Pioneer FX-MG8506ZT User manual

ORDER NO.
CRT2548
PUB. NO. CRT2548
AUDIO SYSTEM
HEAD UNIT
Manufactured for TOYOTA
by PIONEER CORPORATION
VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No.
LEXUS LS430 EUROPE August 2000 86120-50610 P3900 FX-MG8506ZT/EW
LEXUS LS430 EUROPE August 2000 86120-50770 P3900 FX-MG8506ZT-91/EW
LEXUS LS430 UNITED KINGDOM August 2000 86120-50620 P3901 FX-MG8606ZT/EW
LEXUS LS430 UNITED KINGDOM August 2000 86120-50780 P3901 FX-MG8606ZT-91/EW
LS430
Service
Manual

2
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
-Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
FX-MG8506ZT/EW
-Supplementary model is identical to the original except for the addition of following items.
Description Part No.
FX-MG8506ZT-91/EW FX-MG8606ZT-91/EW
Polyethylene Bag CEG1026 CEG1026
Carton CHA4120 CHA4120
Contain Box CHL4120 CHL4121
Protector(TOP) CHP2319 CHP2319
Protector(BOTTOM) CHP2320 CHP2320
FX-MG8606ZT/EW
ID No.P3900 ID No.P3901
-This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-631 CRT1640 2L Cassette Mech. Module:Mech.Description, Disassembly
CX-890 CRT2376 G1 CD Mech. Module:Circuit Description, Mech.Description, Disassembly
CONTENTS
1. SAFETY INFORMATION ............................................4
2. EXPLODED VIEWS AND PARTS LIST.......................5
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...16
4. PCB CONNECTION DIAGRAM ................................44
5. ELECTRICAL PARTS LIST ........................................66
6. ADJUSTMENT..........................................................72
7. GENERAL INFORMATION .......................................75
7.1 DIAGNOSIS.......................................................75
7.1.1 TEST MODE.............................................75
7.1.2 DIAGNOSIS MODE .................................80
7.1.3 DISASSEMBLY ........................................84
7.1.4 PCB LOCATIONS .....................................89
7.1.5 CONNECTOR FUNCTION DESCRIPTION ..90
7.2 IC........................................................................91
7.3 EXPLANATION..................................................96
7.3.1 SYSTEM BLOCK DIAGRAM ...................96
7.3.2 OPERATIONAL FLOW CHART................98
8. OPERATIONS AND SPECIFICATIONS.....................99

3
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
-CD Player Service Precautions
1. For pickup unit(CXX1313) handling, please refer
to"Disassembly"(see page 84).
During replacement, handling precautions shall be
taken to prevent an electrostatic discharge(protection
by a short pin).
2. During disassembly, be sure to turn the power off
since an internal IC might be destroyed when a con-
nector is plugged or unplugged.
3. Please checking the grating after changing the ser-
vice pickup unit(see page 73).
-When the Repair is Complete
When the repair is complete, make the CD mechanism
ready for transportation
Bup On, Acc OFF
SEEK/TRACK UP+
DISC(CD)+Acc ON
Bup OFF, Acc OFF
Shift completion to the transportation mode.
Disc loading slot illumination : Lighting
Disc loading slot illumination : Blinking The mode is shifting to the transportation mode.

4
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
1. SAFETY INFORMATION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely; you should not risk trying to do so
and refer the repair to a qualified service technician.
1. Safety Precautions for those who Service this Unit.
• When checking or adjusting the emitting power of the laser diode exercise caution in order to get safe, reliable
results.
Caution:
1. During repair or tests, minimum distance of 13cm from the focus lens must be kept.
2. During repair or tests, do not view laser beam for 10 seconds or longer.
2. A “CLASS 1 LASER PRODUCT” label is affixed to the
bottom of the player.
3. The triangular label is attached to the mechanism
unit holder.
4. Specifications of Laser Diode
Specifications of laser radiation fields to which human access is possible during service.
Wavelength = 800 nanometers
CLASS 1
LASER PRODUCT

FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR(FX-MG8506ZT/EW,FX-MG8506ZT-91/EW)
5
35
NOTE:
Please use the gray part shown in figure above cut-
ting off when you exchange the rubber(CNV5881)
for new parts.

