Hitachi V-209 Service Manual

							MODEL V-209 
OSCILLOSCOPE 
------.._...__ -
OPERATION MANUAL 
~Hitachi Denshi. Ltd.  
						

							,;--· --------·---------·---. ---. - ·--._- ----·---- -- ---1 
If WARRANTY ,f 
~ ~ 1 Th1s H1tach1 Ocnsh1. Ltd . product 1s warranted  against defects in workman -{ 
I { 
sh1p and materiah. 
If any failure. re~uhing from  a defect in e1ther  workman-, ship or matenal. ~hall uc..:ur un:ll!r uormal  use within  one year  from  the ~ 
J origmal  date ot purcha~c. such failure shall  be corrected  free of charge to the f 
1 ongmal purcha~e by repair  or. at I htachi  Denshis  sole option.  replacement of ~ ){ the defective  part or pam \o charge shall  be made  for labor  or services L( pcrfonned dunng Stlld one  year period providing  the product is brought  to I 1
( our  AuthoriLcd Service  StCI\iie period  and during  the addi-ll 
1 tiona) 
penod overed  by two year~ pans warranty.  a reasonable charge  will 1 1~ be made  for labor or ~en1.:e perfom1eJ . t ll ThiS warranty does not cover  equipment  which has been  tampered  with in ll 
1 any way. or damage caused by acc1dent, negligence,  alteration, or misappli· 1 r cation. ll 
1 This 
product mu~t be returnt:d  transportation prepaid, properly  packed and r r~ insured.  This warranty apphes  only to the ongmal purchaser. ~~ 
'~ NO OTHI:.R WARRANTILS 1\Rl~ EXPRI:.SSED OR IMPLII:.D.  Huachi ~~ ~ Denshi.  Ltd. IS NOT LIABLI:: l-OR CONSEQUENTIAL DAMAGES. r 
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							CONTENTS 
Features  . .  . .  .  .  .  .  . .  .  .  .  .  .  .  .  .  .  .  .  ....... ... .. . ... ........ ..  . 
2.  Accessories  . .  . .  . . .  . .  .  .  .  .  . .  .  .  . . .  .  . . .  .  .  .  .  . . . .  . .  . .  .  .  .  .  . .  .  .  .  .  .  I 
3.  Precautions  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  .  .  . . . . . . . . . . . . . . . . .  2 
4.  Controls  and connectors  .  . . . . . . . .  . . .  . . . . . . .  . . .  . . .  . . .  . .  . .  . .  .  . .  6 
(I)  Power  supply  and CRT  . .  . .  . . . .  . . .  . . . .  .  . . . .  . . . . .  . . .  . . . . . . . .  6 
(2)  Controls  of vertical  deflection  system . .  . .  . .  . . . . .  . .  . .  . .  . . . . . .  .  . .  . I 
0 
(3)  Controls  of horizontal  deflection system . . .  . . . . .  . . .  . .  .  . . . . . . . . . . .  12 
(4)  Synchronization  system ...................................  13 
(5)  Miscellaneous.  . . . . . . . .  .  . .  . . .  . . . . . .  . .  . .  . .  . .  .  .  . . . . . . . . . . . .  15 
5.  Battery  operation  . . .  . . . . . .  .  . .  . .  . . .  . . . .  .  . . . . .  . .  .  . . .  . . .  .  . . .  . . . 
15 
6.  How  to produce  the bright  line . . . . . .  .  . . . . .  . . .  . . .  . . .  .  . .  . .  . . . . . .  . . 17 
7.  Method  for connecting  signals . .  . . . . . . . . .  . . . . . . .  . .  . .  . . . . .  .  . . . . .  .  19 
8  Measuring  procedure .  . . . .  .  . .  .  .  . .  .  .  .  .  .  • . . .  .  .  .  .  .  . .  . . .  . . .  .  .  .  . . .  ., ., 
(I)  DC voltage  measureme nt.  .  .  .  .  .  .  .  .  . .  . .  .  .  .  .  .  .  . . . .  .  .  .  .  . .  .  . . .  •  . .  ., 1 
(2)  AC voltage  measurement.  . . .  . .  . 
. . .  .  . .  . .  . . .  . . . .  . . . .  . . . . .  . . .  22 
(3)  Measurement  of frequency  and penod . . . . . . . . . . . . . . . . . . . . . . . . .  . . 23 
(4)  Measurement  of time  difference  ..............................  23 
(5 )  Measurement ofrise(fall)tll1le  ................................  24 
(6)  Synchronization  of compte  ed waveform  . . . . .  .  . .  . .  . . .  . . . . . .  . . . . .  25 
(7)  How  to use  TV  exclusJve  synchronization  . . . . . . . . .  . .  . . .  . . .  . .  . . .  .  .  25 
9.  AdJUStments  .  . . . .  . . . . .  . . .  . . .  . . . . . . . .  .  . .  . . . . .  . . . .  . .  . . . .  . 27 
10.  Maintenance  ............ .................... ............... 2 
II.  Specifications.  . . . . . .  . . .  . .  . . . . .  . . . . . . . . .  . . .  .  . . . .  . . . .  . .  . . . . . .  2 
12.  External  view ............. .................... ............. 32 
13.  Schematic  diagrams . . . . . . . . . . .  . .  . .  . . . . . . . .  . . . . . . .  . . . . . . .  . . . . .  33 
14.  Optional  accessories  . .  .  . . .  .  .  . . .  . .  .  . . .  .  .  .  . . . .  . .  .  .  .  .  .  .  .  .  .  . . . .  •  . 42  MODEL 
V-209  
						

