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Faultfinding Guide 8.2 Circuit description of the current mode power supply 8.2.1 Blockdiagram Rectifier Lightning Protection CDR779 8. GB 59 6210 5131 +5V EMI FILTER MAINS 2 2643 6230 Start Circuit Comp Overvoltage Protection +12V 5 7 Vcc 6240 9 v 2.5V -8V t CLOCK Error Amplifier + - PWM Verror comparator + 6250 7125 S R Q latch VFTD Output 6220 Isense Vfb VDC2 Vsense Rsense CONTROL VDC1 +12V +5V Vcc 7131 0V 7201 REGULATION CL 06532151_018.eps 271100 Figure 8-10 8.2.2 Function description 7 VI MOSFET 7125 is used as a power switch controlled by the controller IC 7110. When the switch is closed, energy is transferred from mains to the transformer. This energy is supplied to the load when the switch is opened. Through control of the switched-on time, the energy transferred in each cycle is regulated so that the output voltages are independent of load or input voltage variations. The controlling device UC3842 is an integrated pulse width modulator. A clock signal initiates power pulses at a fixed frequency. The termination of each output pulse occurs when a feedback signal of the inductor current reaches a threshold set by the error signal. In this way the error signal actually controls the peak inductor current on cycle-by cycle basis. 8.2.3 6V + 16V + 5 GND 2.5V 8 Vref BIAS 4 6 Rt/ct 1 OSC 2.5V OUTPUT S ERROR AMP 2 Vfb + I SENSE COMP 2R R 1V + R 1 COMP LATCH 3 I sense Figure B : Blockdiagram UC3842 Description of UC3842 The input voltage Vcc(pin 7) is monitored by a comparator with hysteresis, enabling the circuit at 16V and disabling the circuit below 10V. The error amplifier compares a voltage Vfb(pin 2) related to the output voltage of the power supply, with an internal 2.5V reference. The current sense comparator compares the output of the error amplifier with the switch current Isense(pin 3) of the power supply. The output of the current sense comparator resets a latch, which is set every cycle by the oscillator. The output stage is a totem pole, capable of driving a MOSFET directly 5V REF S/R - CL 06532151_019.eps 271100 Figure 8-11 8.2.4 Start up sequence t1: Charging the capacitor at Vcc C2129 wiil be charged via R3123 and R3134, C2133 and C2111 via R3129. The output is switched off During t1. t2: Charging of output capacitors When the input voltage of the IC exceeds 14,5V, the circuit is enabled and starts to produce output pulses. The current consumption of the circuit increases to about 17mA, depending on the external loads of the IC. At first, the GB 60 8. Faultfinding Guide CDR779 capacitor at the Vcc pin will discharge because the primairy auxiliary voltage, coming from winding7-9 is below the Vcc voltage. At some moment during t2, the primary auxiliary voltages reaches the same level as Vcc. This primary auxiliary voltage now determines the Vcc voltage t3: regulation The output voltage of the power supply is in regulation t4: overload When the output is shortened, the supply voltage of the circuit will decrease and after some time drop below the lower threshold voltage. At that moment, the output will be disabled and the process of charging the Vcc capacitor starts again. If the output is still shorted at the next t2 phase, the complete start-and stop sequence will repeat. The power supply comes in a hiccup mode. becomes reversed. This results in a current flow through the tranformer’s secondary winding via the diodes, electrolytic capacitors and the load. This current is also ramp shaped but decreasing. TimeDEAD phase : when the stored energy has been supplied to the load, the voltage from the secondary windings falls below the output voltage(held constant by the electrolytic capacitors) plus the threshold voltage of the diodes. The current in the secondary winding stops flowing. At this point, the drain voltage of the MOSFET is not yet zero because C2609 between drain and source contains a certain charge. This charge will start a sine-shaped ringing together with the transformer’s self-induction. The oscillator will start a next cyclus which consists of the described three phases. The time of the different phases depends on the mains voltage and the load. TimeDEAD is maximum at an input of 400VDC and minimum load, it will be zero at an input of 100VDC and overload. 