6
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91

FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
1 Screw BMZ26P040FMC
2 Screw BMZ26P050FMC
3 Screw BMZ50P080FMC
(FX-MG8506ZT/EW)
4 Connector CDE6172
5 Case CNB2541
6 90468-04191 CNC9048
7 Cushion CNM6917
8 Guide CNV6044
9 Main Unit CWM6848
10 Screw BMZ30P060FMC
11 Screw(M3x6) CBA1393
12 Terminal(CN806) CKF1059
13 Connector(CN802) CKM1315
14 Connector(CN801) CKM1322
15 Plug(CN303) CKS-291
16 Connector(CN301) CKS3568
17 Connector(CN804) CKS3751
18 Connector(CN701) CKS3930
19 Holder CNC8163
20 Screw BPZ20P080FMC
21 Button(MODE) CAC5958
22 Button(EJECT) CAC5960
23 Button(SEEK) CAC6356
24 Button(CH) CAC6357
25 Button(TA) CAC6351
* 26 Lighting Conductor Unit CXB6916
27 Holder Unit CXB6898
28 Lighting Conductor CNV5683
29 Lighting Conductor Unit CXB6915
30 Holder CNV6039
31 Lighting Conductor Unit CXB6899
32 Keyboard Unit CWM6860
33 Connector(CN902) CKS3751
34 Connector(CN903) CKS4354
35 Rubber CNV5881
36 Knob Unit CXB3551
37 Grille Unit CXB6893
38 Chassis Unit CXB3549
39 Door CAT2103
40 Spring CBH2427
41 Screw BPZ20P080FMC
42 Button(LOAD) CAC5968
43 Button(EJECT) CAC5969
44 Connector CDE6293
45 Lighting Conductor CNV6638
46 SW Unit CWM6872
47 Connector(CN905) CKS4354
48 Grille Unit CXB6927
49 Screw BPZ20P080FMC
50 Door CAT2151
51 Washer CBF1037
52 Spring CBH2339
53 Gear CNV6116
54 Bracket Unit CXB5254
55 Screw IMS20P030FMC
56 86208-50010 CXB6031
(FX-MG8506ZT/EW)
57 86207-50010 CXB6032
(FX-MG8506ZT/EW)
58 Screw BMZ20P020FMC
59 Screw BMZ26P030FMC
60 Cassette Mechanism Module EXK3885
61 Transistor(Q809,811,812) 2SB1185
62 Screw(M2x2) CBA1250
63 Spring CBH2361
64 Spring CBH2365
65 Spring Unit CXB6850
66 Connector CDE6302
67 Chassis CNA2131
68 Holder CNC7477
69 Holder CNC7826
70 Holder CNC8160
71 Holder CNC8161
72 Holder CNC8162
73 Connector(CN803) CKM1065
74 Sheet CNM5981
75 Insulator CNM7141
76 Sheet CNM6318
77 Insulator CNM6410
78 Cushion CNM6927
79 PCB CNP5399
80 Damper CNV5120
81 Holder CNV5543
82 Screw IMS20P040FMC
83 Mechanism Assy(Service) CXX1430
84 Screw ISS26P050FMC
85 Screw ISS26P060FMC
* 86 Seal CNM5714
87 Rubber CNV6596
88 Spacer CNM7140
89 Spacer CNM7179
-EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
NOTE:
-Parts marked by "*"are generally unavailable because they are not in our Master Spare Parts List.
-Screws adjacent to ∇mark on the product are used for disassembly.
7

8
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
2.2 EXTERIOR(FX-MG8606ZT/EW,FX-MG8606ZT-91/EW)
35
NOTE:
Please use the gray part shown in figure above cut-
ting off when you exchange the rubber(CNV5881)
for new parts.

