HP 214B - TROUBLESHOOTING HINTS A4 POWER SUPPLY BOARD

Model 2 14 B
TROUBLESHOOTING HINTS A4 POWER SUPPLY BOARD
1. Volta ge s at U601 ; U602; LJ 603; U604 ; U130 6 ilnd TP6
m us t be measured w ith wi re 927 remo ve ci (no hi gh voltage).
Note: Voitage Regula
tor s hel ve internal CUtT en t limiting.
2. T601 seco nd ary vo lt ages mea "ure ci witho ut l oa d.
f
=~ 6::: E9 67 ~ -: 11 · ·- - _ ~ _ V:L :~ R MS -
926 to 926 39.4 V
,
924 to 924 I 9.9 V
94
to 94 6.9 V
923 to 923 I 2(3 .2 V
L- _ _ ~ _ ~ _ ~_: _ ~ :~~ 1_ :;~~ ~
3. For troubl es hooti r ,g the High Volt age Power Supply remove the A 1 Out put Amp l if i er BOil! d
and W60 2. (214B input current is a ppro x. 200 mA ill 220 V AC ( 400 mA at 110 V AC ) ).
Check volt a ges as s how n below w ith DVM Comm on connected to TP1.
PIN
1
J602 ~ 230
0607 Coll ector
VR601 Cathode
TP4
CR606 Cathode
TP2
2
-
3
4
... -
j-- .
~ 19 2
+ 109 V
+9
V
+ 9.5 V
+ 228 V
+ 155 V
5 6
. 19 1 +191
·1
Note: Voltages may nr y sl ig htly
Check 06 01; 0 60 2; Q603 ail e! 0604 for sh ort cr open (Heatsink l.
Service
8-11
Scans by ArtekMedia => 2009