Canon 540EZ - Speedlite - Hot-shoe clip-on Flash User manual

Canon
Service Manual
ENGLISH EDITION
SPEEDLITE
040EZ
(C50-0711, 0712)
© CANON INC.,1994
CY8-1200-120

Canon
SPEEDLITE 540EZ
(Meters) C50-0711
(Feet) C50-0712
SERVICE
MANUAL

Application
This manual has been issued by Canon Inc. for qualified persons to learn technical theory,
and repair of products. This manual covers all localities where the products are sold. For
this reason, there may be information in this manual that does not apply to your locality.
Corrections
This manual could include typographical errors or technical inaccuracies due to
improvements or changes in the products. When changes occur in applicable products or
in the content of this manual, Canon will release service manual report as the need arises.
In the event of major changes in the contents of this manual over a long or short period,
Canon will issue a new editions of this manual.
The following paragraph does not apply to any countries where such provisions are
inconsistent with local law.
Trademarks
The product names and company names described in this manual are the registered
trademarks of the individual companies.
Copyright
This manual is copyrighted with all rights reserved. Under the copyright laws, this
manual may not be copied, reproduced or translated into another language, in whole or in
part, without the written consent of Canon Inc..
Copyright © 1994 by Canon Inc.
CANON INC.
Camera Service Administration Div.
30-2 Shimomaruko 3-Chome, Ohta-ku, Tokyo 146, Japan
First published October, 1994
Publisher: Osamu Ohkubo (Photo Products Quality Assurance Div.)
Editor (Japanese): Kiminori Igari (Camera Technical Support Department)
Editor (English): Harley Ferguson (Camera Technical Support Department)
Production: ABE Corporation
This manual was produced on an Apple Macintosh™ II ci personal computer and OKI
MICROLINE 801PS+F laser beam printer; block copies were printed on Varityper™ 5300
with 4000-J RIP.
A Canon mo-5001S Magneto-Optical Storage Subsystem with mo-502M Magneto-Optical
Storage Disk Cartridge and mo-IF2 interface kit were used for storing large volumes of page
layout and graphic data for this manual.
Graphics were produced with either Aldus Free Hand™ 3.1 or Adobe Illustrator® 3.2.
All documents and all page layouts were created with QuarkXPress™ 3.1E.

PREFACE .
This manual contains information on servicing the product. It has the following
sections.
Part 1 General Information
Provides the basic information needed to understand the product.
(Operating instructions are not included. Refer to the products instruction book if
necessary.)
Part 2 Technical Information
Provides technical information about the mechanism and electronics of the product.
Part 3 Repair Information
Provides information about the tools and expendables required for disassembly,
reassembly, adjustment and measurement of the product, and their locations and
method of use.
Part 4 Parts Catalog
Part 5 Electrical Diagrams
Appendix

CONTENTS
Page
Part 1: General Information
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Part 3: Repair Information
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Part 4: Parts Catalog
Part 5: Electrical Diagrams
1. SCHEMATIC DIAGRAM
2. WIRING DIAGRAM
3. PATTERN DIAGRAM
3.1 (A) CBA
3.2 (B) CBA
3.3 (D) CBA
3.4 (E) CBA
3.5 (H) CBA
eee