9
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91

10
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
1 Screw BMZ26P040FMC
2 Screw BMZ26P050FMC
3 Screw BMZ50P080FMC
(FX-MG8606ZT/EW)
4 Connector CDE6172
5 Case CNB2541
6 90468-04191 CNC9048
7 Cushion CNM6917
8 Guide CNV6044
9 Main Unit CWM6849
10 Screw BMZ30P060FMC
11 Screw(M3x6) CBA1393
12 Terminal(CN806) CKF1059
13 Connector(CN802) CKM1315
14 Connector(CN801) CKM1322
15 Plug(CN303) CKS-291
16 Connector(CN301) CKS3568
17 Connector(CN804) CKS3751
18 Connector(CN701) CKS3930
19 Holder CNC8163
20 Screw BPZ20P080FMC
21 Button(MODE) CAC5958
22 Button(TA) CAC6351
23 Button(CH) CAC5961
24 Button(SEEK) CAC5962
25 Button(EJECT) CAC5960
* 26 Lighting Conductor Unit CXB6916
27 Holder Unit CXB6898
28 Lighting Conductor CNV5683
29 Lighting Conductor Unit CXB6915
30 Holder CNV6039
31 Lighting Conductor Unit CXB6899
32 Keyboard Unit CWM6859
33 Connector(CN902) CKS3751
34 Connector(CN903) CKS4354
35 Rubber CNV5881
36 Knob Unit CXB3551
37 Grille Unit CXB6891
38 Chassis Unit CXB3549
39 Door CAT2101
40 Spring CBH2427
41 Screw BPZ20P080FMC
42 Button(EJECT) CAC5969
43 Button(LOAD) CAC5968
44 Connector CDE6293
45 Lighting Conductor CNV6638
46 SW Unit CWM6872
47 Connector(CN905) CKS4354
48 Grille Unit CXB6927
49 Screw BPZ20P080FMC
50 Door CAT2151
51 Washer CBF1037
52 Spring CBH2339
53 Gear CNV6116
54 Bracket Unit CXB5254
55 Screw IMS20P030FMC
56 86208-50010 CXB6031
(FX-MG8606ZT/EW)
57 86207-50010 CXB6032
(FX-MG8606ZT/EW)
58 Screw BMZ20P020FMC
59 Screw BMZ26P030FMC
60 Cassette Mechanism Module EXK3885
61 Transistor(Q809,811,812) 2SB1185
62 Screw(M2x2) CBA1250
63 Spring CBH2361
64 Spring CBH2365
65 Spring Unit CXB6509
66 Connector CDE6302
67 Chassis CNA2131
68 Holder CNC7477
69 Holder CNC7826
70 Holder CNC8160
71 Holder CNC8161
72 Holder CNC8162
73 Connector(CN803) CKM1065
74 Sheet CNM5981
75 Insulator CNM6127
76 Sheet CNM6318
77 Insulator CNM6410
78 Cushion CNM6927
79 PCB CNP5399
80 Damper CNV5120
81 Holder CNV5543
82 Screw IMS20P040FMC
83 Mechanism Assy(Service) CXX1430
84 Screw ISS26P050FMC
85 Screw ISS26P060FMC
* 86 Seal CNM5714
87 Rubber CNV6596
88 Spacer CNM7140
89 Spacer CNM7179
-EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

11
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
2.3 CD MECHANISM

12
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
1-9 •••••
10 CD Core Unit(Servo Unit) CWX2421
11 Connector(CN101) CKS2764
12 Connector(CN301) CKS3966
13 Connector(CN201) CKS3991
14 CD Core Unit(STS Unit) CWX2422
15 Connector(CN701) CKS3989
16 Connector(CN801) CKS3989
17 Connector(CN802) CKS4054
18 Screw CBA1037
19 Screw CBA1041
20 Screw CBA1076
21 Screw CBA1250
22 Washer CBA1512
23 Screw CBA1452
24 Screw CBA1453
25 Screw CBA1479
26 Washer CBF1037
27 Washer CBF1038
28 Washer CBF1039
29 Washer CBF1064
30 Spring CBH2007
31 Spring CBH2271
32 Spring CBH2274
33 Spring CBH2014
34 Spring CBH2015
35 Spring CBH2016
36 Spring CBH2017
37 Spring CBH2290
38 Spring CBH2366
39 Spring CBH2064
40 Spring CBH2195
41 Spring CBH2196
42 Spring CBH2224
43 Spring CBH2250
44 Screw CBA1082
45 Roller CLA3154
46 Roller CLA3157
47 Roller CLA3159
48 Roller CLA3160
49 Shaft CLA3179
50 Spacer CLA3194
51 Roller CLA3248
52 Bush CLA3353
* 53 Shaft CLA3469
54 Shaft CLA3693
55 Steer CNC7215
56 Steer CNC7216
57 Cam CNC8774
* 58 Holder CNC7235
59 Gear CNC7236
60 Gear CNC8883
61 Lever CNC7243
62 Lever CNC7244
63 Lever CNC7245
64 Lever CXB4944
65 Cover CNC7441
66 Holder Unit CXB4946
67 Lever CNC9088
68 Gear CNC8140
69 Sheet CNM6840
70 PCB CNP5764
71 PCB CNP6010
72 Gear CNR1479
73 Gear CNR1481
74 Gear CNR1495
75 Gear CNR1501
76 Gear CNR1502
77 Gear CNR1540
78 Gear CNR1541
79 Belt CNT1080
80 Worm Gear CNV5046
81 Gear CNV5047
82 Gear CNV5048
83 Gear CNV5049
84 Holder CNV5056
85 Pulley CNV5058
86 Arm CNV5061
87 Spacer CNV5066
88 Arm CNV5189
89 Cover CNV5207
90 Cover CNV5424
91 Cover CNV5425
92 Lever CNV5427
93 Arm CNV5491
94 Gear CNV5519
95 Holder CNV5648
96 Composite PCB CNX3327
97 Composite PCB CNX2989
98 Chassis Unit CXB5940
99 Frame Unit CXB5806
100 Lever Unit CXB6026
101 Arm Unit CXB2704
102 Lever Unit CXB2708
103 Lever Unit CXB2709
-CD MECHANISM SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

