Pioneer KEX-M9527ZT/UC User manual

LX470
AUDIO SYSTEM
HEAD UNIT
VEHICLE DESTINATION PRODUCED
AFTER TOYOTA PARTS No. ID No. PIONEER MODEL No.
LEXUS LX470 U.S.A.,CANADA August 2002 86120-60650 P1739 KEX-M9527ZT/UC
KEX-M9527ZT-91/UC
LEXUS LX470 U.S.A.,CANADA August 2002 86120-60620 P1733 KEX-M9727ZT/UC
KEX-M9727ZT-91/UC
LEXUS LX470 AUSTRALIA August 2002 86120-60640 P2728 KEX-M9627ZT/ES
KEX-M9627ZT-91/ES
Manufactured for TOYOTA
by PIONEER CORPORATION
PUB.NO.
CRT2900
ORDER NO.
CRT2900

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--
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Dolby noise reduction manufactured under license from Dolby Laboratories Licensing
Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corpo-
ration.
This service manual does not describe the CD test mode.
For the operations in the CD test mode, refer to the CD player's Service Manual.
This service manual should be used together with the following manual(s):
- Supplementary model is identical to the original except for the addition of following
items
*:Non Spare part
1
Model No. Order No. Mech.Module Remarks
CX-1011 CRT2406 3L Cassette Mech. module: Mech.Description, Disassembly
Description KEX-M9527ZT-91/UC KEX-M9727ZT-91/UC KEX-M9627ZT-91/ES
Part No. Part No. Part No.
Polyethylene Bag CEG1174 CEG1174 CEG1026
Cover CEG1045( × 2) CEG1045( × 2) CEG1045( × 2)
Carton CHG4857 CHG4857 CHG4857
Contain Box CHL4857( × 1/4) CHL4857( × 1/4) CHL4857( × 1/4)
*Air cap CHW1947 CHW1947 CHW1947
For details, refer to "Important symbols for good services".
KEX-M9727ZT/UC (P1733)
KEX-M9527ZT/UC (P1739)
KEX-M9627ZT/ES (P2728)

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SAFETY INFORMATION
1.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. EXPLODED VIEWS AND PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.1 EXTERIOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 CASSETTE MECHANISM MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 KEYBOARD UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4 CASSETTE MECHANISM MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4. PCB CONNECTION DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 MAIN UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 KEYBOARD UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.3 CASSETTE MECHANISM MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5. ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6. ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.1 TUNER/AUDIO ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.2 SELF-DIAGNOSIS FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.1 DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.1.1 DISASSMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.1.2 CONNECTOR FUNCTION DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.1.3 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.2 IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3 EXPLANATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.3.1 SYSTEM BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.3.2 OPERATIONAL FLOW CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.4 CLEANING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8. OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.1 KEX-M9527ZT/UC,KEX-M9727ZT/UC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2 KEX-M9627ZT/ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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1. SPECIFICATIONS
General
Power source . . . . . . . . . . . . .13.2V(10.5V—16.0Vallowable)
Backup current. . . . . . . . . . . . . . . . . . . . .lessthan0.3mA
Grounding system . . . . . . . . . . . . . . . . . . . . Negative type
Dimensions . . . . . . . . . . . . . . . .260(W) × 70.5(H) × 165(D)mm
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.16 kg
Tape player
Tape . . . . . . . . . . . . . . . Compact cassette tape (C-30 - C-90)
Tape speed . . . . . . . . 4.76 cm/sec.(+0.14 cm/sec.,-0.05 cm/sec.)
Wow & flutter. . . . . . . . . . . . . . . . . .less than 0.2 %(WRMS)
Fast forward/rewind time. . . . . . . . . . less than 120 sec. for C-60
Stereo separation . . . . . . . . . . . . . . . . . . .more than 30 dB
Signal-to-noise ratio . . . . . . . . . . . . . . . . . .more than 40 dB
FM tuner
Frequency range(UC) . . . . . . . . . . . . . 87.75,87.9 - 107.9 MHz
Frequency range(ES) . . . . . . . . . . . . . . . . .87.5- 108.0 MHz
Usable sensitivity . . . . . less than14 dBµV (S/N: 30 dB)
Signal-to-noise ratio . . . . . . . . . . more than 46 dB(54dBµ input)
Distortion . . . . . . . . . . . . . . . . . . . . . . . .less than 1.5%
Degital noise. . . . . . . . . . . . less than 25 mVp-p (74 dBµ input)
AM tuner
Frequency range(UC) . . . . . . . . . . . . . . . . . 530 - 1,710 kHz
Frequency range(ES) . . . . . . . . . . . . . . . . . 531 - 1,602 kHz
Usable sensitivity . . . . . . . . . 34 dBµV(S / N : 20 dB)
Selectivity . . . . . . . . . . . . . . . . . . more than 20 dB (±9 kHz)
Signal-to-noise ratio . . . . . . . . . . more than 42 dB (74 dBµ input)
Distortion . . . . . . . . . . . . . . . . . . . . . . . .less than 1.5%