Part 1
General
Information

Part 1: General Information
1. FEATURES
1.1 INTRODUCTION
The 540EZ system is a high powered clip-on flash unit with full power GNo = 28 to 54 (at
ISO 100em ). Characteristically, this system is a top-class flash unit that features ten
new or improved functions based or the desires and opinions of current users of the
430EZ, and that answers user complaints about the 430EZ with regard to operating per-
formance. In particular, this system gives advanced flash photography due to its compat-
ibility with 5-point focusing and 3-point TTL metering when mounted on the EOS-1N.
1.2 FEATURES
Omgv
woe
10.
Li
12
13.
14
15.
16.
M: Newly added feature of 540EZ
QO: Feature functionally improved from 430EZ
Powerful auto zoom flash with full-power GNo.28 - 54 (ISO 100.m)
Built-in wide panel provides coverage for 18mm super-wide-angle.
Quick auto zooming covers wide-angle 24 mm to medium-telephoto 105 mm
in less than 0.8 sec (at normal temperature)
A-TTL auto flash control, TTL auto flash control system
* When this flash unit is mounted on the EOS-1N, 3-zone auto flash expo-
sure control is coupled to the 5-point focusing.
Auto flash confidence lamp verifies exposure immediately after shooting.
AF auxiliary light compatible with 5-point focusing is incorporated.
(Effective distance-- center; 0.5m to 15m; Outside: 0.7m to 6m)
Three types of external power packs are available depending upon market
area: . The Laminate Pack E, Transistor Pack E or Compact Battery Pack E.
Quick charging with all power sources.
Independent flash exposure compensation can be performed in the range of
+3 stops in increments of 1/3 stops, giving a wide range of possibilities.
* When this system is mounted on the EOS-1N or EOS5, auto flash control
exposure level can be compensated from the camera also.
Eight-step (Full to 1/128) manual flash and 1 to 100 Hz / 31-step multi-
flash control.
* Flashes per burst (1 to 100 / 31 steps) can also be set.
Shoe lock (lock pin operated in connection with a clamping ring)
. Large, easy to read display using an LCD with built-in uniform electrolumi-
nescent illumination.
First curtain sync or second curtain sync can be selected.
. Bounce is possible.
* Right: 60° to 90° / Left: 60° to 180°/ Upward: 60° - 90° / H Downward: 7°
* Locking at the upward / downward or left/right 0° position and upward
90° position (Lock is released by pressing the relevant unlock button.)
Built-in SE function that turns off the power source automatically in 90 sec
* The SE function can be cancelled by the main switch.
High-level flash lighting can be performed by using multi-flash photographic
system accessories.

Part 1: General Information
2. SPECIFICATIONS
1. Model
1.1 Type Direct-connection contact clip-on type TTL auto exposure
flash unit (with AF auxiliary light compatible with 5-point
focusing, A-TTL pre-flash, auto zoom, and bounce mech-
anism)
1.2. Compatible cameras All EOS series models
2. Guide number
2.1 Normal full power (ISO 100emeters)
Timm) [18 [2 | 8 | % | 0 | 70 | & | 105 |
jen | 16 | 2 | 9 | 9% | @ | 46 | 60 | 54
2.2 Quick firing The same as manual firing at 1/2 to 1/16 power.
2.3 Manual firing (ISO 100em)
ui) a
33
Par pea [ios Tier Tas 163
are 3 a1 [88 | 95
3. Number of Flashes / Power Source
Power Source Flashes (Minimum to Maximum
Internal Battery (LR6 Alkaline) 120 to 800
Intemal Battery (KR15/51 NiCd) 50 to 350
Extemal Laminated Pack (Japan) 500 to 3,000
Extemal Transistor Pack (LR14 Alkaline) 400 to 2,500
Extemal Transistor Pack (Ni-Cd Pack TP) 350 to 2,000
Extemal Compact BP-E (LR6) 400 to 2,500
The number on the left is the minimum number of flashes in A-TTL mode
and number of flashes in manual mode (1/1).The number on the right is
the maximum number of flashes in A-TTL mode. All numbers are approxi-
mate and based on Canon's test method.
The number of flashes when set to manual 1/2, 1/4, 1/8, 1/16, 1/32,
1/64 or 1/128 becomes respectively about 2,4, 8, 10, 12, 15 and 18 times
as large as the number at full power (1/1).

