Pioneer GEX-FM903XM/UC 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 2002 K-ZZY. FEB. 2002 Printed in Japan
ORDER NO.
CRT2831
Service
Manual
UNIVERSAL XM SATELLITE DIGITAL TUNER SYSTEM
GEX-FM903XM XN/UC
-This service manual should be used together with the manual(s) listed below.
For the parts numbers, adjustments, etc. which are not shown in this manual,
refer to the following manual(s).
Model No. Order No. Mech. Module Remarks
GEX-FM903XM/UC CRT2743
EXPLODED VIEWS AND PARTS LIST
PACKING(Page 2)
-PACKING SECTION PARTS LIST Part No.
Mark No. Description GEX-FM903XM/UC GEX-FM903XM/XN/UC
21 Carton CHG4468 CHG4631
22 Sub Carton CHG4469 (Carton)CHG4632
23 Contain Box CHL4468 CHL4631
24 Protector CHP2443 CHP2527
25 Inner Box CHW1920 Not used

GEX-FM903XM
ELECTRICAL PARTS LIST(Page 36)
RF Module Part No.
Symbol and Description GEX-FM903XM/UC GEX-FM903XM/XN/UC
Q2 Transistor 2SA1774 Not used
Q3 Transistor UMX2N Not used
L15 Inductor LCYB1N8S1005 LCYB1N2S1005
L20 Inductor LCYB3N9S1005 LCYB2N2S1005
L53 Inductor LCYB2N7S1005 LCYB82NJ1005
R3 RS1/16SS101J RS1/16SS431J
R4 RS1/16SS680J RS1/16SS120J
R5 RS1/16SS751J RS1/16SS122J
R6 RS1/16SS101J RS1/16SS431J
R7 RS1/16SS751J RS1/16SS122J
R9 RS1/16SS431J Not used
R10 RS1/16SS120J RS1/16SS0R0J
R11 RS1/16SS431J Not used
R13 RS1/16SS562J RS1/16SS0R0J
R14 RS1/16SS362J RS1/16SS9100F
R15 RS1/16SS362J RS1/16SS2400F
R30 RS1/16SS473J Not used
R32 RS1/16SS332J Not used
R33 RS1/16SS222J Not used
R36 RS1/16SS472J Not used
R39 RS1/16SS471J Not used
R41 RS1/16SS151J RS1/16SS221J
R57,58 RS1/16SS471J RS1/16SS121J
R71,72 RS1/16SS221J Not used
R73 RS1/16SS220J RS1/16SS0R0J
R74 RS1/16SS220J RS1/16SS180J
R75,76 RS1/16SS221J RS1/16SS301J
C9,10,15,16 CCSSCH101J50 CCSSCH220J50
C30 CSZS3R3M16 Not used
C37,85 CKSSYB103K16 Not used
C138 CCSSCJ3R0C50 CCSSCH120J50
DSP Module Part No.
Symbol and Description GEX-FM903XM/UC GEX-FM903XM/XN/UC
IC203 IC K4S640832E-TL1H K4S280832D-TL1H
IC205 IC K4S640832E-TL1H Not used
C283 CCSSCH101J50 Not used
C284,285,290,297,302 CKSSYB104K10 Not used
C307 CCSSCH101J50 Not used
C308 CKSSYB104K10 Not used
C313 CCSSCH101J50 Not used
C314 CKSSYB104K10 Not used
Main Unit Part No.
Symbol and Description GEX-FM903XM/UC GEX-FM903XM/XN/UC
IC601 IC PD5680C PD5777A

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
114
15
18
20
19
12
11
17
2
26
27
13
16
23
10
4
4
25
89
76
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
2019
22
18
2126
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.

