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Zenith
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XBV443
Page 2
Zenith XBV443 - Page 2
108 pages
Manual
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CONTENTS
SECTION 1
. . . .
SUMMAR
Y
SECTION 2
. . . .
CABINET & MAIN CHASSIS
SECTION 3
. . . .
ELECTRICAL
SECTION 4
. . . .
MECHANISM OF VCR P
ART
SECTION 5
. . . .
MECHANISM OF DVD P
ART
SECTION 6 . . . . REPLACEMENT P
ARTS LIST
1
3
Table of Contents
Main Page
Section 1 Summary
3
Default Chapter
3
Table of Contents
3
Product Safety Servicing Guidelines for Video Products
4
Servicing Precautions
5
General Servicing Precautions
5
Insulation Checking Prodedure
5
Electrostatically Sensitive Devices
5
Specifications
6
Section 3 Electrical
10
Overall Wiring Diagram
11
Electrical Adjustment Procedures
12
Vcr Part
12
Electrical Troubleshooting Guide
13
Power(Smps) Circuit
13
System/Key Circuit
16
Servo Circuit
17
Osd Circuit
19
Y/C Circuit
20
Hi-Fi CIRCUIT
24
Tuner/If CIRCUIT
27
Block Diagrams
29
Power(Smps) Block Diagram
29
Tu/If Block Diagram
30
Y/C Block Diagram
31
Normal Audio Block Diagram
32
Hi-Fi BLOCK DIAGRAM
33
System Block Diagram
34
Circuit Diagrams
35
Power(Smps) Circuit Diagram
35
Tu/If Circuit Diagram
37
A/V Circuit Diagram
38
Hi-Fi CIRCUIT DIAGRAM
39
Jack Circuit Diagram
40
System Circuit Diagram
41
Waveforms
42
Circuit Voltage Chart
43
Printed Circuit Diagrams
44
Main P.C.board
44
Power P.C.board
46
DVD Part
47
Electrical Troubleshooting Guide & Waveforms
47
System Clock X601 (27Mhz)
47
Initializing between MPEG and SDRAM
47
Initializing between MPEG and Flash
48
Reference Voltage 1
48
Reference Voltage 2
49
Checking the Initial Step of M/D Ass'y
49
Checking the Video Signal
50
Checking the First Step of Servo (1)
50
Checking the Second Step of Servo (2)
51
Checking the Output of Audio Signal
51
Checking the Reset Port
52
Checking the Focus & Tracking Servo
52
Checking the Track Jump
53
The Status of CD_LD and DVD_LD in
53
The Status Focus and Spindle Motor
54
Data Stream
54
Input Clock to IC202
55
Tray Open and Close
55
Focus Drive Signal(FACT)
56
Signals for Front Micom
56
FACT and FE for DVD9 (Dual Disc)
57
System Clock of MPEG IC
57
Block Diagrams
58
DVD Overall Block Diagram
58
SERVO Block Diagram
59
MPEG Block Diagram
60
AUDIO Block Diagram
61
Circuit Diagrams
63
Rd Servo Circuit Diagram
63
System Circuit Diagram
64
Audio Circuit Diagram
65
Circuit Voltage Chart
66
Section 4 Mechanism of VCR Part(D-37)
69
Position Drawing of Deck Mechanism Parts
70
Top View
70
Bottom View
70
Disassembly and Assembly of Deck Mechanism
71
Plate Top Disassembly
72
Holder Assembly CST
73
Disassembly of Gear Assembly Rack F/L
73
Opener Door
73
Arm Assembly F/L
73
Lever Assembly S/W
73
Motor Assembly L/D
74
Gear Wheel
74
Arm Assembly Cleaner
74
Head F/E
74
Base Assembly A/C Head
74
Brake Assembly T
75
Arm Assembly Tension
75
Reel S / Reel T
75
Base Assembly P4
76
Opener Lid
76
Arm Assembly Pinch
76
Arm T/Up
76
Supporter, Capstan
77
Belt Capstan/Motor Capstan
77
Lever F/R
77
Clutch Assembly D37
77
Gear Drive/Gear Cam
78
Gear Sector
78
Brake Assembly Capstan
78
Plate Slider
78
Lever Tension
78
Lever Spring
78
Lever Brake
78
Gear Assembly P2/Gear Assembly P3
79
Base Assembly P2/Base Assembly P3
79
Base Loading
79
Base Tension
80
Arm Assembly Idler Jog
80
Deck Mechanism Adjustment
81
Fixtures and Tools for Service
81
Previous Preparation for Deck Adjustment
83
Torque Measuring
83
Prior Adjustment
84
Fine Adjustment
84
Prior Adjustment
85
Fine Adjustment (Azimuth Adjustment)
86
X-Distance Adjustment
86
Adjustment of Drum Assembly (Video Heads)
87
Deck Assembly
87
CUE or REV
87
Check of Tape Curl and Jam Status
87
Removal of Foreign Materials
88
Grease Application
90
Guide for Troubleshooting
92
Deck Mechanism
92
Front Loading Mechanism
95
Exploded Views
97
Front Loading Mechanism Section
97
Moving Mechanism Section(1)
98
Moving Mechanism Section(2)
99
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