Yashica Electro 35 AF-mini, Руководство по ремонту

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R
/`
/
AUTO
QCE
CD
R4
R5
BULB
O - Ü
BULB
SVVITCH
Cl
FLASH
T R - 1
¶
o
s *fåb «U1
åßgofiäfoffä
S4
swf*
LI
ê
RED
L A M P R ı s
TR2
7 I _
C2 C3
R19
ELECTROMAGNET
YELLOW
LAMP
TR4
RELEASE
SWITCH
T R 3 /
/ S 7 B A T T E R Y
/ S V V I T C H
6%
í í l ß ı ı ı ı ı ı p í ı x ı í í í í l l fi l l l i í í í i
HEAVY LINES INDICATE CUERENT PATH
Fon YELLOW (sLow) WAENLNG LAMP L2
/
5 /
M . / _ D L A P H B A G S / ( )
E EESISTÜR
ß ß b ß ß e f g ß L /
/
/ ( + ) L 3
: › I
BATTERY -
BATTERY-TE ST
SWITCH
Depressing the release button a little further connects the yellow lamp L2. Lamp L2
turns on when the light conditions are so dim that a shutter speed slower than 1/30 second
is required. The resistance of the CdS cell is then high
The high resistance of the CdS cell keeps transistor TR1 turned off -- the voltage dropped
across R5 is too low to trigger the transistor. Consequently, transistors TR2 and TR3
are also turned off. As long as transistor TR3 is turned off, transistor TR-4 conducts.
And the current flowing through transistor TR4 also flows through the yellow lamp L2.
R20
T R _ 5 R 2 1