CH7.pdf

7. Schematic Diagrams

7-1 All block Diagram ----------------------------------------------------------------------------------------7-2

Note

7-2 Power------------------------------------------------------------------------------------------------------------7-3

● For schematic Diagram

- Resistors are in ohms, 1/8W unless otherwise noted.

7-3 S.M.P.S (S.M.P.S 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 Anlog Audio (2ch)/Video (CVBS, Component)(Main PCB)-------------------------7-6

7-5 NAND Flash, FlexOneNand (Main PCB) ------------------------------------------------------7-8

Note :

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 HDMI Transmitter (SIL9134)(Main PCB) -----------------------------------------------------7-9

7-7 7440 Boot Strap Option (Main PCB) ---------------------------------------------------------7-10

Important safety notices :

Components identiied with the mark have the special characteristics for safety. When replacing any of these

components. Use only the same type.

7-8 7440 EBI_ADDR, EBI_DATA (Main PCB) ----------------------------------------------------7-11

7-9 7440 Clocks, BBS (Main PCB) -------------------------------------------------------------------7-12

7-10 7440 Power, Decoupling (Main PCB)------------------------------------------------------7-13

7-11 DDR2 BANK0, BANK1 (Main PCB) -----------------------------------------------------------7-14

7-12 Front Micom (Main PCB)--------------------------------------------------------------------------7-15

7-13 Ethernet, USB, S-ATA, P-ATA (Main PCB) ------------------------------------------------7-16

7-14 GPIO Block (Main PCB) ----------------------------------------------------------------------------7-17

7-15 Main Power (Main PCB) ---------------------------------------------------------------------------7-18

7-16 BCM7620 (F/E)(Main PCB)-----------------------------------------------------------------------7-19

7-17 Local (Sub PCB)(BD-P1620 ONLY)-----------------------------------------------------------7-20

7-18 Front Key (Front PCB) ------------------------------------------------------------------------------7-21

7-19 Touch Key PCB (Touch PCB) --------------------------------------------------------------------7-22

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7-1

Schematic Diagrams

7-1 All block Diagram

(BD-P1620 ONLY)

USB

Ethernet

8MB

SDRAM

Serial Flash

1MB

P/U Deck

Drive I/F

BCM7440C

HDMI Tx

(ADV7510)

BCM7620

SATA I/F

HDMI

MIPS

Graphic

(FE SOC)

A/V

Decoder

1080p

Scaler

Analog Video

YPbPr

Video Amp

CVBS

Digital Audio

(I2S/SPDIF)

I2S

2ch DAC

(CS4353)

Front &

CEC

uCom

(MC80F0448)

SPI

64MB

DDR2

128MB

DDR2

SPDIF

Optic

128MB + 256MB = 384MB

7-2

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64MB

DDR2

128MB

DDR2

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.

2) 2nd : Circuit followings output winding of transformer.

3) f (Frequency) : Switching frequency (T : Switching cycle)

4) Duty : (Ton/T) x 100

1) Prevent residual high voltage at the terminals of

switch during switch of/Suppress noise.

High inverted power occurs at switch of,

because of the 1st winding of transformer :

(V=-L1 xdi/dt. L1 : Leakage Induction)

A very high residual voltage exist on both terminals

of ICIS01 because dt is a very short.

7-2-2 Circuit description [FLY-Back RCC(Ringing Choke Converter)] Control

(a) AC Power Rectiication/Smoothing Terminal

1) A01~04 : Convert AC power to DC (Wave rectiication).

2) CIS01 : Smooth the voltage converted to DC.

3) LIS01, LISO2, CIS04, CIS05 : Noise removal at power input/output.

4) RIS04 : Rush current limit resistance at the momemt of power cord insertion.

· Without PLRU1, the bridge diode might be damaged as the rush current increases.

2) SNUBBER circuit protects ICIS01 from damage

through leakage voltage suppression by RC,

(Charges the leakage voltage to DIS05 and CIS08

and discharges to RIS03, RIS02).

3) CIS07 : For noise removal

Fig. 7-2

1) ICIS01, RIS05, RIS07,RIS08 : ICIS01 driving resistance (ICIS01 works through driving resistance at power

cord in)

2) ICIS01 Vcc : RIS05, RIS07, RIS08

q Use the output of transformer as Vcc,because the current starts to low into transformer while ICIS01 is

active

w Rectify to DIS07 and smooth to CIS09.

e Use the output of transformer as ICIS01 Vcc : he loads are diferent before and ater ICIS01 driving.

(Vcc of ICIS01 decreases below OFF voltage , using only the resistance dut to lode increase ater ICIS01

driving.)

Fig. 7-1

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7-3

Schematic Diagrams

(d) Feedback Control Circuit

Fig. 7-3

1) F/B terminal of PQIZ1 determines output duty cyle.

2) C-E (Collector-Emitter) of PQIZ1 and F/B potential of PQIZ1 are same.

7-2-3 Internal Block Diagram (Internal Block Diagram of S.M.P.S Circuit)

Fig. 7-4

7-4

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Schematic Diagrams

7-3 S.M.P.S (S.M.P.S PCB)

BD01~04

C1S03

IC1S01

F1S01

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7-5

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