Samsung SPR5100D, SPR5100MD, SPR5100, SPR5100DY-XEG Troubleshooting
7
. Trouble Shooting
1
. Trouble Shooting of RF Module
Check Points
of U10 for
H/S and B/S
T_ENABLE
(PIN4)
T_PWR_RMP
(PIN5)
T_GMSK
(PIN7)
VCO_BND_SW
(PIN8)
SYNTH_LOCK
(PIN9)
S_ENABLE
(PIN10)
S_DATA
(PIN11)
S_CLK
(PIN12)
S_PWR
(PIN13)
REF_CLK
(PIN14)
VDD_RF
(PIN16)
SLICE_CTRL
(PIN18)
R_DATAP
(PIN20)
R_DATAM
(PIN21)
R_ENABLE
(PIN22)
RSSI_AN
(PIN23)
Idle Slot
-
-
-
Low
-
Low
-
-
High
-
-
High
-
-
High
Level
Low
Rx
Blind Slot
-
-
-
Low
-
High
PLL Data
PLL CLK
Low
CLK
-
High
-
-
High
Level Low
STATUS
Active Slot
-
-
-
Low
2.9 V
Low
-
-
Low
CLK
2.9 V
Low For
Short Time
Demodulated
Output Signal
Approximately
1.4 V
Low
Level High
(Over 1 V)
Idle Slot
High
Low
High
High
-
Low
-
-
Low
-
-
-
-
-
-
-
Tx
Blind Slot
High
Low
High
High
-
High
PLL Data
PLL CLK
Low
CLK
-
-
-
-
-
-
Active Slot
High
High
Transmit
Data
High
2.9 V
Low
-
-
Low
CLK
2.9 V
-
-
-
-
-
Blind Slot : The Slot Before The Active Slot.
REF CLK : In case of Baseset, It is oscillated continuously.
17
Samsung Electronics
Trouble Shooting
18
Samsung Electronics
2
. Base/Remote connections between RF Module and U
10
3
. Trouble Shooting of Handset Logic
3-1
. Power Problem
HL1
NO WORKING
POWER PROBLEM
Trouble Shooting
BATT
VOLTAGE
> 3.4 V
Y E S
PIN 4 of
U14 is 3.3 V
Y E S
U10 WORKS
Y E S
OK
N O
N O
N O
CHARGE FULLY
CHECK U14,Q15 and U11
U10 PROBLEM
19
Samsung Electronics
Trouble Shooting
3-2. No RX Audio
LOGIC/HARDWARE
HL2
NO AUDIO (RX)
PROBLEM
AF SIGNAL
is FOUND AT PIN45,46
of U10
Y E S
AF SIGNAL
is FOUND THROUGH
THE RECEIVER
UNIT
Y E S
OK
N O
N O
GOTO RF MODULE
1. CHECK THE RECEIVER UNIT
2. CHECK COMPONENTS
AND PATTERNS
20
Samsung Electronics
3-3. No TX Audio
Trouble Shooting
HL3
NO AUDIO (TX)
LOGIC/HARDWARE
PROBLEM
AF SIGNAL is
FOUND AT PIN39,40
of U10
Y E S
AUDIO DATA
is FOUND AT
PIN 70 OF U10
Y E S
OK
N O
N O
RF MODULE PROBLEM
1. CHECK MIC PERFORMANCE
2. CHECK MIC BIAS
3. CHECK COMPONENTS AND
PATTERNS
CHECK U10
21
Samsung Electronics
Loading...