Pioneer DEH-MG8137ZT User manual

PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS (USA) INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER CORPORATION 2003 K-ZZD. APR. 2003 Printed in Japan
ORDER NO.
CRT3063
SCION AUDIO SYSTEM 6-DISC CD CHANGER
DEH-MG8137ZTUC
Service
Manual
TOYOTA
DEH-MG8137ZT/UC
VEHICLE DESTINATION PRODUCED AFTER TOYOTA PART No. ID No. PIONEER MODEL No.
xA, xB U.S.A. April 2003 86120-0W090 T1802 DEH-MG8137ZT/UC
-This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-951 CRT2872 G2 CD Mech. Module:Circuit Description, Mech.Description, Disassembly
For details, refer to "Important symbols for good services".

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SAFETY INFORMATION
-CD section precaution
1. Before disassembling the unit, be sure to turn off the
power. Unplugging and plugging the connectors dur-
ing power-on mode may damage the ICs inside the
unit.
2. To protect the pickup unit from electrostatic dis-
charge during servicing, take an appropriate treat-
ment (shorting-solder) by referring to “the DISAS-
SEMBLY” on page 66.
3. After replacing the pickup unit, be sure to check the
grating. (See p.56.)
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.
[ Important symbols for good services ]
In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.
When you find the procedures bearing any of the symbols, be sure to fulfill them:
2. Adjustments
To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable.
In accordance with the procedures or instructions described in this manual, adjustments should be performed.
3. Cleaning
For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,
proper cleaning should be performed to restore their performances.
5. Lubricants, glues, and replacement parts
Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying
glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the
prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed
ones should be used.
4. Shipping mode and shipping screws
To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or
the shipping screws should be installed before shipping out in accordance with this manual, if necessary.
1. Product safety
You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and
should keep the safety during servicing by following the safety instructions described in this manual.

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CONTENTS
SAFETY INFORMATION......................................................................................................................................................2
1. SPECIFICATIONS .................................................................................................................................................................4
2. EXPLODED VIEWS AND PARTS LIST ................................................................................................................................5
2.1 PACKING..........................................................................................................................................................................5
2.2 EXTERIOR........................................................................................................................................................................6
2.3 CD MECHANISM UNIT(1)...............................................................................................................................................8
2.4 CD MECHANISM UNIT(2).............................................................................................................................................10
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.............................................................................................................13
3.1 BLOCK DIAGRAM(1).....................................................................................................................................................13
3.2 BLOCK DIAGRAM(2).....................................................................................................................................................14
3.3 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) ...................................................................................................16
3.4 KEYBOARD UNIT ..........................................................................................................................................................22
3.5 CD MECHANISM MODULE(GUIDE PAGE)..................................................................................................................24
4. PCB CONNECTION DIAGRAM..........................................................................................................................................32
4.1 MAIN UNIT ....................................................................................................................................................................32
4.2 KEYBOARD UNIT ..........................................................................................................................................................36
4.3 CD MECHANISM MODULE..........................................................................................................................................38
5. ELECTRICAL PARTS LIST..................................................................................................................................................44
6. ADJUSTMENT...................................................................................................................................................................52
6.1 CONNECTION DIAGRAM .............................................................................................................................................52
6.2 TEST MODE...................................................................................................................................................................53
6.3 CD ADJUSTMENT ........................................................................................................................................................54
6.4 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT...........................................................................56
6.5 TEST MODE(CD) ...........................................................................................................................................................58
6.6 AVC-LAN DIAGNOSIS MODE.......................................................................................................................................62
7. GENERAL INFORMATION.................................................................................................................................................66
7.1 DIAGNOSIS ...................................................................................................................................................................66
7.1.1 DISASSEMBLY .......................................................................................................................................................66
7.1.2 CONNECTOR FUNCTION DESCRIPTION .............................................................................................................71
7.2 PARTS ............................................................................................................................................................................72
7.2.1 IC .............................................................................................................................................................................72
7.2.2 DISPLAY..................................................................................................................................................................83
7.3 EXPLANATION ..............................................................................................................................................................84
7.3.1 SYSTEM BLOCK DIAGRAM ..................................................................................................................................84
7.3.2 OPERATIONAL FLOW CHART...............................................................................................................................85
7.4 NOTES ON SERVICING ................................................................................................................................................86
7.4.1 CLEANING ..............................................................................................................................................................86
7.4.2 FACTORY SETTINGS .............................................................................................................................................86
8. OPERATIONS .....................................................................................................................................................................87