IC 1
AT-119 IC 3
MAX2644EXT
33 IC 6
MAX2644EXT
63
IC 19
SW-475
15
IC 2
AT-119 IC 4
MAX2644EXT
33 IC 5
MAX2644EXT
63 125
4
4
IC 7
AD8314ARM
7
IC 14
S-81225SG-QH
3
3
RF AGC DETECTOR
KEYED AGC CIRCUIT
F2
7IC 9
MAX2682EUT
3 4
1
F15
5IC 17
AD61009ARS
14
6
F1 IC 8
MAX2682EUT
3 4 F16
5IC 18
AD61009ARS
14
6
F10 IC 12
RF2325
35
1st IF (TER)
1st IF (SAT)
2nd MIX AND AGC AMP
2nd MIX AND AGC AMP
IC 11
RF2326
53
1
IC 13
SI4136-BT
11
IC 20
AD8061ART
IC 21
TC7W14FK
13
1
23.920MHZ
3SYS_CLK
1
15
23
17 9
8
2
316 9 17 9
8
ANTENNA
SELECT CIRCUIT
2.5GHz AND IF PLL
4
4
22
TER_IF2
SAT_IF2
5
CTL
12 SAT_AGC
12 TER_AGC
TERRESTRIAL BRANCH
SATELLITE BRANCH
Q2
Q3
CN1
CN2
SAT_IN
TER_IN 1
1
RF MODULE
11
15
22
3
7
6
CN3
IC 202
STA-400
58
DSP MODULE
2
CN201
CDEC
IC 208
STA-450
SSDEC IC 212
AD8131ARM
1
20
IF2SA_N
IF2TA_N 15
IC 203
K4S640832E-TL1H
IC 205
K4S640832E-TL1H
SDRAM
83
34 PCSD1
PCSD
6
5
30
SAGC
TAGC 29
SAT_IF
TER_IF
SAT_AGC
TER_AGC
IC 206
TC7SH86FU
MOBILE
ADAPTER CIRCUIT
IC 207
ST19AF08BR20QMAA
30
XTI/MCLK 33 SYS_CLK
IC 211
PCM1716E-3
2
73
SDO
16 AUDIO_L 27
DAC
CN503
CN502
12
16
21
4
8
5
2
1
6
5
29
28
SYS_CLK
TER_IF2
SAT_IF2
CTL
SAT_AGC
TER_AGC
SAT_IF2
TER_IF2
SAT_AGC
TER_AGC
SYS_CLK
CN801
Q801
Q802
8.1V
Q811
Q810
5.2V
Q814
Q815
3.3V
3
2
1
SYSPW
51
ACCPW
40
LCH
BUP
BUP
BUP
BUP
BUP
ACC
ACC
GND
75
BSENS
73
ASENSFM
Q803
ACC BUP
IC 806
S-80827ANUP-EDQ
12
RESET
1
3.3V 2
S601
RESET
L801
1.4mH
IC 404
NJM4558MD
21
IC 451
NJM2904
1
Q451
7
EF
ANT5V
3.3V(RF)
26
28
30
25
27
29
3.3V(R
VCC
VCC_2
26
28
25
27 3.3V(DSP)
VCC3.3V
20
22
19
21
2.5V(DSP)
VCC2.5V
24 23 13
15
XOUT
XIN
X601
10.00MHz
MAIN UNIT
BATT.
GND
FUSE 2A
ACC
5V REGULATOR
8V REGULATOR
3V REGULATOR
VCC_2 X1
29 30 DAC5V
AUDIO5V
A
B
C
9
11
10
12
13
15
14
16
6
4
2
1
4
IF2TA_P 14
6
GEX-FM903XM
1234
1234
D
C
B
A
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM

