JVC HR-J692US User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED. No.82952
2003/01
HR-J692US
HR-J692UC
VIDEO CASSETTE RECORDER
82952200301
HR-J692US,HR-J692UC
SPECIFICATION
GENERAL
VIDEO/AUDIO
TUNER
TIMER
ACCESSORIES
TIMER
CANCEL
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700 (MECHANISM ASSEMBLY).
Power requirement : AC 120 V ~, 60 Hz
Power consumption
Power on : 13 W
Power off : 1.5 W
Temperature
Operating : 5°C to 40°C (41°F to 104°F)
Storage : -20°C to 60°C (-4°F to 140°F)
Operating position : Horizontal only
Dimensions (W x H x
D)
: 435 mm x 94 mm x 248 mm
(17-3/16" x3-3/4"x9-3/4")
Weight : 2.7 kg (5.9 lbs)
Format : VHS NTSC standard
Maximum recording
time
SP : 210 min. with ST-210 video cassette
EP : 630 min. with ST-210 video cassette
Signal system : NTSC-type color signal and EIA mono-
chrome signal, 525 lines/60 fields
Recording/Playback
system
: DA-4 (Double Azimuth) head helical
scan system
Signal-to-noise ratio : 45 dB
Horizontal resolution : 230 lines
Frequency range
Normal audio : 70 Hz to 10,000 Hz
Hi-Fi audio : 20 Hz to 20,000 Hz
Input/Output : RCA connectors (IN x 1, OUT x 1)
Tuning system : Frequency-synthesized tuner
Channel coverage
VHF : Channels 2-13
UHF : Channels 14-69
CATV : 113Channels
RF output : Channel 3, 4 or - (off)
(preset to Channel 3 when shipped)
75 ohms, unbalanced
Clock reference : Quartz
Program capacity : 1-year programmable timer/8 programs
Provided accessories : RF cable (F-type)
Infrared remote control unit
Lithium battery -CR2032
Specifications shown are for SP mode unless specified other-
wise. E. & O.E. Design and specifications subject to change with-
out notice.
HR-J692US, HR-J692UC V16D1

HR-J692US
HR-J692UC
1-2 (No.82952)
TABLE OF CONTENTS
Instructions
1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.1 Precautions during Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.2 Safety Check after Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
2 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
2.1 Manually removing the cassette tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
2.2 Removing the major parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
2.3 Emergency display function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
2.4 Service position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
2.5 Mechanism service mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
2.6 Maintenance and inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
3 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
3.1 Before adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
3.2 Mechanism compatibility adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17
3.3 Electrical adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
CHARTS AND DIAGRAMS
BOARD INTERCONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
MAIN (VIDEO/N.AUDIO) SCHEMATIC DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
MAIN (FMA/DEMOD) SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
MAIN (SYSCON) SCHEMATIC DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
MAIN (SW.REG) SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
MAIN (TUNER) SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13
MAIN (FRONT) SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15
MAIN (TERMINAL) SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17
COMPONENT PARTS LOCATION GUIDE <MAIN> LPB10195-001B. . . . . . . . . . . . . . . . . . . . . . . . 2-18
MAIN CIRCUIT BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
REMOTE CONTROLLER SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21
FDP GRID ASSIGNMENT AND ANODE CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21
WAVEFORMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22
VOLTAGE CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23
CPU PIN FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24
SYSTEM CONTROL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25
VIDEO BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-27
AUDIO BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
PARTS LIST
1. EXPLODED VIEW
1.1 PACKING AND ACCESSORY ASSEMBLY <M1>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
1.2 FINAL ASSEMBLY <M2>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
1.3 MECHANISM ASSEMBLY <M4> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
2. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
PACKING AND ACCESSORY ASSEMBLY <M1> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
FINAL ASSEMBLY <M2> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
MECHANISM ASSEMBLY <M4> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
MAIN BOARD ASSEMBLY <03> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
A/C HEAD BOARD ASSEMBLY <12> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
LOADING MOTOR BOARD ASSEMBLY <55>. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

HR-J692US
HR-J692UC
(No.82952)1-3
SECTION 1
SAFETY PRECAUTIONS
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical
codes of the countries in which they are to be sold.However,in order to maintain such compliance, it is equally important to implement
the following precautions when a set is being serviced.
1.1 Precautions during Servicing
(1) Locations requiring special caution are denoted by labels
and inscriptions on the cabinet, chassis and certain parts of
the product.When performing service, be sure to read and
comply with these and other cautionary notices appearing
in the operation and service manuals.
(2) Parts identified by the symbol and shaded ( ) parts
are critical for safety.
Replace only with specified part numbers.
NOTE :
Parts in this category also include those specified to
comply with X-ray emission standards for products
using cathode ray tubes and those specified for
compliance with various regulations regarding spu-
rious radiation emission.
(3) Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
(4) Use specified internal wiring. Note especially:
• Wires covered with PVC tubing
• Double insulated wires
• High voltage leads
(5) Use specified insulating materials for hazardous live parts.
Note especially:
• Insulation Tape
• PVC tubing
•Spacers
• Insulation sheets for transistors
•Barrier
(6) When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Fig.1
(7) Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
(8) Check that replaced wires do not contact sharp edged or
pointed parts.
(9) When a power cord has been replaced, check that 10-15
kg of force in any direction will not loosen it.
Fig.2
(10) Also check areas surrounding repaired locations.
(11) Products using cathode ray tubes (CRTs) In regard to such
products, the cathode ray tubes themselves, the high volt-
age circuits, and related circuits are specified for compli-
ance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the
cathode ray tubes and other parts with only the specified
parts. Under no circumstances attempt to modify these cir-
cuits.Unauthorized modification can increase the high volt-
age value and cause X-ray emission from the cathode ray
tube.
(12) Crimp type wire connector
In such cases as when replacing the power transformer in
sets where the connections between the power cord and
power transformer primary lead wires are performed using
crimp type connectors, if replacing the connectors is un-
avoidable, in order to prevent safety hazards, perform
carefully and precisely according to the following steps.
•Connector part number :E03830-001
•Required tool : Connector crimping tool of the proper
type which will not damage insulated parts.
•Replacement procedure
a) Remove the old connector by cutting the wires at a
point close to the connector.
Important : Do not reuse a connector (discard it).
Fig.3
b) Strip about 15 mm of the insulation from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
Fig.4
c) Align the lengths of the wires to be connected. In-
sert the wires fully into the connector.
Fig.5
d) As shown in Fig.6, use the crimping tool to crimp
the metal sleeve at the center position. Be sure to
crimp fully to the complete closure of the tool.
Fig.6
e) Check the four points noted in Fig.7.
Fig.7
Power cord
cut close to connector
15 mm
Connector
Metal sleeve
1.25
2.0
5.5
Crimping tool
Not easily pulled free Crimped at approx. cente
r
of metal sleev
e
Conductors extended
Wire insulation recessed
more than 4 mm

HR-J692US
HR-J692UC
1-4 (No.82952)
1.2 Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been re-
turned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with
safety standards.
(1) Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set
(RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.).
See Fig.11 below.
(2) Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF ter-
minals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See Fig.11 below.
(3) Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and be-
tween terminals and surrounding metallic parts. See Fig.11 below.
Fig.8
(4) Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs and externally exposed accessible
parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to
measure across both terminals of load Z. See Fig.9 and following Fig12.
Fig.9
(5) Grounding (Class Imodel only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video
in, Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See Fig.10 and grounding specifications.
Fig.10
Fig.11
Fig.12
NOTE :
These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
ab
c
V
A
Externally
exposed
accessible part
Z