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2. EXPLODED VIEWS AND PARTS LIST
2.1 EXTERIOR
NOTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List.
• Screw adjacent to mark on the product are used for disassembly.
• For the applying amount of lobricants or glue, follow the instructions in this manual.
(In the case of no amount instructions,apply as you think it appropriate.)
"

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(1) EXTERIOR SECTION PARTS LIST
(2) CONTRASTTABLE
KEX-M9527ZT/UC, KEX-M9727ZT/UC and KEX-M9627ZT/ES are constructed the same except for the following:
Mark No. Description Part No.
1 Screw BMZ30P050FMC
2 Screw BSZ26P060FMC
3 Upper Case CNB2757
4 Front Frame CNC9736
5 Earth See Contrast table(2)
* 6 Cushion See Contrast table(2)
7 Insulator CNM7528
8 Main Unit See Contrast table(2)
9 Screw BMZ30P060FMC
10 Screw(M3x6) CBA1393
11 Connector(CN801) CKM1322
12 Connector(CN473) CKM1350
13 Connector(CN472) CKM1351
14 Plug(CN804) CKS3539
15 Connector(CN353) CKS3568
16 Antenna Jack(CN501) CKX1024
17 Rear Frame CNC9685
18 Holder CNC9686
19 FM/AM Tuner Unit See Contrast table(2)
20 Holder CNC8855
21 Terminal(CN802,803) VNF1084
* 22 Tape CNM8041
23 Chassis Unit CXB7972
24 Screw BPZ20P080FMC
25 Button See Contrast table(2)
26 Button See Contrast table(2)
27 Button See Contrast table(2)
28 Button See Contrast table(2)
29 Cushion CNM8057
30 Rubber CNV6977
31 Lighting Conductor CNV6979
32 Lighting Conductor CNV6981
33 Lighting Conductor CNV6983
34 Holder CNV6985
35 Holder CNV6987
36 Keyboard Unit See Contrast table(2)
37 Socket(CN901) CKS3552
38 Knob Unit CXB8269
39 Grille Unit See Contrast table(2)
40 Door See Contrast table(2)
41 Spring CBH1371
42 Button Unit CXB9538
43 Button CAC7770
44 Holder CNV7404
45 Cassette Mechanism Module EXK4290
46 Screw ISS26P055FUC
47 Transistor(Q811) 2SB1185
Mark No. Description Part No.
Mark NO Symbol and Description KEX-M9527ZT/UC KEX-M9727ZT/UC KEX-M9627ZT/ES
5 Earth CND1020 CND1020 Not used
* 6 Cushion CNM5281 CNM5281 Not used
8 Main Unit CWM8099 CWM8542 CWM8104
19 FM/AM Tuner Unit CWE1630 CWE1630 CWE1631
25 Button CAC7337(EJECT) CAC7337(EJECT) CAC7339(PROG)
26 Button CAC7338(TRAF) CAC7338(TRAF) CAC7337(EJECT)
27 Button CAC7343(SEEK,TRACK) CAC7343(SEEK,TRACK) CAC7344(CH,DISC)
28 Button CAC7345(CH,PROG,DISC) CAC7345(CH,PROG,DISC) CAC7346(SEEK,TRACK)
36 Keyboard Unit CWS1348 CWS1348 CWS1354
39 Grille Unit CXB9317 CXB8265 CXB8266
40 Door CAT2391 CAT2329 CAT2392

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2.2 CASSETTE MECHANISM MODULE
C
D
For grease application, refer to the service manual for CX-1011 (CRT2406).