16V Vcc 12V V2 Vosc 10V Vc2134 V1 0V 0 Vcomp 20mA Vsense Icc 1mA Vgate OUTPUT Vdrain short Idrain Vo 0 t1 t2 t3 t4 Idiodes Figure C : Start-up sequence CL 06532151_020.eps 271100 Figure 8-12 8.2.5 Regulation Figure 4 shows the most relevant signals during the regulation phase of the power supply. The oscillator voltage ramps up and down between V1 and V2. The voltage at the current sense terminal is compared every cycle with the output of the error amplifier Vcomp. The output is switched off when the current sense level exceeds the level at the output of the error amplifier. TimeON phase : A drain current will flow from the positive supply at pin 1 through the transformer’s primary winding, the MOSFET and Rsense to ground. As the positive voltage at pin 1 of the transformer is constant, the current will increase linearly and create a ramp dependent on the mains voltage and the inductance of the primary winding. A certain amount of energy is stored in the transformer in the form of a magnetic field. The polarity of the voltages at the secundary windings is such that the diodes are non-conducting. TimeDIODE phase : When the MOSFET is switched off, energy is no longer supplied to the tranformer. The inductance of the tranformer now tries to maintain the current which has been flowing through it at a constant level. The polarity of the voltage from the transformer therefore Ton Tdiode Tdead CL 06532151_021.eps 271100 Figure 8-13 Faultfinding Guide 8.2.6 Oscillograms 8.2.7 Oscillograms CH1 2 CH2 CH3 2 V~ ALT MTB5.00us- 0.90dv ch1- PM3394B ch1 1 T 3 GB 61 Circuit description Input circuit The input circuit consists of a lightning protection circuit and an EMI filter. The lightning protection comprises R3120, gasarrestor 1125 and R3124. The EMI filter is formed by C2120, L5120, C2125 and R3124. It prevents inflow of noise into/from the mains. Start circuit and Vcc supply This circuit is formed by R3123, R3134, C2129, D6129, R3129, R3111, C2133 and C2111. When the power plug is connected to the mains voltage, the stabilised voltage over D6129(24V) will charge C2133 via R3129. When the voltage reaches 14,5V across C2111, the control circuit of IC7110 is turned on and the regulation starts. During regulation, Vcc of IC7110 will be supplied by the rectified voltage from winding 7-9 via L5132, D6132 and C2133. 2 ch1 : Drain voltage ch2 : Drain current ch3 : Gate voltage PM3394B 8. Primary rectifier/smoothing circuit The AC input is rectified by rectifier bridge 6102 and smoothed into C2121. The voltage over C2121 is approximately 300V. It can vary from 100V to 390V. ch3 ch2 CDR779 CH1 1 CH3 50mV~ ALT MTB5.00us- 0.90dv ch1- Control circuit The control circuit exists of IC7110, C2102, C2104, C2107, C2109, C2110, R3102, R3103, R3104, R3107, R3108, R3109 and R3110. C2102 and R3110 define the frequency of the oscillator. ch1 Power switch circuit This circuit comprises MOSFET 7125, Rsense 3126, 3127 and 3128, R3125, C2127, L5125, R3112 and R3113. R3125 is a pull-down resistor to remove static charges from the gate of the MOSFET. 1 ch3 T Regulation circuit The regulation circuit comprises opto-coupler 7200 which isolates the error signal from the control IC on the primary side and a reference component 7201. The TL431(7201) can be represented by two components: • a very stable and accurate reference diode • a high gain amplifier 3 ch1 : Drain voltage ch2 : Oscillator voltage PM3394B K CH1 1 CH3 20mV~ ALT MTB5.00us- 0.90dv ch1- R ch1 2.5V 1 ch3 T A CL 06532151_023.eps 271100 Figure 8-15 3 ch1 : Drain voltage ch3 : Sense voltage Figure 8-14 CL 06532151_022.eps 301100 TL431 will conduct from cathode to anode when the reference is higher than the internal reference voltage of about 2.5V. If the reference voltage is lower, the cathode current is almost zero. The cathode current flows through the LED of the optocoupler. The collector current of the opto-coupler flows through R3106, producing an error voltage, connected to voltage feedback pin 14 of IC7110. Overvoltage