HR-J692US
HR-J692UC
(No.82952)1-5
SECTION 2
DISASSEMBLY
2.1 Manually removing the cassette tape
If you cannot remove the cassette tape which is loaded because
of any electrical or mechanical failures, manually remove it by
taking the following steps.
(1) Unplug the power cord plug from the power outlet.
(2) Refer to the disassembly procedure of the VCR and per-
form the disassembly of the major parts before removing
the mechanism assembly. (See Fig. 2-1a)
Fig.2-1a
Fig.2-1b
(3) Unload the pole base assembly by manually turning the
gear of the loading motor until the pole base assembly is
hidden behind the cassette lid. In doing so, hold the tape by
the hand to keep the slack away from any grease. (See
Fig.2-1b )
In case of mechanical failures, while keeping the ten-
sion arm assembly free from tension, pull out the tape
on the pole base assembly. Take the spring(a) of the
pinch roller arm assembly off the hook, and detach it
from the tape.
(4) Remove the screw (a) of the side frame (L/R).
(5) Hold the slack tape and cassette cover together, lift the
cassette tape, top frame, cassette holder and side frames
(L, R) together from the rear and remove them by dis-en-
gaging the hooks (a) and (b).
Fig.2-1c
(6) Take up the slack of the tape into the cassette. This com-
pletes removal of the cassette tape.
Pole base assembly
Tension arm assembly
Pinch roller arm assembly
Direction of unloading
Spring(a)
Screw(a)
Screw(a)
Top frame
Cassette tape Cassette holder
Side frame(R)
Side frame(L)
Hook(a)
Hook(b)

HR-J692US
HR-J692UC
1-6 (No.82952)
2.2 Removing the major parts
2.2.1 How to read the procedure table
This table shows the steps for disassembly of the externally fur-
nished parts and board assemblies. Reverse these steps when
re-assembling them.
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse or-
der.
These numbers are also used as the identification (loca-
tion) No. of parts Figures.
(2) Part name to be removed or installed.
(3) Fig. No. showing procedure or part location.
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
P= Spring, W= Washer, S= Screw, L= Locking tab, SD=
Solder, CN**(WR**)= Remove the wire (WR**) from the
connector (CN**).
Note:
•The bracketed ( ) WR of the connector symbol are
assigned nos. in priority order and do not corre-
spond to those on the spare parts list.
(5) Adjustment information for installation
2.2.2 Disassembly procedure
<Note 2a>
• When reattaching the Front panel assembly, make sure that
the door opener of the Side frame (R) is lowered in position pri-
or to the reinstallation.
• When reattaching the Front panel assembly, pay careful attention
to the switch lever of the Front panel assembly not to make it
touch the switch knob of the Main board assembly from the side.
• When reattaching the Front panel assembly, lift the Cassette
door slightly.
Fig.2-2-2a
<Note 3a>
• Be careful not to damage the connector and wire etc. during
connection and disconnection.
• When connecting the flat wire to the connector, be careful with
the flat wire direction.
<Note 3b>
• When reattaching the Mechanism assembly, secure the
screws (S3a to S3b) in the order of a, b.
<Note 3c>
• When reattaching the Mechanism assembly, be sure to align
the phase of the Rotary encoder on the Main board assembly.
• When reattaching the Mechanism assembly, set the “Mecha-
nism assembling mode”. [See “MECHANISM ASSEMBLY
SERVICE MANUAL (No. 86700)”.]
• When reattaching the Mechanism assembly to the Main board
assembly, take care not to damage the sensors and switch on
the Main board assembly.
<Note 3d>
• When reattaching the Drum assembly, secure the screws (S3c
to S3e) in the order of c, d, e.
Fig.2-2-2b
• When handling the drum assembly alone, hold it by the motor
or shaft. Be careful not to touch other parts, especially the vid-
eo heads. Also take care not to damage the connectors.
Fig.2-2-2c
(1) (2) (3) (4) (5)
Step/
Loc No.
Part Name Fig.
No. Point Note
[1] Top cover 1-3a 4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),
Bracket 2(S1c)
----------------------------------------
Step/
Loc No.
Part Name Fig.
No. Point Note
[1] Top cover 2-2-2d 3(S1a)
[2] Front panel assembly
2-2-2d
2-2-2a
2(S2a), 4(L2a), 3(L2b) < Note 2a >
(L2c)
[3] Mechanism assembly
2-2-2d
2-2-2b
2-2-2c
CN2001(WR3a), < Note 3a >
(S3a), (S3b) <
Note 3b >
(Drum Shield)
(Drum assembly)
(S3f), (L3a) <
Note 3c >
<
Note 3d >
CN1(WR3b),
(S3c), (S3d), (S3e),
[4]
Main board assembly 2-2-2d 2(L4a),(L4b),(L4c)
--------------------------
--------------------------
Door
opener
Side
frame(R) Switch
knob
Switch
lever
<Note 3c>
(S3c)
(S3c)
(S3e) (S3e)
(S3d)
(S3d)
Mechanism
assembly
Drum
assembly
<NOTE>
Attach the Drum assembly appropriately,
since the installation state of the Drum assembly
influences the FM WAVEFORM LINEARITY
greatly.
HOOK
Shaft
Video heads
Motor

HR-J692US
HR-J692UC
(No.82952)1-7
Fig.2-2-2d
JS3001
REAR SIDE
Top cover
(S1a)
a
a
Mechanism
assembly
<Note 3c>
Drum assembly
<Note 3d>
Main board
assembly
(WR3a)
<Note 3a>
(S3c)
<Note 3d> (S3e)
<Note 3d>
(L4b)
(L4c)
(S3d)
<Note 3d>
a
(S2a)
(S3f)
(S3a)
<Note 3b>
a
(S2a)
(S3b)
<Note 3b>
Bottom chassis
The SHIELD CASE of the MAIN PWB
is bent from part A and MECHA
CHASSIS is put.
Must confirm soldering condition as no soldering and
dry soldering at portion of Power cord lead on Main pwb
before attach Main pcb to Bottom chassis.
FFC WIRE remove from the A/C HEAD
BASE and put MECHA UNIT on CHASSIS.
Hang the hook of the T.Board in
hole of CHASSIS.
Front panel
assembly
<Note 2a>
(L2a)
(L2c)
(L2b)
(L2b)
(L3a)
(WR3b)
<Note 3a>
(L2a)
(L4a) (L4a)
Right side Back side
OK NG
CN
electrode side supporting side
NOTE
CN CN
1. Insert direction of FFC WIRE as follows.
2. FFC WIRE and DRUM FPC WIRE should be insert
as follows.
90
Hang the hook of CHASSIS on the PWB.
Hang the hook of CHASSIS on the PWB.
The power code not touch the power supply
PRIMARY side and the mechanics chassis.
Be careful to insert that will not be slanting,and will not be
pushing of PRESS LEVER.
Wire is bent to rear side
Right side
From CAPSTAN MDA
right side
NOTE) HANG THE HOOK OF THE
TOP COVER IN HOLD OF CHASSIS.
NEUTRAL
(WHITE LINE)
NEUTRAL
(WHITE LINE)
PRESS LEVER
FW3001
"A"
b
b
b
c
c
z
z
Accord the position of V gap on R. Encoder and PWB silk " ".
Accord the position of Boss on R. Encoder and PWB silk " ".
For the prevention of the DRUM FPC damage.
When you attach the MECHA UNIT on B. CHASSIS.
Attach the MECHA UNIT after the positioning boss "z" of the
B. CHASSIS is matched to the positioning hole of the MECHA UNIT.
(L3a)
Drum Shield
Switch knob
<Note 2a>
Cassette door
<Note 2a>

