7
°ÿBlind Slot : The Slot Before The Active Slot.
°ÿREF CLK : In case of Baseset, It is oscillated continuously.
Blind Slot
-
-
-
Low
-
High
PLL Data
PLL CLK
Low
CLK
-
High
-
-
High
Level Low
STATUS
. Trouble Shooting
1
. Trouble Shooting of RF Module
Check Points
of U10 for
H/S and B/S
Idle Slot
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)
-
-
-
Low
-
Low
-
-
High
-
-
High
-
-
High
Level
Low
Rx
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
-
-
-
-
-
Samsung Electronics
19
Trouble Shooting
20
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
21
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
22
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
23
Samsung Electronics
Trouble Shooting
3-4. No Key Action
HL4
NO KEY ACTION
KEY-SCAN is OK
AT EACH MATRIX
Y E S
N O
1. CHECK EACH CONNECTION
2. CHECK KEY-SCAN STATUS
FROM U10
3. CHECK THE RUBBER is OK
OK
3-5. No Display
HL5
NO DISPLAY
CONNECTIONS of
VDD, SDA, SCL
AND C131 AROUND
LCD
Y E S
N O
MAKE THE CONNECTIONS CORRECT
LCD is OK
OK
N O
24
Samsung Electronics
1. REPLACE LCD
2. CHECK SDA AND SCL PATTERNS
3-6. No Beeptone / No Ring
HL6
NO BEEPTONE, BELL
Trouble Shooting
U10 GENERATES
SIGNAL AT
PIN61,62
Y E S
BUZZER is OK
OK
N O
N O
CHECK U10
1. REPLACE BUZZER
2. CHECK PATTERNS AND
AROUND COMPONENTS
25
Samsung Electronics
Trouble Shooting
3-7. Charge Failure
HL7
NO CHARGE
THE
VOLTAGE
OF CONTACT
TERMINALS
>4 V
N O
GO TO BL4
Y E S
Q20
TURNS
ON
N O
Q18
TURNS
ON
N O
CHECK Q18, R126, R125
AND U10
Y E S
Y E S
CHECK D1, BATTERY AND
BATTERY SPRING
CHECK R124, R123 AND Q20
26
Samsung Electronics
4
. Trouble Shooting of Baseset Logic
4-1
. Power Problem
BL1
POWER PROBLEM
Trouble Shooting
INPUT
VOLTAGE of
C163 > 9 V
Y E S
DC
OUTPUT
VOLTAGE of
U160=5 V,U161=8 V
U162=5.7 V
U170=3.3 V
Y E S
VCC of U100 is 3.3 V
DC
N O
N O
N O
1. CHECK PERFORMANCE of
ADAPTOR
2. CHECK ISOLATION BETWEEN
VCC AND GND
CHECK U160-U162,U170 AND ITS
CONCERNED COMPONENTS
CHECK PATTERNS BETWEEN
MPU (U10) AND REGULATORS
(U160-U162,U170)
Y E S
OK
27
Samsung Electronics
Trouble Shooting
4-2. No Work
BL2
NO WORK
RING LED
TURNS ON FOR A
MOMENT
N O
CLOCK CIRCUIT
WORKS
Y E S
RESET
PULSE CAN BE
FOUND AT THE PIN99
OF U100
Y E S
POWER is
SUPPLIED TO
U135
Y E S
Y E S
N O
N O
Y E S
N O
Y E S
OK
CHECK X101 AND VCC of U100
CHECK C121,Q121,Q122 AND U170
GO TO BL1
DATA AND
ADDRESS BUS is
ACTIVE
Y E S
OK
N O
28
Samsung Electronics
CHECK U110 AND CONCERNED
COMPONENTS
4-3. No Ring
BL3
NO RING
Trouble Shooting
SQUARE
WAVE IN THE
PIN4 OF U20
Y E S
SQUARE
WAVE IN THE PIN 57
OF U100
Y E S
CHECK U100
4-4. Charge Failure
N O
N O
GO TO HL6
CHECK LINE CONNECTION
CIRCUIT, ZD26, U20 AND
CONNECTED COMPONENTS
CHECK PATTERN
BL4
IN PUT
VOLTAGE OF
C161 > 9 V
Y E S
DC
CHECK R161, CN3 AND
CONTACT SPRING
N O
CHECK POWER ADAPTOR,
CN2 AND PATTERN
GO TO HL7
29
Samsung Electronics
Trouble Shooting
4-5. Failure of Hook-off
FAILURE of HOOK-OFF
BL5
48 V
DC
is FED TO TIP AND
RING
Y E S
DOES RELAY WORK?
