JVC GR-AXM237 Service Manual

COMPACT VHS CAMCORDER

GR-AXM237UM

Regarding service information other than these sections, refer to the GR-AXM220U service manual (No. 86526). Also, be sure to note important safety precautions provided in the service manual.

SPECIFICATIONS

Camcorder

General

Format : VHS NTSC standard Power source : DC 6.0 V Power consumption

LCD monitor off,

viewfinder on : 4.2 W

LCD monitor on,

viewfinder off : 4.6 W

LCD monitor on,

viewfinder on : 5.2 W Signal system : NTSC-type Video recording system

Luminance : FM recording Color : Converted sub-carrier

Cassette : Tape speed

SP : 33.35 mm/sec. (1-5/16 ips) EP : 11.12 mm/sec. (7/16 ips)

Recording time (max.)

SP : 40 minutes EP : 120 minutes (with TC-40)

Operating

temperature :0°C to 40°C (32°F to 104°F) Operating humidity : 35% to 80% Storage temperature : –20°C to 50°C

Weight : Approx. 890 g (2.0 lbs)

direct recording Conforms to VHS standard

(–4°F to 122°F)

cassette

Dimensions : 198 mm x 119 mm x 99 mm (W x H x D) (7-13/16" x 4-11/16" x 3-15/

Pickup : 1/4" format CCD Lens : F1.6, f = 3.9 to 62.4 mm, 16:1

Viewfinder : Electronic viewfinder with

White balance

adjustment : Auto/Manual adjustment

LCD monitor : 2.5" diagonally measured,

Speaker : Monaural JLIP : ø3.5 mm, 4-pole, mini-head

Video :1 V

Audio : 300 mV (rms), 1 kΩ analog

16") (with the LCD monitor closed and with the viewfinder fully tilted downward)

power zoom lens with auto iris and macro control, filter diameter 40.5 mm

0.5" black/white CRT

LCD panel/TFT active matrix system

jack (compatible with RC-5325 plug)

(

p-p), 75 Ω unbalanced, analog output (via Video output connector)

output (via Audio output connector)

AC Power Adapter/Charger AA-V16U

Power requirement : AC 110 V to 240 V`,

Specifications shown are for SP mode unless otherwise indicated. E & O.E. Design and specifications subject to change without notice.

50 Hz/60 Hz

Power consumption : 23 W Output

Charge : DC 8.5 V VTR : DC 6.3 V

Charging system : Constant current, peak

Dimensions : 125 mm x 42 mm x 68 mm (W x H x D) (4-15/16" x 1-11/16" x

Weight : Approx. 270 g (0.6 lbs)

detection, timer controlled

2-11/16")

Cassette Adapter C-P7U

Dimensions : 188 mm x 25 mm x 104 mm (W x H x D) (7-7/16" x 1" x 4-1/8") Weight : Approx. 240 g (0.53 lbs) Accessory : “AA (R6)”-size battery x 1

Optional Accessories

•Battery Packs BN-V12U, BN-V20U, BN-V856U

•Car Battery Charger BH-V3U

•Battery Charger BH-VC10U

•Audio/Video Cable

•Car Battery Cord AP-V7U

•Compact VHS (

•Active Carrying Bag CB-V7U

Some accessories are not available in some areas. Please consult your nearest JVC dealer for details on accessories and their availability.

) Cassettes TC-40/30/20

This service manual is made from all recycled paper.

, 1.3 A , 1.8 A

No. 86544

February 2000

TABLE OF CONTENTS

DIFFERENT TABLE ................................................................................................................................................................ 1 to 2

4. CHARTS AND DIAGRAMS

4.1 BOARD INTERCONNECTIONS ................................................................................................................................ 4-1

4.2 CPU SCHEMATIC DIAGRAM.................................................................................................................................... 4-3

4.3 VTR DSP SCHEMATIC DIAGRAM............................................................................................................................ 4-5

4.4 REGULATOR SCHEMATIC DIAGRAM ..................................................................................................................... 4-7

4.5 MAIN CIRCUIT BOARD ............................................................................................................................................. 4-9

5. PARTS LIST

5.1 FINAL ASSEMBLY <M2> ........................................................................................................................................... 5-1

The following table indicate main different points between models GR-AXM220U and GR-AXM237UM.

