akira CT-29FD9CPT, Руководство по обслуживанию

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Model No: CT-29FD9CP
T
Version 1.0
5
1. SAFETY INSTRUCTIONS
1-1 PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related
characteristics. These characteristics are often passed unnoticed by a visual inspection
and the protection afforded by them cannot necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement parts which have these
special safety characteristics are Identified in this manual and its,
Supplements: Electrical components having such features are identified by shading on
the schematic diagram and the part list. Before replacing any of these components, read
the parts list in this manual carefully. The use of substitute replacement parts which do
not have same safety characteristics as specified in the parts list may create shock, fire or
other hazards.
1-2 SERVICE NOTES
1. When replacing parts or circuit boards, clamp the lead wires to terminals before
soldering.
2. When replacing a high wattage resistor (metal oxide film resistor in the circuit board)
keep the resistor min 1 /2inch away from the circuit board.
3.
Keep wires away from high voltage or high temperature components.
2. GENERAL ALIGNMENT INSTRUCTIONS
THIS RECEIVER IS TRANSISTORIZED SPECIAL CARE MUST BE TAKEN WHEN
SERVICING, READ THE FOLLOWING NOTES BEFORE ATTEMPTING ALIGNMENT.
•
Alignment requires an exacting procedure and should be undertaken only when
necessary.
•
The test equipment specified or its equivalent is required to perform the alignment
properly.
•
Use equipment which does not meet these requirements may result in improper
alignment.
•
Correct matching of the equipment is essential. Failure to use proper matching will
result in responses, which cannot represent the true operation of the receiver.
•
Use of excessive signal from a sweep generator can cause overloading of receiver
circuit overloading should be avoided to obtain a true response curve. Insertion of
markers from the marker generator should not cause distortion of the response.
•
The AC Power line voltage should be kept by 120 volts.
•
Do not attempt to connect of disconnect any wire while the receiver is in operation.
Make sure the power cord is disconnected before replacing any parts in the receiver.
TEST EQUIPMENTS
Digital voltmeter . . . . . . . . . . . . . . . . . . . . . . . National Model VP-2600A or equivalent.
Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . Tektronix Model 2215A or equivalent.
Direct/Low-capacity probe . . . . . . . . . . . . . . . Tektronix Model P6120 or equivalent.
(Accessory of oscilloscope)
Color-Bar/Dot/Crosshatch generator . . . . . . . Tektronix Model 146 or equivalent.
Pif sweep marker generator . . . . . . . . . . . . . . Nihon Tsushinki Model 4723 or equivalent.
Gray scale pattern generator . . . . . . . . . . . . . PM5515 / 5518 or equivalent.