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Figure 103

controls the shutter-speed scale. First set
the 0 shutter-speed setting, Fig. 103; that

lets  off  most  of  the  initial  tension.
Remove the speed  knob and  unscrew the
nut  holding  the  speed  selector.  Then,  as

you lift o ff the speed selector, disconnect

the tungsten wire from the adjustment

collar,  Fig.  103.  Careful  —  the  ball  detent
and  compression  spring  for  the  speed
selector  will  be  loose.  W e'll  describe  the
procedure  fo r  reconnecting  the  tungsten

wire during reassembly.

Now take out the tw o screws holding

the pulley bracket, Fig. 103. W atch for

the loose spacer under one end of the

bracket (the end closer to the back of the
camera). Now lift out the mask lever. Fig.

103, and disconnect the wire link that
runs between the mask lever and the

viewfinder mask.

Remove the complete flex circuit by

taking out the tw o screws holding the
RTV resistor, the tw o screws holding the

SPD board, and the tw o ground screws
at the side of the mirror cage. A t the back

of the flex circuit, you can now see the

LED display and IC2, Fig. 104.

If you just want to check IC2, you can

reach the IC w itho u t completely removing

the flex circuit. Take out the tw o ground

screws  at  the  side  of  the  mirror  cage.
Then  lift the  LED  base plate,  Fig.  104,  far
enough  from  the mirror cage to reach  the

IC. Suppose, for example, that you're
getting no LED readout..You might check

for 3V at pin 2 of IC2, Fig. 104, w ith the

release button partially depressed.

It's also possible to check the individual

LEDs w itho u t removing the flex circuit

completely. Fig. 104 points out the hole

that receives the ground screw. Connect

a jumper between the ground land at the

other side of this hole and the fro n t plate.
Then push the release button part way to
supply the LED anode voltages.

If you now short between a cathode

lead and ground. Fig. 104, the LED con
nected to that output should turn on.

W hat if it doesn't? The particular LED may

not be getting the 3V anode voltage (you
can check the anode voltages after remov
ing the plastic cover over the LED display).

Or the LED may be defective. However,

you can't get the LED base plate as a
separate part. A defective LED requires

replacing the complete flex circuit.

Fig. 105 shows the top of the shutter/

mirror-cage assembly after removing the

flex circuit. Notice that the speed-control

cam is now loose. In Fig. 105, you can see

how the speed-control cam positions the
mechanical-speed lever (the lever that

controls the shutter's bulb lever). A pin

on the mechanical-speed lever rides

against the speed-control cam. The pin

on the underside of the speed-control

cam positions the release-slide latch.

MIRROR-CAGE REPAIRS

For most of the mechanical repairs on

the mirror cage, you don 't have to
remove either the flex circuit or the shut

ter. In fact, you may not even have to

remove the mirror cage from the body

casting. If the problem is in the air

cylinder or the memory-time-lag adjust-

SPEEDCONTROL

LED DISPLAY

WIRE CLAMP

HOLE
FOR
GROUND
SCREW

LED BASE PLATE

MECHANICAL-
SPEED LEVER

Figure 104

Figure 105

Содержание XD-11

Страница 1: ...Minolta XD 11 Repair Guide Figure IB OVERRANGE LED SHUTTER SPEED SCALE UNDERRANGE LED DIAPHRAGM WINDOW Figure 3 Figure 4...

Страница 2: ...ong other innovations the XD 11 settled the debate over aperture preferred vs shutter speed preferred automation it gives you a choice between either mode To program the camera for automatic shutter s...

Страница 3: ...perture sizes A combination magnet permanent magnet plus electromagnet limits the movement of the diaphragm closing lever As the diaphragm closing lever starts to move the permanent magnet holds its a...

Страница 4: ...with its own batteries However you can connect a 3V DC power supply to the battery compartment Fig 8 Connect the positive power supply lead to the battery compartment terminal and connect the negativ...

Страница 5: ...st be closed before the comparator output connects to the base of T6 S1 sits at the bottom of the camera Fig 11 When you cock the shutter S1 closes to connect the comparator to T6 S1 opens after the e...

Страница 6: ...re may be a problem with the release switch or with the release circuit But if the transistor T6 is at fault you w on t have to go any fur ther You can make a final check on T6 by shorting between the...

Страница 7: ...g 16 away from the M1 core toward the front of the camera The M1 ar mature now opens switch S7 Conse quently you should measure around 1 3V at the white wire connection Fig 15 The technique for holdin...

