Leica WILD M690, Руководство по обслуживанию

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SERVICE MANUAL
OPTICS CARRIER
DOC CODE SML 556 912 V.1990
lnspection of focus motor
Measure on focus/zoom board
(12)
between (11) GND and (10).
Voltmeter on range 20VDC. Switch (4) on Zoom.
Supply 5VDC to cable (2).
Voltage (11)-(10):
At key (5) UP
≈
- 4 V D C
At key (5) DOWN
≈
+4VDC
Remove bridge from (6) and connect ammeter, range 1ADC.
Current at key (5) UP/DOWN
≈
400mADC
Sledge movement from stop to stop in
≈
15 sec.
Supply 10VDC to cable (2).
Voltage (11)-(10): At key (5) UP
≈
9 V D C
At key (5) DOWN
≈
+ 9 V D C
Current at key (5) UP/DOWN
≈
500mADC
Sledge movement from stop to stop in
≈
6.5sec.
Current taken by motor (without loading) at 5V
≈
270mADC.
Motor resistance: Plug J19 pulled out.
Ohmmeter in range Ohm xl ; value of J19/1 - J19/2
≈
2
Ω
lnspection of zoom motor
Measure on focus/zoom board (12) between (11) GND and (9).
Voltmeter in range 20VDC. Switch (4) on Zoom.
Supply 5VDC to cable (2).
Voltage (11)-(9): At key (5) UP
≈
+ 4 V D C
At key (5) DOWN
≈
-4VDC
Remove bridge from (6) and connect ammeter, range 1ADC.
Current at key (5) UP/DOWN
≈
70 - 120 mADC.
Zoom movement from stop to stop (V7 - V36) in
≈
5-6sec.
Supply 10VDC to cable (2).
Voltage (11)-(9): At key (5) UP
≈
+ 9 V D C
At key (5) DOWN
≈
-9VDC
Current at key (5) UP/DOWN
≈
140 - 190 mADC
Current taken by motor (without loading) at 5V
≈
5mADC.
Motor resistance: Plug J18 pulled out.
Ohmmeter in range Ohm xl ; value of J18/5 - J18/8
≈
21
Ω
Error Possible causes
No voltage, no current
Current at (6) without motor
Voltage present, but no current
Current too great when motor connected
Board, wiring.
Board, wiring.
Motor, connection.
Motor, mechanical parts.