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TABLE OF CONTENTS
Important Service Guide
◆ Mode Switch (Program Switch) Assembly Point·························4
◆ How to eject the cassette tape
(If the unit does not operate on condition that tape is inserted
into housing ass’y)································································· 4
1. General
Getting Started
Index to parts and controls ················································· 1-1
Step 1 : Unpacking ····························································· 1-2
Step 2 : Setting up the remote commander························· 1-2
Step 3 : Connecting the VCR ············································· 1-3
Step 4 : Setting up the VCR with the Auto Set Up function 1-3
Step 5 : Setting the clock ···················································· 1-4
Step 6 : Selecting the TV system········································ 1-5
Selecting a language ··························································· 1-5
Presetting channels ····························································· 1-5
Changing/disabling programme positions ·························· 1-6
Basic Operations
Playing a tape ····································································· 1-7
Recording TV programmes ················································ 1-8
Recording TV programmes using the Easy Timer ············· 1-9
Recording TV programmes using the G-CODE system ·· 1-10
Recording TV programmes using the timer ····················· 1-11
Additional Operations
Playing/searching at various speeds ································· 1-12
Setting the recording duration time ·································· 1-12
Checking/changing/cancelling timer settings··················· 1-12
Recording stereo and bilingual programmes ···················· 1-13
Searching using the index function ·································· 1-13
Adjusting the picture ························································ 1-14
Reducing the VCR’s power consumption ························ 1-14
Changing menu options ···················································· 1-14
Editing
Connecting to a VCR or stereo system····························· 1-15
Basic editing ····································································· 1-15
Additional Information
Troubleshooting ································································ 1-15
Index ··························································································· 1-16
2. Disassembly
2-1 Mono Models
2-1-1 Case Upper ········································································· 2-1
2-1-2 Cover Bottom ····································································· 2-1
2-1-3 Ass’y-Panel Front ······························································· 2-2
2-1-4 Ass’y Main Board, Deck ···················································· 2-3
2-2 Hi-Fi Models
2-2-1 Case Upper ········································································· 2-4
2-2-2 Cover Bottom ····································································· 2-4
2-2-3 Ass’y-Panel Front ······························································· 2-5
2-2-4 Jack Board ·········································································· 2-5
2-2-5 Deck, Main Board ······························································ 2-6
3. P.C.Boards
3-1 Main PCB (AUS)································································ 3-3
3-2 Main PCB (E, HK, ME) ····················································· 3-7
3-3 Function PCB (Hi-Fi model) ············································ 3-11
4. Schematic Diagrams
◆ Block Identification of Main PCB············································ 4-3
4-1 S.M.P.S. (AUS) ··································································· 4-5
4-2 S.M.P.S. (E, HK, ME) ························································ 4-7
4-3 Power ·················································································· 4-9
4-4 System Control/Servo······················································· 4-11
4-5 Audio/Video ····································································· 4-13
4-6 Hi-Fi (Hi-Fi model) ·························································· 4-15
4-7 TM-Block ········································································· 4-17
4-8 OSD/VPS/PDC································································· 4-19
4-9 A2/NICAM (ED925/ED929/EZ725/EZ727) ··················· 4-21
4-10 Input-Output (RCA Jack) ················································· 4-23
4-11 Sub (Hi-Fi model) ···························································· 4-25
◆ Waveform ··············································································· 4-27
◆ Voltage Table ·········································································· 4-29
5. Alignment and Adjustment
5-1 Reference ············································································ 5-1
5-1-1 Location of adjustment button of remote control ··············· 5-1
5-1-2 Test point location for adjustment mode setting
(EZ121/EZ424) ·································································· 5-2
5-1-3 Test point location for adjustment mode setting
(ED225/ED323)·································································· 5-3
5-1-4 SW7T21 (TEST) location for adjustment mode setting
(ED825/ED828/ED925/ED929/EZ725/EZ727)················· 5-4
5-2 Mechanical Adjustment ······················································ 5-5
5-2-1 The number and position of test point ································ 5-5
5-2-2 ACE Head Position (X-Point) Adjustment ························· 5-5
5-3 Head Switching Point Adjustment ····································· 5-6
5-4 NVRAM Option Setting····················································· 5-6
6. Repair Parts List
6-1 Exploded Views ·································································· 6-2
6-1-1 Instrument Assembly (Mono model)·································· 6-2
6-1-2 Instrument Assembly (Hi-Fi model)··································· 6-3
6-1-3 Mechanical Parts (Top Side) ·············································· 6-4
6-1-4 Mechanical Parts (Bottom Side)········································· 6-5
6-2 Electrical Parts List ···························································· 6-6
•Abbreviation
AUS: Australia model
HK : Hong Kong model
ME : Middle East model
• Hi-Fi model: ED825/ED828/ED925/ED929/EZ725/EZ727
Mono model: ED225/ED323/EZ121/EZ424
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