Pantech PG-1810, Service Manual

Page: 2 / 54

PG-1810 Service Manual
PANTECH R&D CONFIDENTIAL
1
CONTENTS
SECTION 1 INTRODUCTION .............................................................................................................3
1.1 I
NTRODUCTION
..............................................................................................................................3
1.2 F
REQUENCY
A
LLOCATION AND
I
TS
U
SE
...........................................................................................3
1.3 I
TEM
N
AME AND
U
SE
.....................................................................................................................4
1.4 C
HARACTERISTICS
........................................................................................................................4
SECTION 2 ELECTRICAL SPECIFICATIONS....................................................................................5
2.1 G
ENERAL
......................................................................................................................................5
2.2 T
RANSMITTER
…………………………………………………………………………………………….5
2.3 R
ECEIVER
…………………………………………………………………………………………………5
SECTION 3 OPERATION....................................................................................................................6
3.1 N
AME OF EACH
P
ART
…..……………………………….…………………………………………………6
3.2.D
ISPLAY
..………………….…………………………….………………………………………………..7
3.3 KEYPAD …………………………………….………….………………………………………………..7
3.4 BLUETOOTH MODULE…………………………………………………………………………………8
SECTION 4 THEORY OF OPERATION..............................................................................................9
4.1 L
OGIC
S
ECTION
.............................................................................................................................9
4.1.1 D
C DISTRIBUTION AND
R
EGULATION
P
ART
…………………………………………………………….9
4.1.2 L
OGIC
P
ART
…………………………………………………………………………………………….9
4.1.2.1 S
UMMARY
…………………………………………………………………………………………….10
4.1.2.2 B
ASEBAND
D
IGITAL
S
IGNAL
P
ROCESSING
…………………………………………………………11
4.1.3 M
EMORY
P
ART
………………………………………………………………………………………..14
4.1.4 N
OTIFICATION
P
ART
..................................................................................................................14
4.1.5 K
EY
P
AD
P
ART
.........................................................................................................................14
4.1.6 LCD M
ODULE
(D
ISPLAY
P
ART
) ..................................................................................................14
4.2 R
ADIO
T
RANSCEIVER
S
ECTION
.....................................................................................................15
4.2.1 DC D
ISTRIBUTION AND
R
EGULATION
P
ART
.................................................................................16
4.2.2 TRANSCEIVER PIN DESCRIPTION…………………………………………………….……….16
4.2.3 R
ECEIVE
S
ECTION
………………………………………………………………………………….…17
4.2.3.1 A
N
O
VERVIEW OF
R
ECEIVE SECTION
......................................................................................17
4.2.3.2 R
ECEIVER
P
ART
……………………………………………………………………………….……19
4.2.4 T
RANSMIT
S
ECTION
..................................................................................................................20
4.2.4.1 A
N
O
VERVIEW OF
T
RANSMIT
S
ECTION
....................................................................................20
4.2.4.2 T
RANSMITTER
P
ART
...............................................................................................................21
4.2.5 O
FFSET
P
LL
……………………………………………………………………………….…………..22
4.2.5.1 A
N
O
VERVIEW OF
OFFSET PLL............................................................................................22
4.2.5.2 V
CTCXO
(
VOLTAGE CONTROLLED TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR
):V801….22
SECTION 5 ALIGNMENT PROCEDURE..........................................................................................24
5.1 R
ECOMMENDED
T
EST
E
QUIPMENT
...............................................................................................24
5.2 C
ONNECTION OF
T
EST
E
QUIPMENT
..............................................................................................24
SECTION 6 EQUIPMENT REPAIR PROCEDURE ...........................................................................25
6.1
NO POWER ON WITH BATTERY APPLIED
..........................................................................................25
6.1.1 P
OWER
C
HECK
.........................................................................................................................25
6.1.2 O
SCILLATION
C
HECK
...............................................................................................................28
6.1.3 K
EYPAD
L
ED
N
OT
I
N
O
PERATION
(3-C
OLOR
AND
B
LUE
)..............................................................29
6.1.4 L
CD
E
L
B
ACKLIGHT
L
ED
N
OT
I
N
O
PERATION
(W
HITE
)..………………………………………… …30
6.2 AUDIO PART(E
ARPIECE
, H
ANDS FREE
E
ARPHONE
, M
ICROPHONE
, H
ANDS FREE
M
IC
)..................31
6.2.1 N
O
R
ECEIVING
T
ONE
H
EARD
(E
ARPIECE
) .................................................................................31
6.2.2 M
ELODY OR
MP3
IS NOT RINGING
.............................................................................................32
6.2.3 N
O
R
ECEIVNG TONE AND MELODY OR
MP3
HEARD
( H
ANDS
-
FREE
E
ARPHONE
)...........................34
6.2.4 H
OOK
S
WITCH NOT WORKING
....................................................................................................35
6.2.5 S
IDE
T
ONE
N
OT TRANSMITTED
(M
IC
) .........................................................................................36