Aiwa AD 6900 Mk2 Service Manual

Page 2

MODEL N0. AD-GQDUMKHH,U,E,K

DISASSEMBLY INSTRUCTIONS

1. To Remove Cassette Lid, Blinder and Cassette

Plate

1) Remove the cassette lid.

2) Remova the blinder.

3) Remove 2 screws. securing the cassette plate in place.
(Refer to Fig. 1)

2. To Remove Front Panel
1) Remove the connector.
2) Pull out the 13 knobs.
3) Remove 6 screws.
(Refer to Fig. 2)

AIWA

3. To Remove Mechanism

1) Remove 2 screws, securing the player shync circuit board
in place.

2) Remove 4 screws, securing the power transformer in
place.

3) Remove 2 screws, securing the power switch holder in
place.

4) Remove the counter belt and main belt.
5) Remove the rod stoppers and take out the selector rods.
(Refer to Fig. 3)

Selennv ma

m, Stopper. Rad

Mam molar
mew board

Fig. 3

6) RemovelOscrews,

(Refer to Fig. 4 and Fig, 5)
vTT+:z.sr 5
VTT@2.5~5
Wiener 5 $
\

fl

Fig. 4

Fig. 5

Page 11

ELECTRICAL MAIN PARTS LIST

Symbol No. Part No. Description Symbol No. Part No. Description
1
< REC/PB CIRCUIT BOARD SECTION > AR202 8702901601 229 AW Fuse resistor
PC B-A 82-328-601-01 REC/PB circuit board A R209 87-029-017-01 10$! /AW Fuse resistor
|C1,2 32304-68201 lc, TA7220 (P) Arum 87029-00701 2217 /.w Fuse resistor
01,2 89-314005-01 Transistor, 25C1400 (E) < Capacitors >
0314 8702744501 PEI-125 V 021,22 87015-32701 0.1uF 50v Electrolytic LL
05-6-73 39'312'222'01 T'animr- 230 IE) 0115,116 87068-41001 1000F 500v Dipped mica
10 035,36 87014-03301 100pF 15% PP
0103,104 89-318-154-01 Transistor, 2501815 (Y) 025.26 8701404701 3909,; $59,, PP
105" 017.18 82004-64801 0.01814F :22, PP
301,303
305,306 < FRTS CIRCUIT BOARD SECTION >
0201.202 89405-71201 Transistor, 250571 (Ll PC, 82-304007-31 Fm circuit board
203-25 101,2 87027-13701 10, TA-7122AP
0204 89-20605101 Transistor, 258605 (K) :3 8,027,235, 10, NJM-45580
0205 89405-71101 Transistor, 250571 (K) 01 2 3237162501 FET 2SK30 (0)
0206 8940234401 T'a"i°" 25'3 m 03.4.5.6 39012-22201 Transistor 2501222 (E)
0302 8941534301 T"°r 25C1634 8 078,12 39402-27501 Transistor, 250227 (vI
0307-308 3940247501 53" 230227 (VI 09,10,11 89-318-154-01 Transistor, 2501815 (Y)
309,310 13.14
0311312 89-320-011-01 Transistor, 2502001 (K) 012 874,274,101 Zane, diode, R0175
0401~414 3900945501 Transistor, 28C945L (0) 03,455 8702505601 Diode. M851 (0)
201203 370274534 Dude-1345 SFR1,2 87021-52501 Semi-fixed resistor, 3kn-B
0202 82'372'531'01 23"" me- X2315 SFR3 87021-48101 Semi-fixed resistor, mom-8
9204205 97°27'28 29"" dim 05243 SFFl4 8702143101 Semi-fixed resistor, sokn-B
0206.207 8702708301 Diode. 151885 SFRS 87-021-480-01 Semi-fixed resistor, 50kQ-B
203 SFRG 3702143401 Semi-fixed resistor, zokn-B
0209 87027-43601 Zener diode, H21 1 B1 Hm 8,031,397,), Pin, 3,,
0210 ' 87027-15901 Zener diode, 052-15u _
Diggfioli 87-026-069-01 Zener diode, W2052 R92 52.304.634.111 :7I:1esm°"1 3w cement resmor
0252.253 8702709701 Diode, 15555 < Canaan: >
301.302 049,50 87015-24101 1 11F 50v Electrolytic LL
305,308 057.58 8701524201 2.211F 50v Electrolytic LL
310.401 033,34 87015-24301 3.3uF 50v Electrolytic LL
402.403 053,54 87015-24601 4.7% 25v Electrolytic LL
L1,2,3.4 82371-622431 CD. 23mH 043.44 87015-24701 100F 25v Electrolytic LL
L101 ,102 82685-636431 Coil, GBmH c2'4 87-014-049-01 47091: 15% pp
L103,104 82-304-71401 Coil, 3.3mH
L105,106 82-304-715-01 Coil-3917M < PEAK METER CIRCUIT BOARD SECTION >
07-108 82'304'70101 CO": 22mI-I PCB-C 82-304-606-51 Peak meter circuit board
LPF101,102 32-397-634-01 Low-pass filter '01'3'101 37.027.133.01 IC, NUM-4558
OSC UNIT 82-328-602-01 080 unit .62 87027-18401 IC, p032;
RY1,89 84-184-612-01 Relay, HA212N (STOP MUTlNG) 01,2 85-107-505-01 Transistor, 2$A-750 (E)
VR7,8,9,10 82-304-623-11 Volume, 50km X 2, 20km x 1 03.4 370274 93.01 FET, steg (N)
13.14 (REC CAL: 3 5 ADJ) 05,5,78 37027-24501 FET, 2SK68A (NI
VR11,12.15 8280462441 Volumer 50m x 3 09,10,12 89-107-335-61 Transistor, 25A733 (K, P)
(REC CAL, BIAS FINE ADJ) 011,13,101 89-309-455-61 Transistor, 25c945 L (P, 0)
51,2 82-304-627-01 Lever switch (MONITOR, TEST) 102,103
53,4 8230402901 Lever switch (DOLBY-N R, BIAS) 104
$5 82-304-628-01 Lever switch (50) 01~8 87027-25301 Diode, M8513A (AlWA)
56.7.8 82-304-626-01 Push switch (PEAK HOLD, PEAK, 09,10,11 37.027.097.01 Diode, 131555
VU) 12,43,44
SFR1r2,3.4 87021-36301 Semi-fixed resistor. 47kn-B 041 82-371-647-01 Zener diode, RD-7.SE
105,108 01o1,102,103 88052-158-11 Diode, 15188 (FM)
SFR101,102 87021-36601 Semi-fixed resistor, 10kfl-B 104,105,105
103,104,252 Th1,2 82-304-721-01 Thermistor, 5m
SFR251 8702140601 Semi-fixed resistor, kn-B SFH1,2 87021-52201 Semi-fixed resistor, 1Mn-B
SFR253,254 87-021-367-01 Semi-fixed resistor. 100kne8 SFFI3,4 87021-52401 Semi-fixed resistor, 10kn-B
Th1,2 82-304-720-01 Thermistor. 1-7kfl SFR5,6 87021-51201 Semi-fixed resistor, 2kn-B
Th3.4 82-304-722-01 Thermistor. 20m SFR101,102 87-021-520-01 Semi-fixed resistor Ska-B
< new > FIN-3 87032-90401 Pin, 4P
113 R217 87029-10801 10 yew Fuse resistor PIN 37032-95323: :3". 2:
R218 87-029-067-01 4.7n 2w Fuse resistor Elli-2 8702:0301 PI: 8F

