6
HTP305-SW
4. SCHEMATIC AND PCB CONNTCTION DIAGRAMS
NOTE FOR SCHEMATIC DIAGRAMS
(Type 1A)
1. When ordering service parts, be sure to refer to
"PARTS LIST of EXPLODED VIEWS" or "PCB
PARTS LIST".
2. Since these are basic circuits, some parts of them or the
values of some components may be changed for improve-
ment.
3. RESISTORS:
Unit: k:k
Ω
, M:M
Ω
, or
Ω
unless otherwise noted.
Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise
noted.
Tolerance: (F):
±
1%, (G):
±
2%, (K):
±
10%, (M):
±
20% or
±
5% un-
less otherwise noted.
4. CAPACITORS:
Unit: p:pF or
µ
F unless otherwise noted.
Ratings: capacitor (
µ
F)/voltage(V) unless othrewise noted.
Rated voltage: 50V except for electrolytic capacitors.
5. COILS:
Unit: m:mH or
µ
H unless otherwise noted.
6. VOLTAGE AND CURRENT:
: Signal voltage at rated output.
or
←
V:
DC voltage (V) at no input signal unless otherwise noted.
Value in ( ) is DC voltage at rated power.
mA or
←
mA:
DC current at no input signal unless otherwise noted.
7. OTHERS:
• or : Adjusting point.
• : Measurement point.
• The mark found on some component parts indicates the im-
portance of the safety factor of the parts. Therefore, when re-
placing, be sure to use parts of identical designation.
8. SCH-
&
ON THE SCHEMATIC DIAGRAM:
• SCH-
&
indicates the drawing number of the schematic dia
gram. (SCH stands for schematic diagram.)
9. SWITCHES (Underline indicates switch position):
• MAIN + CONT. ASSY
S501 : PHASE Rev / Norm
S502 : AUTO POWER ON/OFF
V
NOTE FOR PCB DIAGRAMS
1. Partnumbers in PCB diagrams match those in the schematic
diagrams.
2. A comparison between the main parts of PCB and schematic
diagrams is shown below.
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