HP 214B User Manual

Mo d el 214B
Service
SECTION VIII
SERVICE
8- 1 INTRODUCTION
8 -2 This section contains th e inf o rmati on to
se(vice th e HP Model 2148 . T he inf ormation inclurles
theo ry of operatioll, troub leshoot i ng , schema tic s.
comp on ent layouts and b loc k diagram.
8- 3 The schematics and compo nent layout s are
organized as 'Service Sheet5 which ;11"1 :: identified by a
large numbe r within a squilre in the lower cOI ·:'el·s. A
table re lal i ng l.hese Service Sheets to bOilrcl assemblies
is given i!l Tal)l", 8 ~ 1. S c he m~tic di ,)\, 1 i' lin symbols are
given in Tabl e 8 -· 3.
Table 8- 1. Ind ex to A:;se rr.b lies
8-4
Assembl y
A 1 Output Board
A2 T i min g Bo ard (Standal -d)
A2 T imi ng Bo ard (Option)
A3 Load Board
A4 Powel- Supply Board
A6 Bur st Board (Op:ioll)
Service Sheet
5
3, 4
A1- 1 ,A l - 2
6
2
A 1 ~ 3
SAFETY CONSIDERATIO NS
8- -5 This section conta ins warnings and ca uti ons
that mu st be fo lloweci for YOUI - protection and to avoid
damage to r he equ ipmen t :
8-6
8 ~- 7
WARNING
Dangerous voltages, capable of causing dea th are
pre senT in this instrument. H V ~ pow er supply and
output [ ilnplifier excepted, all o th er servicing can
be ac
co mplished wi thout the need for a high
voltage sup
ply. Befor e carrying out s uch servicing,
th erefore, avoid dc1nger to lif e and possible
instr u ment damage I; y disco nn ecting the whi te-red·
violet wire (w i!!.~powe~-~r:.. ord ren~9y"'e !.~L.!rom the
A4 power suppl y board. Isolate the crimp connec-
tor on the disconnected IVIre.
When servici ng is completc, the Aft er Service
Saf e ty CI)(~ck m ust be performer!.
AFTER SERVICE SAFETY CHECK
E xecute the fo !I O\ '-, '! 'q checks w h en ser vi cing
is compl eteci.
8 8 Disco
nnect PO' Net" cmd from li ne . Visually
inspe ct In teri or of ins trument f or any sign of abnom,ai
intel na !ly gPlle ra ted heat, such as disco l ored pri nter! cirru ;r
hoards or COlill) O llents, damage': ins ulation , or evicir,ne,,'
of arcing. Deter mine cause and t·e rn erly.
8- 9 Check cilhi net ! gr ouncl pin continuity in
accorciance "Nith lEe VDE Fl ex the power co rel while
mak ing the me as urem en t to detect fillY intermittent
di sconti nuity . Check intern al (F ounci con nection s on
boards and fram e. Al so check r",is tallce of any fro nt
m I-ear pan e! (]round terminal , mat-ked .-L
8 - -~ 1 0
Check ca lJine\!l inE ',olatioll in accnrcl i< r1ce
wit h lE e VDE. Repiace any cOll1po ncn t w hich res lJ :t s in
a fai lure o'
re fer to prociuction Memo or Sel vice Note
isslied by procluc1 divis ion for ;J!te, nate action.
8 -· 11
Check li ne fuse to vel ify that th e p i ( ipel
8- 12
Check th at safety covers are installed.
8- 1 :~
Check that a!1 coa xi,,! a ne! flat cables inside
are prop r,. ', ly connected. Ch ,xk t! :at all boal ds and th e
heatsink on the chiEsis are prcr-e ,- Iy cOllnpcted. Verify
that th e i;(;arr! cla:np is fit tpcl.
8- 14
Inf
orm HewI 8tt · Packar-ci (intern,; !! y, the
re sp onsible pmciuct clivisi l,n) of any I-epei ltwi f ai lures
in the
ilbo ve tests or any other 5afetv f ea tu res.
SERVICE BLOCKS (THEORY /
TROUBLESHOOTI NG)
8- 16
Th e theory of ope l-at ion and trou ble : ,hooting
is divide ,; into Service Blo cks, (,ach Se rvice Bl o, k CO!TeS-
pondi
'
1\] to a compl ete func tiD'~ wit hin the ~:1 4B.
Serv ice Bl ock 1 deals with ove,·,ill ins!: Lirn c,' _
trouble;;hoot ing, in cluding a ce:ai le ci block ci i,:': grarn of il li
HP 214B function s. The purpose of the gene' .i l :nst ' lim E·;, '
troubl c· , llooting is to pro v iciE"- <l fils t meat· ,,; of ,, 01 ;;I;n9
a fali it d(), ,"c ·n to a function . The Se rvic eman sho ul d the! '
proceed to tl w Service B! e>r· k plovirlil'O de !iiilcd tile (lIY
of 0pera!:on a :1(1 tloul l I C( I lO, ) tin g l, il1:5 f or that fUIl Cl i(1P .
A till lie relillillg funcl i .. ", [(. S(" · ~ ' r,: Plnc k i, qiven in
T;t! )ic 8 :-?
81
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HP 214B Specifications

General

Brand	HP
Model	214B
Category	Portable Generator
Language	English