protection circuit This circuit consist of D6114, C2114, R3115and R3116. GB 62 8. Faultfinding Guide CDR779 Secondary rectifier/smoothing circuit There are 5 rectifier/smoothing circuits on the secondary side. Each voltage depends on the number of windings of the transformer. The -8V supply is regulated by voltage regulator 7249. When the regulation circuit is interrupted due to an error in the control loop, the regulated output voltage will increase (overvoltage). This overvoltage is sensed on the primary winding 7-9. When an overvoltage longer than 2.0µs is detected, the output is disabled until Vcc is removed and then re-applied. The power supply will come in a hiccup mode as long as the error in the control loop is present. 8.2.8 On/off circuit In off mode pin 1 and pin 2 of connector 0206 are connected. The high voltage (-8V, +12V) over opto coupler 7200 forces this one to conduct . IC 7110 is switched off Troubleshooting PSU CDR3-ECO Faultfinding diagram TROUBLE SHOOTING POWER SUPPLY OK Check DC voltages +5V +12V -8V VFTD(-38V) VDC1-VDC2(3V8) power supply OK NOK Disconnect the power supply from the MAIN Board Connect a dummy load resistor 6,8 ohm 10W (min 5W) on the 5V and OK Check DC voltages +5V +12V -8V VFTD(-38V) VDC1-VDC2(3V8) power supply OK check - main board - front board - modem board NOK OK Check the +5V check the fault voltage path NOK check 6210-2210-2253-5210 OK connect the mains inlet to a mains isolated variac turn input voltage up and check across C2121 the voltage this voltage should be +/- 1,41 x Vin ac NOK check the functionality of the following components: 1120-2121-2125-2126-2127-6102-7125 YES check the load on the secundairy output check overload circuit 6141-7141-7150 OK is power supply ticking? NO check Vcc on pin 7 IC7110 Vcc = 12V...... 16V NOK check 2121-2133-2134-3123-3134-6130-6132 replace 7110 NOK check 2102 - 3102 replace 7110 OK check oscillator on pin 4 IC7110 is the osc +- 30kHz working ? OK check the voltage on the source of 7125 Vsource = 1,3V ? YES check 3125-3126-3127-3128 replace 7125 NO (Vsource = +- 0.8V) Disconnect diode 6150 start variac from 0V and turn-up slowly measure the 5V output If the 5V becoming higher than 5V, the regulator circuit are damaged 5V NOK check:3201-3202-3203-3204-3205 3206-3207-3208-7131-7201 replace 7110 check circuit around Ic7110 5V OK After the power repaired check the 3,3V Figure 8-16 CL 06532151_024.eps 271100 Block diagrams, Circuit diagrams and PWB’s CDR779 5. GB 36 PSU CDR3-ECU 6 2131 6210 2n2 SB360 2253 2213 2m2 should be YK type 5 3203 100n 2111 100n 2161 1n8 2102 330p 2109 F219 10u 3236 2252 12K 5K6 3232 3229 3233 D 3220 100u 2222 3222 1K2 UDZ-2.7B 1K2 3223 390R VDC2 F212 VDC1 E 3202 2202 3204 22n 10K 3K3 10R 100n F211 C F209 10u 3221 330u 2220 3201 2201 VFTD F210 5220 F208 Euro 2121 3122 5120 5121 9122 0101 47u Reserved UF1922P Reserved Jumper Unpolarized WW 100u 2R7 Reserved CU15D3 Reserved Unpolarized USA 220u Reserved Reserved CU15D3 Jumper Polarized F 3 -8Vr 1K G 100R 22K F122 3109 1K 1 3102 1K 3106 4n7 2106 1K5 3150 100n 2150 6150 UDZ-4.7B 47n 2221 33R 3113 270R F216 6 B 11 +5Vr 3205 GND 7131 CQY80NG 7 220R RtCt F215 8 3K3 VCC Isense OUTPUT 7254 BC847B F207 10u 4u7 3206 Vfb F110 3K3 68R 7253 BC327-25 5226 +12Vr 3207 Vref BYD33D 4u7 18 3208 4 COMP 5225 6202 BYD33D 6220 100u 10K 2133 16 7 470R 3 15K 3105 56K 3151 F 6132 3234 68R 3224 100u 3225 2250 3128 1R 3127 1R 3126 7110 UC3842A 1SS355 3103 6133 1n 2104 15K 3104 100n 2142 2u2 2141 10K 3141 10R 3142 7150 BC847B 3110 100u 2134 68R 3111 BZX84-C24 4u7 6129 2129 1SS355 22R UDZ-20B 6141 3112 9 2 10n 22u 2234 7251 BC337-40 BYD33J 68u 6130 5250 -8V 10u 470R OUT 10 F214 UDZ-22B 1 9 3235 6201 220u 3 GND 8 -8V F213 3K3 6250 2130 5130 BC857B 7141 7 +12V 1R5 5255 1u 1 6 +5V F222 7252 BC857B 14 T 5 +5V 6 F221 +12V 2u2 5240 F205 F206 100u IN 2240 2231 1m 2 BYD33D 13 2242 470p 6240 2 7249 L7908 -8Vr 11 2127 10K 3125 3230 2230 15 OUT GND 2232 IN A 4 5 F204 5230 F203 3 2243 100u 2121 1N4006 1N4006 6106 6107 1 BYW98-200 83R E 3 VDC1 4 +5V EH-B 2 VFTD F230 10 F121 +12V 7260 6230 F111 7125 STP3NB60FP 5125 0125 HEATSINK 10K 1 VDC2 F220 C D 0205 EH-B 3 +12Vr 5 