PIONEER GEX-FM903XM Service 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 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

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.

W

ARNING

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

36

35

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

7

IC 9

MAX2682EUT

3 4

1

F15

5

IC 17

AD61009ARS

14

6

F1

IC 8

MAX2682EUT

3 4

F16

5

IC 18

AD61009ARS

14

6

F10

IC 12

RF2325

3

5

1st IF (TER)

1st IF (SAT)

2nd MIX AND AGC AMP

2nd MIX AND AGC AMP

IC 11

RF2326

5

3

1

IC 13

SI4136-BT

11

IC 20

AD8061ART

IC 21

TC7W14FK

13

1

23.920MHZ

3

SYS_CLK

1

15

2

3

17

9

8

2

3

16 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

5

8

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

2

1

IC 451

NJM2904

1

Q451

7

EF

ANT5V

3.3V(RF)

26

28

30

25

27

29

3.3V(R

VCC

VCC_2

262825

27

3.3V(DSP)

VCC3.3V

202219

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

91110

12

13

151416

6

4

2

1

4

IF2TA_P

14

6

GEX-FM903XM

1

23

4

1234

D

C

B

A

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

75

BSENS

73

ASENSFM

RESET

57

CTL

1

IC 601

PD5680A

SYSTEM µ-COM

IC 451

91

SAT_ANT

92

TER_ANT

SAT_ANT

TER_ANT

Q451

7

Q808

Q809

IC 802

UPC7805AHF

3

1

IC 803

PQ30RV1

2

1

IC 805

BP5250

6

2

EF802

EF803

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

PLCS

PLDT

PLCK

29

IPIN

IC 403

HA12187FP

1

2

Y5

14

6

A5

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

1

OUT1

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
BUSL1117

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

8

S0

9

S1

X901

4.91MHz

2

3
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

5

6

78

5

6

78

D

C

B

A

8

GEX-FM903XM

1

23

4

1234

D

C

B

A

>

Lch

Lch

Level:1.1V

Level:1.1V

C

SYSTEM µ-COM

A

MAIN UNIT

B

CN3

C

CN201

D

CN901

>

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

5

6

78

5

6

78

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

E

CN501

IP-INIP-OUT

A

10

GEX-FM903XM

1

23

4

1234

D

C

B

A

B

RF 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

5

6

78

5

6

78

D

C

B

A

A

CN502

B-b

B

12

GEX-FM903XM

1

23

4

1234

D

C

B

A

B

RF MODULE

B-a

B-a

B-b

1

2

13

GEX-FM903XM

5

6

78

5

6

78

D

C

B

A

B-a

B-a

B-b

4

3

1

2

14

GEX-FM903XM

1

23

4

1234

D

C

B

A

B-a

B-b

B-b

4

3

15

GEX-FM903XM

5

6

78

5

6

78

D

C

B

A

A

CN502

B-b

B-a

B-b

16

GEX-FM903XM

1

23

4

1234

D

C

B

A

3.4 DSP MODULE(GUIDE PAGE)

CDEC

S

A

CN503

C

DSP MODULE

C

C-a

17

GEX-FM903XM

5

6

78

5

6

78

D

C

B

A

SSDEC

DAC

CAP

ST19AF08BR20QMAA

C-b

C

18

GEX-FM903XM

1

23

4

1234

D

C

B

A

S

C

DSP MODULE

C-a

C-a

C-b

1

2

3

19

GEX-FM903XM

5

6

78

5

6

78

D

C

B

A

CDEC

A

CN503

C-a

4

C-a

C-b

1

2

3

20

GEX-FM903XM

1

23

4

1234

D

C

B

A

DAC

SDRAM

CAP

ST19AF08BR20QMAA

C-a

C-b

C-b

4

21

GEX-FM903XM

5

6

78

5

6

78

D

C

B

A

SSDEC

ST19AF08BR20QMAA

C-b

C-a

C-b

22

GEX-FM903XM

1

23

4

1234

D

C

B

A

3.5 DISPLAY UNIT

D

22

KEY CONTROL

AND

LCD DRIVER

D

DISPLAY UNIT