4. Recycle time
Power Source
Internal (LR6 Alkaline)
Internal y (KR15/51 NiCd)
Laminated Pack (Japan)
Part 1: General Information
Recycle Time (Minimum to Maximum)
0.2 -2 sec
0.2 - 1.5 sec
0.2 - 1 sec
Quick Firing Mode Normal Mode
0.2 - 13 sec.
0.2 - 7 sec.
0.2 - 3 sec.
Transistor Pack (LR14 Alkaline) 0.2 - 1.5 sec 0.2 - 8 sec.
Transistor Pack (Ni-Cd Pack TP) 0.2 - 3 sec.
0.2 - 5 sec.
Compact BP-E (LR6)
* The left-hand values are the minimum recycle time in A-TTL mode,
and the right-hand value are the maximum recycle times in A-TTL
and manual (1/1) modes.
5. Flash coverage angle
5.1 Zoom system
5.2 Zoom methods
5.3 Zoom stop positions
5.4 Zooming speed
5.5 Setting position display
6. Bounce
6.1 Bounce Angle
By fixed condenser lens and internal zoom system, with
built-in wide diffuser panel.
(1) Auto zoom
Automatically set with the camera SW-1 ON, coupled
with the focal length information from the lens.
(2) Manual zoom
The zoom position is switched in sequence by operat-
ing a push switch.
(3) Wide diffuser panel
When the built-in wide panel is set to MANUAL, the
zoom position is automatically set to the 28mm posi-
tion to cover the angle of view of an 18mm lens.
Seven positions: 24mm, 28mm, 35mm, 50mm, 70mm,
80mm and 105mm. When set to a bounce position in
auto zoom mode 5.2 (1), the zoom position is automati-
cally set to the 50mm position.
Approx. 0.8 sec (at normal temperature)
Digital numeric display on LCD
Direction Detent Positions
Up 0° 60° 75° go°
Down O0to7° o° 7°
Left 0 to 180° 0° 60° 73° goe 120° 150° 180°
Right 0 to 90° 0° 60° 7D) go°
6.2 Bounce lock
6.3 Bounce display
Locks at the upward/downward and left / right at O°
positions, and at the upper 90° position
When set to a bounce position, the bounce mark is dis-
played on the display panel.
1-3

Part 1: General Information
7. Control system
7.1 Firing modes
(1) Normal firing (pilot lamp: Lights red when flash is
ready to fire)
(2) Quick firing (pilot lamp: Lights yellow-green when
flash is ready to fire.)
This mode keeps the recycle time at or below 2 sec-
onds.
Both the built-in power source and external power
source can be used except in the following conditions.
* Quick firing inhibit conditions
1) When the camera's film transport mode is set to
continuous exposure mode.
2) TTL auto flash control mode
* When the camera is set to manual exposure mode
* When using the TTL hot shoe adapter
3) During manual firing at 1/1, 1/2
(3) Multi-firing
The multi-firing function is activated when the X con-
tact is turned ON if the flash is charged, performs
multi-firing at the set frequency (1 to 100 Hz), and
stops firing when the X contact goes OFF, at the end
of the set firing count (1 to 100 times), or when the
charge falls below threshold. When this mode is
selected, the quantity of light is set to the initial value
of 1/16 power, and can be changed by operating the
up/down button. However, it cannot be set to 1/1 or
1/2.
1) Usable frequency (31 steps)
1 ~ 20 Hzin 1 Hz steps; 25 ~ 50 Hz in 5 Hz steps;
60 to 100 Hz in 10 Hz steps.
2) Number of Flashes (31 steps)
1 ~ 20 times in 1-step increments; 25 ~ 50 times
in 5-step increments, 60 ~ 100 times in 10-step
increments
* If the number of flashes is not set, dashes appear
on the LCD panel.
Continuous firing starts when the X contact is
turned, and is stopped in the following conditions.
a. X contact OFF
b. Insufficient flash charge
c. Absolute firing limitation is reached as shown.

Part 1: General Information
3) Firing frequency and firing count limitations: At
each frequency, a firing count exceeding the val-
ues shown in the following table cannot be set.
ree Te Ts
hy |7 [6
30 20
ea [e0_[o0 [so [0 |
1/64 90 80
1/128 100 |100 |100 |100 | 100 pe 90 | 80 | 80 | 70
a tata ts tats tata
[4 [4 [444 |a
40
jas | 7 [60 [20 | 60 [0
rite [25 [90 [os [ao [as [50 [wo [70 [oo]
bette erate fete te te fete
Grace =
oo
2 | 2 |
ra
coe sie |
1/64 30 | 30 |30 20 | 20
#0” [40 [40 [40 [40 |40 [40 [40 [40 [40 |
(4) Test flash: Test flash can be performed by the test
flash button (which also functions as a pilot lamp).
A-TTL or TTL mode: Full power
Manual or multi-firing mode: Flash output according
to the set power setting
* However, test flash is impossible when the camer-
a's metering timer is ON.

