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 2001
K-ZZY. AUG. 2001 Printed in Japan
ORDER NO.
CRT2743
UNIVERSAL XM SATELLITE DIGITAL TUNER SYSTEM
GEX-FM903XM
UC
CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................3
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .....6
4. PCB CONNECTION DIAGRAM ................................26
5. ELECTRICAL PARTS LIST ........................................36
6. ADJUSTMENT..........................................................44
7. GENERAL INFORMATION .......................................56
7.1 DIAGNOSIS ........................................................56
7.1.1 DISASSEMBLY .........................................56
7.1.2 CONNECTOR FUNCTION DESCRIPTION........57
7.2 PARTS .................................................................58
7.2.1 IC................................................................58
7.2.2 DISPLAY ....................................................67
7.3 OPERATIONAL FLOW CHART ...........................68
8. OPERATIONS AND SPECIFICATIONS.....................69
Service
Manual
2
GEX-FM903XM
1. SAFETY INFORMATION
CAUTION
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.
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of
California to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65
28
3
1
14
15
18
20
19
12
11
17
2
26
27
13
16
23
10
4
4
25
8
9
7
6
5
24
29
22
21
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
3
GEX-FM903XM
1-1 Polyethylene Bag
CEG1116
*
1-2 Card
ARY1048
1-3 Owner's Manual
CRB1736
1-4 Installation Manual
CRB1737
*
1-5 Caution Card
CRP1264
2 Cord
CDE6586
3 Cord
CDE6677
4 Angle
CNB2351
5 Holder
CNC9750
6 Screw
BMZ30P060FZK
7 Screw
BNC40P120FZK
*
8 Polyethylene Bag
CEG1158
9 Screw
HMF40P060FZK
*
10 Polyethylene Bag
CEG1101
11 Panel
CNS6386
12 Bracket
CNC9289
13 Handle
CNM7644
14 Fastener(Soft)
CNM3872
15 Fastener(Rough)
CNM4041
16 Clamper
CNV1343
17 Screw Assy
CEA1965
*
18 Polyethylene Bag
CEG-127
19 Screw
IMS30P050FZK
*
20 Polyethylene Bag
CEG-158
21 Carton
CHG4468
22 Sub Carton
CHG4469
23 Contain Box
CHL4468
24 Protector
CHP2443
25 Inner Box
CHW1920
26 Cover
CEG1062
27 Air Cushioned Bag
CEG1055
28 Antenna Select Assy
CWM7850
29 Polyethylene Bag
CEG1173
Mark No. Description
Part No.
Mark No. Description
Part No.
- PACKING SECTION PARTS LIST
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.
Part No.
Language
CRB1736
English
- Owner's Manual
Part No.
Language
CRB1737
English
- Installation Manual
4
GEX-FM903XM
48
58
49
46
47
50
52
54
53
56
57
55
51
44
44
3
1
1
1
1
1
59
63
64
67
65
66
61
62
68
69
70
25
24
23
17
20
19
22
18
21
26
27
16
28
40
3635
29
31
39
38
34
33
41
37
42
4
6
12
11
9
10
7
14
8
13
15
43
43
5
2
45
49
32
30
60
71
A
B
C
D
E
2.2 EXTERIOR
5
GEX-FM903XM
1 Screw
BSZ30P060FZK
2 Chassis
CNA2387
3 Case
CNB2660
4 Holder
CNC9329
5 Insulator
CNM7196
6 Main Unit
CWM7659
7 Jack(CN501)
CKN1022
8 Plug(CN801)
CKS-460
9 Connector(CN802)
CKS3195
10 Connector(CN401)
CKS3410
11 Connector(CN402)
CKS3413
12 Connector(CN502)
CKS4563
13 Connector(CN503)
CKS4563
14 Holder
CNC9328
15 Holder
CNC9513
16 RF Module
CWE1615
17 Terminal(CN4)
CKF1066
18 Terminal(CN5)
CKF1066
19 Terminal(CN6)
CKF1066
20 Terminal(CN7)
CKF1066
21 Terminal(CN8)
CKF1066
22 Connector(CN3)
CKS4564
23 Connector(CN1)
CKX1062
24 Connector(CN2)
CKX1063
25 Case
CNC9335
26 Holder
CNC9336
27 Insulator
CNM7217
28 DSP Module
CWX2555
29 Terminal(CN202)
CKF1066
30 Terminal(CN203)
CKF1066
31 Terminal(CN204)
CKF1066
32 Terminal(CN205)
CKF1066
33 Terminal(CN207)
CKF1066
34 Terminal(CN208)
CKF1066
35 Terminal(CN209)
CKF1066
36 Terminal(CN210)
CKF1066
37 Terminal(CN212)
CKF1066
38 Terminal(CN213)
CKF1066
39 Connector(CN201)
CKS4564
40 Holder
CNC9332
41 Holder
CNC9333
42 Insulator
CNM7216
43 Screw
ISS26P055FUC
44 Screw
BPZ20P100FZK
45 Button
CAC6879
46 Button
CAC6881
47 Button
CAC7255
48 Button
CAC7256
49 Button
CAC7257
50 Cord
CDE5834
51 Cover
CNS6382
52 Display Unit
CWM7661
53 LCD(LCD901)
CAW1666
54 Holder
CNC9140
55 Sheet
CNM7069
56 Rubber
CNV5599
57 Lighting Conductor
CNV6569
58 Grille Unit
CXB7755
59 Antenna Select Assy
CWM7850
60 Cord
CDE5482
61 Antenna Cable
CDH1207
62 Chassis
CNA1555
63 Case
CNB1764
64 Antenna Select Unit
CWX2610
65 Plug(CN502)
CKS1222
66 Plug(CN501)
CKS2812
67 Antenna Jack(CN503)
CKX1056
68 Cord
CDE6677
69 Resistor
RS1/2PMF102J
70 Cap
CNS1472
*
71 Cushion
CNM6997
- EXTERIOR SECTION PARTS LIST
Mark No. Description
Part No.
Mark No. Description
Part No.