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"R1" unit: 13.6V DC power goes to battery even in off state (AC plugged in). On AC220V in MPX-X2 0.1mkF 894H-2CH1-f-S U03 C1224 Fixed by replacement of C2 (25V 22uF) and C3 (25V 22uF). "R2" unit: remade to charger only (no T2, no Q14, no Q18) "R3" unit: beeping continiously after 2 seconds with transformer load sound (self test). v2 PD640-3079A-Z BE550/700G APCC 2009 640-3079-Z_REV04 changed ะก30 (25V 22uF) - no result with other battery - it starts, but cannot switch to AC power after test - relay clicks back to DC... "APC powerchute personal edition" says it is on battery power (discharging)... or charging, but wrong input voltage (about 180V), replaced C2 (25V 22uF) - fixed start and input voltage detection "R4" unit: replaced battery (vertically installed - swelled) |
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It was offered replace C14 (100uF*25V) and C30 (22uF*25V) near beeper BZ1. Replaced - no result, but they were bad as well, especially C30. IC2 (LM358) has curcuit with C25 and C2 - effective replacement offered: http://zival.ru/content/apc-be550g-rs-pri-vklyuchenii-pishchit Found heating 25WIRWI KY5050 TI. As user manual says: Constant tone might be caused by: 1) Replace battery - Battery is in need of charging or is at the end of its usual life and must be replaced. "Power On" and "Replace Battery" LEDs - Flashing (alternating). Alarm terminates when UPS turned off with the power switch. 2) Battery disconnected - The battery is disconnected or bad battery. Replace Battery LED - flashing. Alarm terminates when UPS turned off with the power switch. 3) Overload Shutdown - During On Battery operation a battery power supplied outlet overload was detected. None LEDs. Constant tone until UPS turned off with the power switch. 4) If the battery fails the self-test, the Power on LED will flash and the unit will emit a constant tone. We have 3rd(R1) and 4th(R3) cases. |
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Main board uses power transistors ST P80NF55 80A 55V (MOSFET) for PRI_A and PRI_B on aluminium bricks. And FDP3651U MOSFET without heatsinks on 5A_125VAC. Input AC line: resistors, TI 1431C (programmable reference). 2209 DI1510 (bridge rectifier) on input AC used, + 10uF450V capacitor, + 1222 LNK520PN (CV/CC switcher), + E153515 transformer. Chip 122351b PIC18F2455 has PD640-3079A-Z firmware. 640-3079-7_REV04 main board has 2 satellites: 640-3079-Z_REV04 both (one relay 793-P-1C-B-S 001 and one 460-1006-Z-001 E151908 CMX 1226 +LM358 +1431C). |
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APC 700 transfor schematics (XFMR): Coil#1: WHT thick (PRI_A) to P80NF55 Drain, Source to B- BLK thick (PRI_B) to P80NF55 Drain, Source to B- RED thick to B+ RED thin to remote double relay and low-voltage curcuit 0.5 Ohm Coil#2: BLK+WHT thin on connector to Relay AC220 9.5 Ohm in case of reverse connection to AC power in 230V Coil#3: BRN thin to 1B47BH Drain, Source to B- BLU thin to 1B47BH Drain, Source to B- 1.3 Ohm |
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"R2" charger details: "RED thin" provides 13.5V+ power to T and battery charge ? (disconnected white and black - still red powered) "RED thin" goes through F3 to U2-pin1 (EL 816 GK218) and R74 and R88 and C24 (25V 330uF - to Ground 13.6V idle) and D1 (PJ2119 ER26) and C27. |
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C3 C2 C25 C30 -> 22uF 25V C1 C18 C52 -> 4.7uF 35V ESR problem - they had correct capacity |
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Transformator 430-2078A test with input AC 220V to balck+white (thin) 8 wires: Red = mid coil01 , 8V to black or white Black to White (thick) 16V AC Brown to blue (thin) 24V AC
430-2078A_Z150H_E154515.JPG (168,998 bytes) |
- Anonymous