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UX-P55
JVC UX-P55 Service Manual
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1-40 (No.22036)
4.15
TDA7294 (IC9
40,IC941) : Audio amp.
•
Pin layout
•
Block diagram
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
-Us (POWER)
OUT
+Us (POWER)
N.C.
N.C.
MUTE
ST
AND-BY
-Us (SIGNAL)
+Us (SIGNAL)
BOOTSTRAP
N.C.
SUR
NON INUERTING INPUT
INVERTING INPUT
ST
AND-BY
GND
+Vs
BOOTSTRAP
OUTPUT
-Vs
SHORT
CIRCUIT
PROTECTION
MOS CUTPUT ST
AGE
MOS GHAIN &
LEVEL
SHIFTING
ST
AGE
BIPOLAR
TRANSCONDUCT
ANCE
INPUT ST
AGE
IN+
IN-
BOOTSTRAP
39
41
Table of Contents
Table of Contents
1
Important Safety Precautions
2
Leakage Shock Hazard Testing
2
Preventing Static Electricity
4
Grounding to Prevent Damage by Static Electricity
4
Handling the Traverse Unit (Optical Pickup)
4
Attention When Traverse Unit Is Decomposed
4
Disassembly Method
4
Important for Laser Products
5
Adjustment
5
Disassembly Method
6
Removing the Metal Cover
6
Removing the Rear Cover
7
Removing the Tuner Board
7
See Fig.
7
Removing the CD-R Mechanism Assembly
8
Remove the Rear Panel
8
Removing the Fan
8
See Fig.
8
Removing the Power Amplifier Board / Main Board / Heat Sink
10
Removing the Power Transformer Assembly
12
Removing the Front Panel Assembly
13
Removing the Display Board / Switch Board
14
Removing the Headphone Board
15
Removing the Cassette Mechanism Assembly
15
Removing the LED Board
15
Cassette Mechanism Assembly
16
Removing the Playback/Recording & Eraser Head
16
Reassembling the Playback/Recording & Eraser Head
16
Removing the Head Amplifier & Mechanism Control Board
17
Removing the Main Motor
17
Removing the Flywheel
18
Removing the Reel Pulse Board and Solenoid
18
Adjustment
19
Measurement Instruments Required
19
Measurement Conditions
19
Precautions for Measurement
19
Cassette Mechanism Section Adjustment
20
Mechanism Section Adjustment
21
Reference and Standard Value of Confirmation Matter Adjustment
21
Electric Adjustment
22
Electric Characteristic Confirmation
22
Flow of Functional Operation until TOC Read (CD)
23
Maintenance of Laser Pickup (CD)
24
Replacement of Laser Pickup (CD)
24
Description of Major Ics
25
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JVC UX-P55 Specifications
General
Brand
JVC
Model
UX-P55
Category
Stereo System
Language
English
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