13
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
104 Lever Unit CXB4949
105 Arm Unit CXB2712
106 Lever Unit CXB4948
107 Lever Unit CXB2714
108 Carriage Mechanism Unit(G1) CXB4941
109 Screw CBA1041
110 Screw CBA1250
111 Screw CBA1362
112 Screw CBA1471
113 Washer CBF1038
114 Spring CBH2008
115 Spring CBH2009
116 Spring CBH2010
117 Spring CBL1335
118 Roller CLA3913
* 119 Bracket CNC7228
120 Guide Unit CXB4417
121 Cover CNC7628
122 Sheet CNM6414
123 Sheet CNM5378
124 •••••
125 Sheet CNM5827
126 PCB CNP4978
127 Ball CNR1189
128 Bearing CNR1423
129 Belt CNT1079
130 Holder CNV5037
131 Guide CNV5040
132 Clamper CNV5042
133 Rack CNV5111
134 Arm CNV5579
135 Holder CNV5759
* 136 Chassis CXB6025
137 Arm Unit CXB2705
138 Motor Unit(M4 CARRIAGE) CXB3178
139 Screw Unit CXB3179
140 Lever Unit CXB4450
141 Bracket CNC8584
142 Spacer CNM6345
143 Motor(M5 SPINDLE) CXM1120
144 Screw JFZ14P020FZK
145 Washer YE15FUC
146 Arm Unit CXB6052
147 Arm Unit CXB6053
148 Tray Assy CXB4307
149 Spring CBH2269
150 Sheet CNM7109
151 Cam Motor Assy CXB6928
152 •••••
* 153 Bracket Unit CXB5201
* 154 Motor Unit(M1 Cam Gear) CXB6929
* 155 Motor Unit(M3 ELV) CXB3175
156 Screw JFZ20P025FMC
157 Loading Arm L Assy CXB3171
158 Loading Arm L Assy(Service)CXX1415
159 Screw CBA1453
160 Washer CBF1038
161 Loading Arm R Assy(Service)CXX1457
162 Washer CBF1074
163 Spring CBH2136
* 164 Arm CNC7241
* 165 Arm CXB4449
166 Holder CBL1508
167 Belt CNT1079
168 Holder CNV5055
169 Pulley CNV5057
170 Roller CNV6209
171 Guide CNV5125
* 172 Bracket Unit CXB5937
173 Roller Gear Unit CXB3176
* 174 Motor Unit(M2 LOAD) CXB3177
175 Screw JFZ14P020FMC
176 Loading Arm R Assy CXB5839
177 Screw CBA1453
178 Washer CBF1074
179 Spring CBH2136
* 180 Arm CNC7242
* 181 Arm CXB5822
182 Screw JFZ20P014FMC
183 Roller CNV6209
184 Roller Gear Unit CXB3176
185 Guide CNV5126
186 Switch(S885 MAX DETECT) CSN1052
187 LED(D883) CL202IRXTU
188 Photo-transistor(Q881) CPT230SCTD
189 LED(D891,892) CL202IRXTU
190 Switch(S887 CLAMP) CSN1051
191 Switch(S886 ELV HOME) CSN1052
192 Bracket Unit CXB6086
193 Photo-transistor(Q851,852) CPT230SCTD
194 Resistor(R856) RS1/8S911J
195 Resistor(R857) RS1/8S821J
196 Photo-interrupter(Q1) RPI-221
197 Screw CBA1387
198 Pickup Unit(Service)(P8) CXX1313
199 Spring CBL1467
200 Bracket CNC8902
201 Connector CDE6302
202 Screw CBA1015
Mark No. Description Part No. Mark No. Description Part No.