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1. SPECIFICATIONS
General
Power source . . . . . . . . . . . . 13.2 V DC
(10.5 –16.0 V allowable)
Grounding system . . . . . Negative type
Max. current consumption . . . . . . 15 A
Backup current . . . . . . . 0.3 mA or less
Dimensions ( W ×H ×D )
. . . . . . . . . . . . . . . . 200 ×100 ×175 mm
Weight . . . . . . . . . . . . . . . . . . . . . 2.2 kg
LCD back light . . . . . . . 10 color change
Audio
Tone controls
(Bass) . . . . . . . . . . . Frequency : 55 Hz
Level : +11 dB -13 dB
(Treble) . . . . . . . Frequency : 14080 Hz
Level : +8 dB -10 dB
Maximum power output . . . . 40 W ×4
Load impedance . . . . . . . . . . . . . . . 4 W
CD player
System . . . Compact disc audio system
Usable discs . . . . . . . . . . Compact disc
Signal format
Sampling frequency . . . . . . . 44.1 kHz
Number of quantization bits
. . . . . . . . . . . . . . . . . . . . . . . . 16; linear
Number of channels . . . . . . . 2 (stereo)
MP3 decoding format
. . . . . . . . . . MPEG1 & 2 Audio Layer 3
AM tuner
Frequency range . . . . . . 530 –1710 kHz
FM tuner
Frequency range . . . 87.75 –107.9 MHz

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2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
1•••••
2 Screw Assy CEA3954
* 3 Polyethylene Bag CEG-127
4 Screw HMF50P080FTC
* 5 Polyethylene Bag CEG1116
* 6 Polyethylene Bag CEG1316
7 Carton CHG5059
8 Contain Box CHL5059
9 Protector CHP2697
10 Protector CHP2698
11 Owner's Manual CRB1827
(English)
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.
-For the applying amount of lubricants or glue, follow the instructions in this manual.
( In the case of no amount instructions, apply as you think it appropriate.)
-PACKING SECTION PARTS LIST