							NOTE 
This  instrument  should be adjusted  at an  ambient  temperature  of +20°C 
for  best  overall  accuracy. 
Allow  at least  IS minutes  warmup  before proceeding. 
c  Polyvinyl  chloride (PVC) film is attached  on the  enclosure  and the front 
panel  of the  oscilloscope  to protect  the metal  surface.  If the  PVC  film is 
damaged  by  scratches,  remove it. 
To  clean  the enclosure  or the  front  panel,  use neutral  detergent.  Refrain 
from  using  thinner,  bent.me. alcohol or other  chemicals. 
For  safety  operation,  the instrument  chassis and cabinet  are sure  to con­
nect  the ground  lead of the  G  D  (ground ) terminal  to earth  ground,  if a 
two-wire  AC power  system  is used. 
Failure  to complete  the ground  system may allow  the chassis  and cabinet 
of  this  instrument  to be  elevated  above ground  potential  and pose  a shock 
hazard.  
						

							1. 
FEATURES 
The  Hitachi  V-209  is a handy- type, advanced-class  oscillo­
scope  with a bandwidth  of DC  to 20  MHz  designed  with the 
emphasis  on operability  and portability  and has a following 
features. 
(I)  Wide  bandwidth: 
The  instrument  has a bandwidth  from DC to 20  MHz. 
(2)  High  sensitivity: 
Sensitivity  is I m  V /div 
(3)  3.5-inch  screen: 
Employment  of an  internal  graticule  CRT permits  the 
waveform  observation  to be  made  without  parallax  error. 
(4)  3-way  operation: 
The  instrument  is  operated  with AC-line,external  DC and 
Battery  Pack AD-209. 
(5)  TV synchronization: 
Employment  of a new  TV sync  separator  circuit allows the 
instrument  to  observe TV signals  stably.  (6) 
Auto  focusing: 
Focusing  shift is automatically  corrected. 
2.  ACCESSORIES 
This  instrument  is shipped  with the following  standard 
accessories. 
2  Probes  (AT -JOAK  1.5) 
Fuse  1 A  for  I OOV  set or 0.5  A for  200V  set 
Fuse  2A for DC  line 
AC  power  supply  cord 
DC  power  supply  cord 
Operation  manual.  
						