Страница 8: ...manent magnet Fig 17 Dirt can prevent the core from magnetically hold ing the armature If cleaning doesn t do the job the per manent magnet may be defective Try pushing the armature of M2 away from th...

Страница 9: ...D IAPH RAG M CONTROL IC2 SHUTTER RELEASE LOCK DRIVER FOR LEDs IC1 D IAPHRAG M CONTROL PHOTOCELL AMPLIFIER SPEED CONTROL OUTPUT LIGHT LEVEL FILM SPEED Figure 18 Actual schematic Figure 19...

Страница 10: ...ting provides the in put voltage to one input of the com parator the combination of the film speed setting and the photocell output provides the voltage at the other input If input 1 in Fig 19 is less...

Страница 11: ...sassembly Remove the speed knob and note the loose release pin The release pin closes the switches for the metering and release functions You can completely remove the camera back by depressing the hi...

Страница 12: ...ring Then rotate the wind lever in a counterclockwise direction as you seat it over the wind shaft The upper coil of the wind lever return spring sometimes sneaks under the wind lever If that hap pens...

Страница 13: ...e the film speed dial Why With the film speed dial remov ed the film speed brush doesn t make firm contact with the resistor ring Fig 31 The camera then exhibits the symp toms of an open film speed re...

Страница 14: ...ask lever pulls the mask over the window for the shutter speed indication Remember the shutter speed setting has no meaning in the A mode The spring loaded scale to the front of the pentaprism provide...

Страница 15: ...memory capa citor can continue changing as long as the memory switch Fig 36 remains clos ed Fig 33 points out the memory switch in the camera Just before the mirror starts to rise the insulated lever...

Страница 16: ...ansistor charges the timing capacitor With a larger more positive base voltage the transistor con ducts harder it then charges the timing capacitor more quickly However if there s no voltage across th...

Страница 17: ...the shutter to deliver only its fastest speed Suspect a poor ground connection if you measure a voltage at the red electromagnet lead when you par tially depress the release button If you measure arou...

Страница 18: ...l hang open If the trigger switch fails to close or makes poor con tact you w on t be able to bring in your shutter speed adjustments especially the fast speeds Erratic shutter speeds may also result...

Страница 19: ...parator provides the switch for the closing curtain electromagnet M3 When the comparator output at pin 16 drops low current flows through M3 to hold open the shutter The voltage at pin 16 goes high to...

Страница 20: ...Figure 41...

Страница 21: ...board Finally take out the four front plate screws Notice the position of the one slotted screw the locating screw in the upper wind side corner You can now separate the front plate m irror cage assem...

Страница 22: ...escribe a special tool for adjusting the LED readout a dummy camera body which has a special cutout over the variable resistors But according to Minolta the dummy camera body isn t available You can t...

Страница 23: ......

Страница 24: ...round 0 6V despite changes in current So with two diodes in series the voltage at pin 7 should remain constant at approximately 1 2V The filter capacitor C1 helps maintain the constant reference volta...

Страница 25: ...Figure 52...

Страница 26: ...istor labeled R47 in Fig 52 The f 22 lens moves the brush to the third resistance path here the S12 brush connects pin 9 of IC2 directly to positive battery Fig 52 With the f 32 lens the brush moves o...

Страница 27: ...he overexposure LED to re main on You can use another voltage check to test the diaphragm resistor after removing the top cover Measure the volt age between ground and the AV contact Fig 54 you should...

Страница 28: ...of the LEDs will turn on W ith the front plate m irror cage assembly removed you have a good view of S7 Fig 60 Fig 60 shows the mirror cage in the charged position The M1 ar mature now sits in contact...

Страница 29: ......

Страница 30: ...have to stop down as far in bringing the pin 8 voltage to the pin 11 voltage At the X B and 0 settings the shutter speed brush moves to the ground land shown just below the RTV resistor in Fig 63 Pin...

Страница 31: ...ve for transistor 1 Fig 64 The timing capacitor then charges more quickly You can then check the shutter speed resistor RTV by measuring the voltage to pin 20 of IC1 in the M mode Again the voltage sh...

Страница 32: ...14 of IC1 ground and the negative lead of C3 Fig 55 The large resistor has no effect on the normal operation However it allows the timing capacitor to eventually charge and close the shutter You may...

Страница 33: ...ixed resistor R56 as shown in Fig 69 Depress the release button part way to measure the voltage You should get a reading of 180mv 0 180V 2mv If not make the adjust ment using Rx7 Turning the wiper of...