18K +5V 17 2 3129 0207 2 2260 2 F112 F125 12 1 F201 F202 F223 F224 5210 5131 CT283D3 F106 F108 F109 11 -8V B 18K +5Vr 6u8 F107 3123 10 3 T2.0A H 250V 3134 9 0208 S1NB80 6102 8 0260 HEATSINK F105 4 7 1K 6101 1 2n2 2125 2126 4 3 3117 F104 51214 5120 3 680K 2119 V F102 1120 F103 220n 2 2120 3120 1 33n UF1922P4 1 2 2R7 3119 0101 HCS0528 V 2322593 3122 2128 1 F100 F101 3124 470R CU15D3 A 6100 9122 BZX79-C15 POWER SUPPLY UNIT CDR3-ECO 5 2210 4 BZX79-C15 3 2n2 2 2 1 F217 F218 0206 1 7201 TL431CLP 2 G EH-B 2 * : Reserved Item Number H H CL 06532151_013.eps 241100 1 2 3 4 5 6 7 8 9 10 11 12 0101 A2 0125 B5 0205 A12 0206 G7 0207 A11 0208 A10 0260 A7 1120 B2 2102 G4 2104 E4 2106 F3 2109 G4 2111 G5 2119 A3 2120 A3 2121 B6 2125 A5 2126 B5 2127 C6 2128 A5 2129 D3 2130 D6 2131 A7 2133 D5 2134 D5 2141 E3 2142 E4 2150 F2 2161 G5 2201 E7 2202 F7 2210 A8 2213 A9 2220 D8 2221 E7 2222 D10 2230 B8 2231 B9 2232 B9 2234 B9 2240 C8 2242 C9 2243 C9 2250 D8 2252 C11 2253 A8 2260 A10 3102 F5 3103 E5 3104 E4 3105 F4 3106 F4 3109 G4 3110 D5 3111 D4 3112 D6 3113 E5 3117 A3 3119 B3 3120 A2 3122 A4 3123 B4 3124 A4 3125 C5 3126 C6 3127 C6 3128 C6 3129 D4 3134 C4 3141 E3 3142 E2 3150 F2 3151 F3 3201 E7 3202 F8 3203 F7 3204 F8 3205 F8 3206 G8 3207 F7 3208 F7 3220 D11 3221 E10 3222 D10 3223 E9 3224 D9 3225 C9 3229 C11 3230 B8 3232 C11 3233 D11 3234 D10 3235 B10 3236 C11 5120 A4 5121 A4 5125 B6 5130 D6 5131 A6 5210 A9 5220 D11 5225 D9 5226 E9 5230 B10 5240 C9 5250 C11 5255 C7 6100 A4 6101 A5 6102 A5 6106 B4 6107 C4 6129 D4 6130 D5 6132 D6 6133 E5 6141 E2 6150 F3 6201 C10 6202 D10 6210 A8 6220 D8 6230 B8 6240 C8 6250 C8 7110 E5 7125 B6 7131 F6 7141 F3 7150 F3 7201 G7 7249 B8 7251 C10 7252 C10 7253 D9 7254 D9 7260 B9 9122 A4 F100 A2 F101 A2 F102 B2 F103 B2 F104 A5 F105 A6 F106 A6 F107 B6 F108 B4 F109 D3 F110 E5 F111 B6 F112 B6 F121 D2 F122 F3 F125 D4 F201 A9 F202 A9 F203 B10 F204 B10 F205 C9 F206 C9 F207 C11 F208 C12 F209 D11 F210 D11 F211 E10 F212 E11 F213 B12 F214 B12 F215 E7 F216 F7 F217 G7 F218 G7 F219 G7 F220 B11 F221 B11 F222 B11 F223 A9 F224 A10 F230 A10 Block diagrams, Circuit diagrams and PWB’s CDR779 5. GB 37 Layout PSU CDR3-ECO POWER SUPPLY UNIT CDR3-ECO - TOP VIEW POWER SUPPLY UNIT CDR3-ECO - BOTTOM VIEW CL 06532151_014.eps 241100 Spare parts list 3119 Headphone board g 2100 2101 2102 2103 2104 2105 4822 126 14585 4822 124 81151 4822 126 14585 4822 124 81151 5322 126 10511 5322 126 10511 100nF 10% 50V 22µF 50V 100nF 10% 50V 22µF 50V 1nF 5% 50V 1nF 5% 50V 5322 117 11726 5322 117 11726 4822 051 20008 4822 051 20008 4822 117 11503 4822 117 11503 4822 051 20122 4822 051 20122 10Ω 5% 10Ω 5% 0Ω jumper . (0805) 0Ω jumper . (0805) 220Ω 1% 0.1W 220Ω 1% 0.1W 1k2 5% 0.1W 1k2 5% 0.1W f 3100 3101 3102 3104 3106 3107 3108 3109 ce 7102 7103 7104 4822 209 82362 NJM4556D 4822 130 42615 BC817-40 4822 130 42615 BC817-40 PSU CDR3 ECO Miscellaneous 0025 0060 0101h 1120h 1121 4822 492 63524 4822 492 63524 4822 265 31015 4822 070 32002 4822 265 11253 FIX. TRANSISTOR FIX. TRANSISTOR HSC0528 218002.(2A) FUSE HOLDER 2P 2102 2104 2106 2109 2111 2120h 2121 2238 861 15182 5322 122 31647 5322 126 10223 5322 122 31863 4822 126 14585 4822 121 10697 8222 675 05480 2127 2128 2129 2131h 2133 2134 2141 2142 2150 2161 2201 2202 2210 4822 122 50116 4822 121 70141 4822 124 40769 4822 126 14497 4822 124 42084 4822 124 42084 4822 124 22652 4822 126 14585 4822 126 14585 4822 126 14585 4822 126 14585 5322 122 32654 2020 012 93728 2213 2220 2221 2222 2230 2234 2240 2242 2250 2252 2253 2260 4822 124 41584 4822 124 40849 4822 126 13751 4822 124 42234 4822 124 81144 4822 124 81151 4822 124 40196 4822 124 41584 4822 124 40255 4822 124 40248 2020 558 90449 4822 122 33177 50V 1N8 PM5 R 1nF 10% 63V 4.7nF 10% 63V 63V 330pF PM5 100nF 10% 50V 220nF 20% 275V EL 47µF /400V YK KC RUBYCOnF 470pF 10% 1KV 33nF 5% 400V 4.7µF 20% 100V 2.2nF 20% 250V 100µF 20% 35V 100µF 20% 35V 2.2µF 20% 50V 100nF 10% 50V 100nF 10% 50V 100nF 10% 50V 100nF 10% 50V 63V 22nF PM10 R EL YK 10V S 2200µF PM20 B 100µF 20% 10V 330µF 20% 16V 47nF 10% 63V 100µF 20% 6.3V 1000µF 16V 22µF 50V 220µF 20% 16V 100µF 20% 10V 100µF 20% 63V 10µF 20% 63V DC DE-F 1KV 4N7 P8020 A 10nF 20% 50V g f 3102 3103 3104 3105 