Part 1: General Information
2
19
7.4
7.5
7.6
Teal
7.8
7.9
Flash control aperture setting (@: Setting factor)
EOS "Body" Metering
Camera Exp. Mode
Shutter-priority AE
Aperture-priority AE
540EZ Preflash
Program AE (full)
Manual
Synchronous shutter speed setting (EOS-1N)
Camera Exp
Shutter-priority AE 1/250* sec. or slower
Aperture-priority AE Automatic 1/250* - 30"
Program AE (full)
Manual
Automatic 1/250* - 1/60
Manual
1/250* sec. or slower - Manual setting
* The maximum synch speed is determined by the EOS body in use.
Exposure control modes (1) A-TTL auto flash
(2) TTL auto flash
(3) Manual
Flash duration control TTL auto flash control by EOS body control and off-the-
film metering
Flash exposure check OK: After shooting, the green confidence lamp lights for
about 2 seconds.
NG: The confidence lamp does not light.
Flash exposure compensation
(1) Auto
Daylight fill-in flash and auto reduction control for
high brightness controlled by each EOS body.
(2) Manual compensation by operating the 540EZ
Manual compensation in the range of +3 stops in
1/3-stop increments (When the shooting mode of the
camera is not in the full auto mode, the auto flash
exposure level is compensated.)
(3) Manual compensation by operating the EOS-1N or
EOSS
Electronic dial operation on the body.
* When items (2) and (3) are simultaneously set,
item (2) has priority.
Flash Coupling Range (1) A-TTL normal firing: 0.5 to 30 m
(2) A-TTL low-voltage firing: 0.5 to 7.5 m (min) to 21 m
(max)
Coupling range display Display in the LCD panel.

8. Display
8.1 LCD display
8.2 Charge complete display
8.3 Display unit illumination
9. Synchro timing
10. Flash duration
11. Color temperature
12. Film speed
13. AF auxiliary light
13.1 Light source
13.2 Pattern
13.3 Effective range
Part 1: General Information
(1) Zoom position (hyphens are displayed when the flash
head is in a bounce position.)
(2) Manual zoom mark
(3) Flash aperture value
(4) TTL auto flash mode (A-TTL, TTL)
(5) TTL flash coupling range (numeric bar display)
(6) Manual firing mode
(7) Manual output level
(8) Manual correct distance (numeric bar display)
(9) Multi-firing mode
(10) Multi-firing frequency (Hz)
(11) Multi-firing frequency
(12) Second curtain sync setting
(13) Bounce mark
(14) Catch light reflector setting
(15) Flash exposure compensation mark
(16) Flash exposure compensation value
* For the diplays of (5) and (8), the user can select
either meters or feet by setting the switch in the
battery compartment.
(1) Normal charge complete display: The red pilot lamp
(LED) comes on. (Full charge - 1 step)
(2) Quick charge complete display: The yellowish green
pilot lamp (LED) comes on. (Full charge - 4 steps)
Full-surface uniform transmission illumination (yellow-
ish green) for the LCD panel is incorporated.
The lamp comes on for 8 seconds when the illumination
button is pressed. (When this button is pressed in the
lamp ON status, the lamp goes out.)
Either first or second curtain sync can be selected.
1.5ms or less
Equivalent to daylight.
ISO 6 to 6400. No setting on flash, controlled by the
camera. The flash coupling distance range shifts with
the film speed.
Ultra-high luminance red LEDs (2 used)
Stripe compatible with 5-point focusing system (center:
vertical, left/right: horizontal)
Center 0.5 to 15m; Outer 0.7 to 6m (in low-light)
1-7