14
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
2.4 CASSETTE MECHANISM MODULE

15
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
1 Screw BSZ20P040FMC
2 Washer CBF1037
3 Washer CBF1038
4 Washer CBG1003
5 Deck Unit EWM1027
6 Screw(M2x5) EBA1028
7 Screw(M2x2.5) EBA1037
8 Spring EBH1531
9 Spring EBH1589
10 Connector(CN251) CKS3540
11 Spring EBH1515
12 Spring EBH1587
13 Spring EBH1517
14 Spring EBH1518
15 Spring EBH1519
16 Spring EBH1537
17 Cord EDD1027
18 Photo-interrupter(EGN2,3) EGN1006
19 Photo-interrupter(EGN1) EGN1005
20 Roller ENR1031
21 Shaft ELA1362
22 Roller ELA1348
23 Arm ENC1490
24 Arm ENC1397
25 Guide ENC1519
26 Holder ENC1516
27 Lever ENC1448
28 Arm ENC1488
29 Roller ENR1023
30 Belt ENT1027
31 Gear ENV1347
32 Collar ENV1508
33 Gear ENV1350
34 Flywheel ENV1500
35 Worm Gear ENV1439
36 Worm Wheel ENV1440
37 Gear ENR1037
38 Lever ENV1533
39 Arm ENV1525
40 Gathering PCB ENX1037
41 Gathering PCB ENX1060
42 Switch(S1)(S2) ESG1004
43 Motor Unit(M2)(SUB) EXA1382
44 Chassis Unit EXA1559
45 Tube ENM1039
46 Roller ENR1027
47 Reel Unit EXA1560
48 Head Base Unit EXA1434
49 Lever Unit EXA1578
50 Gear Unit EXA1545
51 Frame Unit EXA1476
52 Lever Unit EXA1439
53 Head Assy(HD1) EXA1594
54 Motor Unit(M1)(MAIN) EXA1499
55 Washer HBF-179
56 Screw JGZ20P025FNI
57 Spring EBH1545
58 Washer YE20FUC
59 Pinch Roller Unit EXA1533
60 Pinch Roller Unit EXA1532
61 Capacitor(C1) CEAL4R7M35
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM MODULE SECTION PARTS LIST