3106 3109 3110 3111 3112 3113 3117h 4822 117 10354 4822 051 20339 4822 116 83933 4822 116 83933 4822 051 10102 4822 051 10102 4822 050 21003 4822 116 52199 4822 053 11229 4822 051 10102 4822 053 21684 22k 1% 0.1W 33Ω 5% 0.1W 15k 1% 0.1W 15k 1% 0.1W 1k 2% 0.25W 1k 2% 0.25W 10k 1% 0.6W 68Ω 5% 0.5W 22Ω 5% 2W 1k 2% 0.25W 680k 5% 0.5W 3123 3124 3125 3126 3127 3128 3129 3134 3141 3142 3150 3151 3201 3202 3203 3204 3205 3206 3207 3208 3221 3222 3223 3224 3225 3229 3230 3232 3233 3234 3235 4xxx 4xxx 2322 595 90023 VDR DC 1M A/423V S MAX 800V B 4822 050 21803 18k 1% 0.6W 4822 117 12181 470Ω 20% 0.5W 4822 117 10833 10k 1% 0.1W 4822 116 80176 1Ω 5% 0.5W 4822 116 80176 1Ω 5% 0.5W 4822 116 80676 1Ω5 5% 0.5W 4822 117 10833 10k 1% 0.1W 4822 050 21803 18k 1% 0.6W 4822 117 10833 10k 1% 0.1W 4822 051 20109 10Ω 5% 0.1W 4822 117 11139 1k5 1% 0.1W 4822 117 11148 56k 1% 0.1W 4822 116 52176 10Ω 5% 0.5W 4822 050 13302 3k3 1% 0.4W 4822 116 52175 100Ω 5% 0.5W 4822 117 10833 10k 1% 0.1W 4822 117 11503 220Ω 1% 0.1W 4822 051 20332 3k3 5% 0.1W 4822 051 10102 1k 2% 0.25W 4822 116 83883 470Ω 5% 0.5W 4822 051 20122 1k2 5% 0.1W 4822 051 20122 1k2 5% 0.1W 4822 117 11596 390Ω 1% 0.1W 4822 116 52199 68Ω 5% 0.5W 4822 116 52199 68Ω 5% 0.5W 4822 117 13085 5k6 1% RC12H 0.1W 0805 4822 050 21002 1k 1% 0.6W 4822 117 11383 12k 1% 0.1W 4822 051 20471 470Ω 5% 0.1W 4822 051 20332 3k3 5% 0.1W 4822 116 52269 3k3 5% 0.5W 4822 051 10008 0Ω 5% 0.25W (1206) 4822 051 20008 0Ω 5% 0.25W (0805) b 5120 5125 5130 5131h 4822 157 11846 4822 157 11411 4822 157 51312 3128 138 38950 5210 5220 4822 157 11722 4822 157 51462 5225 5226 5230 5240 4822 157 53139 4822 157 53139 4822 157 50963 4822 157 51462 5250 4822 157 51462 5255 4822 157 51195 d 6100 6101 6102 6106 6107 6129 6130 6132 6133 6141 6150 6201 6202 4822 130 34281 4822 130 34281 4822 130 83707 4822 130 31603 4822 130 31603 5322 130 80122 4822 130 83649 4822 130 42488 4822 130 83649 4822 130 10656 4822 130 11148 9322 107 43685 9322 102 64685 6210 6220 6230 6240 6250 4822 130 83865 4822 130 42488 4822 130 11415 4822 130 42606 4822 130 32896 ce 7110 7125 7131h 7141 7150 7201 7249 7251 7252 7253 7254 7260 9322 145 88682 4822 130 11417 4822 130 91451 4822 130 60373 5322 130 60159 4822 209 81397 4822 209 82112 4822 130 41344 4822 130 60373 4822 130 41246 5322 130 60159 8222 675 06290 CDR779 10. GB 77 CD MAINBOARD Miscellaneous 1000 1004 1006 1205 1206 1207 1208 1209 1210 2422 025 11704 CON BM H 16P F 1.00 FFC 0.3 R 2422 543 00896 RES XTL SM 8M4672 30P CX-5F R 4822 267 51454 CONN. 11P FEMALE 5322 242 73686 CST12,00MTW-TF01 4822 252 51173 19398E1(1,000A) 4822 252 51173 19398E1(1,000A) 4822 267 60409 CONN 22P FEMALE 4822 265 30987 BMT 7SR>CBL0,3-1,25 2422 025 11704 CON BM H 16P F 1.00 FFC 0.3 R g 2100 2102 2103 2104 2105 2106 2107 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 µH 1922P4 2120 100mH z 2121 68µH 2122 SM TRANSFORMER 2123 CT283D3 2124 6.8µH 20% 7.7X9.5 2125 10µH 10% 4X9.8MM 2126 LAL04T100K 2127 4.7µH 2128 4.7µH 2130 2.2µH 2131 10µH 10% 4X9.8MM 2132 LAL04T100K 2133 10µH 10% 4X9.8MM 2134 LAL04T100K 1 µH 20% 4X9.8MM AXIAL 2135 2137 2138 2139 2140 BZX79-B15 2141 BZX79-B15 2142 SINB80 2143 1N4006 2145 1N4006 2146 BZX84-C24 2147 1SS355 2148 BYD33D 2149 1SS355 2150 UDZ20B 2151 UDZ4.7B 2152 UDZ22B 2153 DIO REG SM UDZ2.7B 2154 (RHM0) R 2155 SB360 2156 BYD33D 2157 BYV28-400/20 2158 BYD33J 2159 BYD33M 2160 2161 2162 2163 2164 UC3842A 2165 STP3NB60FP 2166 CQY80NG 2167 BC856B 2168 BC846B 2169 TL431CLPST 2170 MC7908CT 2171 BC337-40 2172 BC856B 2173 BC327-25 2174 BC846B VOLT.REG.BA12T ROHM 2175 2176 4822 126 14585 4822 126 14585 5322 122 31647 4822 126 14585 4822 124 81286 4822 126 14585 4822 124 81286 5322 122 32654 4822 126 14585 4822 126 14585 4822 126 14585 4822 126 14585 4822 126 14585 4822 126 14585 4822 124 41796 4822 126 13561 4822 126 14585 4822 126 14585 4822 124 41796 4822 126 14585 4822 126 12104 5322 122 31863 4822 126 14585 4822 124 81286 5322 122 34098 5322 122 31863 4822 124 80483 4822 126 14305 4822 126 14585 4822 124 80483 4822 126 13482 4822 126 14305 4822 124 41796 4822 126 14494 4822 126 14494 4822 126 14305 4822 126 14508 4822 126 14238 5322 122 32654 4822 126 14241 4822 126 