							3. 
PRECAUTIONS 
Precauuon�  to be  observed  to lengthen  the service  life of 
:hb  10 trument. 
In  tallation  site 
•  ,\  vo1d 
tnstalltng  mstrument  in an  extremely  hot or cold 
place. 
Avoid  placmg  this instrument  in a place  exposed  to sun­
light  for a long  period  of time,  in a closed  car in mid­
summer,  or near  a room  heating  device such as a stove. 
The  operatmg  maximum  ambient  temperature  is +50°C. 
•  Do  not  use mstrument  that has been  left outdoors  on a 
cold  Winter  day. 
The  operatmg  ambient  temperature  is 0°C  or more. 
•  Avoid  moving  the instrument  rapidly  from  a hot  place  to a 
cold  place  or vice  versa,  or condensation  may form  on 
ms1de  of the  instrument. 
•  Keep  the instrument  away from damp  air, water,  and dust. 
L'nexpected  trouble 
may be caused  when the instrument  is 
placed  an a damp  or dusty  place.  The 
operating  ambient humidity  is 35  85�. 
Since  an accidental  antrusion of water  may also cause 
troubles,  do not  place  a water-filled  containers such as a 
vase  on the  oscilloscope. 
•  Do  not  place  the instrument  in a place  where  vibration  is 
strong.  Avoid using the  instrument  at a place  vibrating 
violently.  Since the oscilloscope  is a precision  instrument, 
excessively  strong vibrations  may cause  damage. 
•  Do  not  place  the anstrument  near a magnet  or magnetic 
body.  An oscilloscope  is an  equipment  using electron  beam 
Therefore,  do not  bring  a magnet  close to the  instrument  or 
do  not  use the instrument  near an equ1pment  generating 
strong  magnetic  force. 
Handling 
•  Do  not  put  a heavy  objects  on the  oscilloscope. 
•  Do  not  block  the ventilation  holes.  
						

							* 
Do  not  apply  a heavy  shock to the  oscilloscope. 
*  Do  not  insert  a wire,  pin, etc. through  the ventilation  hole. 
*  Do  not  drag  the set,  leaving  the probe  attached  to it. 
*  Do  not  leave  a hot  soldering  iron on the  cabinet  or the 
screen. 
*  Do  not  try to turn  the instrument  upside down. Otherwise, 
knobs  may  be broken. 
�b � 
*  Do  not  use the  instrument  upright, leaving BNC cable 
connected  to EXT  BLANKING  terminal on the  rear  panel. 
Otherwise,  the cable  may  be damaged.  Handle 
The  handle  of the  V- 209  can be positioned  for carrying 
or  as a tilt-stand  for the instrument.  To position  the 
handle.  press in at  both  pivot  points  and tum  the handle 
to  the  desired  position.  15 positions  are provided  for con­
venient  carrying  or viewing. 
3  
						

							When 
not in U!>e 
When  not m  u:.e,  put the dust-proof  cover on the  mstrumcnt 
aud  store  11 with  care. 
When  Operation  is faulty 
Recheck  the operating  procedure  and if problem  persists. 
contact  a nearly  service  station or agent. 
Care  and repair 
Removal  of stam  from the case. 
When  the outs1de  of the  case  is stained.  remove the stain 
hy  first  wiping  11 lightly  with a cloth  moistened  v. ith 
neutral  washmg  agent and then  w1pe  the surface  w1th a 
dry  cloth. 
•  '\ever  use strongly  volatile  agent such as bentine  and 
tl  mner  When  the 
panel surface  is stained,  remove the stain  in 
sm1ilar  way with  a clean,  soft cloth.  When heavy  stains 
are  present,  first remove  the stains  by w1pmg  the surface 
lightly  with a cloth  moistened  with diluted  neutral  wash­
ing  agent  or With  alc.:ohol  and then  wipe  thoroughly  with 
a  dry  cloth. 
When  dust has accumulated  on the  inside,  remove  it by 
using  dry brush.  or by  using  the exhaust  of a compressor 
or  a vacuum  cleaner. 
NOTE:  When opening  the case.  pull out the power  suppl] 
plug  beforehand  without fail 
When  cleaning  the inside, insure  beforehand that no 
electricity  remains in the  condensers  of the  power 
supply  circuit. 
•  Cleaning  of CRT 
01rty  surface  of CRT  screen  tends to cause  measuring  errors 
The  screen  surface  becames v1sible when the bezel  is remO\­
ed.  Remove  the stains  on CRT  and filter  by using  a clean  and 
soft  cloth,  paying  attention  not to impair  them. 
When  the stain  is extremely  heavy. wash them  with neutral  
						

