TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1
DISASSEBLY FLOW CHART .................................... 1-1
1.2
HOW TO READ THE DISASSEMBLY AND ASSEMBLY ...... 1-1
1.3
DISASSEMBLY /ASSEMBLY METHOD .................... 1-1
1.4
Service position ......................................................... 1-4
1.4.1 How to set the “Service position” .......................... 1-4
1.5
Mechanism service mode .......................................... 1-4
1.5.1 How to set the “Mechanism service mode” ........... 1-4
1.6
Jig RCU mode ........................................................... 1-4
1.6.1 Setting the Jig RCU mode .................................... 1-4
1.6.2 Setting the User RCU mode ................................. 1-4
1.7
Emergency display function ....................................... 1-5
1.7.1 Displaying the EMG information ........................... 1-5
1.7.2 Clearing the EMG history ...................................... 1-5
1.7.3 EMG content description ...................................... 1-6
1.7.4 EMG detail information <1> .................................. 1-7
1.7.5 EMG detail information <2> .................................. 1-8
2. MECHANISM ADJUSTMENT
2.1
Before starting repair and adjustment ....................... 2-1
2.1.1 Precautions ........................................................... 2-1
2.1.2 Checking for proper mechanical operations ......... 2-1
2.1.3 Manually removing the cassette tape ................... 2-1
2.1.4 Jigs and tools required for adjustment .................. 2-2
2.1.5 Maintenance and inspection ................................. 2-3
2.2
Replacement of major parts ...................................... 2-6
2.2.1 Before starting disassembling
(Phase matching between mechanical parts) ....... 2-6
2.2.2 How to set the “Mechanism assembling mode” .... 2-6
2.2.3 Cassette holder assembly .................................... 2-6
2.2.4 Pinch roller arm assembly .................................... 2-8
2.2.5 Guide arm assembly and press lever assembly ..... 2-8
2.2.6 A/C head ............................................................... 2-8
2.2.7 Loading motor ....................................................... 2-8
2.2.8 Capstan motor ...................................................... 2-9
2.2.9 Pole base assembly (supply or take-up side) ....... 2-9
2.2.10 Rotary encoder ................................................... 2-10
2.2.11 Clutch unit ........................................................... 2-10
2.2.12 Change lever assembly,direct gear,clutch gear
and coupling gear ............................................... 2-10
2.2.13 Link lever ............................................................ 2-11
2.2.14 Cassette gear,control cam and worm gear ......... 2-11
2.2.15 Control plate ....................................................... 2-11
2.2.16 Loading arm gear (supply or take-up side)
and loading arm gear shaft ................................. 2-12
2.2.17 Take-up lever,take-up head and control plate guide .... 2-13
2.2.18 Capstan brake assembly .................................... 2-13
2.2.19 Sub brake assembly (take-up side) .................... 2-13
2.2.20 Main brake assembly (take-up side),
reel disk (take-up side) and
main brake assembly (supply side) .................... 2-13
2.2.21 Tension brake assembly, reel disk (supply side)
and tension arm assembly .................................. 2-14
2.2.22 Idler lever, idler arm assembly ............................ 2-14
2.2.23 Stator assembly .................................................. 2-14
2.2.24 Rotor assembly ................................................... 2-14
2.2.25 Upper drum assembly ......................................... 2-15
2.3
Compatibility adjustment ......................................... 2-16
2.3.1 FM waveform linearity ......................................... 2-16
2.3.2 Height and tilt of the A/C head ............................ 2-17
2.3.3 A/C head phase (X-value) .................................. 2-17
2.3.4 Standard tracking preset ..................................... 2-18
2.3.5 Tension pole position .......................................... 2-18
3. ELECTRICAL ADJUSTMENT
3.1
Precaution ................................................................. 3-1
3.1.1 Required test equipments ..................................... 3-1
3.1.2 Required adjustment tools .................................... 3-1
3.1.3 Color (colour) bar signal,color (colour) bar pattern ...... 3-1
3.1.4 Switch settings and standard precautions ............ 3-1
3.2
Servo circuit ............................................................... 3-2
3.2.1 Switching point ...................................................... 3-2
3.2.2 Slow tracking preset ............................................. 3-2
3.3 Video circuit ............................................................... 3-2
3.3.1 Auto picture initial settings .................................... 3-2
4. CHARTS AND DIAGRAMS
4.1
BOARD INTERCONNECTIONS ............................... 4-3
4.2
MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM ....... 4-5
4.3
MAIN (SYSCON) SCHEMATIC DIAGRAM ............... 4-7
4.4
MAIN (SW.REG) SCHEMATIC DIAGRAM ................ 4-9
4.5
MAIN (TUNER) SCHEMATIC DIAGRAM ................ 4-11
4.6
MAIN (FRONT) SCHEMATIC DIAGRAM ................ 4-13
4.7
MAIN (TERMINAL) SCHEMATIC DIAGRAMS ........ 4-15
4.8
MAIN CIRCUIT BOARD .......................................... 4-17
4.9
REMOTE CONTROLLER SCHEMATIC DIAGRAM ... 4-19
4.10 WAVEFORMS ......................................................... 4-20
4.11 VOLTAGE CHARTS ................................................ 4-21
4.12 CPU PIN FUNCTION .............................................. 4-22
4.13 SYSTEM CONTROL BLOCK DIAGRAM ................ 4-23
4.14 VIDEO BLOCK DIAGRAM ...................................... 4-25
4.15 AUDIO BLOCK DIAGRAM ...................................... 4-27
5. PARTS LIST
5.1
PACKING AND ACCESSORY ASSEMBLY <M1> ..... 5-1
5.2
FINAL ASSEMBLY <M2> ........................................... 5-2
5.3
DRUM ASSEMBLY<M2> ........................................... 5-3
5.4
MECHANISM ASSEMBLY <M4> ............................... 5-4
5.5
ELECTRICAL PARTS LIST ....................................... 5-6
MAIN BOARD ASSEMBLY <03> ............................... 5-6
AUDIO CONTROL HEAD BOARD ASSEMBLY<12> .... 5-9
LOADING MOTOR BOARD ASSEMBLY <55> ......... 5-9
HR-A37U
HR-A37U(C)
INSTRUCTION BOOK(FR)
NOT USED
USED
WARRANTY CARD
NOT USED
USED
RESIST. CARD
USED
NOT USED
SER. NET CARD
NOT USED
USED
The following table lists the differing points between Models (HR-A37U and HR-A37U(C)) in this series.
MODEL
ITEM