block Comp.
Transistor 2SD586 (Q)(R)
Transistor 2SB616 (Q)(R)
Screw, pan head 3x6
Varistor STV 4H
Screw, pan head 3x8,
w/washer
Tapping Screw #2 3x8(BR)
45 1 236
45 1 237
45 10 10
Q'ty:
1
2
2
8
2
Parts No.
Description
7 S6x MZ229138 Wire Bundle Holder N 108
(CEE, CSA) 2 35 1
7 S7x ZS447840
Tapping Screw #2 3x8 (BR)
(CEE, CSA)
2
4
REAR PANEL BLOCK
78
7 9x
7 10x
7 11
7 12
7 1 3x
7 14
7 15
7 16
7 17
7 18
EZ224662
EZ224706
EZ224717
EZ225145
EW540123
EW604S85
EZ631945
SK652397
ZW652408
EJ240581
ZS52286S
Rear Panel A
Rear Panel B (CSA)
Rear Panel C (CEE)
2 throw AC Outlet
AC Cord (CUL) 2.5M
AC Cord BSI
Strain Relief SR 4N 4
Knob OS 12 2
Washer (SPC) D3.2xlOxO.5t
4P Push Terminal
Tapping Screw #2 3xl2(BR)
7 19
7 20x
7 2 lx
7 22
7 2 3x
7 24x
7 25x
ASSEMBLY
ZS32S495
ZS379350
ZW273802
ES224436
ES242346
ES239218
EC684720
BLOCK
Tapping Screw #2 3x6 (BR)
Screw, pan head 3x6
Toothed Lock Washer M3
Push SW, JP01
Push SW. JP17 (CEE)
Push SW. JP01(TV 4) (CSA)
Ceramic/C. CLD16YE
0.01µF(P) 500WV
Ceramic/C. DP6600YM
0.01µF(P) 1.4 kWV (CSA)
Nylon Rivet (FNPR) 3x5.5
(Black)
Nylon Rivet (FNPR) 4x5
(Black) (CEE, CSA)
Tapping Screw #2 3x6 (BR)
(Black)
3P Fuse Holder (Large) B
(Lupping Type)
Rotary SW. SR26N C30K
Power Trans. AM 2200T 1
Power Trans. AM 2200T 3
(CEE)
Power Trans. AM 2200T 2
(CSA)
Spring Washer M4
Nut M4, #1
Wrapping Terminal, 4P T S251
LED P.C Board
LED SEL 105R
Bottom Plate A
Tapping Screw #2 3x8 (BR)
Fuse ST 2 2A
Fuse (SEMKO T Type)
1.2SAT 250V (CEE)
Fuse ST 1 2A (CSA)
Fuse (SEMKO T Type) 4AT
(CEE)
Fuse ST 1 4A (CSA)
Fuse (SEMKO T Type) 1AT
(CEE)
Fuse 2 A 2 5 0 V
Wire Band Plate (CEE.CSA)
Fuse Holder, w/sticker
AM 2S (CEE)
Fuse Holder, w/sticker
AM 2L(CSA)
Earth Lug M4 (CEE)
Toothed Lock Washer M4
(CEE)
Nut M4 #l(CEE)
7 2 6x ECS65896
7 27
ZW698308
7 28x ZW239578
7 29
ZS447761
7 30x EJ214975
7 31 ES225055
BT225178
7 32
7 33x BT215054
7 34x BT2 15043
7
7
7
7
7
7
7
7
7
35x
36x
37x
38
39
40
41 x
42 x
43x
ZW273914
ZW413188
EJ551035
EA224515
ED656357
SP224831
ZS447840
EF277413
EF607550
7 44x EF332098
7 45 x EF690996
7 46x EF552846
7 47x EF623103
7 48x EF563703
7 49 X TA239567
7 5 Ox EJ239580
7 5 lx EJ239477
7 5 2 X ZW273881
7 53x ZW273892
7 54x ZW413188
M2 5010
M2 5010
M2 5010
31 1 166
26 3 20
26 3 37
2 7 49
34 1 4
32 1 72
25 5 221
25 5 224
25 5 222
1
1
1
1
1
1
1
1
1
2
4
9
11
1
1
1
1
24 5 61
1
24 5 58
1
2 7 54
2 7 58
RO
4
M
1
1
38 4 433
1
1
1
38 4 447
1
38 4 446
1
4
4
2
1
1
1
5
4
40 1 104
25 6 95
32 1 36
M2 5019A
45 15 11
M2 5014
39 1 26
39 1 53
39 1 25
39 1 53
39 1 25
1
1
2
2
39 1 50
M2 5024
4
1
1
40 1 141
1
40 1 119
1
1
39 1 53
Schemati
1
'
When ordering parts,please describe Parts Number, Descriptor, and Model Number in detail
2
1
8. PHOTO OF FINAL ASSEMBLY BLOCK
8.) FINAL ASSEMBLY BLOCK
Ref.
No.
Parts No.
8-lx
8-2
8-3
BD211230
MZ224627
SE613888
8-4x
8-5x
8-6
8-7x
8-8
8-9
8-10
8-11
8-12
8-13
SZ64S243
ZS214997
BC224807
BC266782
ZW548010
ZS510344
SK224886
SK634410
SK22S090
SK646817
Description
Schematic
No.
Q'ty
FRONT PANEL BLOCK
Front Panel Block Comp.