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2.2 EXTERIOR

1 Screw BSZ26P050FTC
2 Screw BSZ26P140FTC
3 Screw BSZ30P080FTC
4 Chassis Unit CXC1117
5 Insulator CNM8107
6 Heat Sink CNR1683
7 Label CRW1469
8 Label CRW1470
9 Main Unit CWM8739
10 Screw ASZ26P080FTC
11 Screw BMZ30P040FTC
12 Screw(M3x6) CBA1393
13 Terminal(CN474,476) CKF1064
14 Bracket Unit CXC1118
15 Connector(CN471) CKM1222
16 Connector(CN473) CKM1350
17 Connector(CN472) CKM1351
18 Connector(CN601) CKS3835
19 Connector(CN479) CKS4670
20 Connector(CN501) CKX1064
21 Holder CNC9591
22 Holder CNC9592
* 23 Shield CNC9595
24 Holder CND1460
25 FM/AM Tuner Unit CWE1630
26 Holder CNC8855
27 Chassis Unit CXC1012
28 Screw BPZ20P100FTC
29 Button(EJECT) CAC7884
30 Button(LOAD) CAC7886
31 Button(C) CAC7888
32 Button(SSP) CAC7889
33 Button(1,2) CAC7890
34 Button(3,4) CAC7891
35 Button(5,6) CAC7892
36 Button(SCAN,TEXT) CAC7893
37 Button(A) CAC7894
38 Button(UP) CAC7895
39 Button(M) CAC8074
40 Button(DOWN) CAC8075
41 Shield CND1556
42 Cover CNM7433
43 Cushion CNM8306
44 Lighting Conductor CNV7542
45 Holder CNV7543
46 Holder CNV7544
47 Guide CNV7646
48 Keyboard Unit CWM8740
49 LCD CAW1824
50 Connector(CN901) CKS4671
51 Holder CND1423
52 Sheet CNM8490
53 Sheet CNM8491
54 Lighting Conductor CNV7541
55 Connector CNV7557
56 Button Unit(SOURCE) CXC1082
57 Grille Unit CXC1324
58 Screw BSZ26P050FTC
59 Screw CBA1624
60 Spring(Silver) CBH2481
61 Spring(Black) CBH2482
62 Connector CDE7173
63 Connector CDE7174
* 64 Case CNB2826
65 Bracket CND1426
66 Sheet CNM5981
67 Damper CNV6608
68 Control Unit(G2MP3T) CWX2787
69 Connector(CN902) CKS2425
70 Connector(CN602) CKS4374
71 Connector(CN101) CKS4512
*72
Mechanism Unit(G2TMP3) CXC1912
73 Screw ISS26P055FTC
74 IC(IC801) TDA7386
75 Transistor(Q431,441,850) 2SB1185
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Mark No. Description Part No. Mark No. Description Part No.
-EXTERIOR SECTION PARTS LIST

1
1
1
1
3
3
1
1
1
1
1
31
2
3
3
3
1
3
33
3
3
D
F
1:GEM1043
2:GEM1042
3:GEM1024
1
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2.3 CD MECHANISM UNIT(1)

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Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ20P020FZB
2 Screw BMZ20P025FTC
3 Screw(M2x2) CBA1556
4 Screw(M2x2.5) CBA1626
5 Screw(M2x2.5) CBA1609
6 Screw(M2x4.5) CBA1629
7 Spring CBH2460
8 Spring CBH2461
9 Spring CBH2484
10 Spring CBH2694
11 Spring CBH2486
12 Spring CBH2487
13 Spring CBH2500
14 Connector CDE6698
15 Collar CLA4329
16 Collar CLA4330
17 Collar CLA4331
18 Gear CND1649
19 Cam Gear CND1650
20 Frame CND1651
21 Steer CND1655
22 Arm CND1657
23 Bracket CND1658
24 Bracket CND1660
* 25 Lever CNC9953
26 Gear CNV6612
27 Holder CNV6648
28 Holder CNV6738
* 29 Chassis Unit CXC1642
* 30 Frame Unit CXC1643
* 31 Arm Unit CXC1647
32 Spring CBH2488
33 Holder Unit CXC1644
34 Holder Unit CXC1646
35 Tray Unit CXB6930
36 Lever Unit CXC1648
* 37 Lever Unit CXC1649
38 Lever Unit CXC1650
* 39 Lever Unit CXC1651
40 Cam Motor Assy CXB7522
41 Washer CBF1064
42 Gear CNV6610
43 Gear CNV6611
44 Motor Unit(-A)(M1) CXC1144
45 Screw JFZ20P020FTC
46 Washer YE20FTC
47 ELV Motor Assy CXB7523
48 Screw BMZ20P025FTC
49 Washer CBF1064
50 Holder CND1668
51 Gear CNV6634
52 Gear CNV6635
53 PCB Unit(LED) CWX2614
* 54 Connector(CN31) CKS4523
55 Motor Unit(-A)(M2) CXC1145
56 Screw JFZ20P020FTC
* 57 Arm Unit CXC1653
58 Bracket Unit CXC1654
* 59 Lever Unit CXC1658
* 60 Lever Unit CXC1659
* 61 Lever Unit CXC1661
62 Arm Assy CXB8822
63 Washer CBF1038
64 Spring CBH2489
65 Arm CNV6735
66 Bracket Unit CXC1652
67 Screw BMZ20P025FTC
68 Spring CBH2459
69 Volume(VR1) CCW1023
70 Bracket CND1652
71 Steer CND1656
72 Flexible PCB CNP6368
73 PCB Unit(SIDE) CWX2613
74 Connector(CN12) CKS3991
* 75 Connector(CN14) CKS4404
76 Connector(CN13) CKS4525
77 Connector(CN11) CKS4572
78 Lever Unit CXC1779
* 79 Lever Unit CXB9121
* 80 Lever Unit CXB9122
81 Screw JFZ20P020FTC
82 Washer CBF1037
-CD MECHANISM UNIT(1) SECTION PARTS LIST