Part 1: General Information
14.
Power switch
15. Power source
16. Connectors
Lh.
18.
Dimensions
Weight
Three-step slide switch: OFF (O mark), ON (I mark) and
SE (Save Energy).
ON: Always ON without SE.
SE: When switch is ON, power is automatically turned off
after about 90 seconds idling.
As soon as the SE function is activated, the LED goes
out (the set mode is stored in memory). The power is
turned on again by pressing the shutter button of the
camera to the first step or pressing the test flash but-
ton. (Compatible with flash photography when using
the interval timer function of the Technical Back E.)
(1) Built-in power source
(a) Four AA-size alkaline cells LR6 (AM-3)
(b) Four AA-size Ni-Cd cells
* Four AA-size lithium cells (FR-6)
(2) External power sources
(c) AA-size alkaline-manganese cells LR6 (AM-3) x 6 -
9 V (Compact Battery Pack E)
(d) Laminated battery (0210 type 315V) (Laminated
Pack E315)
(e) Battery magazine TP (C-size alkaline cells LR14
(AM-2) x 6 - 9 V) (Transistor Pack E)
(f) Ni-Cd pack TP (NR-SC Ni-Cd cells x 6 in sealed
pack) (Transistor Pack E)
(1) Camera connector
1) Fixed accessory shoe screw lock type with a lock
screw tightening coupled lock pin
* The lock pin protrudes 1.6mm by the spring force
coupled with tightening.
2) Terminals: Direct-coupled 6-pin contact
(2) External power connector: Dedicated 3-pin socket.
80 (W) x 138 (H) x 112 (D)mm
405g
(LR6 batteries: +100g)

Part 1: General Information
19. Multi-flash Accessories When multi-flash accessories are used, some main unit
20. Others
functions are lost. (®@ : Function normally)
540EZ
Function
EOS-1N
Off-camera
Shoe
Cord
TTL
Adaptor
A-TTL Auto Flash x (Note 1)
Coupling Range Display x
Exposure Confidence Lamp
540EZ Flash Compensation x (Note 2)
Manual Firing / Power Selection
Multi-firing / Condition setting @
Second Curtain Sync x (Note 3)
A-TTL IR Pre-flash
AF Illuminator
Save Energy with SE selected
Note 1: When the 540EZ is used in A-TTL mode immediately before
multi-flash is used, the display remains without change.
Note 2: In the multi-flash state, the flash exposure compensation value
of the 540EZ can be set but it does not function.
Note 3: Though the second curtain syne mark can be set, first curtain
sync mode is actually used.
. When using the EOS-1N or EOS5 in the multi-flash photogra-
phy, flash exposure compensation can be performed by the
camera
(1) Mode memory
Even if the main switch is turned off, the current control mode
and zoom position are stored in memory.
When the battery is replaced in the main switch OFF state, the
settings are continuously stored in memory for about 1 minute.
(2) When the 540EZ is used with the EOS-1 or EOS-1N, the aperture
value display corresponds automatically to 1/2 step and 1/3
step displays.
(3) When the 540EZ with an EOS 630 or earlier camera, through
there is no shoe lock pin fitting hole, the lock pin protrusion is
absorbed by the spring and this permits mounting. This relates
to 16 (1), 1).
(4) Use of a commercially-available slave unit: Possible
* However, it is recommended to confirm operation in combina-
tion with the actual unit.

Part 1: General Information
21. Related products
21.1 New related products Soft case for 540EZ main unit
21.2 Existing related products (1) Compact battery pack E main unit
(2) Case for compact battery pack E
(3) Laminated pack E315 external power supply
(4) Connecting cord for laminated pack E315
(5) Case for laminated pack E315
(6) Strap for laminated pack E315
(7) Transistor pack E main unit
(8) Connecting cord for transistor pack E
(9) Case for transistor pack E
(10) Strap for transistor pack E
(11) Battery magazine TP for transistor pack E
(12) Ni-Cd pack TP for transistor pack E
(13) Ni-Cd charger TP for transistor pack E
(14) Off-camera shoe cord 2
(15) TTL hot shoe adapter 3
(16) Off-camera shoe adapter
(17) TTL distributor
(18) Connecting cord 60
(19) Connecting cord 300
*: Not all products listed are available in every market.
22, Supplement (Definitions)
22-1 New Battery LR6 and LR14 alkaline cells and laminated batteries
manufactured within 3 months are defined as new.
For the Ni-Cd pack TP, a fully-charged (for 15 hours or
more) pack is defined as new.
22-2 Nominal Guide Number
(1) For measurement, a guide number measuring instru-
ment calibrated by JCII is used. This complies with
the JCII standard measurement method.
(2) A new battery is used.
(3) Immediately after the red pilot lamp comes on, the
flash is fired 10 times in sequence. After that, 30
seconds after the red pilot lamp comes on for the
11th time, the measured value of manual full-power
flash is specified as the nominal guide number.
22-3 Nominal Recycling Time Anew battery is used. After the flash is fired 10 times
running as in 22-2 (3), the red pilot lamp comes on for
the 11th time. This interval is specified as the nomina
recycle time of manual flash firing.
22-4 Flashes per Battery A new battery is used. The flash is fired (1/1 full power)
continuously at intervals of 30 seconds. The number of
flashes, when the recycle time exceeds 30 seconds, is
regarded as the reference value. For A-TTL flash, this
value multiplied by 7 is regarded as the nominal maxi-
mum number of flashes.
1-10

