JVC GR-AXM237UM Service Manual

Compact vhs
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COMPACT VHS CAMCORDER
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
direct recording
Conforms to VHS standard
Cassette
:
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
(–4°F to 122°F)
Weight
: Approx. 890 g (2.0 lbs)
GR-AXM237UM
Dimensions
: 198 mm x 119 mm x 99 mm
(W x H x D)
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
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.
This service manual is made from all recycled paper.
©
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
Power consumption : 23 W
(7-13/16" x 4-11/16" x 3-15/
Output
16") (with the LCD monitor
Charge
closed and with the view-
VTR
finder fully tilted downward)
Charging system
Dimensions
power zoom lens with auto
(W x H x D)
iris and macro control, filter
diameter 40.5 mm
Weight
0.5" black/white CRT
Dimensions
(W x H x D)
LCD panel/TFT active matrix
Weight
system
Accessory
Optional Accessories
jack (compatible with
RC-5325 plug)
•Battery Packs BN-V12U, BN-V20U, BN-V856U
, 75 Ω unbalanced,
p-p
(
)
•Car Battery Charger BH-V3U
analog output
•Battery Charger BH-VC10U
(via Video output connector)
•Audio/Video Cable
•Car Battery Cord AP-V7U
output (via Audio output
•Compact VHS (
connector)
•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.
50 Hz/60 Hz
: DC 8.5 V
, 1.3 A
: DC 6.3 V
, 1.8 A
: Constant current, peak
detection, timer controlled
: 125 mm x 42 mm x 68 mm
(4-15/16" x 1-11/16" x
2-11/16")
: Approx. 270 g (0.6 lbs)
Cassette Adapter C-P7U
: 188 mm x 25 mm x 104 mm
(7-7/16" x 1" x 4-1/8")
: Approx. 240 g (0.53 lbs)
: "AA (R6)"-size battery x 1
) Cassettes TC-40/30/20
No. 86544
February 2000

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Table of Contents
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Summary of Contents for JVC GR-AXM237UM

  • Page 1: Specifications

    Operating humidity : 35% to 80% Some accessories are not available in some areas. Storage temperature : –20°C to 50°C Please consult your nearest JVC dealer for details Power requirement : AC 110 V to 240 V`, (–4°F to 122°F) on accessories and their availability.
  • Page 2: Table Of Contents

    VTR DSP SCHEMATIC DIAGRAM ..........................4-5 REGULATOR SCHEMATIC DIAGRAM ........................4-7 MAIN CIRCUIT BOARD ............................. 4-9 PARTS LIST FINAL ASSEMBLY <M2> ............................5-1 The following table indicate main different points between models GR-AXM220U and GR-AXM237UM. MODEL GR-AXM220U GR-AXM237UM ITEM DC LIGHT...
  • Page 3 MONITOR ASSEMBLY <M5> MODEL REF NO. GR-AXM220U GR-AXM237UM ITEM MONITOR ASSY LYH20126-004A LYH20126-011A COVER (MONI) ASSY LY20482-004A LY20482-011B 502A WINDOW LY31295-004A LY31295-009B COVER (U. HINGE) LY20333-006A LY20333-004A MAIN BOARD ASSEMBLY <01> MODEL REF NO. GR-AXM220U GR-AXM237UM ITEM MAIN BOARD ASSY...
  • Page 4: Charts And Diagrams

    SECTION 4 CHARTS AND DIAGRAMS BOARD INTERCONNECTIONS...
  • Page 5 Note: How to find the page showing the continuative schematic diagram Example) TO REG (Page 4-22): Refer to the GR-AXM220U service manaul (No. 86526) TO REG (Page 4-9): Refer to this service manual...
  • Page 6: Cpu Schematic Diagram

    CPU SCHEMATIC DIAGRAM...
  • Page 7 Note: How to find the page showing the continuative schematic diagram Example) TO REG (Page 4-22): Refer to the GR-AXM220U service manaul (No. 86526) TO REG (Page 4-9): Refer to this service manual...
  • Page 8: Vtr Dsp Schematic Diagram

    VTR DSP SCHEMATIC DIAGRAM...
  • Page 9 Note: How to find the page showing the continuative schematic diagram Example) TO REG (Page 4-22): Refer to the GR-AXM220U service manaul (No. 86526) TO REG (Page 4-9): Refer to this service manual...
  • Page 10: Regulator Schematic Diagram

    REGULATOR SCHEMATIC DIAGRAM...
  • Page 11 Note: How to find the page showing the continuative schematic diagram Example) TO REG (Page 4-22): Refer to the GR-AXM220U service manaul (No. 86526) TO REG (Page 4-9): Refer to this service manual...
  • Page 12: Main Circuit Board

    MAIN CIRCUIT BOARD FOIL SIDE (B)
  • Page 13 4-10...
  • Page 14 COMPONENT PARTS LOCATION GUIDE (MAIN) REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION CAPACITOR C2004 C4212 C6133 IC7802 C3505 C101 C2005 C4213 C6134 IC7803 C3506 IC8001 C102 C2009 C3507 C4214 C6135 IC8002 C103 C2010 C3508 C4251 C6141...
  • Page 15 REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION REF.No. LOCATION Q3101 R138 R4519 R7801 R2025 R4004 Q3102 R139 R4520 R7802 R2026 R4006 Q3103 R140 R5201 R7803 R2027 R4007 Q3104 R141 R5202 R7804 R2029 R4008 Q3105 R142 R5211 R7808 R2061 R4009 Q3106...
  • Page 16 COMPONENT SIDE (A) 4-13...
  • Page 17 4-14...
  • Page 18: Parts List

    SECTION 5 PARTS LIST SAFETY PRECAUTION Parts identified by the ! symbol are critical for safety. Replace only with specified part numbers. < > FINAL ASSEMBLY 101D 101C 101D 101N 101K 101E 101J 101B 101E 101A 101L 137E 137A 101G 137F MAIN <01>...
  • Page 19 ELECTRONIC VIEWFINDER <M4> MECHANISM <M3> 152A 150A 137B 137H 137D 137D 137H 106J 107B 106J 107A 107B 106K LABEL MONITOR <M5> 109B 109A 109C 109E 109C 109D...
  • Page 20 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 21 VICTOR COMPANY OF JAPAN, LIMITED S40894 VIDEO DIVISION Printed in Japan...

Table of Contents