Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung DVD DVD-HR755 DVD-HR755 DVD-HR755EUR troubleshooting
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5. Trouble Shooting
NO Power Detected
(Stand by LED OFF)
No
PAFT1 is normal? Change fuse
Yes
6pin of AIC1 in the No
function key is normal? Change AVFP1 LED Module
Yes
PVDLL1, PSDZ1 No Change short circuited or
PFZZ1, PVZL1 SHOR and OPEN opened parts
Are normal?
Yes
Is there No
voitage at Collector of Check 2st voltage
QISO1
Yes
Operation of QISO1 No
Replace QISO1
is Normal?
Yes
Check feed back ICISO1
Samsung Electronics 5-1
Trouble Shooting
CVBS Video (AV1, RCA)
11pin in MCN2 No
of jack PCB or CON2 of Main PCB Check the DIC1 on Main PCB
has normal level?
Yes
Analog signals No Check the connection between
are inputed normally
11pin MCN2 of Jack PCB and IC216
IC216(pin 31,33)
Yes
Power is
No Check the connection between
normal(5V) at IC216
(pin 30, 34) IC216 nad BCN2A(pin 5, 6)
Yes
I2C singles in No Check the connection between
IC216(pin16, 18) are swinged IC216(pin16, 18) and
between 0~5V? FIC1(pin 27,28)
Yes
Video signal of No Check the connection between
About P-P1V appears at IC216 and output jack
Output jack?
Yes CVBS(Color-bar)
Check the RCA cable
# IF Recorder is under PSO(progressive scan output) MODE, it
does not output the CVBS& S-Video, RGB signal.
5-2 Samsung Electronics
Trouble Shooting
Component (Y, Cb, Cr) output error
2/4/6 Pin in MCN2 No
of Jack PCB or CON2 of Main PCB Check the DIC1 on MAIN PCB
has normal level?
Yes
Analong signals No Check the connection between
are inputted normally IC216 pin 2, 4, 6 in MCN2 of Jack
(pin 27,28,29) PCB and IC216
Y(Color-bar)
Yes
Power is normal No Check the connection between
(5V) at IC216(pin 30,34) IC216 and BCN2A(pin5, 6)
Yes
Pb(Color-bar)
I2C singnal in No Check the connection between
IC216(pin16, 18) are swinged IC216 (pin16,18)
between 0~5V? and FIC1 (pin27, 28)
Yes
Pr(Color-bar)
Video signal No Check the connection between
of About P-P1V appears at IC216 and output jack
Output Jack?
Yes
Check the RCA cable
# IF Recorder is under PSO(progressive scan output) MODE,
or it does not output the CVBS& S-Video signal.
Samsung Electronics 5-3
Trouble Shooting
S-Video output error
10pin and
8pin in MCN2 of Jack PCB No
Check the DIC1 on Main PCB
or CON2 of Main PCB has
normal level?
Yes
Analog signals No Check the connection between
are inputted normally IC216 10pin and 8pin in MCN2 of
(pin331, 33) Jack PCB and IC216
Yes
Power is normal (5V) No Check the connection between
at IC216(pin30, 34) IC216 and BCN2A pin5, 6)
Yes
I2C signal in No Check the connection between
IC216(pin16, 18) are swinged IC216(pin16, 18) and
between 0~5V FIC1(pin27, 28)
Yes
Video signals No
of about P-P1V appears at Check the connection between
output jack? IC216 and output jack
Y(Color-bar) C(Color-bar)
Yes
Check the S-Video cable
5-4 Samsung Electronics
Trouble Shooting
AV1 (RGB) Output Error
2,4 and
6 pin in MCN2 of Jack No
PCB or CON2 of Main PCBhas Check Main PCB
normal level?
Yes
Analog signals No Check the connection
are inputted normally IC216 between 2,4 and 6pin in MCN2 of
(pin27,28,29) Jack PCB and IC216
Yes
Power is normal No Check the connection between
at IC216(pin30, 34) IC216 and BCN2A (pin5, 6)
Yes
RGB control No Check the connection between
signal level is 2~3V at 16pin of
pin 51 of FIC1 and AV1 JACK
SJACK (AV1JACK)?
Yes
RGB Video No Check the connection between
signal appears at 7,11,15pin of
IC216 and output jack
AV1 output jack?
Yes
Check the RCA cable
# IF Recorder is under Component mode (in OSD setup menu),
it does not output RGB out put.