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CASSETTE MECHANISM MODULE SECTION PARTS LIST
Mark No. Description Part No.
1 Screw BSZ20P040FMC
2 Washer CBF1037
3 Washer CBG1003
4 Screw EBA1028
5 Screw CBA1037
6 Spring EBH1653
7 Spring EBH1642
8 Spring EBH1641
9 Spring EBH1626
10 Spring EBH1627
11 Spring EBH1648
12 Cord EDD1024
13 Photo-reflector(Q101) EGN1004
14 Arm ENC1526
15 Lever EXA1610
16 Lever ENC1543
17 Arm ENC1532
18 Frame ENC1533
19 Holder ENC1547
20 Gear ENC1535
21 Arm ENC1550
22 Roller ENR1040
23 Belt ENT1027
24 Collar ENV1508
25 Arm ENV1539
26 Arm ENV1540
27 Gear ENV1569
28 Gear ENV1547
29 Gear ENR1044
30 Worm Wheel ENV1559
31 Lever ENV1551
32 Flywheel ENV1554
33 Gathering PCB ENX1073
34 Switch(S101,S102,S103) ESG1007
35 Deck Unit EWM1031
36 Plug(CN251) CKS3540
37 Gathering PCB ENX1066
38 Motor Unit(M1) EXA1618
39 Motor EXM1035
40 Head Assy(HD1) EXA1594
41 Arm ENC1537
42 Screw JGZ20P025FNI
43 Bracket ENC1559
44 Chassis Unit EXA1636
45 Pinch Holder Unit EXA1608
46 Pinch Roller ENV1518
47 Pinch Holder Unit EXA1607
48 Pinch Roller ENV1518
49 Reel Unit EXA1625
50 Head Base Unit EXA1611
51 Lever Unit EXA1587
52 Gear Unit EXA1596
53 Motor Unit(M2) EXA1623
54 Washer HBF-179
55 Spring EBH1537
56 Worm Gear ENV1564
57 Spring EBH1655
58 Lever ENC1548
59 Washer YE15FUC
60 Tube ENM1039
61 Spring EBH1645
62 Spring EBH1545
63 Sensor Unit EWM1041
Mark No. Description Part No.

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3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
CN501
ANT
IC561
HA12181FP
16 3
9
S-80735ANDZI
IC602
2
1
RESET
VDD
Q811 Q813
Q816
ILLB
FML
CN804
5,613,14
13 15
12
RESET
XIN
4
LAMP
XOUT
SYSTEM CONTROLLER
IC601
A
KDT,kst
AMAIN UNIT
FM/AM TUNER UNIT
KEYBOARD UNIT
B
51
LOCH
53
PCE2
33
pck
52
PCE1
93
SL
56
FMSD
57
st
31,32
PDO,PDI
IC 3
EEPROM
28
27
FM/AM 1ST IF 10.7MHz
T51 Q51 CF51 CF52 CF53
IC1
MIXER, IF AMP, DET.
6
21
COMP
22
25 10 14 12 15 16 8 13 2 4
CF202
VDD
VCC
DI/DO CE2 CK CE1 SDBW SL FMSD NL2
IC 2 FM MPX
AMANT
FMANT
ATT
ATT
AMRF
FMRF
IMG ADJ
RF ADJ
X901
10.25MHz
ANT ADJ
LOCL
AMDET
MPXREF 41kHz
AM 2ND IF
450kHz
1
STIND
L ch
9
AMDET
17
AMPNS
26 RFGND
CN901
KEY MATRIX
ILLUMINATION
BU
2
Q502
AUD+B
SW5V
Q5
6
Q405
Q5
6
44
AMPW
Q252
55
NL2
Q406
IC401
NJM2068M
D
RBDS
DECODER
TUNER MIXING
A
AM PNS
FML
AML
Q561
AMB
F
M
AMB
IC501
LA1061M 1
13
5
6
Q501
NIN
MFIX
SUB
MAIN
SUB
MAIN
UC/ML
KEH-M9527ZT/UC
KEH-M9727ZT/UC
KEH-M9627ZT/ES
UC
ES
UC/ML
UC
UC/ML
UC
ES
CN251
CN252
CN253
CN255
CN256
CN254
IC251
HA12216F
TAPE EQUALIZER
MECHANISM DRIVER
IC351
PA2020A
Q271
BU
M
SUB
MOTOR
M
MAIN
MOTOR
7
+B
TAPE-L
MTL
MTL
VR302
VREF
6
16
11
12
28
37
39
17
5
2
NR
1
STBY
LOAD
LOAD
SWITCH
MODE
SENSE
1
4
5
2
1
4
3
20
64
1
64
1
CDECK UNIT
DSENSOR UNIT
SWITCH
70µs
19
CREQ
59
currq
54
SDBW
BU
CN353
4
3
20
AUD+B
CSL
MS,DIR,PLAY,MTL,
NR,CSLOAD,POS,ES,
SC2,SC1,CM,STBY
3
NL1
91
NL1
18
LDET
IC252
PM4009A
820
19
ldet
RCK,RDT,rdslk,57K,drst
FWD
LcH
REV
LcH