Push Button Bush A
Button Escutcheon A
M2-5004
CW-6021
1
8
Circular Foot A
CA-6014
Tapping Screw, #2 4x6 pan
Cabinet A
M2-5013
Cabinet C (CSA)
M2-50I3
Spot Facing Washer
MU-6028
Screw, binding head 4x12
Power Knob
M2-5021
Push Button Knob J
91-5051
Vol. Knob
M2-5015
Single Knob
AA-5250
4
4
1
1
4
4
1
8
1
4
ASSEMBLY BLOCK
9. LIST OF INTERCHANGEABLE SEMICONDUCTORS
As far as service is concerned, in case the original parts cannot be obtained, the interchangeable parts listed below can
be substituted.
2SB560(E)(F)
2SB616(Q)(R)
2SC1312(F)(G)
2SC1517NP(G)(H)
2SD438(E)(F)
2SD586(Q)(R)
LA3122
1S2472VE
GP15D
SEL105R
STV-4H
ET2 19868
ET2 19881
ET539987
Utilizing P.C Board
M2-5018
M2-8018A
M2-5019B
M2-5018
M2-5018
OM
R
Description
Original Parts
Parts No.
Interchangeable Parts
Description
Parte No.
2SA815(O)(Y)
ET649078
j
2SC1571NP(G)(H)
2SC1312(F)(G)
2SC1625(O)(Y)
ET223446
ET539987
ET649067
ED656278
M2-5019
M2-5018
1S2472
ED656278
ED2 19903
M2-5018
1R5BZ61
ED650621
ED656357
M2-5019A
ET223446
ET2 19857
ET2 19870
EI697871
ED551733
M2-5018A
INDEX
Ref. No. &
Ref. No. &
No.
Parts No.
BA211252
BA211263
BA211274
BA211285
BA211432
BA270764
BA27077S
BC224807
BC266782
BD211230
2-1
3-1
4-1
5-1
6-1
2-2
2-3
8-6
8-7x
8-lx
SK224886
SK225090
SK634410
SK646817
SK652397
SP224831
SZ645243
TA239567
ZS214997
ZS32549S
8-10
8-12
8-11
8-13
7-15
7-40
8-4x
7-49x
8-5x
7-19
BT215043
BT21S054
BT225178
BZ211241
EA224515
EA233932
EA233943
EC219813
EC223413
EC474671
7-34x
7-33x
7-32
7-1
7-38
2-4
2-5
6-C4
4-C7
2-C13
ZS379350
ZS379350
ZS417150
ZS447761
ZS447840
ZS447840
ZS447840
ZS510344
ZS522865
ZS608332
7-4x
7-20x
7-S5x
7-29
7-7x
7-41x
7-57x
8-9
7-18
7-6x
EC557155
EC557155
EC565896
EC684720
ED219903
ED551733
ED656278
ED656357
EF277413
EF332098
2-C10
4-C4
7-26x
7-25x
2-D2to5
7-5x
2-D1
7-39
7-42x
7-44x
ZW239578
ZW273802
ZW273881
ZW273892
ZW273914
ZW413188
ZW413188
ZW548010
ZW652408
ZW698308
7-28x
7-21x
7-52x
7-53x
7-35x
7-36x
7-54x
8-8
7-16
7-27
EF552846
EF563703
EF602550
EF623103
EF690996
EI697871
EJ214975
EJ225022
EJ239477
EJ239580
7-46x
7-48x
7-4 3x
7-47x
7-45x
3-IC1
7-30x
5J1
7-5lx
7-SOx
EJ240581
EJ5 14822
EJ551035
EJ592503
EJ650272
EJ698051
EO650823
ER219914
ER409814
ES219846
7-17
2-6
7-37x
2-7
3-J1
3-J2
2-L1
2-R18.19
5-R1.2
6-SW1
ES224436
ES224965
ES225044
ES225055
ES225088
ES239218
ES242346
ET219857
ET219857
ET219868
7-22
4-SW1
5-SW1
7-31
3-SW2
7-24x
7-2 3x
2-TR4
2-TR6
2-TR3
ET219868
ET2 19868
ET219870
ET2 19881
ET24S790
ET539987
EV219835
EV224943
EV224954
EV245823
2-TR5
2-TR7
7-2x
7-3x
2-TR1.2
4-TR1
6-VR1.2
4-VR1
4-VR2
2-VR1
EW540123
EW604S85
EZ224662
EZ224706
EZ224717
EZ225145
EZ631945
MZ224627
MZ229138
SE613888
7-12
7-13x
7-8
7-9x
7-10x
7-11
7-14
8-2
7-56x
8-3
Parts No.
Symbol
Symbol
No.
Parts
No.
Ref.
RO
M
No
Parts No.
Ref. No. &
Symbol No.
Ref.No. &
Symbol N
COMPOSITION OF VARIOUS P.C BOARD
MAIN AMP P.C BOARD M2-5018/A, LED P.C BOARD M2-5019A
E C B
E C B
2SCI570NP
M2-50I9
M2-50I9B
M2-5022
2SB560
2SD438
POWER TRANS
M2-50I9C(
M2-50I9C
TR9b 2SB6l6(Q)(R)
TR8b2S0586(O)(R)
TR8 2 S 0 5 8 6 ( 0 ) ( R )
TR9 2SB6I6(Q)(R)
M2-50I9B
VR P.C BOARD'M2-5019B
WHT/CROSS BLK
M2-50I9
M2-5018
-5019
5022
BALANCE
LOUDNESS
VOLUME
HEADPHONE P.C BOARD M2-5019C
SPA
HEAD PHONE
TONE CONTROL P.C BOARD M2-5022
WHT/LONG B L U
M2-50I9B
LOW FILTER
HIGH FILTER
MODE