Mitsubishi Electric HS-U449 Service Manual page 70

CONTENTS
PCB-INTERCONNECT ···················· C-1
(POWER) PCB-MAIN ························ C-2
(HIFI) PCB-MAIN ······························ C-3
(TIMER/OPEKEY) PCB-MAIN ·········· C-4
PCB-OPE ·········································· C-4
(Y/C/A) PCB-MAIN ···························· C-5
(CONT) PCB-MAIN ··························· C-6
C-1
HS-U449
( with )
SW
MS
NOTE
1. Each voltage should be within ± 20% of the DC voltages measured with a digital
voltmeter.
2. The voltages parenthesised on SP recording mode.
While those without parenthesised on SP play back mode.
3. Waveforms were taken with standard color bar signal.
4. TP6A, etc. show Test Points.
5. Capacitors
pF, for numbers more than 1
Value Not indicated
µF, for numbers less than 1
Dielectric
Not indicated : 50V
Strength
± 10 %
Not indicated = No Tolerance is indicated
for electrolytic capacitors
and ± 20 %
Tolerance = ± = ± = ± 0.25 pF
G 2 % N 30 % Q = + 30 % C
= ± = ±
J 5 % – 10 % D 0.5 pF
= ± = ±
K 10 % P = + 100 % Z = + 80 % F 1 pF
M = ± 20 % – 0 % – 20 % G = ± 2 pF
Not indicated : Ceramic capacitor
MF : Polyester capacitor
PP : Polypropylene film capacitor
ALM : Aluminus electrolytic capacitor
TF : Twin film capacitor
SC : Semiconductor ceramic capacitor
Parts
MP : Metalized paper capacitor
except
I
for MPP : Metalized plastic film capacitor
chips
MMF : Metalized polyester capacitor
Sort
MF,PP : Polyester polypropylene film capacitor
PS : Styrol capacitor
TAN or TANT : Tantalum capacitor
: Electrolytic capacitor
BP or NP : Non polarized electrolytic capacitor
Not indicated : Ceramic capacitor chip
II Chips : Electrolytic capacitor chip
BP or NP : Non polarized electrolytic capacitor chip
Characteristic
Not indicated : F or B (high dielectric percentage)
(only ceramic
CH,SL,etc : Temperature compensating types
capacitor)
6. Resistors
Ω
Not indicated =
Value K = kΩ (1000Ω)
M = MΩ (1000kΩ)
Parts
except Not indicated = 1/4W or 1/6W
Wattage for chips
Chips Not indicated = 1/10W
±
Not indicated = 5 %
= ± = ±
Tolerance D 0.5 % J 5 %
= ±
F = ± 1 % K 10 %
Not indicated : Carbon resistor
S : Fixed composition resistor
MB : Metal oxide film resistor (type B)
Parts
except CE : Cemented resistor
I
for W : Wire wound resistor
Sort
chips
M : Metal film resistor
MPC : Metal plate cement resistor
ML : Metal liner resistor
II Chips Not indicated : Chip resistor
7. This is basic schematic diagram.
Some sets may be subject to modification according to engineering imporovement.
SPECIFIC SYMBOL
Zener Diode
Fusible Resistor
Varicap
Crystal unit
Positive Thermistor
Air Gap
P
Thermistor
Part (resistor) attached on the
T
copper-foil side of PCB
Photo Diode
Ceramic filter
LED
8. Correspondence of the units in the Schematic
Diagrams to the SI units.
Schematic Diagram SI
Kiro K k
Hertz HZ Hz
Pico P p
SHADED COMPONENTS HAVE SPECIAL
CHARACTERISTICS IMPORTANT TO SAFETY.
B E F O R E R E P L AC I N G A N Y O F T H E S E
C O M P O N E N T S R E A D C A R E F U L LY T H E
PRODUCT SAFETY NOTICE IN THE SERVICE
MANUAL.
DON'T DEGRADE THE SAFETY OF THE
RECEIVERS THROUGH IMPROPER SERVICING.