HR-J692US
HR-J692UC
1-8 (No.82952)
2.3 Emergency display function
This unit saves details of the last two emergencies as the EMG
history and allows the status of the VCR and the mechanism of
each emergency to be shown both on the display and as OSD in-
formation.
When using the emergency function, it is required to set the VCR
to the Jig RCU mode (the mode in which codes from the Jig RCU
can be received).
Fig.2-3a
2.3.1 Jig RCU mode
This unit uses the following two modes for receiving remote con-
trol codes.
(1) User RCU mode:Ordinary mode for use by the user.
(2) Jig RCU mode: Mode for use in production and servicing.
When using the Jig RCU, it is required to set the VCR to the Jig
RCU mode (the mode in which codes from the Jig RCU can be
received). As both of the above two modes are stored in the EE-
PROM, it is required to set the VCR back to the User RCU mode
each time that an adjustment is made or to check that the neces-
sary operations have been completed.These modes can be set
by the operations described below.
2.3.1.1 Setting the Jig RCU mode
(1) Unplug the power cord plug from the power outlet.
(2) Press and hold the “REC” and “PAUSE” buttons on the
VCR simultaneously, while plugging the power cord plug
into the power outlet.
When the VCR is set to the Jig RCU mode, the symbols
( “ : ” ) in the time display of the FDP are turned off.
2.3.1.2 Setting the User RCU mode
(1) Turn off the power.
(2) Press the “REC” and “PAUSE” buttons of the VCR simulta-
neously. Alternatively, transmit the code “80” from the Jig
RCU.
2.3.2 Displaying the EMG information
The EMG detail of information can be displayed by transmitting
the code "59" from the Jig RCU.
Note:
•The EMG detail information <1><2> show the informa-
tion on the latest EMG.
It becomes “ – – : – – : – –” when there is no latest EMG
record.
EMG display of 7segment LED display model
Fig.2-3-1a
EMG display of FDP display model
Fig.2-3-1b
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the " " ( 3 ) button
after the data code is set.
Jig RCU 0: 00
E: **
1E: **
1: *1
2: *2
3: 34
4: *5
5: *6
6: *7
7: *8
8: *9
9: *1 0
Normal display
EMG content display (Latest) See 2.3.5
EMG content display (Previous) See 2.3.5
EMG detail information <1> See 2.3.6
[Deck operation mode]
EMG detail information <1> See 2.3.6
[Mechanism operation mode]
EMG detail information <1> See 2.3.6
[Mechanism sensor information and Mechanism mode position]
EMG detail information <2> See 2.3.7
[Type of the cassette tape in use <1>]
EMG detail information <2> See 2.3.7
[Winding position of the cassette tape in use]
EMG detail information <2> See 2.3.7
[Type of the cassette tape in use <2> (Winding area)]
EMG detail information <3> See 2.3.8
[Previous deck operation mode]
EMG detail information <3> See 2.3.8
[The deck operation mode of the one before the last]
EMG detail information <3> See 2.3.8
[The deck operation mode of the one prior to one above]
0 : 00 : 00
E:** :**
*1: *2 : 34
*5: *6 : *7
*8: *9 : *10
EMG detail information <2> display See 2.3.7
[Cassette display mode]
EMG detail information <3> display See 2.3.8
[Deck mode history dispaly mode]
EMG detail information <1> display See 2.3.6
[Deck and other mode display mode]
EMG content display (E:Latest:Previous) See 2.3.5
[EMG code display mode]
Normal display (Counter or clock)

HR-J692US
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(No.82952)1-9
<Reference> EMG display of FDP display mode
(1) Transmit the code “59” from the Jig RCU.
The FDP shows the EMG content in the form of “E:**:**”.
(2) Transmit the code “59” from the Jig RCU again.
The FDP shows the EMG detail information <1> in the form
of “ *1: *2 : 34 ”.
(3) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <2> in the form
of “ *5 : *6 : *7 ”.
(4) Transmit the code “59” from the Jig RCU once again.
The FDP shows the EMG detail information <3> in the form
of “*8 : *9 : *10”.
(5) Transmit the code “59” from the Jig RCU once again to re-
set the display.
2.3.3 Clearing the EMG history
(1) Display the EMG history.
(2) Transmit the code “36” from the Jig RCU.
(3) Reset the EMG display.
2.3.4 Details of the OSD display in the EMG display mode
During the EMG display, the OSD shows the data on the deck
mode, etc. The details of the display contents are as follows.
Notes:
•The display is variable depending on the part No. of the
System Control microcomputer (IC3001) built into the
VCR. In the following, refer to the figure carrying the
same two characters as the top two characters of the
part number of your IC.
•The sensor information in the OSD display contents is
partially different from the mechanism sensor informa-
tion in EMG detail information <1>.
[For MN* only]
*FF:Sensor information details
*1 : Deck operation mode at the moment of EMG
*2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of EMG
–4 : Mechanism mode position at the moment of EMG
*5 : Type of the cassette tape in use <1> .
*6 : Winding position of the cassette tape in use
*7 : Type of the cassette tape in use <2> (Winding area)
*8 : Previous deck operation mode at the moment of EMG
*9 : The deck operation mode of the one before the last at
the moment of EMG
*10: The deck operation mode of the one prior to one
above at the moment of EMG
<Example 1> E : 01 : 03
Previous EMG
Latest EMG
No EMG record
<Example 2> E : - - : - -
AA : Deck operation mode (See EMG detail information <1>.)
BB : Mechanism operation mode
(See EMG detail of information <1>.)
CC : Mechanism transition flag
DD : Capstan motor control status
EE : Loading motor control status
FF : Sensor information (See sensor information details.)
GG : Capstan motor speed
HH : Key code (JVC code)
I I : Supply reel winding diameter data, higher 8 bits.
JJ : Supply reel winding diameter data, lower 8 bits.
KK : Mechanism sensor information & mechanism mode posi-
tion(See EMG detail of information <1>.)
LL : Tape speed data, higher 8 bits.
MM : Tape speed data, lower 8 bits.
NN : Cassette tape type <2>, higher 8 bits.
(See EMG detail of information <2>.)
OO : Cassette tape type <2>, lower 8 bits.
(See EMG detail of information <2>.)
PP : General data display area
YY: General data display area
AA BB CC DD EE
FF GG HH I I J J
KK L L MM NN OO
PP QQ RR SS TT
UU VV WW XX YY
<Display>
** h
********
Encoder data
(See Mechanism mode sequence.)
Cassette tab present = 1
Cassette tab broken = 0
Cassette absent = 1
Cassette present = 0
Start sensor
End sensor