13692 4822 126 14247 4822 126 13482 4822 124 22726 3198 016 36810 4822 126 12105 5322 124 11919 4822 126 14305 4822 122 33777 4822 124 81286 4822 126 14585 5322 124 11919 4822 126 14305 4822 122 33777 3198 017 34730 4822 126 14494 5322 124 11919 4822 122 31765 4822 126 14549 4822 126 14508 4822 122 33777 3198 017 34730 4822 126 14585 4822 126 13883 5322 126 10794 5322 126 10794 5322 126 10794 5322 126 10794 5322 126 10794 4822 126 14494 4822 124 81286 4822 122 33777 100nF 10% 50V 100nF 10% 50V 1nF 10% 63V 100nF 10% 50V 47µF 20% 16V 100nF 10% 50V 47µF 20% 16V 63V 22nF PM10 R 100nF 10% 50V 100nF 10% 50V 100nF 10% 50V 100nF 10% 50V 100nF 10% 50V 100nF 10% 50V 22µF 20% 16V 220nF 10% 16V 100nF 10% 50V 100nF 10% 50V 22µF 20% 16V 100nF 10% 50V 12nF 5% 50V 63V 330pF PM5 100nF 10% 50V 47µF 20% 16V 10nF 10% 63V 63V 330pF PM5 47µF 20% 6.3V 100nF 10% 16V 0603 100nF 10% 50V 47µF 20% 6.3V 470nF 80/20% 16V 100nF 10% 16V 0603 22µF 20% 16V 22nF 10% 25V 0603 22nF 10% 25V 0603 100nF 10% 16V 0603 180pF 5% 50V 0603 0603 50V 2N2 COL R 63V 22nF PM10 R 0603 50V 330P COL R 47pF 1% 63V 0603 50V 1N5 COL R 470nF 80/20% 16V 4.7µF 35V 0603 25V 680P COL R 50V 33nF PM5 47µF 20% 6.3V 100nF 10% 16V 0603 47pF 5% 63V 47µF 20% 16V 100nF 10% 50V 47µF 20% 6.3V 100nF 10% 16V 0603 47pF 5% 63V 0603 16V 47nF COL 22nF 10% 25V 0603 47µF 20% 6.3V 100pF 2% 63V 33nF 16V O6O3 180pF 5% 50V 0603 47pF 5% 63V 0603 16V 47nF COL 100nF 10% 50V 220pF 5% 50V 220pF 5% 63V 220pF 5% 63V 220pF 5% 63V 220pF 5% 63V 220pF 5% 63V 22nF 10% 25V 0603 47µF 20% 16V 47pF 5% 63V Electrical diagrams and PWB’s CDR 3rd gen. 7. GB 40 CDR MAIN BOARD - CIRCUIT DIAGRAM 7 : POWER PART TESTPOINTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 5556 P12VKILL +5VA F800 F801 F803 47u 1 3533 D3V3 100n 2537 GND 2504 F802 2 OUT 2535 2536 IN 100n 3 1A MP A 100K 3570 2 7535 LD1117 100R A 1542 11.8V BAS216 220u 2568 100u 6553 BLM21 3 11.8V BC857B 7560 BC857B 7561 14 F804 KILL 1543 D5VS F807 3531 3560 -8VA C 100K KILL_OUT 5555 1A MP BLM21 P12V 220u F825 7549 BC847B -8VA 12VPWR 12VCP 13 F826 A-8V F824 BLM21 2558 100u 2561 100n 10 F830 12 5551 7556 MC79L05ABD 2 3552 3 47K 6 IN OUT 4 3 F812 8 7521-A MC34072 1 4 2556 5 G 11 7526 BC847B 22u F491 3546 F846 F836 100R 2 12VCP 2551 F838 L-5V GND 11.8V 100n G 5V 10V 5.2V 2562 7522 BC857B 5.2V F NC 8 7 3545 6R8 1 F829 2557 12R 100n F843 3544 47K 5V 3567 22K L12V -8VA BLM21 100n 2575 12R 3541 E F832 +9SRVPWR OUT 2574 10K 11V GND F841 47u 3557 F831 7528 BC847B 3542 100K +5VA 1K2 F842 7525 BC857B 100K F818 10n F845 9 7558 L78M09 2555 100n 2577 5709 3555 0.7V 2n2 2502 GND_CASE 3566 12VPWR IN BLM21 GND_CASE F840 F844 10K 5503 3556 BLM21 2n2 2501 11 BLM21 POWER_UP 3540 10K 8 BCP69 7527 3554 5502 5501 100n F839 14 F828 12VPWR 7 GNDA 9 F827 2565 100n 2571 5542 BLM21 GND_CASE 10 D F821 100n 2572 5500 2n2 2500 8 1541 +12VA F822 F823 7 5541 BLM21 2547 VDC1 100u VFTD F817 2548 F816 3 100n 2 6 EH-B 3532 6 2541 F815 5 E 7562 BC847B 7563 BC847B 7524 BC847B VDC2 1 4 F820 FROM PSU 2546 BLM21 F811 P12VKILL 1500 D 3539 10K F L5V 0.7V 5K6 F813 F814 3538 5 F810 5546 5K6 7520 STD17N05 2 1 47u 3536 100K 10K 3537 0.7V F809 B F806 7523 BC847B C POWER_UP F808 4 -8V during normal operation 100K P12V 3 TO DISPLAY BOARD 3559 47u 2543 1A MP 100n 2544 D5V 5K6 F805 3562 5544 5K6 5543 B H F496 23.2V 6501 BAV99 2563 100n 100n 2550 2553 100n 100n 6500 BAV70W 27.5V F499 F492 2507 10u F819 P12V 5554 F498 3550 47u 100R FS30V F497 27.4V 2505 10u 2506 33n H 3547 12VCP 15K 12VCP 3548 47K 2552 1n 5 5V I 8 F835 3553 7521-B MC34072 7 4.5V 3549 F834 100R 6 3551 3K3 4 4.6V 100R 7548 BC847B 2508 F494 2509 F493 F837 5.2V 100n F495 17.8V 6502 BZX284-C22 100n 7529 BC857B +5VA {POWER_UP,KILL_OUT} 6554 BAV99 4.6V I PB CDRW MAIN-4228-CDR99 3104 123 4228 CL06532018_082.eps 010300 1500 D1 1541 D4 1542 A4 1543 B4 2500 E2 2501 F1 2502 F2 2504 A11 2505 H12 2506 H12 2507 H9 2508 I8 2509 I8 2535 B5 2536 B4 2537 B5 2541 D5 2543 B4 2544 B4 2546 C7 2547 F6 2548 D5 2550 H8 2551 G4 2552 H3 2553 H8 2555 F12 2556 G13 2557 F14 2558 F12 2561 F11 2562 H8 2563 H8 2565 D6 2568 A5 2571 D3 2572 E2 2574 E8 2575 E9 2577 F2 3531 C12 3532 C12 3533 A13 3536 C6 3537 C6 3538 C4 3539 D5 3540 E10 3541 F6 3542 E6 