Symbol No. Part No. Description Symbol No. Part No. Doscription
< Capacitors > < VOLUME CIRCUIT BOARD-1 SECTION >
055,101,102 87015-37901 10F 50V Electrolytic BP PCB-l 82-304-605-11 Volume circuit hoard-1
C1 ,2,1 03,1 04 87015-38001 4.7uF 25V Electrolytic BP VFI5,6 82-304-622-01 Slide volume, 10kfl~A [OUTPUT
078 87014-08201 0.47pF 50V Mylar LEVEL)
< REMOTE CONTROL JACK CIRCUIT BOARD
< DOLBY-NR CIRCUIT BOARD SECTION > SECTION?
PCB-D 82-304-728-11 Dolby-NR circuit board PCBJ 82-307-653-11 Remote control jack circuit board
IC1,2 82-304-729-01 IC, CPI-713 J9 82-307-669-01 Connector
D1 82-371-647-01 Zener diode, RD-1.5 (E)
D3,4 88051-06001 Diode, 1N60 < SWITCH CIRCUIT BOARD SECTION >
87032-89801 IC socket. 1GP PCB-K 82-304-740-11 Switch circuit board ass'y
PIN 87032-64601 Pin, 16F D1,6 87026-11201 Light emitting diode, SEL-1033
< Resistor > IBED) . .
R9,10 82-371-652-01 33k yw t1% D2,3,4,5 87026-11301 'I-éggrtjmlmng diode, SEL-303E
< Capacitors >
C1,2 87-015-241-01 IMF 50V Electrolytic LL 2g DME CIRCUIT BOARD SECTION >
09,10 87015-24701 10;.1F 25v Electrolytic LL PCMl 823074555 01 DME aim, boa,
011,12 8207104301 4700pF 22% PP 0ME 8139754241 DME_101A
C3,4 82-371-642-01 5600pF t2% PP
€13.14 8287164101 00271": mi PP <5 METAL CIRCUIT BOARD SECTION >

