Samsung SCC-B2300 Service Manual - Page 84

Function E planation

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Circuit perating escription 13- -3 Function E planation AC / C Input / utput Power Circuit 1) Voltage is supplied to the Rectification module by CN406 of the READ BD. 2) Rectification module rectify the voltage signal when the AC power is input, or pass the voltage signal when the DC power is input. • BD01~05, C1, C2, LF1, BD5, : for the safety requirement • F1 : FUSE(Formal Spec : 125V 2.0A) 3) SWITCHING module switches the signal using RCC(RINGING CHOKE CONVERTOR : an isolated oscillation POWER) method at Q1, and supply the signal to TRANSFORMER(PT1-2). This SWITCHING signal goes to PT1-3 and switches Q1 again through Q2. 4) Switching voltage is reduced at PT1-7 and rectified through D11, C10, L10, C22, C23. Output DC12V is used as VIDEO LENS power. 5) Switching voltage is reduced at PT1-6 and rectified through D10,C11,L11,C13. Output DC7V is used as MAIN BD power. 6) DC7V is feedback by PC2, and controls the amplitude of switching signal of Q2 and Q1, so it always becomes DC7V. AC Input / utput Power Circuit 1) Connect the AC230V power source and supply the voltage to the rectification module. 2) Rectification module(DB1) rectifies the input voltage and supply the voltage to the switching module. • BD3, BD99, TNR1, C1, C21, C22, LF1 : for the safety requirement • F1 : FUSE(Formal Spec : 250V 1.6A) 3) SWITCHING module switches the signal using RCC(RINGING CHOKE CONVERTOR : an isolated oscillation POWER) method at Q1, and supply the signal to TRANSFORMER(PT1-3).This SWITCHING signal goes to PT1-4 and switches Q1 again through Q2. 4) Switching voltage is reduced at PT1-6 and rectified through D12,C8,L2,C14. Output DC12V is used as VIDEO LENS power. 5) Switching voltage is reduced at PT1-8 and rectified through D10,C11,L11,C13. Output DC7V is used as MAIN BD power. 6) DC7V is feedback by PC1, and controls the amplitude of switching signal of Q2 and Q1, so it always becomes DC7V. ., , , . 1) IC201 is PWM(Pulse Width Modulation) IC and oscillate by C216, R205, R206. 2) DC+7V is switched by supplying PWM PULSE(IC201-44) to IC202. DC+3.3V is made by rectifying this voltage through L203, C205, C206. Meanwhile, DC+3.3V is a feedback signal to IC201-10,11 through R212,R223,R229. It is always controlled to be DC+3.3V. 3) DC+7V is switched by supplying PWM PULSE(IC201-41) to IC204. DC+5V is made by rectifying this voltage through L208, C229, C230. Meanwhile, DC+5V is feedback to IC201-22,23 through R218,R219. It is always controlled to be DC+5V. The circuit which is connected to IC201-25 by R220, R221 is the power protection circuit against +5V voltage short. 4) Switching DC+7V by supplying PWM PULSE(IC201-35) to Q201 makes High Voltage Pulse at L210. Rectifying this pulse by D201,C234,C235,L202 makes DC+15V. Meanwhile, DC+15V is feedback to IC201-27,28 through R225,R227. It is always controlled to be DC+15V. The circuit which is connected to IC201-30 by R222, R224 is the power protection circuit against +15V voltage short. Rectify this signal by D202,C238 again, and supply it to D203 ANODE through R228 makes -6.8V. +15V and 6.8V is used for CCD. Samsung Electronics

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Circuit
perating
escription
Samsung Electronics
13- -3 Function E planation
AC
/
C
Input
/
utput Power Cir
cuit
1)
Voltage is supplied to the Rectification module by CN406 of the READ BD.
2)
Rectification module rectify the voltage signal when the AC power is input, or pass the voltage signal when
the DC power is input.
•
BD01~05, C1, C2, LF1, BD5, : for the safety requirement
•
F1 : FUSE(Formal Spec : 125V 2.0A)
3)
SWITCHING module switches the signal using RCC(RINGING CHOKE CONVERTOR : an isolated
oscillation POWER) method at Q1, and supply the
signal to TRANSFORMER(PT1-2). This SWITCHING
signal goes to PT1-3 and switches Q1 again through Q2.
4)
Switching voltage is reduced at PT1-7 and rectified through D11, C10, L10, C22, C23. Output DC12V is used
as VIDEO LENS power.
5)
Switching voltage is reduced at PT1-6 and rectified through D10,C11,L11,C13. Output DC7V is used as MAIN
BD power.
6)
DC7V is feedback by PC2, and controls the amplitude of switching signal of Q2 and Q1, so it always becomes
DC7V.
AC
Input
/
utput Power Cir
cuit
1)
Connect the AC230V power source and supply the voltage to the rectification module.
2)
Rectification module(DB1) rectifies the input voltage and supply the voltage to the switching module.
•
BD3, BD99, TNR1, C1, C21, C22, LF1 : for the safety requirement
•
F1 : FUSE(Formal Spec : 250V 1.6A)
3)
SWITCHING module switches the signal using RCC(RINGING CHOKE CONVERTOR : an isolated
oscillation POWER) method at Q1, and supply the signal to TRANSFORMER(PT1-3).This SWITCHING signal
goes to PT1-4 and switches Q1 again through Q2.
4)
Switching voltage is reduced at PT1-6 and rectified through D12,C8,L2,C14. Output DC12V is used as VIDEO
LENS power.
5)
Switching voltage is reduced at PT1-8 and rectified through D10,C11,L11,C13. Output DC7V is used as MAIN
BD power.
6)
DC7V is feedback by PC1, and controls the amplitude of switching signal of Q2 and Q1, so it always becomes
DC7V.
.
,
,
,
.
1)
IC201 is PWM(Pulse Width Modulation) IC and oscillate by C216, R205, R206.
2)
DC+7V is switched by supplying PWM PULSE(IC201-44) to IC202. DC+3.3V is made by rectifying this voltage
through L203, C205, C206.
Meanwhile, DC+3.3V is a feedback signal to IC201-10,11 through R212,R223,R229.
It is always controlled to
be DC+3.3V.
3)
DC+7V is switched by supplying PWM PULSE(IC201-41) to IC204.
DC+5V is made by rectifying this voltage
through L208, C229, C230.
Meanwhile, DC+5V is feedback to IC201-22,23 through R218,R219. It is always controlled to be DC+5V. The
circuit which is connected to IC201-25 by R220, R221 is the power protection circuit against +5V voltage short.
4)
Switching DC+7V by supplying PWM PULSE(IC201-35) to Q201 makes High Voltage Pulse at L210.
Rectifying this pulse by D201,C234,C235,L202 makes DC+15V. Meanwhile, DC+15V is feedback to IC201-27,28
through R225,R227. It is always controlled to be DC+15V. The circuit which is connected to IC201-30 by R222,
R224 is the power protection circuit against +15V voltage short.
Rectify this signal by D202,C238 again, and supply it to D203 ANODE through R228 makes -6.8V. +15V and -
6.8V is used for CCD.