Motorola GP series User manual

Professional Radio
GP Series
Keypad and Flex
Service Information
Issue: November 2004

ii
Computer Software Copyrights
The Motorola products described in this manual may include copyrighted Motorola computer programs stored
in semiconductor memories or other media. Laws in the United States and other countries preserve for
Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or
reproduce in any form, the copyrighted computer program. Accordingly, any copyrighted Motorola computer
programs contained in the Motorola products described in this manual may not be copied or reproduced in
any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola
products shall not be deemed to grant, either directly or by implication, estoppel or otherwise, any license
under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive royalty-
free license to use that arises by operation of law in the sale of a product.

iii
Table of Contents
Chapter 1 THEORY OF OPERATION
1.0 Keypad and Flexible Connectors .........................................................................1-1
1.1 Keypad ...........................................................................................................1-1
1.2 Flexible Connectors........................................................................................1-1
2.0 Troubleshooting Chart .........................................................................................1-2
Chapter 2 PCB / SCHEMATICS / PARTS LISTS
1.0 Allocation of Schematics and Circuit Boards .......................................................2-1
1.1 Flexible Connectors........................................................................................2-1
1.2 Keypad PCBs .................................................................................................2-1
2.0 PCB/Schematic Diagrams and Parts List: Flexes................................................2-3
2.1 Keypad - Controller Flex.................................................................................2-3
2.2 Universal Connector Flex ...............................................................................2-4
3.0 PCB/Schematic Diagrams and Parts List: Keypad ..............................................2-5
3.1 PCB 8480574Z06 - Diagram ..........................................................................2-5
3.2 PCB 8480574Z06 - Parts List.........................................................................2-7
3.3 PCB 8480682Z04 - Diagrams ........................................................................2-8
3.4 PCB 8480682Z04 - Parts List.......................................................................2-10

iv

Chapter 1
THEORY OF OPERATION
1.0 Keypad and Flexible Connectors
1.1 Keypad
The keypad block diagram is shown in Figure 1-1. U602 is a comparator that will compare the
voltage when any one of the keypad row or keypad column keys is being pressed. Therefore when a
key is being pressed, it will send a message to the microprocessor through the output (KEY_INT)
telling it that a key has been pressed. The microprocessor then sample the analog to digital voltages
at the keypad row and keypad column and map it with a table so that the key pressed being can be
identified. Once the key has been identified, the message that corresponds to the key will show up
at the display.
The LED_EN setting is set by the codeplug. When the value is set to high, the LED does not light up
during power up and vice versa.
Figure 1-1 Keypad Block Diagram
1.2 Flexible Connectors
Flexible ribbon circuits (flexes) are used to connect the keypad and radio front panel components
with the circuit boards. The flexes are locked into place in their connectors by latches which must be
released before the flexes may be disconnected during maintenence disassembly.
Two types of flexible ribbon circuits are used in the radios:
■Keypad/Controller Interconnect flex - used for connecting the keypad with the main board
circuits.
■Universal Flex connector - used to make connections to the Speaker, Microphone and
accessory connector.
40 pin connector
Comparator
Keypad
Button
LED
Display
18 pin connector
Key_Int
Keypad Column
Keypad
Data
Row

1-2 THEORY OF OPERATION
2.0 Troubleshooting Chart
Figure 1-2 Keypad Board Troubleshooting Chart
Display
Keypad
End
Disconnect and
reconnect 18-pin flex
Disconnect and
reconnect 40-pin flex
On
Off
Off
On
if still Off

Chapter 2
PCB / SCHEMATICS / PARTS LISTS
1.0 Allocation of Schematics and Circuit Boards
The printed circuit boards (PCB) and schematic diagrams related to the Flexible Connectors and the
Keypads are shown in the tables below:
1.1 Flexible Connectors
1.2 Keypad PCBs
Table 2-1: Keypad /Controller Flex
Flex : 8480475Z02
Flex Page 2-3
Schematic Page 2-3
Table 2-2: Universal Speaker/Microphone Flex
Flex : 8480549Z05
Flex Page 2-4
Schematic Page 2-4
Table 2-3: Standard Keypad
PCB : 8480574Z06
PCB Layout Page 2-5
Schematic Page 2-6
Parts List Page 2-7
Table 2-4: GP1280 Keypad
PCB : 8480682Z04
Flex Page 2-8
Schematic Page 2-9
Parts List Page 2-10