HR-J692US
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1-10 (No.82952)
[For *HD only]
*DD:Sensor information details
[For both MN*/HD*]
Mechanism mode sequence
AA : Key code (JVC code)
BB : Deck operation mode(See EMG detail information
<1>.)
CC : Mechanism operation mode (See EMG detail informa-
tion <1>.)
DD : Sensor information (See sensor information details.)
EE : Capstan motor speed (Search, double speed)
FF : Tracking value
GGGG : Cassette tape type <2>, 16 bits.
(See EMG detail information <2>.)
HHHH : Supply reel winding diameter data
I I : Capstan motor speed (FF/REW, double speed)
JJJJ : Tape speed data, lower 8 bits.
KKKK : General data display area
LLLL : General data display area
MMMM : General data display area
AA BB CC
DD EE FF
GGGG HHHH
I I JJJJ
KKKK LLLL MMMM
ROM No.
<Display>
** h
********
Encoder data
(See Mechanism mode sequence.)
Remote pause
End sensor
Start sensor
Cassette tab present = 1
Cassette tab broken = 0
LSA
LSB
LSC
LSD
Encoder output = Low
or
Trerminal - GND = SHORT
Encoder output = High
or
Trerminal - GND = OPEN
Mechanism mode - Encoder data
1110 9876
543
21
No. Position Encoder data
EJECT 0 h = 0000
EJECT1 1 h = 0001
EJECT2 2 h = 0010
ULSTOP 3 h = 0011
UPPER 4 h = 0100
ONSTOP(PLAY) 5 h = 0101
FWD/SS 6 h = 0110
REV/SS 7 h = 0111
OFFSTOP 8 h = 1000
FFREW-BRAKE 9 h = 1001
FFREW A h = 1010
MIDDLE F h = 1111
1
2
3
4
5
6
7
8
9
10
11
12
LSD
LSC
LSB
LSA
GND
12345

HR-J692US
HR-J692UC
(No.82952)1-11
2.3.5 EMG content description
Note:
EMG contents “E08/E09” are for the model with Dynamic Drum (DD).
If the mechanism mode does not change to the next mode within 4 sec-
onds after the loading motor starts rotating in the loading direction, while
the mechanism is in the after-loading position (with the tape up against
the pole base), [E:01] is identified and the power is switched OFF.
However, if the tape loading is not completed within 4 seconds after
the loading motor starts rotating in the loading direction, the tape is
simply unloaded and ejected. No EMG data is recorded in this case.
When the mechanism mode cannot be changed to another mode
even when the loading motor has rotated for more than 4 sec-
onds in the unloading direction, [E:02] is identified and the power
is turned off.
When the falling edje of the take-up reel pulse has not been gen-
erated for more than 4 seconds in the capstan rotating mode,
[E:03] is identified, the pinch rollers are turned off and stopped,
and the power is turned off. In this case, however, the mecha-
nism should be in position after tape loading. Note that the reel
EMG is not detected during Slow/Frame advance operations.
When the drum FG pulse has not been input for more than 3 sec-
onds in the drum rotating mode, [E:04] is identified, the pinch roll-
ers are turned off and stopped, and the power is turned off.
If the cassette does not reach the eject position within about 0.7
seconds after the cassette housing has started the cassette ejec-
tion operation, [E:05] is identified, the drive direction is reversed
to load the tape, the mode is switched to STOP mode with the
pinch roller OFF, and the power is switched OFF.
During the cassette insertion process, the drive direction is reversed
and the cassette is ejected if the tape is not up against the pole
base within about 3 seconds after the start of the cassette pulling-
in operation. If the cassette does not reach the eject position within
about 0.7 seconds after the drive mode reversal operation, [E:05]
is identified and the power is switched OFF immediately.
When the capstan FG pulse has not been generated for more
than 1 second in the capstan rotating mode, [E:06] is identified,
the pinch rollers are turned off and stopped, and the power is
turned off.However, the capstan EMG is not detected in SLOW/
STILL modes.
Note that, if the part number of the System Control IC begins with
"MN" or "M3", the capstan EMG is not detected even during the
FF/REW operation.
When short-circuiting of the SW power supply with GND has lasted
for 0.5 second or more, [E:07] is identified, all the motors are
stopped and the power is turned off.
When DD tilting does not complete in 4 seconds, [E:08] is identi-
fied, the tilt motor is stopped and the power is turned off.
When the DD FG pulse is not generated within 2.5 seconds, [E:09]
is identified, the tilt motor is stopped and the power is turned off.
When the falling edge of the supply reel pulse has not been gen-
erated for more than 10 seconds in the capstan rotating mode,
[E:0A] is identified and the cassette is ejected (but the power is
not turned off). In this case, however, the mechanism should be
in the position after tape loading (with the tape up against the pole
base). Also note that the reel EMG is not detected during Slow/
Frame advance operations.
1. The mechanism is locked in the middle of the mode transition during a tape loading operation.
2.
The mechanism overruns during the tape loading operation because the SYSCON cannot recognize
the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure.
3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in
the middle.)
1. The mechanism is locked in the middle of mode transition.
2. Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejec-
tion is attempted while the tape is still inside the mechanism.) because the SYSCON
cannot recognize the mechanism mode normally. This is due to a cause such as a
rotary encoder failure. (Mechanism position: UPPER)
3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)
1. The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD
SEARCH/FF, etc.) because;
1)The idler gear is not meshed with the take-up reel gear because the mechanism mal-
functions for some reason.
2)
The idler gear is meshed with the take-up reel gear, but incapable of winding due to
too large mechanical load (abnormal tension);
3)The reel is rotating normally but an FG pulse is not generated due to the take-up reel
sensor failure.
2. The supply reel pulse is not generated in the REV transport modes (REV SEARCH/
REW, etc.) because;
1) The idler gear is not meshed with the supply reel gear because the mechanism mal-
functions for some reason.
2) The idler gear is meshed with the supply reel gear, but incapable of winding due to
too large a mechanical load (abnormal tension);
3) The reel rotates normally but the FG pulse is not generated due to a supply reel
sensor failure.
3. Power(SW5V) is not supplied to the reel sensor on the tape winding side.
1. The drum could not start or the drum rotation has stopped due to too large a load on
the tape, because;
1) The tape tension is abnormally high;
2)
The tape is damaged or a foreign object (grease, etc.) adheres to the tape.
2. The drum FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (hall device) of the drum is faulty.
3. The drum control voltage (DRUM CTL V) is not supplied to the MDA.
4. Power (M12V) is not supplied to the drum MDA.
1. The cassette cannot be ejected due to a failure in the drive mechanism of the housing.
2. When the housing load increases during ejection, the loading motor is stopped because
of lack of headroom in its drive torque.
Housing load increasing factors: Temperature environment (low temperature, etc.),
mechanism wear or failure.
3. The sensor/switch for detecting the end of ejection are not functioning normally.
4. The loading motor drive voltage is lower than specified or power (M12V) is not sup-
plied to the motor (MDA).
5. When the user attempted to eject a cassette, a foreign object (or perhaps the user's
hand) was caught in the opening of the housing.
1. The capstan could not start or the capstan rotation has stopped due to too large a load
on the tape, because;
1) The tape tension is abnormally high (mechanical lock);
2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occur-
rence of tape entangling, etc.).
2. The capstan FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (MR device) of the capstans is faulty.
3. The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.
4. Power (M12V, SW5V) are not supplied to the capstan MDA.
1. The SW 5 V power supply circuit is shorted with GND.
2. The SW 12 V power supply circuit is shorted with GND.
1. The absolute value sensor is defective. (The soldered parts have separated.)
2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.)
3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value
sensor.
4.
The absolute value sensor data is not sent to the System Controller CPU.
1. The FG sensor is defective. (The soldered parts have separated.)
2. The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.)
3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.
4. The power (5V) to the sensor is not supplied. (Connection failure/soldering failure)
5. The FG pulse is not sent to the System Controller CPU.
6.
The tilt motor is defective. (The soldered parts have separated.)
7. The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)
8. The tilt motor drive MDA - IC is defective.
9. Auto-recovery of the DD tilting cannot take place due to overrun.
1.
The supply reel pulse is not generated in the FWD transport mode (PLAY/FWD
SEARCH/FF, etc.) because;
1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cassette is cut in
the middle;
2) A mechanical factor caused tape slack inside and outside the supply reel side of the
cassette shell. In this case, the supply reel will not rotate until the tape slack is re-
moved by the FWD transport, so the pulse is not generated until then;
3) The reel is rotating normally but the FG pulse is not generated due to a supply reel
sensor failure.
2. The take-up reel pulse is not generated in the REV transport mode (REV SEARCH/
REW, etc.).
1) REV SEARCH/REW is started when the tape in the inserted cassette has been cut
in the middle;
2) A mechanical factor caused tape slack inside and outside the take-up reel side of
the cassette shell. In this case, the take up will not rotate until the tape slack is
removed by the REV transport, so the pulse will not be generated until that time;
3) The reel is rotating normally but the FG pulse is not generated due to a take-up reel
sensor failure.
3. The power (SW 5V) to a reel sensor is not supplied.
FDP CONTENT CAUSE
Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output channels (without regard
to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:U1] is identified and recorded in the emergency history.
During the period in which the head clog is detected, the FDP shows "U:01" and the OSD repeats the "3 seconds of warning display" and the "7 seconds of
noise picture display" alternately.
EMG code : "E:C1" or "E:U1" / FDP : "U:01" / OSD : "Try cleaning tape." or "Use cleaning cassette."
The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode
than PLAY.
EU1:
Head clog warning
history
E0A: Supply Reel
Pulse EMG
E07: SW Power
Short-Circuit
EMG
E06: Capstan FG
EMG
E05: Cassette Eject
EMG
E04: Drum FG EMG
E03: Take Up Reel
Pulse EMG
E02:
Unloading EMG
E01: Loading EMG
E08: DD Initialized
(Absolute
Position
Sensor) EMG
E09: DD FG EMG

