Samsung SCX-5312F Service Manual

Also see for Office Master SCX-5312F: Manual Driver manual Driver guide Product guide Manual Del Usuario

Contents

3-35Samsung ElectronicsCIRCUIT DESCRIPTIONRepair Manual3-7-5. RING DETECTION PARTRING SIGNALS from the LINE section (TIP, RING)are further passed through C5, R3, ZD1, and ZD2 and ends up at U9, (PC814). U9 then detects above RING SIGNAL and passes the output to MAIN B’D. The wilre diagram’s C5 is RINGER CAPAC-ITOR and it normally uses 1UF/250V.A R3 limits AC current and controls upper and lower REN meter.3-8 SMPS (Switching Mode Power Supply) Unit.3-8-1 SMPS SPECIFICATIONSThe SMPS (Switching Mode Power Supply) Unit used here is a PWM (Pulse Width Modulation) type power supply unit thatsupplies DC+5V to controller and control panel, and DC+5V, DC+24V and DC+12V to the engine. It also supplies AC powerto fixer heat lamp.No. Output Channel Ch.1 Ch.2 Ch.31 Channel Name +5.1V +24.0V +12.0V2 Rated Output Voltage +5.1V +24.0V +12.0V3 Rate Output Current 2A 2.5A 1.0A4 Maximum Load Current 3A Continued 3.5A Continued 1.0A Continuedand Load Pattern5 Load Change Range 0.5~2.0A 0.3~2.5A 0.2~1.0A6 Rate output voltage +5.1V±5% +24.0V±10% +12V±5%(For rated I/O) (+4.84~+5.35V) (+21.60~+26.40V) (+11.40~+12.60V)7 1) Total Output Voltage Including All Including All Including AllDeviation +5.1V±5% +24.0V±10% +12V±5%(Input, Load, Temp., Aging) (+4.84~+5.35V) (+21.60~+26.40V) (+11.40~+12.60V)2) Dynamic Input Change Including Set Error Including Set Error Including Set Error3) Dynamic Load Change8 Refer to ripple & noise 27) 150mVp-p or less 500mVp-p or less 150mVp-p or less9 Refer to load short and Must not ignite or Output voltage must Must not ignite oroverload protection 23) generate smoke shutdown withing generate smokeRefer to load short and when output shorted the range of when output shortedoverload protection 23) for 5 sec. 3.5A~6.5A for 5 sec.