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1
1
1
1
1
1:GEM1043
2:GEM1042
G
H
E
2.4 CD MECHANISM UNIT(2)

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Mark No. Description Part No. Mark No. Description Part No.
1Carriage Mech. Assy(G2BM) CXB8844
2 Screw(M2x2) CBA1556
3 Screw(M2x6) CBA1628
4 Washer CBF1038
5 Spring CBH2453
6 Spring CBH2480
7 Spring CBL1521
* 8 Guide CNC9402
9 Flexible PCB CNP6217
10 Holder CNV6624
11 Holder CNV6625
12 Rack CNV6642
13 Arm CNV6731
14 Lever CNV6736
15 Holder CNV6737
16 PCB Unit CWX2611
17 Connector(CN41) CKS3785
18 Connector(CN42) CKS4508
19 Connector(CN1) CKS4508
20 Support Wheel Unit CXC1768
21 Screw Unit(-B) CXB7518
22 Carriage Motor Assy CXB7521
23 Washer CBF1038
24 Belt CNT1088
25 Pulley CNV6627
26 Gear CNV6629
27 Motor Unit(-A)(M3) CXC1143
28 Screw JFZ14P020FTC
29 Loading Mech. Assy CXB7525
30 Washer CBF1037
* 31 Washer CBF1075
* 32 Spring CBH2450
33 Spring CBH2452
* 34 Spring CBH2457
* 35 Spring CBH2580
* 36 Frame CND1653
* 37 Arm CND1654
* 38 Sheet CNM7295
39 Roller CNV6616
40 Collar CNV6617
* 41 Guide CNV6622
* 42 Holder CNV6636
* 43 Lever CNV6732
* 44 Lever CNV6733
45 Collar CNV6734
* 46 Holder CNV7144
47 Screw JFZ12P018FTC
48 Washer CBF1037
* 49 Motor Unit(-A) CXC1146
50 Shaft Unit(-C) CXB7528
51 Screw JFZ20P020FTC
52 PU Unit(Service)(PX1MP3) CXX1600
* 53 Gear CNV6620
* 54 Gear CNV6621
55 Switch(S1,2) CSN1057
* 56 Connector CDE6674
-CD MECHANISM UNIT(2) SECTION PARTS LIST