HR-J692US
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1-12 (No.82952)
2.3.6 EMG detail information <1>
The status (electrical operation mode) of the VCR and the status
(mechanism operation mode/sensor information) of the mecha-
nism in the latest EMG can be confirmed based on the figure in
EMG detail information <1> .
[FDP/OSD display] *1 : *2 : 34
Note:
•For EMG detailed information <1>, the content of the
code that is shown on the display (or OSD) differs de-
pending on the parts number of the system control mi-
croprocessor (IC3001) of the VCR. The system control
microprocessor parts number starts with two letters, re-
fer these to the corresponding table.
*1 : Deck operation mode
*2 : Mechanism operation mode
*1 : Deck operation mode at the moment of EMG
*2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of EMG
–4 : Mechanism mode position at the moment of EMG
[Common table of MN* and HD]
00 - Mechanism being initialized
01 00 STOP with pinch roller pressure off (or tape present with P.OFF)
02 01 STOP with pinch roller pressure on
03 - POWER OFF as a result of EMG
04 04 PLAY (Normal playback)
0C 0E REC
10 11 Cassette ejected
20 22 FF
21 - Tape fully loaded, START sensor ON, short FF
22 - Cassette identification FWD SEARCH before transition to FF
(SPx7-speed)
24 26 FWD SEARCH (variable speed) including x2-speed
2C 2E INSERT REC
40 43 REW
42 - Cassette identification REV SEARCH before transition to REW
(SPx7-speed)
44 47 REV SEARCH (variable speed)
4C 4C AUDIO DUB
6C 6E INSERT REC (VIDEO + AUDIO)
84 84 FWD STILL / SLOW
85 85 REV STILL / SLOW
8C 8F REC PAUSE
8D - Back spacing
8E - Forward spacing (FWD transport mode with BEST function)
AC AF INSERT REC PAUSE
AD - INSERT REC back spacing
CC CD AUDIO DUB PAUSE
CD - AUDIO DUB back spacing
EC EF INSERT REC (VIDEO + AUDIO) PAUSE
ED - INSERT REC (VIDEO + AUDIO) back spacing
Display Deck operation mode
MN* HD*
[Table of MN*]
Display Mechanism operation mode
00 Command standby (No command to be executed)
01 Immediate Power OFF after EMG occurrence
02 Loading from an intermediate position during mechanism initialization
03 Unloading due to EMG occurrence during mechanism initialization
04 Ejecting cassette (ULSTOP to EJECT)
05 Inserting cassette (EJECT to ULSTOP)
06 Loading tape (ULSTOP to PLAY)
07 Unloading tape (PLAY to ULSTOP)
08 Transition from pinch roller ON to STOP
09 Transition from pinch roller OFF to STOP (PLAY to OFFSTOP)
0A Transition from pinch roller OFF to STOP at power OFF
0B Transition from pinch roller ON to STOP at power ON
0C Transition to PLAY
0D Transition to Search FF
0E Transition to REC
0F Transition to FWD STILL/SLOW
10 Transition to REV STILL/SLOW
11 Transition to Search REV
12 Transition from FF/REW to STOP
13 Transition to FF
14 Transition to REW
15 Tape end detection processing during loading
16 Short FWD/REV at tape sensor ON during unloading
17 Transition to FF/REW brake mode
[Table of HD*]
Display Mechanism operation mode
00 STOP with pinch roller pressure off
01 STOP with pinch roller pressure on
02 U/L STOP (or tape being loaded)
04 PLAY (Normal playback)
05 PLAY (x1-speed playback using JOG)
0E REC
11 Cassette ejected
22 FF
26 FWD SEARCH (variable speed) including x2-speed
2E INSERT REC
43 REW
47 REV SEARCH
4C AUDIO DUB
6E INSERT REC (VIDEO + AUDIO)
84 FWD STILL/SLOW
85 REV STILL/SLOW
8F REC PAUSE
AF INSERT REC PAUSE
C7 REV SEARCH (x1-speed reverse playback using JOG)
CD AUDIO DUB PAUSE
EF INSERT REC (VIDEO + AUDIO) PAUSE
F0 Mechanism being initialized
F1 POWER OFF as a result of EMG
F2 Cassette being inserted
F3 Cassette being ejected
F4 Transition from STOP with pinch roller pressure on to STOP with pinch
roller pressure off
F5 Transition from STOP with pinch roller pressure on to PLAY
F6 Transition from STOP with pinch roller pressure on to REC
F7 Cassette type detection SEARCH before FF/REW is being executed
F8 Tape being unloaded
F9 Transition from STOP with pinch roller pressure off to STOP with pinch
roller pressure on
FA Transition from STOP with pinch roller pressure off to FF/REW
FB Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)
FC Transition from STOP with pinch roller pressure off to cassette type
detection SEARCH
FD Short REV being executed after END sensor on during unloading
FE Tension loosening being executed after tape loading (STOP with pinch
roller pressure on)
FF Tape being unloaded