Страница 34: ...ond and the diaphragm to f 16 With the film speed dial set to ASA 100 expose the lens to a light level of EV 9 Now measure the voltage between the common S11 path Fig 66 and ground Record your voltage...

Страница 35: ...y find that the shutter occasionally jams the closing blade doesn t quite complete its release movement Then by pushing down the closing blade from the back you may be able to get the shutter to opera...

Страница 36: ...Figure 73 WASHERS Figure 75 Figure 77 Figure 74 Closing blade set Part 2005 0712 01 Figure 76 Opening blade set Part 2005 0713 01...

Страница 37: ...out the three shutter retaining screws Then lift the shutter far enough from the mirror ARM CLOSING BLADE Figure 79 First section o f opening blade in position Figure 80 cage to reach the wires which...

Страница 38: ...closing blade push the bulb lever out of engage ment with the armature from left to right in Fig 84 The spring loaded armature then moves away from the electromagnet and strikes the closing blade lat...

Страница 39: ...e the armature But another lever the mechanical speed latch holds the armature to provide the full aperture speed The mechanical speed latch sits just under the bulb lever Fig 86 When the opening blad...

Страница 40: ...reasing the spring tension by turning the spring hooking tab counterclockwise causes the timing cam to rotate faster The result A significant change in the fast speeds But don t use the spring hooking...

Страница 41: ...re Fig 89 It s now up to the electromagnet the bulb lever or the mechanical speed latch to hold the ar mature and prevent the closing blade from releasing Also the ridge on the timing cam drives the t...

Страница 42: ...h that you don t lift up the blade driving levers If you do the pins on the other sides of the blade driving levers will come out of the slots in the blade sets Then if the in dividual blades shift in...

Страница 43: ...circuit for adjusting the trig ger switch Just connect the timing cir cuit to the shutter s lead wires as shown Figure 99 in Fig 98 There s only one problem you disconnect the shutter leads to remove...

Страница 44: ...agnet In Fig 100 we ve provided a variable resistor adjust ment to establish the reference voltage at the noninverting input of the comparator Use the variable resistor to adjust the tim ing circuit f...

Страница 45: ...he metering switch should close when the release slide moves down 0 4mm REMOVING THE FLEX CIRCUIT Other than for replacement purposes there aren t too many reasons to remove the flex circuit The compl...

Страница 46: ...tially depressed It s also possible to check the individual LEDs without removing the flex circuit completely Fig 104 points out the hole that receives the ground screw Connect a jumper between the gr...

Страница 47: ...resulting in a shorter delay between the closing of the release switch and the opening of the memory switch The time delay assures that the dia phragm reaches the taking aperture before the memory sw...

Страница 48: ...mir ror cage Remember though that remov ing the combination magnets requires that you readjust their positions on reassembly You can now see the diaphragm control parts The mirror tensioning lever mo...

Страница 49: ...se the eccentric if the self timer fails to pull down the release slide far enough to release the shutter TIMING THE SPEED SELECTOR On reassembly it s possible to replace the speed selector 180 out of...

Страница 50: ...tension on the spring the scale would definitely break After you connect one end of the tung sten wire hold the other end as shown in Fig 115 Now let go of the spring loaded pulley and allow the sprin...

Страница 51: ...ut the two wind seat screws Fig 119 Then lift out the wind seat Watch for a loose endplay spacer on the top of the wind shaft Fig 120 not all cameras use the endplay spacer Also if you removed the win...

Страница 52: ...e sprocket gear at the bottom of the body casting Watch for a washer on top of the sprocket gear You can now remove the take up spool from the back of the body casting Fig 123 The take up spool has th...

Страница 53: ...roper position of the notch Seat the two plastic gears on the base plate Then insert the counter ac tuator into the hole in the back sensing lever Rotate the counter actuator to the position shown in...

Страница 54: ...counter gear Fig 125 If the counter actuator doesn t align with the tooth slot and instead comes against one of the gear teeth you ll see the counter dial shift in position as you close the camera bac...

Страница 55: ...lastic gears in the Seiko aren t nylon they re Delrin the toughest of plastics The Delrin parts never seem to break Although the Seiko holds up under most types of abuse there s one mis treatment it c...

Страница 56: ...brown and red magnet leads Fig 39 shorted 3 H IC defective Check the voltage at pin 10 Fig 51 You should get 3V when the shutter releases 4 IC1 defective Check the voltage at the brown electromagnet...

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