SPW
CPW
75
BSENS
73
ASENSFM
RESET
57
CTL
04
58MD
1
IC 601
PD5680A
SYSTEM µ-COM
IC 451
NJM2904M
91
SAT_ANT
92
TER_ANT
SAT_ANT
TER_ANT
1
Q451
7
Q808
Q809
IC 802
UPC7805AHF
31
IC 803
PQ30RV1
21
IC 805
BP5250
62
EF802
EF803
ANT5V 3.3V(DSP)
XMPW
84
XMPW
3.3V(RF)
EF804
2.5V(DSP)
30 7
IPOUT A6
28 5
MODPCK A4
27 4
MODPDO A3
26 3
MODPCE A2
IC 602
TC74VHCT541AFT
13
Y6
15
Y4
16
Y3
17
Y2
UT
N
PLCS
PLDT
PLCK
29
IPIN
IC 403
HA12187FP
1
2
Y5 14
6A5
74
ASENS
Q601
IC 502
BA1404F
18 14
789
P4 P1 P2
MOD1 MOD2 MOD3
IC 501
BU2611AFS
PLL
PLCS
PLDT
PLCK
3
4
5
CE
CK
DA
IC 804
HA178L06UA
1
3
VDD2 13
IC 503
BA4560F
2 1
Q504 Q505
IC 401
BA3131FS
19 -IN2A 1OUT1
IC 402
TA2050F
18
+IN2B
OUT2 14
DISPDT
DISPDT
IC 807
HA178L05UA
13
EF801 Q817
Q818
DAC5V
Q805
Q806 Q807
25
KYDT
32
DISPPW
24
FMMODPW
DISPPW
FMMODPW
2
1
CN802
3
DISPDT
31
DPDT
KYDT KEYDT
6
5
BUS+
BUS-
1
5
BUS+
BUS-
1
5
8
8
ASENB
IN1B
IN1A
15
13
BUSL2
BUSL1
11
7
ASENB
7BUSL3
CN401
CN402
IP-OUT IP-IN
Q401
Q402
Q403
MUTE
MUTE
44
Q502
11
BUSAG3
2
1
3
CN901
Q901
IC 901
PD6294A
23 78
VCC V3
8S0
9S1
X901
4.91MHz
23
X0X1
KYDT
DPDT
LCD 901
CAW1666
KEY MATRIX
DISPLAY UNIT
2
CN501
VR503
VR502
15 17 16 56
X502
38kHz
RF OUT
Q501
RY501
RELAY
RF IN
CN501
CDRFIN
1
1
2
ANTENNA SELECT UNIT
STEREO MODULATOR
SELECTOR
L505
CTC1079
D
E
VDD1 12
15
BUP
7
GEX-FM903XM
5678
5678
D
C
B
A

8
GEX-FM903XM
1234
1234
D
C
B
A
>
Lch
Lch
Level:1.1V
Level:1.1V
C
SYSTEM µ-COM
AMAIN UNIT
BCN3
CCN201
DCN901
>
BU
ACC
GND
FUSE 2A
1K(1/2W)
CEK1018
3.2 MAIN UNIT
Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS
LIST”.
A

9
GEX-FM903XM
5678
5678
D
C
B
A
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.
: The power supply is shown with the marked box.
Lch
Level:1.0V
Composite
Multiplex
FM Mod.
Signal
ECN501
IP-INIP-OUT
A

10
GEX-FM903XM
1234
1234
D
C
B
A
BRF MODULE
B
B-a
3.3 RF MODULE(GUIDE PAGE)
A-a A-b
A-a A-b
A-b
A-a
Large size
SCH diagram
Guide page
Detailed page

11
GEX-FM903XM
5678
5678
D
C
B
A
ACN502
B-b
B

12
GEX-FM903XM
1234
1234
D
C
B
A
BRF MODULE
B-a
B-a B-b
1 2

13
GEX-FM903XM
5678
5678
D
C
B
A
B-a
B-a B-b
4
3

1 2
14
GEX-FM903XM
1234
1234
D
C
B
A
B-a B-b
B-b

4
3
15
GEX-FM903XM
5678
5678
D
C
B
A
ACN502
B-b
B-a B-b

16
GEX-FM903XM
1234
1234
D
C
B
A
3.4 DSP MODULE(GUIDE PAGE)
CDEC
S
ACN503
CDSP MODULE
C
C-a

17
GEX-FM903XM
5678
5678
D
C
B
A
SSDEC
DAC
SDRAM
CAP
ST19AF08BR20QMAA
C-b
C

18
GEX-FM903XM
1234
1234
D
C
B
A
S
CDSP MODULE
C-a
C-a C-b
1 2 3