HR-J692US
HR-J692UC
(No.82952)1-13
3- : Mechanism sensor information
-4 : Mechanism mode position
2.3.7 EMG detail information <2>
The type of the cassette tape and the cassette tape winding po-
sition can be confirmed based on the figure in EMG detail infor-
mation <2> .
Note:
•EMG detail information <2> is the reference information
stored using the remaining tape detection function of
the cassette tape. As a result, it may not identify cas-
sette correctly when a special cassette tape is used or
when the tape has variable thickness.
*5 : Cassette tape type <1>
Notes:
•Cassette tape type <1> is identified a few times during
mode transition and the identification count is variable
depending on the cassette tape type. If an EMG occurs
in the middle of identification, the cassette tape type
may not be able to be identified.
•If other value than those listed in the above table is dis-
played, the cassette tape type is not identified.
*6 : Cassette tape winding position
The cassette tape winding position at the moment of EMG is dis-
played by dividing the entire tape (from the beginning to the end)
in 21 sections using a hex number from “00” to “14”.
*7 : Cassette tape type <2> (Winding area)
Note:
•The values of cassette tape type <2> in the above table
are typical values with representative cassette tapes.
2.3.8 EMG detail information <3>
Three deck operation modes preceding the deck operation mode
in which the EMG occurs may be confirmed based on the figures
in the EMG information detail <3>. For the contents of the dis-
played information, see the table "Deck operation mode" in sec-
tion "2.3.6 EMG detail information <1>".
[Common table of MN* and HD*]
0- Tab broken ON ON ON
ON
ON
ON
1- Tab broken ON
2- Tab broken ON
3- Tab broken ON OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
ON
OFF
4- Tab present ON
5- Tab present
6- Tab present OFF
ON
7- Tab present OFF
OFF
OFF
OFF
OFF
8- Tab broken ON ON
ON
9- Tab broken ON
ON
ON
A- Tab broken
B- Tab broken OFF
OFF
C- Tab present ON
ON
D- Tab present
E- Tab present OFF
F- Tab present OFF
OFF
OFF
OFF OFF
OFF
OFF
Mechanism sensor informatio n
Display
REC safety SW Start sensor End sensor Mechansim
position sensor
Tab broken = 0 Sensor ON = 0 Sensor ON = 0
Tab present = 1 sensor OFF = 1 Sensor OFF = 1
-0 Not established
-1 EJECT EJECT position
-2 EJECT-EJECT1 Intermodal position
-3 EJECT1 EJECT1 position
-4 EJECT1-EJECT2 Intermodal position
-5 EJECT2 EJECT2 position
-6 EJECT2-ULSTOP Intermodal position
-7 ULSTOP ULSTOP position
-8 ULSTOP-UPPER Intermodal position
-9 UPPER Loading (unloading) tape
-A UPPER-ONSTOP Intermodal position
-B ONSTOP PLAY position
-C PLAY-FWD/SS Intermodal position
-D FWD/SS FWD (FWD Still/Slow) position
-E FWD/SS-REV Intermodal position
-F REV REV (REV Still/Slow) position
-0 REV-OFFSTOP Intermodal position
-1 OFFSTOP Pinch roller OFF position
-2 OFFSTOP-FFREWB Intermodal position
-3 FFREWB FF/REW Brake position
-4 FFREWB-FFREW Intermodal position
-5 FFREW FF/REW position
[Common table of MN* and HD*]
Mechanism
sensor
information
Dis-
play Deck operation mode
Even number
(0, 2, 4, 6, 8,
A, C, E)
Odd number
(1, 3, 5, 7, 9,
B, D, F)
“00” : End of winding
“14” : Beginning of winding
“FF” :Tape position not identified
Display Cassette tape type <1>
00 Cassette type not identified
16 Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified
82 Small reel, thick tape (T-120) identified/thin tape (T-140) identified
84 Large reel (T-0 to T-60) identified
92 Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified
93 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified
C3 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
D3 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
E1 C cassette, thick tape (TC-10 to TC-20) identified
E2 Small reel, thick tape (T-0 to T-100) identified
E9 C cassette, thin tape (TC-30 to TC-40) identified
F1
C cassette, thick tape/thin tape (TC-10 to TC-40) not classified
Display Cassette tape type <2> (Reference) Word data
(Beginning) (End)
00
04 - 08
05 - 06
05 - 0C
06 - 0C
06 - 0C
07 - 08
09 - 0B
0C - 0D
0D - 0F
0E - 10
10 - 12
10 - 13
11 - 14
12 - 14
13 - 14
13 - 14
13 - 14
13 - 14
15 - 16
16 - 17
17 - 18
19 - 1B
Cassette type not identified
C cassette, thick tape TC-10
Small reel, thick tape T-20
C cassette, thick tape TC-20P
C cassette, thin tape TC-40
C cassette, thin tape TC-30
Small reel, thick tape T-40
Small reel, thick tape T-60
Small reel, thick tape T-80(DF-160)
Small reel, thick tape T-90(DF-180)
Small reel, thick tape T-100
Small reel, thin tape T-140
Small reel, thick tape T-120(DF-240)
Small reel, thick tape T-130
Small reel, thin tape T-160
Small reel, thin tape T-210(DF-420)
Small reel, thin tape T-180(DF-360)
Small reel, thin tape T-168
Small reel, thick tape DF-300
Large reel T-20
Large reel T-30
Large reel T-40
Large reel T-60
(0497 - 0506) (0732 - 0858)
(05A9 - 0661)
(0599 - 05FF) (0AA1 - 0C07)
(0623 - 063D) (0C41 - 0CC3)
(0611 - 0638) (0C0C - 0CB2)
(07CC - 08E5)
(09FD - 0B78)
(0C20 - 0DFC)
(0D31 - 0F3E)
(0E43 - 107F)
(10E1 - 120C)
(1073 - 1313)
(1185 - 1429)
(12D3 - 141F)
(1373 - 14C3)
(1357 - 14C0)
(1395 - 14EE)
(13A8 - 14CE)
(1536 - 1618)
(1647 - 175A)
(1759 - 189C)
(1989 - 1B2F)

HR-J692US
HR-J692UC
1-14 (No.82952)
2.4 Service position
This unit has been designed so that the Mechanism and Main
board assemblies can be removed together from the chassis as-
sembly. Before diagnosing or servicing the circuit boards, take
out the major parts from the chassis assembly.
2.4.1 How to set the “Service position”
(1) Refer to the disassembly procedure and perform the disas-
sembly of the major parts before removing the Mechanism
assembly.
(2) Remove the screws that fix the Mechanism assembly to
the Chassis assembly. If any other screws are used to fix
the boards, remove them also.
(3) Remove the combined Mechanism and Main board assem-
blies.
(4) If any other major parts are used, remove them also.
(5) Connect the wires and connectors of the major parts that
have been removed in steps (1) to (4). (Refer to Fig. 2-4-
1a.)
(6) Place the combined Mechanism, Main board and other
board assemblies upside down.
(7) Insert the power cord plug into the power outlet and then
proceed with the diagnostics and servicing of the board as-
sembly.
Notes:
•Before inserting the power cord plug into the power out-
let, make sure that none of the electrical parts are able
to short-circuit between the workbench and the board
assembly.
•For the disassembly procedure of the major parts and
details of the precautions to be taken, see “1.2 Remov-
ing the major parts”.
•If there are wire connections from the Main board and
Mechanism assemblies to the other major parts, be sure
to remove them (including wires connected to the major
parts) first before performing step (2).
•When carrying out diagnosis and repair of the Main
board assembly in the “Service position”, be sure to
ground both the Main board and Mechanism assem-
blies. If they are improperly grounded, there may be
noise on the playback picture or FDP counter display
may move even when the mechanism is kept in an inop-
erative status.
•In order to diagnose the playback or recording of the
cassette tape, set the Mechanism assembly to the re-
quired mode before placing it upside down. If the mech-
anism mode is changed (including ejection) while it is in
an upside down position the tape inside may be dam-
aged.
•For some models, the mechanism and board assem-
blies are attached by connectors only. When carrying
out a diagnosis or repair of the boards in the “Service
position”, make sure that the connectors are not dis-
connected.
Fig.2-4-1a
2.5 Mechanism service mode
This model has a unique function to enter the mechanism into ev-
ery operation mode without loading of any cassette tape. This
function is called the “Mechanism service mode”.
2.5.1 How to set the “Mechanism service mode”
(1) Set the VCR to the Jig RCU mode (the mode in which
codes from the Jig RCU can be received).
(2) Transmit the code “E5” from the Jig RCU.
(3) Release the lug of the Cassette holder and then slide the
Cassette holder toward the direction where the Cassette
holder is loaded by manually.
(4) The cassette holder lowers and, when the loading has
completed, the mechanism enters the desired mode.
When the VCR is set to the Mechanism service mode, the
symbols (“Timer”) in the FDP (LED) are blinked.
2.5.2 How to exit from the "Mechanism service mode"
(1) Unplug the power cord plug from the power outlet.
Main board
assembly
TP2253
A.PB.FM
TP106
PB.FM
TP4001
CTL.P
TP111
D.FF
VR4028
SWITCHING POINT ADJ.