Samsung Electronics 5-5
Trouble Shooting
AV2 (RGB) Input Error
Video signal of
No
about 0.7V appears at input jack? Check the Scart cable
(28, 32, 36pin of AV2)
Yes
RGB control No
signal level is 4V at 27pin of Check Video out of TV is set RGB
SJACK (AV1JACK)? mode
Yes
Power 5V is nomal No Check the SMPS(AL5.8V)
at IC216(pin30, 34) and BCN2A(pin2,3)
Yes
MCN2 pin(17,19,21)
of Jack PCB or CON2 of Main PCB
has normal level?
Yes
Check Main PCB
5-6 Samsung Electronics
Trouble Shooting
AV3 CVBS Video Input Error
Pin 8 in IC216 No Check the connection between
has normal level? pin8 in IC216 and AV3 pin-jack
Yes
I2C singnals in No Check the connection between
IC216(pin16, 18) are swinged IC216(pin16m 18) and
between 0~5V? FIC1(pin27,28)
Yes
MCN2-11 of No Check the connection between
Jack PCB or CON2 of Main PCB MCN2-11 of Jack PCB and
has normal level? pin 35 in IC216
Yes
Change Main PCB
Samsung Electronics 5-7
Trouble Shooting
There's no Digital Audio Out
Check Current Digital No Check the A/V No
Audio Setting is PCM Receiver can Decode Current Set the Bitstream
Bit-Steam
Yes Yes
ChecK Digital No
Audio data PIN20 of CON2 Replace Main PCB
(Main PCB)
Yes
No
Check 5V SJACK3 Replace SJACK3
Yes AUDIO DATA
Check the Cable
5-8 Samsung Electronics
Trouble Shooting
AV3 Audio Input is not Recording
I2C singnals in No Check the connection
IC216(pin16, 18) are swinged between IC216(pin16m 18)
between 0~5V? and FIC1(pin27,28)
Yes
Check audio No Check the around supply
signal (41,42 pin of IC216)
voltage of IC216.
wave form.
Yes
Check the No
supply voltage of VIC1 3.3V Replace Main PCB
(Main PCB)
Yes
Check output I2S No
singnal of audio DAC (VDR48, Replace Main PCB
VDR54,VDR55,VDR56)
Digital clock(10)->VDR48 Digital clock(11)->VDR54
Yes
Check the passive parts
around jack pin.
Digital clock(12)->VDR55 Digital clock(15)->VDR56
Samsung Electronics 5-9
Trouble Shooting
There is no Audio Output
Check he audio No
signal AR413 and AR473 Check the passive parts around
(Jack PCB) Audio Jack pin.
Yes
Check the No
supply voltage of of VIC13.3V Check SMPS
(Main PCB)
Yes
Check the audio No
out signal, pin28,29 of CON2 Replace Main PCB
(Main PCB)
Yes
Check I2S No
singnal of audio ADC Replace Main PCB
(VDR56)
Yes AUDIO DATA VDR56
Check connection between Main connector
(CON2,CON3) and Jack connector (MCN2,MCN3)
5-10 Samsung Electronics
Trouble Shooting
Disc Loading Error
Are Main No
and deck power OK? Check he power
(5v, 12v)
Yes
Is the 40pin No
FFC cable(betweenmain & deck) Reinsert FFC cable correctly
inserted correctly?
Yes
Is the wavefrom No
of IC203 pin26 normal? Change the Main board
(Main PCB)
Yes IC203-Pin26
Change the deck
Samsung Electronics 5-11
Trouble Shooting
Tuner Video Out Abnormal
No
Tuner input line signal Tuner line connect TV directly
is OK? (Jack PCB)
Yes
Supplied
power fortuner is OK? No
Check SMPS (AL5.8V and 33V)
pin1, 3 : 5V
pin16 : 33V
Yes
No
I2C signal pic11, 12 Check between pin 11, 12 of
of tuner is OK? tuner and FIC1.
Yes
Video output No
signal of Tuner is OK? Replace TM (tuner) block.
(jack PCB)
Yes Tuner Video
Refer to AV3 Video line error
5-12 Samsung Electronics
Trouble Shooting
Tuner Audio Out Abnormal
No
Tuner line signal is OK? Tuner line connect TV directly.
Yes
Supplied No Check its power line or
power for VIC1 (3.3V)is OK?
around elements
(MAIN PCB)
Yes
5.5MHz signal from No
Check the SIF signal or tuner
15 pin of tuner is OK?
Yes Tuner Audio
If Audio R/L signal (30,31pin of NIC1)
is normal, refer to AV3 Audio Line in error
Samsung Electronics 5-13
Trouble Shooting
Remocon Not Working
ARM1(pin1) signal No
Check the power(pin2) line
is OK? (Key PCB) of ARM1 is 5V.
Yes
FIC1(58pin) signal No Check between FIC1(58pin)
is OK? (Jack PCB) and ARM1(1pin).
Yes
Change AIC1 or around elements
5-14 Samsung Electronics
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