ITEM

DC LIGHT Not used used

BODY COLOR Black Pearl gray

ZOOM 300X 450X

The following table indicate different parts number between models GR-AXM220U and GR-AXM237UM.

PACKING ASSEMBLY<M1>

REF NO.

2 PACKING CASE LY31561-007A LY31561-028A

! 5 IB (EN) LYT0478-001A LYT0505-001A

! IB (SP) – LYT0505-002A

! IB (PT) – LYT0505-003A

7 REGIST. CARD BT-51020-2 –

FINAL ASSEMBLY <M2>

REF NO.

ITEM

MODEL

GR-AXM220U GR-AXM237UM

! 101 LOWER CASE ASSY LY10122-033A LY10122-047A

106 FRONT COVER ASSY LY10124-041A LY10124-050B

106R COVER (LIGHT) LY30934-001A –

107 CASS. COVER (M) ASSY LY10131-019A LY10131-023A

108 UPPER CASE (M) LY10133-001C LY10133-002C

110 TOP COVER LY10129-074A LY10129-093A

113 OPERATION UNIT LY10120-035A LY10120-032B

116 DC LIGHT ASSY – LY30860-001B

116A LAMP – YQ44266

! 137 FRAME ASSY LY20372-002B LY20372-004A

137F CONTACT (LIGHT), X2 – YQ43810

137G E-SI C WIRE C-F – WJM0118-001A

146 KNOB (LIGHT) – LY41083-001B

Note: Mark – is not used.

MONITOR ASSEMBLY <M5>

REF NO.

! 500 MONITOR ASSY LYH20126-004A LYH20126-011A

! 502 COVER (MONI) ASSY LY20482-004A LY20482-011B

502A WINDOW LY31295-004A LY31295-009B

503 COVER (U. HINGE) LY20333-006A LY20333-004A

MAIN BOARD ASSEMBLY <01>

REF NO.

PW MAIN BOARD ASSY YB10271UL-02 YB10271UM-04

IC3004 IC – TC74VHC74FT

Q3005 TRANSISTOR – DTA144EE

Q6201 TRANSISTOR – 2SA1774/QR/-X

Q6202 TRANSISTOR – 2SD1628/FG/-X

Q6203 TRANSISTOR – 2SC4617/QR/-X

D3002 DIODE – DAN222

R3033 MG RESISTOR – NRSA63J-103X

R3035 MG RESISTOR – NRSA63J-103X

R6201 MG RESISTOR – NRSA63J-103X

R6202 MG RESISTOR – NRSA63J-100X

R6203 MG RESISTOR – NRSA63J-103X

R6205 MG RESISTOR – NRSA63J-184X

R6206 MG RESISTOR – NRSA63J-102X

C1631 CAPACITOR – NCB31CK-683X

C4004 TA E CAPACITOR – NBE20GM-336X

C6201 E CAPACITOR – NEA71CM-106X

SW503 SLIDE SWITCH – NSW0092-001X

CN14 CONNECTOR – QGA1201C2-02X

ITEM

MODEL

GR-AXM220U GR-AXM237UM

Note: Mark – is not used.

4.1 BOARD INTERCONNECTIONS

SECTION 4

CHARTS AND DIAGRAMS

4-1

ABCD

Note: How to find the page showing the continuative schematic diagram

Example)

TO REG (Page 4-22): TO REG (Page 4-9):

Refer to the GR-AXM220U service manaul (No. 86526)

Refer to this service manual

EFG

4-2

4.2 CPU SCHEMATIC DIAGRAM

4-3

ABCD

Note: How to find the page showing the continuative schematic diagram

Example)

TO REG (Page 4-22): TO REG (Page 4-9):

Refer to the GR-AXM220U service manaul (No. 86526)

Refer to this service manual

EFG

4-4

+ 14 hidden pages