Part 1: General Information
* REFERENCE MATERIAL
The maximum flash sync shutter speed and availability of an out-of-coupling-range
warning with A-TTL pre-flash for each EOS model is as follows.
X-syne shutter speed
Model name
17ias_|_17200
poseso | ——id =o
EOS 620 Fe
EOS 750
EOS 850
EOS 630*
EOS-1
EOS RT
EOS 10
ia!
ai
Ce
|
|
i> ||
EOS 700 ae
| @
tia
| @ |
L_@
Existance of A-TTL
out-of-coupling-range
warning function
EOS 1000*
EOS 100*
EOS 1000S*
EOS 5
EOS Kiss*
a
* Multiple Model Name List
[Tapan [North America [rope & Other
EOS 1000
EOS 100
EOS 1000S
EOS KISS EOS REBEL XS EOS 500

Part 1: General Information
3. NOMENCLATURE
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1-12

Part 1: General Information
4. MAJOR CONTROLS AND INDICATORS
Flash exposure compensation amount/
Manual firing output level
Zoom (Focal Lengh) Position
Manual Zoom Indicator
* Extinguished in auto zoom mode.
Flash Exposure Compensation Indicator
Bounce Indicator
: Up/Left/Right Bounce
~~ Indicator
peas hligh’ fi ti
A-TTL, TTL Automatic Flash Mode Y Catenlig cnn unian
Manual Firing Mode
Multi-Firing (stroboscopic) Mode
@
~~:
7°
Down
Position
Indicator
m: Distance values
ft: Distance values
* The user can select whether to
display meter or feet values by
setting the switch in the battery
chamber.
Coupling Range Display Bar
No. of bursts in multi-firing mode
Aperture value/Multi-firing frequency
Second-curtain sync mode
(*Extinguished during first-curtain
sync operation)
LCD Panel
(For Contents, refer to the above.)
Flash Mode Button
* Each press changes the mode
in the following sequence:
k ATTL PIM? MULTI 5
LCD Panel Illumination Button
* Illuminates the display for 8
seconds.
Zoom Button
¢ Each press changes the zoom
mode/position in the following
sequence:.
a —MZOOM24 528
105<80 <70 < 50 <¢ 35
¢ Automatically sets to the 28mm
position when the wide panel is
positioned over the flash head.
At this time, “MZOOM 18mm’ is
Ready
Lamp/Test
Flash
Button
displayed
in
the
LCD
panel.
* Lights yellow-green during quick
firing operation Main Switch
* Lights red at full charge ¢ Three positions available:
O: OFF
I: ON
SE: Flash automatically turns off
if no operation is performed within
90 seconds.
Flash Exposure Check Lamp
* Lights green for two seconds
if flash exposure is okay.
* Does not light if flash exposure
is insufficient.
Select/Set Button
¢ Activates the number-setting state to
enable selection of the flash exposure
compensation value, manual firing output
level, no. of bursts in multi-firing mode,
or multi-firing frequency.
Pressing this button causes the selected
value to start blinking, After the desired
i aes number is set using the plus and minus
buttons, pressing this button again locks
Sync Timing Switch Buttons in the value (causing it to stop blinking
¢ Simultaneously pressing these ang light steadily).
two buttons switches between
first- and second-curtain
synchronization timing.
Minus Button (-)
1
'
1
1
1
1 '
r
1
Figure 1-2 Major Controls and Indicators
1-13