Y E S
IN THE OFF
HOOK MODE,
VOLTAGE AT PIN1
OF U50 > 5
Y E S
OK
N O
N O
N O
1. CHECK TEL-LINE CONNECTION
2. CHECK ISOLATION BETWEEN
TIP AND RING
3. CHECK MODULAR JACK(CN1)
1. CHECK VCC of RELAY AND
PERFORMANCE of RELAY
2. CHECK Q31,Q32 AND PIN71 of U100
1. CHECK Q42,Q43 AND ZD41
2. CHECK U50 WORKS AND
PERFORMANCE of COMPONENTS
30
Samsung Electronics
4-6. Failure of Tone Dialing
BL6
FAILURE of
TONE DIALING
Trouble Shooting
CHECK
THE DIALING MODE
is TONE
Y E S
DTMF CAN
BE FOUND AT PIN5
of U50
Y E S
DTMF CAN
BE FOUND AT TIP
AND RING
Y E S
OK
N O
N O
N O
CHANGE DIALING MODE
TO TONE MODE
CHECK U70,R63,C66 AND
PIN46 of U100
CHECK ALL COMPONENTS
CONCERNED WITH HOOK-OFF
FAILURE
31
Samsung Electronics
Trouble Shooting
4-7. Failure of Pulse Dialing
FAILURE of PULSE DIALING
BL7
CHECK
THE DIALING MODE
is PULSE
Y E S
PULSE
is DERIVED TO Q44
of BASESET
Y E S
Q42, Q43 AND Q44
WORKS
Y E S
PULSE
CAN BE FOUND AT TIP
AND RING
Y E S
N O
N O
N O
N O
CHANGE TO PULSE MODE
CHECK PATTERNS
of CONTROL PORT
1. CHECK ITS BIAS
2. CHECK PERFORMANCE of Q44
CHECK ALL COMPONENTS
CONCERNED TO HOOK-OFF
FAILURE
OK
32
Samsung Electronics
4-8. TX Audio Failure
BL8
TX AUDIO FAILURE
Trouble Shooting
AF SIGNAL
CAN BE FOUND
AT PIN45 AND
46 of U100
Y E S
AF SIGNAL
is FOUND AT PIN1
of U50
N O
PIN6 of U50 is HIGH
Y E S
CHECK U50
Y E S
N O
Y E S
N O
CHECK U100 AND IT’S ARROUND
PATTERNS
CHECK TEL-LINE CONNECTION
CHECK THE PIN55 of
U100,R77 AND R78
GO TO HL3
33
Samsung Electronics
Trouble Shooting
4-9. RX Audio Failure
RX AUDIO FAILURE
BL9
AF SIGNAL
CAN BE FOUND AT PIN7
of U50
Y E S
AF SIGNAL
CAN BE FOUND AT
PIN12 of U50
Y E S
AF SIGNAL
CAN BE FOUND AT
PIN36 ,37OF U100
Y E S
GO TO HL2
N O
N O
N O
GO TO BL5
CHECK PERFORMANCE of U50
CHECK PATTERNS AND
SOLDERING AROUND
U50 AND U100
34
Samsung Electronics
Repair
Trouble Shooting
4-10. Answering Function Problem
BL10
N O
N O
N O
N O
Check
OGM or Memo
REC.
Y E S
Check MIC
Y E S
Check pin2 of
U250
Y E S
Check pin8 of
U250
Y E S
Y E S Y E S
Check ICM REC.
Y E S
Repair
N O
Check pin12
of U50
Y E S
N O
Check pin13 of
U70-3
Y E S
Repair
N O
N O
N O
N O
Check
OGM PLAY
Y E S
Check pin25
of U210
Y E S
Check pin6 of
U215
Y E S
Check pin3 of
U215
Y E S
Check pin3
of U220
Y E S
Repair
N O
Line Play
Check pin13
of U230-4
Y E S
N O
Check pin9 of
U230-3
Y E S
N O
Check pin8 of
U230-3
1 2
A
35
Samsung Electronics
N O
Check pin5 of
U220
Y E S
B
N O
Check pin14 of
U230-4
Y E S
N O
Check
pin3,pin4 of
U70
Y E S
3
C
Trouble Shooting
1 2
N O
A
Check pin15 of
U215
Y E S
N O
Check pin11 of
U215
Y E S
N O
Check pin27 of
U210
Y E S
OK
N O
B
Y E S Y E S
Check
CN220 &
3
N O
Check
pin1,pin15 of
Speaker
Y E S
Y E S
OK OK
C
U70
36
Samsung Electronics
4-11. No Reset of Answering Function Part
BL11
Adaptor Power IN
Component Pin Array
DATA OUT FROM
U100, 68 PIN
Y E S
DATA IN TO U300
89 PIN
Y E S
DATA
OUT FROM
U300, 90 PIN
Y E S
DATA
IN TO U100 65 PIN
N O
N O
N O
N O
BL3
CHECK R316, Q313
DATA OUT FROM
U300, 90 PIN
Y E S
CHECK THE
Q151, Q152, Q153
CHECK R323
N O
CHECK THE
OPERATION OF U300
Y E S
RESET
PULSE OUT FROM
U100, 67 PIN
Y E S
RESET PULSE
IN TO U300 12 PIN
Y E S
END
N O
CHECK THE 48 & 50 PINS OF U100
Q314, R321, 88 & 91 PIN OF U300
N O
Samsung Electronics
CHECK THE R314, Q311, Q312
37
Component Pin Array
4-12. No Answering Function Operating when the ringing signal is received
BL12
IS THE RINGING
SIGNAL
Y E S
DATA IN TO
U300, 89 PIN
Y E S
DATA OUT FROM
U300, 90 PIN
Y E S
HOOK RELAY
(RE1-1) OFF
N O
N O
N O
N O
Y E S
BL3
CHECK THE R316, Q313
CHECK OPERATION OF U300
CHECK THE Q31, Q32
CHECK THE TEL LINE
INTERFACE CONNECTION
Y E S
END
38
Samsung Electronics
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