Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung DVD DVD-HR773 DVD HR775 HR773 HR776 HR777 CH7
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7. Schematic Diagrams
7-1 All block Diagram ----------------------------------------------------------------------------------------7-2 Note
For schematic Diagram
7-2 Power------------------------------------------------------------------------------------------------------------7-3 - Resistors are in ohms, 1/8W unless otherwise noted.
7-3 S.M.P.S_01 (SMPS PCB) -------------------------------------------------------------------------------7-5 Special note :
Most semiconductor devices are electrostatically sensitive and therefore require the special handling techniques
described under the "electrostatically sensitive (ES) devices" section of this service manual.
7-4 S.M.P.S_02 (SMPS PCB) -------------------------------------------------------------------------------7-6
Note :
7-5 MS9411 CODEC (Main PCB) -------------------------------------------------------------------------7-7 Do not use the part number shown on this drawing for ordering. The correct part number is shown in the parts list
(may be slightly different or amended since this drawing was prepared).
7-6 DRAM (Main PCB) -----------------------------------------------------------------------------------------7-8
Important safety notices :
7-7 ATAPI (Main PCB) -----------------------------------------------------------------------------------------7-9 Components identified with the mark have the special characteristics for safety. When replacing any of these
components. Use only the same type.
7-8 Bridge SATA TO PATA (Main PCB) --------------------------------------------------------------7-10
7-9 Video Decoder (Main PCB) ------------------------------------------------------------------------7-11
7-10 IO_Micom (Main PCB) ------------------------------------------------------------------------------7-13
7-11 AV_Switching IC (Main PCB) -------------------------------------------------------------------7-14
7-12 IO Jack (Main PCB) -----------------------------------------------------------------------------------7-16
7-13 TM Block (Main PCB) --------------------------------------------------------------------------------7-18
7-14 Power Source (Main PCB) -----------------------------------------------------------------------7-19
7-15 IEEE1394 PHY (Main PCB) -----------------------------------------------------------------------7-20
7-16 HDMI (Main PCB) --------------------------------------------------------------------------------------7-21
7-17 Front AV Sub (Front PCB) ------------------------------------------------------------------------7-22
7-18 Function (Function PCB)--------------------------------------------------------------------------7-23
Samsung Electronics This Document can not be used without Samsung's authorization 7-1
Schematic Diagrams
7-1 All block Diagram
Video Signal Audio Signal MAIN & JACK Function Front
DRAM FLASH
JMH330 SIF
32M 29GL032
(BIC1) (DIC1,2) (DIC3)
RF_CVBS
SATA HDD
HDMI TRANSMITTER
PHY
DV IN TDA9984
TSB41AB1
(HIC1)
(DVIC)
CODEC
COXIAL
MS9411
SPDIF OPTICAL
(MIC1)
USB
L&R AV OUT
&
CVBS
COMPONENT
Y/Pb/Pr OUT
YCbCr/YC
I2S BT.656 I2S CVBS
A/V L&R
SWITCHING SCART
CVBS
MM1763AJBE AV1
(MUIC) RGB (TV)
AV1 IN
RF_LR
L&R
F-A/V Video DECODER DAC_LR
(AV3) CVBS SAA7138 L&R
(VIC1) AUDIO_IN CVBS SCART
AV2
CVBS_IN AV2 IN (EXT)
RGB
FRONT MICOM
Function/Display Driver
D78F0525 PT6315A
(FIC1) (IC701)
7-2 This Document can not be used without Samsung's authorization Samsung Electronics
Schematic Diagrams
7-2 Power
7-2-1 About S.M.P.S (Ringing Choke Converter Method) (b) SNUBBER Circuit :
RIS02, RIS03, CIS08, CIS07, DIS05
Terms
1) 1st : Common power input to 1st winding.
1) Prevent residual high voltage at the terminals of
2) 2nd : Circuit followings output winding of transformer.
switch during switch off/Suppress noise.
3) f (Frequency) : Switching frequency (T : Switching cycle)
High inverted power occurs at switch off,
4) Duty : (Ton/T) x 100
because of the 1st winding of transformer :
(V=-L1 xdi/dt. L1 : Leakage Induction)
7-2-2 Circuit description [FLY-Back RCC(Ringing Choke Converter)] Control A very high residual voltage exist on both terminals
of ICIS01 because dt is a very short.
(a) AC Power Rectification/Smoothing Terminal
1) A01~04 : Convert AC power to DC (Wave rectification). 2) SNUBBER circuit protects ICIS01 from damage
2) CIS01 : Smooth the voltage converted to DC. through leakage voltage suppression by RC,
3) LIS01, LISO2, CIS04, CIS05 : Noise removal at power input/output. (Charges the leakage voltage to DIS05 and CIS08
4) RIS04 : Rush current limit resistance at the momemt of power cord insertion. and discharges to RIS03, RIS02).
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