Hitachi V-209 Service Manual

The S\\ itches  are set as shown  in the  table  below  to establi�h 
each  power  �upply  mode 
Switche  Po\.1.-er sourc e  Power 
mode 
upply lnode  select 
witch (J) 
select  witch  @ 
----
t  AC 
IXOP 
DC  D OP 
DC  t- 0 
OP 
When  charging  DC 
BATT 
CI-IARGC 
(AD-209) 
*DC  II to  14V  IS supphed  via EXT  DC I PUT  connector.   
After  completing  the charge  of AD-209,  be sure  to set 
power  mode select sw1tch  to DC  OPE. 
When  the output  voltage  of  DC power supply  becomes  less 
than  II...

Front 
View 
8  

8 
rJ) 
Rear View 9  

CD 
POWER  switch 
After  checking  the line  voltage  select switch,  set POWER 
switch  set to OFF  and then  connect  the AC  cord  to AC 
wall  socket. 
(})  POWER  lamp 
This  lamp  goes on in red  when  the power  supply  is in 
ON  state. 
G)  CHARGE  lamp 
This  lamp  goes on in red  in the  battery  charge mode. 
When  the battery  is completely  charged, this becomes 
dim. 
@)  FOCUS  control 
After  obtaining  an appropriate  brightness by operating 
INTENsity,adjust  FOCUS until the bright...

@ 
CH2 INPUT  connector 
Thr  same  as CHI,  but when  the instrument  is used  as an 
X- Y  oscilloscope,  the signal  input to this  terminal 
becomes  the Y -axis  signal. 
@@  Input coupling  switches (AC-GND- DC) 
Used  to select  the coupling  system between  the input 
signal  and vertical  axis amplifier. 
AC  At 
this  setting.  the signal  is connected  through  a 
condenser.  The DC component  of the  input 
signal  is cut  off and  only  the AC component  is dis· 
played. 
GND  At this...

AL 
T Signals  applied  respectively  to CHI  and CH2 
appear  on the  screen  alternatively  at  each sweep. 
This  setting  is used  when  the sweep  time is short  in 
2-channel  observation. 
CHOP  At this  setting,  the input  signals  applied  respec­
tively  to CHI  and CH2  are switched  at  about 
250  kHz independent  of the  sweep  and at the 
same  time appear  on the  screen.  This setting  is 
used  when  the sweep  time  is  long in 2-channel 
observation. 
ADD  The algebraic  sum of the...

It is indisp ensable  to the  measurement  of the  time  of 
waveform. 
Bright  line is moved  toward  right when  the knob  IS ro­
tated  clockwise  and toward  left with  counterclockwise 
rotation.  The outer  shaft is for  coarse  adjustment  and 
the  inner  shaft for fine  adjustment. 
@  x 
10  MAG  control 
A  and  B sweeps  are magnified  I 0  ume s by  pulling 
out  FINE  knob (inner  shaft)  of POSITION.  In 
this  case,  the sweep  time is I /10  of the  value  indicated 
by  TIME tDJV. Bring...

LINE This setting  is used  when  observing  a signal  trig­
gering  with power  supply  line frequency. 
EXT  External  triggering  signal applied  to TRIG  IN­
PUT  becomes  the triggering  signal. 
This  setting  is used  when  triggering  with a special 
independency  of the  vertical  axis signal. 
@  TRIG  INput connector 
Input  terminal  used for external  triggering  signal of 
A  sweep. 
@  TRIG  LEVEL  control 
14  Used 
to decide  at which  portion  of the  waveform 
the  sweep  should  be...

quency 
signal (30Hz or less). 
TV(V)  This setting  is used  when  observing  the enure 
vertical  picture of television  signal. 
TV(H)  Th1s 
setting  is used  when  observing  the entire 
horizontal  picture of television  signal. 
(NOTE)  Both TV V and  TV H synchronize  only when 
the  synchronizmg  signal is negative. 
(5)  Miscellaneous 
@  EXT  BLANK  connector 
Input  terminal  for brightness  modulation.  It is  of  the  DC 
coupling.  The brightness  is reduced  with  a  positive signal 
and...

Charging 
of battery 
I)  ( onne..:t  the \C  cord  10 an  AC  outlet  and  set the ,\(-DC  swnch (J) to  DC  and  the  DC 01'  B \  fT 
CIIARGL  switch@ to BAIT  CHARGE. 
:::!  )  Turn 
on the  pl)>N er  swit..:h CD  and the charging  will stan. 
In  this  case.  the POWER  lamp is not  illuminated. 
3)  T
he  ( 111\RG!  la mp  Q)  is bemg  J!luminated  dunng the 
� h arg e.  II will  take  about  IS hours  until  the batte ry  is 
charged  completely.  When the charging  is completed,  the 
CHARGf...