3544 F3 3545 G4 3546 G4 3547 H5 3548 H6 3549 I7 3550 H10 3551 I6 3552 F5 3553 I6 3554 E5 3555 E5 3556 E4 3557 F4 3559 B12 3560 B14 3562 B13 3566 E10 3567 E11 3570 A12 5500 D2 5501 E2 5502 E2 5503 E2 5541 D4 5542 D4 5543 B3 5544 B3 5546 C7 5551 F11 5554 H10 5555 D6 5556 A5 5709 F2 6500 G11 6501 G9 6502 I11 6553 A11 6554 H9 7520 C6 7521-A G4 7521-B I6 7522 H5 7523 C6 7524 C5 7525 E11 7526 G5 7527 E5 7528 F4 7529 I8 7535 A4 7548 I8 7549 F11 7556 F13 7558 E8 7560 B12 7561 B14 7562 C13 7563 C12 F491 G5 F492 H8 F493 I7 F494 I8 F495 I9 F496 H8 F497 H10 F498 H10 F499 H F800 A F801 A F802 A F803 B F804 B F805 B F806 C F807 C F808 B F809 B F810 C F811 C F812 H F813 C F814 C F815 D F816 D F817 D F818 E F819 H F820 D F821 D F822 D F823 D F824 F F825 F F826 F F827 E F828 E F829 F F830 F F831 F F832 E F834 I F835 I F836 H F837 I F838 G F839 E F840 E F841 E F842 E F843 F F844 E F845 F F846 H Electrical diagrams and PWB’s CDR 3rd gen. 7. GB 52 CDR MAIN BOARD - CIRCUIT DIAGRAM 7 : POWER PART TESTPOINTS 2 3 4 5 6 POWER PART 7 8 9 10 11 12 13 14 1 5556 P12VKILL +5VA F800 F801 F802 2 1 D3V3 F803 47u GND 100n 2537 OUT 2535 IN 100n 2536 1A MP 2504 7535 LD1117 3 A 3533 3570 2 100R A 1542 11.8V BAS216 220u 2568 100u 6553 BLM21 100K 1 BC857B 7560 3 BC857B 7561 11.8V 14 F804 KILL 1543 B 100K 3539 5K6 3531 C 100n 220u 100n 2575 2574 -8VA 12VPWR 13 F826 A-8V F824 BLM21 2558 100u 2561 100n 10 F830 12 5551 7556 MC79L05ABD 2 3552 3 47K 6 IN 12VCP OUT F838 3 F812 8 7521-A MC34072 1 22u F491 3546 F846 5V 4 5.2V 5 G 11 7526 BC847B F836 100R 2 100n 12VCP 2551 2556 GND 11.8V 3545 6R8 L-5V NC 8 7 G 1 4 F F829 2557 12R 3544 47K 5V F825 7549 BC847B F843 L12V -8VA BLM21 3567 22K 100n 12R 3541 11V F832 +9SRVPWR 10n F831 F841 OUT 47u +5VA F842 3555 7528 1K2 BC847B GND 3542 E 7525 BC857B 100K F818 2555 100n 2577 5709 0.7V F845 9 7558 L78M09 IN 3557 GND_CASE 3566 12VPWR F844 BLM21 GND_CASE F840 2547 5503 3540 10K 8 10K 3554 BLM21 100K 5501 2565 100u 100n P12V BCP69 7527 POWER_UP BLM21 7 F839 14 F828 12VPWR GNDA 100n 2572 5542 5502 F827 11 D F821 BLM21 10K 10 BLM21 3556 9 2 5555 1A MP 2n2 3 1541 GND_CASE 2502 8 5500 2n2 4 2571 F822 F823 2500 7 5541 BLM21 +12VA 2n2 6 F -8VA KILL_OUT 2548 VDC1 5 EH-B 7562 BC847B 7563 BC847B 7524 BC847B 100n VFTD F817 6 EH-B F811 3532 47u 3536 100K 10K 3537 F814 2541 F816 3 2501 FROM PSU 2 5 1 2546 L5V 5K6 6 4 F820 7 F810 BLM21 VDC2 F815 1 1501 0.7V 5 F807 -8V during normal operation P12VKILL 1500 D F809 F813 0.7V 3538 10K E D5VS 5546 7523 BC847B POWER_UP F808 4 F806 7520 STD17N05 2 1 3 3560 P12V C TO DISPLAY BOARD 3559 47u 2543 1A MP 100n 2544 D5V 100K F805 5K6 5544 3562 5543 5K6 B 10V 5.2V 2562 7522 BC857B H F496 23.2V 6501 BAV99 2563 100n 100n 2550 2553 100n 100n 6500 BAV70W 27.5V F499 3550 47u 100R F492 F819 P12V 5554 F498 FS30V F497 27.4V 2507 10u 2505 10u 2506 33n 3013 1M H 3547 12VCP 15K 2552 1n 5 5V I 6554 BAV99 12VCP 3548 47K 8 F835 4.5V 3549 4 7548 BC847B 2508 F495 100n 17.8V F494 2509 F493 F834 100R 6 3551 3K3 7521-B MC34072 7 4.6V 6502 BZX284-C22 I 100n 4.6V 7529 BC857B 3104 123 4228.7 +5VA F837 3553 5.2V 100R CL06532018_052.eps 290200 {POWER_UP,KILL_OUT} 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1500 D1 1541 D4 1542 A4 1543 B4 2500 E2 2501 F1 2502 F2 2504 A12 2505 H12 2506 H12 2507 H10 2508 I8 2509 I8 2535 B5 2536 B4 2537 B5 2541 D5 2543 B4 2544 B4 2546 C7 2547 F6 2548 D5 2550 H8 2551 G4 2552 H4 2553 H8 2555 F12 2556 G13 2557 F14 2558 F12 2561 F11 2562 H8 2563 H8 2565 D6 2568 A5 2571 D3 2572 E2 2574 E8 2575 E9 2577 F2 3013 H13 3531 C12 3532 C12 3533 A13 3536 C6 3537 C6 3538 C4 3539 D5 3540 E10 3541 F6 3542 E6 3544 F4 3545 G4 3546 G4 3547 H5 3548 H6 3549 I7 3550 H10 3551 I6 3552 F5 3553 I6 3554 E5 3555 E5 3556 E4 3557 F4 3559 B12 3560 B14 3562 B13 3566 E10 3567 E11 3570 A12 5500 D2 5501 E2 5502 E2 5503 E2 5541 D4 5542 D4 5543 B3 5544 B3 5546 C7 5551 F11 5554 H10 5555 D6 5556 A5 5709 F3 6500 G11 6501 G9 6502 I11 6553 A11 6554 H9 7520 C6 7521-A G4 7521-B I6 7522 H5 7523 C6 7524 C5 7525 E11 7526 G5 7527 E5 7528 F5 7529 I8 7535 A4 7548 I8 7549 F11 7556 F13 7558 E8 7560 B12 7561 B14 7562 C13 7563 C12 F491 G5 F492 H9 F493 I7 F494 I8 F495 I9 F496 H8 F497 H11 F498 H10 F499 H9 F800 A6 