HR-J692US
HR-J692UC
(No.82952)1-15
2.6 Maintenance and inspection
2.6.1 Cleaning
out cleaning of the tape transport system whenever the machine
is serviced.
When the video head, tape guide and/or brush get soiled, the
playback picture may appear inferior or at worst disappear, re-
sulting in possible tape damage.
Note:
•Absolutely avoid sweeping the upper drum vertically as
this will cause damage to the video head.
(1) When cleaning the upper drum (especially the video head),
soak a piece of closely woven cloth with alcohol and while
holding the cloth onto the upper drum by the fingers, turn
the upper drum counterclockwise.
(2) To clean the parts of the tape transport system other than
the upper drum, use a piece of closely woven cloth or a cot-
ton swab soaked with alcohol.
(3) After cleaning, make sure that the cleaned parts are com-
pletely dry before using the cassette tape.
Fig.2-7-1a
2.6.2 Lubrication
With no need for periodical lubrication, you have only to lubricate
new parts after replacement. If any oil or grease on contact parts
is soiled, wipe it off and newly lubricate the parts.
Note:
•See the “mechanism assembly” diagram of the “parts
list” for the lubricating or greasing spots, and for the
types of oil or grease to be used.
2.6.3 Suggested servicing schedule for main components
The following table indicates the suggested period for such ser-
vice measures as cleaning, lubrication and replacement. In prac-
tice, the indicated periods will vary widely according to
environmental and usage conditions. However, the indicated
components should be inspected when a set is brought for ser-
vice and the maintenance work performed if necessary. Also
note that rubber parts may deform in time, even if the set is not
used.
C : Cleaning
X : Inspection or Replacement if necessary
For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700 (MECHANISM AS-
SEMBLY).
Video heads
A/C head
System Parts name Operation hours
1000H 2000H
Tape
transport
Drum assembly C,X X
A/C head C,X C,X
Pinch roller arm assembly C C
Full erase head C C
Tension arm assembly C C
Capstan motor (Shaft) C C
Guide arm assembly C C
Drive
Capstan motor X
Capstan brake assembly X
Main brake assembly X
Belt (Capstan) X X
Loading motor X
Clutch unit X
Worm gear X
Control plate X
Other Rotary encoder X

HR-J692US
HR-J692UC
1-16 (No.82952)
SECTION 3
ADJUSTMENT
3.1 Before adjustment
3.1.1 Precaution
•The adjustments of this unit include the mechanism com-
patibility and electrical adjustments. During the perfor-
mance of this work, be sure to observe the precautions for
each type of adjustment.
•If there is a reference to a signal input method in the signal
column of the adjustment chart, “Ext. S-input” means the
Y/C separated video signal and “Ext. input” means the
composite video signal input.
•Unless otherwise specified, all measuring points and
adjustment parts are located on the Main board.
3.1.2 Required test equipments
• Color (colour) television or monitor
• Oscilloscope: wide-band, dual-trace, triggered delayed sweep
• Signal generator: RF / IF sweep / marker
• Signal generator: stairstep, color (colour) bar [NTSC]
• Recording tape
• Digit-key remote controller(provided)
3.1.3 Required adjustment tools
: Used --- : Not used
3.1.4 Color (colour) bar signal,Color (colour) bar pattern
3.1.5 Switch settings
When adjusting this unit, set the VCR mode and switches
as described below.
• When using the Jig RCU, it is required to set the VCR to the
Jig RCU mode (the mode in which codes from the Jig RCU can
be received). (See "section 2 DISASSEMBLY".)
Fig.3-1-5a Jig RCU [PTU94023B]
• Set the switches as shown below unless otherwise specified
on the relevant adjustment chart. The switches that are not list-
ed below can be set as desired.
If the VCR is not equipped with the functions detailed below,
setup is not required.
3.1.6 Manual tracking mode (Auto tracking ON/OFF) set-
ting
(1) In order to set to the manual tracking mode during tape
playback, press the “SP/EP(LP)”button on the remote con-
trol unit.
• Each press of the button switches the auto tracking ON
or OFF.
• When the manual tracking mode is set, the tracking is
placed at the center position.
(2) Press “channel +/-” to adjust the tracking manually.
Mechanism
compatibility
adjustment
Electrical
adjustment
Roller driver ---
Jig RCU --- ---
Back tension cassette gauge ---
Alignment tape(MHP) ---
Alignment tape(MHP-L)
Roller driver
PTU94002
Back tension cassette gauge
PUJ48076-2
Jig RCU
PTU94023B
Alignment tape
(SP, stairstep, NTSC)
MHP
Alignment tape
(EP, stairstep, NTSC)
MHP-L
AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.
OFF
PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL
VIDEO STABILIZER OFF
TBC ON
Digital 3R ON
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK OFF
White(75%)
100 IRE
40 IRE
Horizontal sync
QI
1V
White(100%)
Yellow Cyan
Green
Magenta
Red
Blue
Burst
40 IRE
White
Yellow
Cyan
Green
Magenta
Red
Blue
Q I Black
White
100%
(75%)
Color(colour) bar signal [NTSC] Color(colour) bar pattern [NTSC]
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the " "( 3 ) button
after the data code is set.
Jig RCU