PCB-E
IC1
lC2,3,4
Q1,2,3,4
5,6,10,12
07,9,
08
013
D1
D2,3,4,6,
78.9.11
12,16
D5
D10
013,14
D15
D17
D18
RY1,S18
RY2,S19
X1
PIN-6,7
PIN-22
PIN-5
PINB
PIN-8
FIN-4
PIN-10

A851

82-319-602-31
87027-42501
87-027426-01
89-309455-01

89404-14301
89402-34401
89309-45701
88052-1 88-11
8702709701

87027416431
870260694211
87-027-365-01
8702744001
87-0274 71-01
87027-09701
82-304-651-01
84-196-630-01
87008-18601
87032-90401
87032-90501
87032-90601
87032-90801
87032-90901
87032-91001
87-032-912-01

87029-015431

CUIT BOARD SECTION §>
Microprocessor circuit board
IC, uPD-54SC-66

IC, 151-2403

Transistor, ZSC945L IQ)

Transistor, 28D414 IQ)
Transistor, 250234 (Y)
Transistor, 2SC945L (K)
Diode, 15188 (FM)
Diode, 181555

Zener diode, H2302
Zener diode, W205?
Diode, $5277 15)
Zener diode, 05Z-6.2U
Zener diode, R02.7E
Diode, 151555
Relay. L

Relay, BR211AD
Ceramic, CSB4OOR1
Pin, 4P

Pin, 5P

Pin, 6P

Pin, 8P

Pin, 9P

Pin, 10F

Pin, 1217

< Resistor >
1051 1AW Fuse resistor

(E,K model only)

<

PCB-G
01
D1
DZ

82-304-753-01
89-309455-01
87027-36501
88-052-1 88-11

< VOLUME
PCB-H
VR1,2

VR3,4

82-304-591-21
82-304-880-1 1

82404-681 -1 1

Terminal circuit board
Transistor, 28C945L IO)
Diode, 852778

Diode, 15188 (FM)

CIRCUIT BOARD-2 SECTIONé>

Volume circuit board-2

Volume, 20kn-A

(MIC RECORD LEVEL)
Volume,50kfl-A [LINE RECORD
LEVEL)

PCB-0 82-304-752-01
L1,2 82-304-714-01
SFR12 87-021-366-01
P I N-1 9 87-032-903-01
Ple18,20 87-032-904-01

Metal circuit board

Coil, 3.3mH

Semi-fixed resistor, IOkn-B
Pin, 3P

Pin, 4P

PCB-P
Q1~6

82-304-713-11
89-318-154-01

< THERMISTOR CIRCUIT

PCB-0 82304-71901
Th1 82-304-720-01
Th2 132-304-721 -01

E0 circuit board
Transistor, ZSC1815 (Y)

BOARD SECTION >
Thermistor circuit board
ThermistO', 1.7m
Thermistor, 5km

PCB-R 82-307-640-21
ICI 87-027-355-01
1C2 87-027-235-01
1C3 87-027-300-01
O1 89-309-455-61
D2 88-052-188-11
D3 87-027-097-01
PIN-21 87-032-903-01

PCB-S 82-304-734-11
01 89-316-347-01
DI 87027-09701
RY1,S19 84-184-612-01
J5.6,7,8,10 82-304-737-01

RX circuit board

IC, LF357

IC, 4558

IC, 555 TIMER
Transistor,2SCQ45L (P.0l
Diode, 15183 (FM)
Diode, 131555

Pin, 3P

SECTION > = H,E,K model
Jack circuit board
Transistor,2SC1634 (7)

Diode, 131555

Relay, Reed HA212N

jack 4P w/DIN (LINE OUT
LINE IN, DIN)

SECTION >

Fuse circuit board (U,E,K model
only)

Fuse, 1.25/\ (U model only)

Fuse caution label (U model only)
Fase label lU model only)

Fuse, "T" 315mA (E,K model

only)

Fuse label, "T" 315mA (E,K model
only)

Fuse, "T" €30mA (E,K model
only)

A PCB-T 8200473101
A F1 87035-29801
87098-15601
87098-163431
A 535.6 87-035-107-01
87-098-011-01
AX F4 8703505301
8709801401

Fuse label, "T" 630mA (E,K model
only)

symbo

An

AFB

$C1
Acm

< VOL

= E,K r

PCB-U
A522

113822-12

AFI
AFQ

< VOL
= H mo
PCB-V

A522
AH

< MISC

T1

T1
Ah
A

01

RH,PH

EH

M1 ,PCB-

M2,PCB-l

LM1,2,3,

Aficm
PL3

50 L1
SO L2
J1 ,3.4
J5,6,778