16
A
1234
B
C
D
1234
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM(FX-MG8506ZT/EW)
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
8.5V
BU
60
59
58
57
78
77
76
ELV1
ELV2
LO1
LO2
PH2
PH1
PH3
LOAD
ELHOME
CLAMP
55
6
CG1
CG2
62
61
POWER
26
Q702
Q301
CD MUTE
DOORSW
LOADSW
MODESW
79
ELVSNS
TAPEB
TL
BUS
LOAD
PH1
PH2
PH3
LO2
LO1
ELV2
ELV1
CG2
CG1
elvsns
POWER
CONT
EMPH
VD
Lch
3
1
2
8
7
39
6
5
4
48
49
46
47
44
45
50
41
16
12
42
VD CD9V
43
9
CN701
BUCD9V
CN251 CN301
CN252
CN253
IC251
HA12216F
TAPE EQUALIZER
MECHANISM DRIVER
IC351
PA2020A
Q271
B.U
B.U
M
SUB
MOTOR
M
MAIN
MOTOR
10
+B
TAPE-L
MTL
MTL
VR301
VREF
6
22
14
17
2
51
53
17
7
18
19
5
2
NR
Q351
Q352
1
9
8
STBY
LOAD
LOAD
SWITCH
70µs
SWITCH
MODE
SENSE
FWD
SENSE
REV
SENSE
1
4
5
4
3
20
4
3
20
FWD
LcH
REV
LcH
23
8
1
64
23
8
1
64
Q854
Q809
CD9V
AUDIO8.5V
BU
VDD ILL8V BU
BU
BU8.5V Q852
Q817 Q816
Q808
Q856
Q804
VDD REGULATOR ILL8V REGULATOR
SW5V
Q811
Q813
Q812
Q814
40 CD5V EREF
75
VDCONT
SW5V
DECK UNIT
PCB UNIT
REEL PCB
MAIN UNIT
PICKUP UNIT(SERVICE)
MOTOR PCB(B) MOTOR PCB(A)
CD CORE UNIT(SERVO UNIT)
PCB UNIT(D)
PCB UNIT(A)
PCB UNIT(C)
PCB UNIT(E) PCB UNIT(B)
LOAD MOTOR PCB
CD CORE UNIT(STS UNIT)
HOLOGRAM
UNIT
FOCUS ACT
TRACKING ACT
MD
LD+
LD-
LD
MD
FO+
TO+
16
17
V5
Q101
Q102
PD
LD
CN101
IC 101
UPC2572GS
RF AMP
IC 201
UPD63702AGF
DIGITAL SERVO
PROCESSOR
DIGITAL SIGNAL
PROCESSOR
µ-COMPUTER
INTERFACE
35 69 EFM
CD 4CH DRIVER
IC 301
BA5986FM
14
11
16
15
22
BVD
V5 MUTE
9
MD/SD/TD/FD
74 10 11
VR2
XTAL XTAL
X201
5V
VD
CONT
CN201 CN801
5V
VD
CN301
WDCK
RFCK
RAOV
LRCK
SCKO
DOUT
MCK
IC 501
CXD2511R
SHOCKPROOF
CONTROLLER
BCK
DATA
LRCK
XTLI 39 512
IC 601
AK4321VF
8fs DF D/A LPF CN701
6
18
DEMO
PD
IC 502
MSM514400DP-60TS
4M DRAM
VD VD
LCH
WDSL/CHMO/CHMI XWRE/XRDE/XQOK
XWIH/XEMP/ADRMON/CHDT
V+5V IC 701
BA05SFP
5V REGULATOR
VM
VD
POWER
CONT
EMPH
4
2
1
XAO/XSTB/XSO/XSI/XSCK/XRST/SCONT
ELVSNS
LOADSW
DOORSW
MODESW
S801
S802
S803
MOTOR DRIVER
IC 802
LB1836M
2
6
3
5
ELVSNS
MOTOR DRIVER
LB1836M
IC 801
2
6
13
9
5
3
12
10
CG1
CG2
CG-
CG+
EL-
EL+ ELV1
ELV2
LO1
LO2
MAXSW
PH2
PH1
PVD
LO-
LO+
PVD PVD
Q801
VD
Q802 LOAD
ELHOME
CLAMP
CLAMP
ELHOME
CN802
M
BCL
SPINDLE
MOTOR
CARRIAGE
MOTOR
HOME
SWITCH
EC
VM
VCC
ST/SR
GND
HOME
M
LOADING
MOTOR
M
CAMGEAR
MOTOR
M
ELEVATION
MOTOR
Q851 Q852
D891 D892
PH1
PVD
Q881
D883 PH2
S883
MAX DETECT
SWITCH
PH1
PVD
PH1
PH2
MAXSW
LD MOTOR-
LD MOTOR+
MAXSW
PH2
PH1
PVD
ELV HOME
S886
S887
CLAMP
ELEVATION
SENSE
V+5V
5
14
15
4
3
1
2
3
4
8
5
6
7
10
11
11
1
1
2
3
4
1
2
4
1
2
1
1
2
3
5
6
3
4
2
1
5
6
3
4
2
1
5
7
3
4
2
1
7
5
9
8
10
11
10 2
11 1
19
28
29
30
19
28
29
30
45
44
46
42
8
9
35
39
10
1
50
49
48
6
7
11
4
5
2
3
47
46
45
12
44
43
36
35
37
32
33
39
41
41
43
48
50
LOAD
E
F
G
I
19 19
28 28
29 29
30 30
O
P
N
H
I
J
L
K
M
D F
EGA