F801 A12 F802 A6 F803 B13 F804 B14 F805 B6 F806 C8 F807 C8 F808 B13 F809 B12 F810 C11 F811 C12 F812 H3 F813 C5 F814 C5 F815 D2 F816 D2 F817 D2 F818 E10 F819 H12 F820 D1 F821 D7 F822 D2 F823 D2 F824 F11 F825 F11 F826 F12 F827 E2 F828 E2 F829 F14 F830 F4 F831 F3 F832 E11 F834 I7 F835 I6 F836 H4 F837 I7 F838 G4 F839 E6 F840 E6 F841 E9 F842 E5 F843 F7 F844 E3 F845 F4 F846 H5 Electrical diagrams and PWB’s CDR 3rd gen. 7. GB 64 CDR MAIN BOARD - CIRCUIT DIAGRAM 7 : POWER PART TESTPOINTS 2 3 4 5 6 POWER PART 7 8 9 10 11 12 13 A 6555 6556 6557 6553 F801 BAS216 BAS216 BAS216 BAS216 11.8V 3571 2 3533 100K D3V3 F803 47u 1 100n 2537 GND 2504 F802 2 OUT 2535 2536 IN 100n 3 1A MP A 0R 7535 LD1117 1542 3570 100u 2568 BLM21 P12VKILL +5VA F800 100R 5556 BC857B 7561 11.8V BC857B 7560 3 14 F804 KILL 1543 D5VS L5V 100K 56K 5K6 3531 47u 100n 3539 2576 KILL_OUT 100n F840 3566 12VPWR 220u F825 7549 BC847B 12VPWR 12VCP 13 F826 A-8V F824 BLM21 2558 100u 2561 100n 7556 MC79L05ABD 1 2 3 47K 6 IN 4 F838 3 F812 8 2556 5 G 11 7526 BC847B 22u F491 3546 5V 10V 5.2V F846 F836 100R 4 100n 12VCP 2551 7521-A MC34072 1 2 GND 11.8V 3545 6R8 L-5V NC 8 7 G F829 OUT 3552 2562 7522 BC857B 5.2V H F496 2550 2553 100n 100n 8 F835 4 3551 3K3 +5VA 7521-B MC34072 7 7548 BC847B 4.5V 3549 F834 100R 6 3104 123 4228.8 F499 3550 47u 100R F492 F819 P12V 5554 F498 FS30V F497 2505 10u 27.4V 2507 10u 2506 33n 3013 1M H 6554 BAV99 2508 5 I 6500 BAV70W 27.5V 12VCP 3548 47K 5V 6501 BAV99 2563 100n 12VCP 15K 2552 1n 23.2V 100n 3547 4.6V F494 F493 100n F495 6502 BZX284-C22 17.8V 2509 100n I 4.6V 7529 BC857B F837 3553 5.2V 100R {POWER_UP,KILL_OUT} 1 2 3 4 F 2557 -8VA 10 F830 12 5551 100n 12R 10n 100n 2575 3567 22K F843 3544 47K 5V F832 +9SRVPWR L12V -8VA BLM21 F841 OUT 2574 12R 3541 GND E 7525 BC857B 100K F818 47u F831 11V 7528 BC847B 2547 +5VA F842 1K2 220u 3555 0.7V 3542 2910 IN F845 9 7558 L78M09 2555 100n 2577 5709 3540 10K 8 F844 BLM21 GND_CASE 100n P12V BCP69 7527 10K 5503 7 F839 3554 BLM21 2565 100u 100n 2571 5501 BLM21 12VPWR GNDA POWER_UP GND_CASE F 5542 14 F828 C D BLM21 3557 EH-B BLM21 5502 F827 2501 EH-B 5555 1A MP GND_CASE 11 3532 GNDA 7562 BC847B -8VA 7563 BC847B F821 100K 9 10 1541 10K 3 2 2572 8 5541 BLM21 2n2 7 4 2502 5 5500 2n2 6 F822 F823 2500 6 F811 +12VA 2n2 5 5K6 +12VCD 2548 VDC1 7 1 5557 BLM21 100n VFTD F817 2541 F816 3 4 F820 1501 FROM PSU 2 3556 D F807 BLM21 VDC2 F815 1 0.7V 5 F810 5546 6 7524 BC847B P12VKILL 1500 B F806 7520 STD17N05 2 1 3 2546 3536 100K 10K 3537 0.7V 10K F809 -8V during normal operation F813 F814 3538 F808 4 7523 BC847B POWER_UP 3560 P12V C TO DISPLAY BOARD 3559 47u 2543 100n 2544 D5V 1A MP 100K 3563 F805 5K6 5544 3562 5543 5K6 B E 14 1 220u 1 5 6 7 8 9 10 11 12 13 14 1500 D1 1541 D4 1542 A4 1543 B4 2500 E2 2501 F1 2502 F2 2504 A12 2505 H12 2506 H12 2507 H10 2508 I8 2509 I8 2535 B5 2536 B4 2537 B5 2541 D5 2543 B4 2544 B4 2546 C7 2547 F6 2548 D5 2550 H8 2551 G4 2552 H4 2553 H8 2555 F12 2556 G13 2557 F14 2558 F12 2561 F11 2562 H8 2563 H8 2565 D6 2568 A5 2571 D3 2572 E2 2574 E8 2575 E9 2576 D6 2577 F2 2910 E7 3013 H13 3531 C12 3532 C12 3533 A13 3536 C6 3537 C6 3538 C4 3539 D5 3540 E10 3541 F6 3542 E6 3544 F4 3545 G4 3546 H4 3547 H5 3548 H6 3549 I7 3550 H10 3551 I6 3552 F5 3553 I6 3554 E5 3555 F5 3556 E4 3557 F4 3559 B12 3560 B13 3562 B13 3563 B14 3566 E10 3567 E11 3570 A12 3571 A11 5500 D2 5501 E2 5502 E2 5503 E2 5541 D4 5542 D4 5543 B3 5544 B3 5546 C7 5551 F11 5554 H10 5555 D6 5556 A5 5557 D6 5709 F3 6500 G11 6501 G9 6502 I11 6553 A11 6554 H8 6555 A10 6556 A11 6557 A11 7520 C6 7521-A G4 7521-B I6 7522 H5 7523 C6 7524 C5 7525 E11 7526 G5 7527 E5 7528 F5 7529 I8 7535 A4 7548 I8 7549 F11 7556 F13 7558 E8 7560 B12 7561 B14 7562 C13 CL06532018_065.eps 010300 7563 C12 F491 H5 F492 H9 F493 I7 F494 I8 F495 I9 F496 H8 F497 H11 F498 H10 F499 H9 F800 A6 F801 A12 F802 A6 F803 B13 F804 B14 F805 B6 F806 C8 F807 C8 F808 B13 F809 B12 F810 C11 F811 C12 F812 H3 F813 C5 F814 C5 F815 D2 F816 D2 F817 D2 F818 E10 F819 H12 F820 D1 F821 D7 F822 D2 F823 D2 F824 F11 F825 F11 F826 F12 F827 E2 F828 E2 F829 F14 F830 F4 F831 F3 F832 E11 F834 I7 F835 I6 F836 H4 F837 I7 F838 G4 F839 E6 F840 E6 F841 E9 F842 F5 F843 F7 F844 E3 F845 F4 F846 H5