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3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM(1)
M
LOADING
VR1 ELV SENSE
VR11
S31 CAMLOAD
PU UNIT(SERVICE) (PX1MP3)
PCB UNIT(M2 UNIT)
HOLOGRAM
UNIT
FOCUS ACT
TRACKING ACT
MD LD+
LD-
LD
MD
FO+ TO+
CN41
M
M
SPINDLE
M3 CRG
CLAMP
10
2
1
16
14
A+C,B+D, E,F
2A3
3 5A2
A1 IC 1
BA6849FS
MOTOR DRIVER CN1
EC 19
S2 CLAMP
HOME
S1 HOME
5
2 1
5
2 1
CN42
S41 LOAD3
PCB UNIT
23
14
13
28
26
6
9
10
1
11
12
23
14
13
28
26
6
9
10
1
11
12
PCB UNIT(SIDE)
CN12
S11 CAMCLMP
M
M1 CAMGEAR
CN31
M
M2 ELV
S32 CAMEOK
D31 D32
PCB UNIT (LED)
CN14
CN13
Q22 Q21
S21 LOAD1
S22 LOAD2
PCB UNIT (LOAD)
2 1
4 5
CN11
MD 23
32
33
LD+
LD-
FOP 18
TOP 20
SIN(EC) 40
CLAMP 36
HOME 37
LOADSW2 45
50
COP 34 COM 35
CGM 3
CGP 1
ELP 15
ELM 13
CAMEOK 11
CAMLOAD 10
LED 12
ELVSNS 46
EREF 48
LOADPHT 7
LOADSW1 8
LOP 6
LOM 5
23
32
33
18
20
40
36
37
45
50
34 35
3
1
15
13
11
10
12
46
48
7 8
6
5
CONTROL UNIT(G2MP3T)
Q101
140 PD
RF AMP, CD DECODER, MP3 DECODER, DIGITAL SERVO/ DATA PROCESSOR
141 LD
A+C,B+D,E,F
L-OUT 35
IC 201
UPD63760GJ
IC701
PE5371A
MECHANISM CONTROLLER
55 3VDD
BVDD
3+3ch
DRIVER
IC 301 BD7962FM
ELV1,ELV2,LO1,LO2, CG1,CG2
26
29 CONT
MUTE
MOTOR CONTROL
14 VD
SERVO EQUALIZER OUTPUT
FD,TD,SD,MD
18
15 OUT1+
OUT2-
Q602
Q603
CD MUTE
VD
Q601
30
CDMUTE
CN101 CN902
BSI,BSO,BSCK,BRXEN,BSRQ,BRST
31
reset
LOUT
24
VDCONT
9
19
14
RESET
VDCONT
VDD
VD VD 20
21
IC 203
BA033SFP
3.3V REGULATOR
4
2
V3R3A
S-812C33AUA-C2N
3V REGULATOR
32
IC 703
3VDD
76
TEMP
26 OPOUT
COP
COM
ELP
ELM
LOP
LOM
CGM
CGP
19
20
2
3
21 22
34
35
OUT3+
OUT3-
OUT5-
OUT5+
OUT4+ OUT4- OUT6+ OUT6-
VD
CLAMP
HOME
LOADSW2
CAMCLMP
ELVSNS
EREF
13
77
90
5
82
75
CLAMP
HOME
LOADSW2
CAMCLMP
EREF
CAMEOK 3CAMEOK
CAMLOAD 4CAMLOAD
LOADPHT 81 LOADPHT
LOADSW1 90 LOADSW1
ELVSENS
C
GF
H
D
E
IC204
MSM51V18165FP-60TS
DRAM
10
2
1
16
14
5
IC702
TC74VHCT08AFT
53
RFOK 12
20
wait 2
Q701
8
11
3
27 79
xwait
FOK
10
VDD
SWDVDD
14
17
adena
A
CN601
11
44
55
77 88