17
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
5678
5678
A
B
C
D
CN802
L+ L-
MUTE
ILL+
ACC
ILL-
TX+ TX-
TXS+ TXS-
+B
BU
CN801
ACC
MUTE
CN803
TXM-
TXM+
+B
FUSE
5A
IC701
PD5575B
SYSTEM CONTROLLER
IC601
PD5556B
60
59
58
57
78
77
76
ELV1
ELV2
LO1
LO2
PH2
PH1
PH3
LOAD
modesw
55
6 5
CG1
CG2
62
61
POWER
26
27
53
Q702
Q301
CD MUTE
56
X701
6.290MHz
X601
10.00MHz
28 29
EMPH
CONT
cdmute
50
TAPEMUTE
MUTE
47
51
sysmute
45
swvdd
XIN
XOUT
15 13
XIN
XOUT
2
17 18
DCLOSE
40
79
loadsw doorsw
clamp
elhome
elvsns
Q307
TAPE MUTE SYS MUTE
Q603
Q602 Q309
IC301
NJM2068MD
MIXING
HARD MUTE
SW5V
AVC-LAN BUS DRIVER
RESET
21 IC302
NJM2068MD
21
IC602
HA12187FP
IC603
S-80730ANDT
16
12
IC303
NJM2068MD
21
IC305
TC74HC4066AF
ANALOG SW
43
12
Q303
Q833 Q831
Q305
Q601
EJ EJ
BU
SW5V
BU
MUTE
Q801
ISENS
Q805
BSENS
Q806
ASENS
Q807
ILL-
Q825
ilsens 23
bsens 20
asens 19
25
8
ILL- 94
TX 30
RX1 29
RX2 21
IPPW 22
reset 12
mode 54
ENC1+ 55
ENC1- 56
power 88
ENC2+ 87
ENC2- 86
illpow 52
CDILL
dssill
49
53
cdej
18
dload
73
ILL
4
csej 75
VDD
S924
DCLOSE S923 LOAD
S922
CD EJECT
CN903
CN905
CN902
CN804
71
8910
410
321
21
20
KEY
MATRIX
VR901
TUNE S901
TAPE
EJECT
25
16
MODE MODE
5
36
ENC1P ENC1P
3
38
ENC1M ENC1M
1
40
ENC2P
28
13
PWR PWR
29
12
ENC2M
31
10
VILM2 ILL2
34
7
VCILL CILL
24
17
VILL1 ILL1
33
8
CDEJ CDEJ
22
19
DLOAD DLOAD
18
23
DCLOSE DCLOSE
Q824 Q830
Q829
Q828 Q827
Q826
Q823
Q822
ILL8V
BU
BU
16
ULATOR
EREF
75
BU
L-
L+
UNBAL →BAL
VR902
POWER-VOL
ENC2P
ENC2M
CD CONTROLLER
C
RESET
25
VDCONT 13 VDCONT
RESET
SW UNIT KEYBOARD UNIT
NIT
B

18
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
A
1234
B
C
D
1234
AMAIN UNIT
KEYBOARD UNIT
C
GCD CORE UNIT(STS UNIT)
NCN251
MODE
MIXING AMP
CD MUTE
TAPE MUTE
ILL2 SELECTOR
CD ILL SELECTOR
CD CONTROLLER
CD 0dB 1kHz : +2.1dBs
TAPE 250nwb/m 315Hz : -7.2dBs TAPE
CD : -4.8dBs : +2.2dBs
A
A-aA-a A-bA-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
A-a
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)(FX-MG8506ZT/EW)
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL
PARTS LIST”.

FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
5678
A
B
C
D
5678
19
Decimal points for resistor
and capacitor fixed values
are expressed as :
2.2 2R2
0.022 R022
←
←
The >mark found on some component parts indicates
the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of
identical designation.
Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.
NOTE :
Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.
>
ENC2P
ENC2M
UNBALANCE TO BALANCE CONVERTER
ANALOG SWITCH
HARD MUTE
BUS DRIVER
VDD 5V REGULATOR
LPF
AUDIO 8.5V REGULATOR
CD 9V REGULATOR
ILLUMINATION 8V REGULATOR
ILL1 SELECTOR
SYSTEM CONTROLLER
TAPE : +1.2dBs
RESET
A
A-b

20
FX-MG8506ZT,MG8506ZT-91,MG8606ZT,MG8606ZT-91
AMAIN UNIT
NIT(STS UNIT)
NCN251
MODE
MIXING AMP
CD MUTE
TAPE MUTE
CD 0dB 1kHz : +2.1dBs
TAPE 250nwb/m 315Hz : -7.2dBs TAPE
CD : -4.8dBs
: +2.2dBs
A
1234
B
C
D
1234
A-a A-b
A-a
1
2
3
4
5