2-2 PCB / SCHEMATICS / PARTS LISTS

PCB/Schematic Diagrams and Parts List: Flexes 2-3
2.0 PCB/Schematic Diagrams and Parts List: Flexes
2.1 Keypad - Controller Flex
KEYPAD
J100
EXT_MIC
VS_CS
SW_B+
Vddd
VS_AUDSEL
Det_Aud_Snd
Rx_Aud_Rtn
Tx_Aud_Snd
Tx_Aud_Rtn
Flat_Tx_Rtn
Opt_Bd_En
Rdy/Req
Rx_Aud_Snd
ON
INT_EXT_Vdd
Key_Row
Key_Col
PTT
KEY_INT
VS_INT
RESET
LED_EN
OFF_BATT_DATA_OUT
VS_GAINSEL
SrD_Rtn (MISO)
SrD_Snd (DATA)
R_W
LCD_SEL
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A0
SCK_Snd (CLK)
VS_RAC
Gnd
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
CONTROLLER
J200
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
EXT_MIC
VS_CS
SW_B+
Vddd
VS_AUDSEL
Det_Aud_Snd
Rx_Aud_Rtn
Tx_Aud_Snd
Tx_Aud_Rtn
Flat_Tx_Rtn
Opt_Bd_En
Rdy/Req
Rx_Aud_Snd
ON
INT_EXT_Vdd
Key_Row
Key_Col
PTT
KEY_INT
VS_INT
RESET
LED_EN
OFF_BATT_DATA_OUT
VS_GAINSEL
SrD_Rtn (MISO)
SrD_Snd (DATA)
R_W
LCD_SEL
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
A0
SCK_Snd (CLK)
VS_RAC
Gnd
Keypad/Controller Interconnect Flex - Schematic Diagram
98
C
J200
40
J100
40
<- TO KP
8480475Z02 REV A TO CTRL ->
Keypad-Controller Interconnect Flex -- Front
Issue: Revision Detail:
Release Date:
ILLUSTRATOR REGIONDATE
Application :
MEDIA & COMMUNICATIONS DEPT.
DWG. NO.
EDITOR DATE
Adobe Illustrator 7.0
WARIS CONV. MDC UHF
PCB 8480475Z02-A
Ramesh R. 27/08/1998
LN Chan
ZMY0130082
A
Penang
27/08/1998
Comments:
27/08/1998
Penang
Used in 6804110J64
Keypad/Controller Interconnect Flex - Assembly
Keypad - Controller Interconnect Flex (PCB No. 8480475Z02)

2-4PCB/Schematic Diagrams and Parts List: Flexes
2.2 Universal Connector Flex
20
J403
J404
J405
J406
J407
J408
J409
J410
J411
J412
J413
J414
J415
J416
M401
Issue: Revision Detail:
ILLUSTRATOR REGIONDATE
MEDIA & COMMUNICATIONS DEPT.
DWG. NO.
WARIS CONV. MDC UHF
PCB 8480549Z03-B
Ramesh R.
27/08/1998
ZMY0130083
A
Penang
View from Top Side
13 PIN UNIVERSAL CONN
EXT_SPKR+
EXT_SPK-
OPT_B+
EXT_MIC
OPT_SEL_2
OPT_SEL_1
GND
RX_DATA
TX_DATA
J404
J405
J406
J407
J408
J409
J410
J411
J412
SPKR_20
SPKR_20
OPT_B+30
RSSI
RX_AUDIO/TX_AUDIO
BOOT_CTRL
NC
J413
J414
J415
J416
1
2
C402
100pF
M401
GND
INT_SPK+
INT_SPK-
EXT_SPKR+
EXT_SPK-
DPT_B+
EXT_MIC
OPT_SEL_2
OPT_SEL_1
GND
RX_DATA
TX_DATA
GND
RSSI
RX_AUDIO/TX_AUDIO
BOOT_CTRL
NC
MIC
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J403
20 PIN CONN
M400
SPKR_20
SPKR_20
Universal Connector Flex - Schematic Diagram
c98
8480549Z03 rev B
C402
M400
Univers
ILLUSTRATOR DA
EDITOR DA
WARIS CON
PCB 8480549
Ramesh R. 27/0
LN Chan 27/0
View from Bottom Side
Universal Connector Flex (8480549Z05)