14
IC 781
HA12187FP
AVC-LAN DRIVER
42
SYSMUTE
XOUT
XIN
SYSTEM CONTROL
IC 701(2/2)
PD5860A
CN501
SWVDD
AUDIO+B
ANTENNA
JACK
1
2
BUS-
BUS+
BUS-L
BUS+L
1
2
8
6
5TX
RX
IPPW
CN601
13
X701
15
dsprst,dsperr,I
49
SYSPW
ILLPWM
28
CN473
IC 331
NJM4558MD
7
5
6
IC 561
HA12181FP 9
16
3
BLDA
3
cdej
74
AM NOISE CANCELER
AM
FM L
Q502
LOCL
PDIO
A
C
MAIN UNIT
FM/AM TUNER UNIT
Q561
1
8
3
2
17
VDD
BRST,BRXEN,BSRQ
BDATA,BSCK
TX1-
TX1+
CN472
BU
Q431
Q432
BU
Q850
Q
BU
ILLPWM
Q853
Q854
BU
BLDA
AMPNS
AMDET
Q524
LCE,LRST
DDST,DDDT,DD
POWER
63
LANMUT
ACC
TX-
TX+
46
LANMUTE
VD REGULATOR
C
CN902
7
13 RESET
VD
VDCONT
IC 3
EEPROM
28
27
FM/AM 1ST IF 10.7MHz
T51 Q51 CF51 CF52 CF53
IC1
MIXER, IF AMP, DET.
6
21
18
LDET
COMP
22
25 10 14 12 15 16 8 13 2 3 4
CF202
VDD
VCC
DI/DO CE2 CK CE1 SDBW SL FMSD NL1 NL2
IC 2 FM MPX
AMANT
FMANT
ATT
ATT
AMRF
FMRF
IMG ADJ
RF ADJ
X901
10.25MHz
ANT ADJ
LOCL
23 LOCH
AMDET
MPXREF 41kHz
AM 2ND IF
450kHz
19
CREQ
11
DGND
1
STIND
L ch
5
R ch
924
AMDET FMLOCL
20
177
AMPNS WC
26 RFGND
AMIN
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3.2 BLOCK DIAGRAM(2)

15
12
1
bsen
asen
VDD
BU
locl
20
19
SD
SL
PCE1
pck
PCE2
PDO
5
FL
14
RL
42
SMUTE
SWILL+B
SWVDD
3
5
19
17
FL-
FL+
RL-
RL+
ACC
27
25
97
LIN-1
81
LIN-3
83
LIN-2
82
LIN-4
23
2
22
1
30 29 47
FLIN
12
RLIN
15
22
4
SYSTEM CONTROL
RESET
POWER AMP
IC 701(1/2)
PD5860A
L
IC 351
PM2010A
S-80835CNNB-B8U
IC 801
TDA7386
reset
SWVDD
Q404
TX
RX
TX RX1 IPPW
DSP/
ELECTRONIC VOLUME/
SOURCE SELECTOR
SWVDD
STBYMUTE
1
5
3
CN479
2
Q402
prst,dsperr,IFOK,dspack,IFDI,IFDO,IFCLK,dspcs
FM L
LANL
CD L
Q801
49
SYSPW
+B
ACC
ACC
RL+
FL+
RL-
FL-
TX RX
PCE1
CN471
84
AM
isen 18
Q403
SYSPW
cdej 7
A SENSE
PDI
100
PDIO
Q351
AUDIO+B
DSP VDD (3.3V)REGULATOR
VDD
3,8,18,27,37,49,76,77,96
ILL
pck
ce@
89
DMI
Q561
6,20
VCC
BU
S-812C56AUA-C3K
IC 421
32
Q421
Q422
swvdd 73
VDD
BU
Q805
SYSPW
Q802
Q804
Q803
SYSPW
Q441
Q442
BU
SYSPW
AUDIO+B
Q850
Q852
PWM
BKLTB
9
Q410
ILL-
SWVDD
BU
Q451
Q452
SYSPW
AMP
Q806
SWVDD
TLMT
43
TELMUTE
IC 782
1/2VCC
BU
Q454
Q455
Q453
44
FMPW
45
AMPW
ANT
Q807
AUDIO+B
Q808
SVR
10
Q563
Q565
AUDIO+B
AMB
AMPW
45
LCE,LRST,LOFF,LCK,LDT
DDST,DDDT,DDCK,DDSTBY,DDRST
POW R 6
Q701
SWVDD
46
NMUTE
LANMUT
BU
B SENSE
I SENSE
ILL
ANT +B
WF AMP+B
ILL-
AUDIO+B
BU MUTE
MUTE
RESET
LPF
KEYILB
V5SWVD
IC 901
UPD16432B-001
LCD DRIVER/
KEY CONTROLLER
KEY MATRIX
1
5
KEY DATA
VDD
12
CN901
LCD
3BKLTB
ILLUMINATION
(RED) (GREEN) (BLUE)
Q909
Q906
IC 902
BU8770AFV
2DATA
1NSTBY
4CLK
ROUT 15
GOUT 14
BOUT 13
7cdej
EJECT
LCD BACKLIGHT
BKEYBOARD UNIT
IC 903
TC74LCX08FT 3
6
8
LCE,LRST,LOFF,LCK,LDT
DDST,DDDT,DDCK,
DDSTBY,DDRST 3STRB
11
Q905
9+3.6V
Q914
5NRST
DDRST
Q910
Q907
Q911
Q908
DCOUT
12
DCOUT DCOUT DCOUT
Q903Q901
cdgrn
2
(GREEN)
V5SWVD
Q904Q902
cdamb
(AMBER)
1
V5SWVD
Q912
Q913
V5SWVD
keyill
3
PWR
POWER
6
BKLTB2
+3V
+3.6V 9VDD
+3V 7VDD3V
5678
F
E
D
C
B
A
5678
DEH-MG8137ZT/UC