							washing 
agent and then  leave  them  stand  until the moisture 
is  removed  naturally. 
o  If the  screen  is installed  while it is moistened,  water 
rings  may be formed  and the wavefom1  may be blurred 
to  make  observation  hard. Pay attention  not to leave 
finger  prints  on it. 
To  dismount  it, pull  it toward 
you  pressing  it at  the  both 
ends. 
Operation  precautions  Bcz:el 
*  Che ck  the  line  voltage  is in  the  range  specified  in the  table 
below. 
Rating  Allowable line voltage  (50/60Hz) 
ACIOOV  AC90V 130V 
AC200V  ACI80V 260V 
Usually  the voltage  selector  switch on the  rear  of the  V -209 
has  been  set to IOOV  AC at the  factory.  When this is operat­
ed  on  200AC  voltage,  set the  selector  switch to 200  V AC. 
(Rated  voltages  are marked  above the power  connector  on 
the  rear  panel.)  * 
Use  only  specified  fuses 
In  order  to protect  the circuit  against  over-current,  a 0.5A 
(in  primary  side of power  circuit)  and 2 A  (in secondary 
side  of power  circuit)  are used.  When  the fuses  blow  out, 
check  thoroughly  the cause.  repair any faulty  point present. 
and  then  replace  them with specified  fuses. Do not  try to 
use  the  fuse  other  than  the specified ones.  Otherwise, fault 
may  be caused  or danger  may be invited.  (Particularly.  do 
not  use a fuse  different  from the specified  one in current 
capacity  and in length.)  The standards  of the fuses are as 
follows. 
Shape  JIS type  name 
{Diameter  x length)  mm 
2 A  6.35cf> 
X 31.8 
MF6JNM250V  2A AC 
lA  6.35¢ 
X 31.8 
MF61 M250V  lA AC 
0.5A  6.35¢ 
X 31.8  MF61 M250V  0.5A AC 
*  -(negative)  terminal of EXT  DC I is inside  connected  to 
case  ground.  Do not  connect  -(negative)  terminal of the 
V-209  to the  + (positive)  grounded case of other  instru­
ments  with common  external DC power  source  to the 
V-209.  If not,  it is  very  dangerous  because a large  current 
nows  through  the grounded  line. 
5  
						

							6 V-209 
Grounded 
line 
Other  in�trument  Common 
external 
DC  power  source 
<  DANGEROUS  CONNECT> 
*  Do  not  apply  revere polarities  to EXT  DC  IN. 
•  Do  not mcreasc  the bnghtness  too much.  Your eyes rna) be 
steamed  and the nuorescent  surface of CRT  may be burnt. 
•  Do  not apply  an excel;sive  voltage. 
The  maximum  volt3ge of each  input  is as  follows. 
PUT  direct  250V (DC+  peak AC 3t I kilt.) 
When  xI 0 Probe  is used  250V (DC+peak  AC at I kilt.) 
E  T  TRIG  INPUT  250V 
(DC+peak  AC) 
EXT  BLA  Kl G  SOV 
(DC +peak  AC)  4. 
CONTROLS  AND CONNECTORS 
(I)  Power  supply  and CRT 
Operating  voltage and fuse 
Thts  model  can be operated  from e11her  3 100  volts  or a 
:!00  volts  nominal  line vohage  source. The line voltage 
select  switch  on the  rear  panel,  turn the instrument  from 
one  operating  range  to the  other.  In addition,  this switch 
changes  the primary  connections  of the  transformer  to 
allow  selection  of one  of two  regulating  ranges. Use the 
following  procedure  to  convert this instrument  between 
normal  line voltage  or regulating  ranges 
a.  Disconnect  the instrument  from the power  source. 
b.  To  convert  from I 00  volts  nominal  to :!00  volts  nomi­
nal  line  voltage  or vice  versa,  remove  the protector  of 
the  line  voltage  select switch. 
Change  the line  voltage  select switch  from I 00 volts  to 
200  volts  and remounting  the protector. 
c.  Before  apply the power  to the  mstrument,  check that 
the  indicating  tabs on the  rear  panel. 
Selection  of power  supply  mode 
This  oscilloscope  can make  operation  by using  three  kinds of 
AC  power  supply,  external  DC power  supply  and  A[}209bat­
tery  pack.  T