HR-J692US
HR-J692UC
(No.82952)1-17
3.2 Mechanism compatibility adjustment
Notes:
•Although compatibility adjustment is very important, it
is not necessary to perform this as part of the normal
servicing work. It will be required when you have re-
placed the A/C head, drum assembly or any part of the
tape transport system.
•To prevent damaging the alignment tape in the compat-
ibility adjustment, prepare a cassette tape (for self-re-
cording/playback), perform a test on it by transporting it
and making sure that the tape is not bent by the tape
transport mechanisms such as in the guide rollers.(See
Fig.3-2-2a.)
3.2.1 Tension pole position
Notes:
•This adjustment must be performed every time the ten-
sion band is replaced.
(1) Play back the back tension cassette gauge (A).
(2) Check that the indicated value on the left side gauge is
within the specified value (G).
(3) If the indicated value is not within the specified value (G),
perform the adjustment in a following procedure.(See
Fig.3-2-1a.)
a) Remove the top frame, cassette holder and side
frames (L/R) all together. (Refer to the SERVICE
MANUAL No.86700 [MECHANISM ASSEMBLY].)
b) Rotate the loading motor gear to move the control
plate so that the triangular stamping to the left of the
“P”stamping is aligned with the stamping (a) on the
main deck. This positioning is mode (B1).
c) Adjust by turning the adjustment pin so that the tip of
the tension arm is aligned with the stamping (b) on
the main deck.
d) Rotate the reel disk (S) by about one turn clockwise
and make sure that the round hole of the adjustment
pin is located in the “OK” range. If it is outside this
range, restart the adjustment from the beginning.
After completion of the adjustment, rotate the loading gear
motor to return it to the mode (B2) position.
Fig.3-2-1a
3.2.2 FM waveform linearity
(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe
the V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Make sure that there is no significant level drop of the V.PB
FM waveform caused by the tracking operation, with its
generally parallel and linear variation ensured. Perform the
following adjustments when required. (See Fig. 3-2-2b.)
(5) Reduce the V.PB FM waveform by the tracking operation.
If a drop in level is found on the left side, turn the guide roll-
er of the pole base assembly (supply side) with the roller
driver to make the V.PB FM waveform linear.
If a drop in level is on the right side, likewise turn the guide
roller of the pole base assembly (take-up side) with the
roller driver to make it linear. (See Fig. 3-2-2b.)
(6) Make sure that the V.PB FM waveform varies in parallel
and linearly with the tracking operation again. When re-
quired,
perform fine-adjustment of the guide roller of the
pole base assembly (supply or take-up side).
(7) Unload the cassette tape once, play back the alignment
tape (A1) again and confirm the V.PB FM waveform.
(8) After adjustment, confirm that the tape wrinkling does not
occur at the roller upper or lower limits. (See Fig. 3-2-2a.)
[Perform adjustment step (9) only for the models equipped
with SP mode and EP (or LP) mode.]
[Perform adjustment step (9) only for the models
equipped with SP mode and EP (or LP) mode.]
(9) Repeat steps (1) to (8) by using the alignment tape (A2).
Fig.3-2-2a
Signal (A) • Back tension cassette gauge [PUJ48076-2]
Mode (B1)
(B2)
•PB
• Eject end
Adjustment part (F) • Adjust pin [Mechansim assembly]
Specified value (G) •25 - 51 gf•cm (2.45 - 5 x 10-3 Nm)
OK
NG
ADJUST PIN
TENSION ARM
Stamping(b)
Stamping(a)
CONTROL PLATE
Signal (A1)
(A2)
• Alignment tape(SP, stairstep, NTSC) [MHP]
• Alignment tape(EP,stairstep,NTSC) [MHP-L]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • Guide roller [Mechanism assembly]
Specified value (G) • Flat V.PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]
(a)GUIDE ROLLER
(b)GUIDE POLE
Improper Proper

HR-J692US
HR-J692UC
1-18 (No.82952)
Fig.3-2-2b
3.2.3 Height and tilt of the A/C head
Note:
•Set a temporary level of the height of the A/C head in ad-
vance to make the adjustment easier after the A/C head
has been replaced. (Refer to the SERVICE MANUAL
No.86700 [MECHANISM ASSEMBLY].)
(1) Play back the alignment tape (A).
(2) Apply the external trigger signal to D.FF (E), to observe the
AUDIO OUT waveform and Control pulse waveform at the
measuring points (D1) and (D2) in the ALT mode.
(3) Set the VCR to the manual tracking mode.
(4) Adjust the AUDIO OUT waveform and Control pulse wave-
form by turning the screws (1), (2) and (3) little by little until
both waveforms reach maximum. The screw (1)
and (3) are for adjustment of tilt and the screw (2) for azi-
muth.
Fig.3-2-3a
3.2.4 A/C head phase (X-value)
(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe the
V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Loosen the screws (4) and (5), then set the Roller driver to
the innermost projected part of the A/C head. (See Fig. 3-
2-4a.)
(5) Rotate the roller driver so that the A/C head comes closest
to the capstan. From there, move the A/C head back grad-
ually toward the drum until the point where the FM wave-
form is maximized for the second time, and then
tighten the screws (4) and (5) temporarily.
(6) Play an alignment tape (A2) and set to the manual-tracking
mode.
(7) Fine-adjust A/C head base position to maximize the FM
waveform, and then tighten the screws (4) and (5) firmly.
(8) Play alignment tapes (A1) and (A2) and confirm that the FM
waveforms are maximized when the tracking is at the cen-
ter position.
Fig.3-2-4a
Fig.3-2-4b
Signal (A) • Alignment tape(SP, stairstep, NTSC) [MHP]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1)
(D2)
• AUDIO OUT terminal
• TP4001 (CTL. P)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • A/C head [Mechanism assembly]
Specified value (G) • Maximum waveform
Improper waveform variation
A
B
CD
Up Down
Guide roller
(supply side)
Roller driver
Proper waveform variation
Head base
A/C head
AUDIO OUT
CTL.P
(1)
(2)
(3)
Signal (A1)
(A2)
• Alignment tape(SP, stairstep, NTSC) [MHP]
• Alignment tape(EP,stairstep,NTSC) [MHP-L]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • A/C head base [Mechanism assembly]
Specified value (G) • Flat V.PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]
Head base
Roller driver
To the capstan
To the drum
Toward the capstan
Toward the drum
Screw (5)
Screw (4)
A/C head
Alignment tape
[SP, stairstep]
played with the
SP head
Alignment tape
[EP(LP), stairstep]
played with the
EP(LP) head
Drum side Control head position Capstan side
X-value adjustment point
Maximum
Waveform output

HR-J692US
HR-J692UC
(No.82952)1-19
3.3 Electrical adjustment
Note:
The following adjustment procedures are not only necessary
after replacement of consumable mechanical parts or board
assemblies, but are also provided as references to be referred
to when servicing the electrical circuitry.
In case of trouble with the electrical circuitry, always begin a
service by identifying the defective points by using the measur-
ing instruments as described in the following electrical adjust-
ment procedures. After this, proceed to the repair,
replacement and/or adjustment. If the required measuring in-
struments are not available in the field, do not change the ad-
justment parts (variable resistor, etc.) carelessly.
3.3.1 Servo circuit
3.3.1.1 Switching point
(1) Play back the signal (A1) of the alignment tape (A2).
(2) Apply the external trigger signal to D.FF (E) to observe the
VIDEO OUT waveform and V.PB FM waveform at the
measuring points (D1) and (D2).
(3) Set the VCR to the manual tracking mode.
(4) Adjust tracking so that the V.PB FM waveform becomes
maximum.
(5) Adjust the adjustment point (F) so that the value of the
switching point becomes identical to the adjustment value
(G).
Fig.3-3-1a Switching point
Signal (A1)
(A2)
• Stairstep signal
• Alignment tape(EP,stairstep,NTSC) [MHP-L]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1)
(D2)
• VIDEO OUT terminal (75 ohm terminated)
• TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • R4028
Specified value (G) • 6.5 ± 0.5H
V.sync
Trigger point
Switching point
V. rate

(No.82952)
0301WPC
Printed in Japan
HR-J692US
HR-J692UC
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
www.jvcservice.com(US Only)
JVC CANADA INC.
Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 [phone]