A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page
Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or
"ELECTRICAL PARTS LIST". A-a
A
BDATA
FM/AM TUNER UNIT
BCN901
CCN902
2
41
5
63
DIGITAL SOUND P
SOURCE SEL
ELECTRIC VO
SYSTEM CONTROLLER
AM PNS
ANTENNA JACK
2
41
5
3
CD:+0.1dBs
(1kHz,0dB)
AM:-12.7dBs
FM:-27dBs
(400Hz,30% mod)
AM:-13.2dBs
FM:-27dBs
AM:-28dBs
CD: 0dBs
AVC-LAN: 0dBs
FM: -
AM:-9
CD: +
AVC-LAN: +
16
1234
1234
F
E
D
C
B
A
DEH-MG8137ZT/UC
3.3 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

A-b
A-a A-b
A-a A-b
A-b
A-a
A
5.0V
AMAIN UNIT
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.
>
2
4
1
5
63
2
4
1
5
63
2
41
5
63
241
5
63
TAL SOUND PROCESSOR,
SOURCE SELECTOR,
ELECTRIC VOLUME
LLER
POWER AMP
AVC-LAN:+8.23dBs
(1kHz,0dB)
FM: -12dBs
AM:-9.2dBs
CD: +1dBs
AVC-LAN: +1dBs
FM: +14dBs
AM:+16.8dBs
CD: +27dBs
AVC-LAN: +27dBs
17
5678
F
E
D
C
B
A
5678
DEH-MG8137ZT/UC

A-a A-b A-a
A-a
A-b 1234
FM/AM TUNER UNIT
2
41
5
63
DIGITAL SOUND PROCESSOR,
SOURCE SELECTOR,
ELECTRIC VOLUME
AM PNS
ANTENNA JACK
2 41
5
3
AM:-12.7dBs
FM:-27dBs
(400Hz,30% mod)
AM:-13.2dBs
FM:-27dBs
AM:-28dBs
CD: 0dBs
AVC-LAN: 0dBs
FM: -12dBs
AM:-9.2dBs
CD: +1dBs
AVC-LAN: +1dBs
18
1234
1234
F
E
D
C
B
A
DEH-MG8137ZT/UC

A-a A-b A-a
A-a
A-b
567
BDATA
BCN901
CCN902
SYSTEM CONTROLLER
CD:+0.1dBs
(1kHz,0dB)
19
5678
F
E
D
C
B
A
5678
DEH-MG8137ZT/UC

A-a A-b
A-b 1234
AMAIN UNIT
>
CESSOR,
OR,
ME
POWER AMP
AVC-LAN:+8.23dBs
(1kHz,0dB)
FM: +14dBs
AM:+16.8dBs
CD: +27dBs
AVC-LAN: +27dBs
20
1234
1234
F
E
D
C
B
A
DEH-MG8137ZT/UC