Philips VR540/39 User manual

Service Manual
Service
Service
Service
Video Cassette Recorder
Contents
Chapter
Schematic Diagrams and CBA's
Exploded Views
Mechanical and Electrical Parts Lists
Sec. 1:
Survey of versions:
/02 PAL B/G
/07 PAL I, Ireland
/16 PAL B/G, Spain
/39 SECAM L,L' & PAL B/G
/58 PAL/SECAM B/G, D/K
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified
be used.
Published by BK 2003 Video Service Department Printed in Japan c Copyright reserved Subject to modification GB 3103 785 22170
For technical data reference is made to the Service Manual of VR540/02/07/16
3103 785 22160. The present manual states only the differences.
VR540/39
VR540/58
VR740/02
VR740/07
VR740/16
VR740/58
VR742/16
VR742/39
VR742/58

1-5-3 HE473IB
OPERATING CONTROLS AND FUNCTIONS
[ VR540/ (39,58)]
The remote control
1 2 3
4 5 6
7 8 9
P
0
P
P
STILL
STOP
MENU
REW FWD
PLAYSTATUS/EXIT CLEAR
VCR TV
REC STANDBY/ON
PROGVOL
INDEXMUTE SLOW SYSTEM
AUDIO
Buttons for VCR feature only
To operate the VCR with the remote control.
To delete last entry/Clear programmed recording
(TIMER).
To record the TV channel selected at this moment or
press repeatedly to start a One-Touch Recording.
To stop the tape and slow a still picture.
To select the programme number.
During normal or slow motion playback, press to adjust the
tracking.
In combination with 0 /1:to search for previous or
next recording on the cassette.
To view the picture in slow motion.
To change stereo sound and 2nd language.
To change the video (colour) system.
To call up main menu of VCR.
When tape playback is stopped, press to fast
forward the tape at high speed. During playback, press to fast
forward the tape while the picture stay on the screen. To store or
confirm entry in the menu.
When tape playback is stoped, press to rewind
the tape at high speed. During playback, press to rewind the
tape while the picture stay on the screen.To return the cursor in
the menu.
To play a tape, select an item in the menu of VCR.
To stop the tape, select an item in the menu of
VCR.
STOP C- L
PLAY B- K
REW
-
-
FWD
MENU
SYSTEM
AUDIO
SLOW
INDEX
PROG P–PROG P+
STILL
REC
CLEAR
VCR
Buttons with TV feature
To call up additional TV functions.
To switch VCR or Philips TV on or off, interrupt menu
function.
To access or remove the VCR’s on-screen status display.
To exit on-screen menus. Or, to access or remove a status display or menu
of Philips TV.
Press to select channels at VCR or Philips TV.
To eliminate the TV’s sound. Press again to restore the volume.
To adjust the TV’s volume.
VOL 5–
VOL +
MUTE
0..9
STATUS/EXIT
STANDBY/ON y
y
TV
Press before pressing a VCR-feature key.
You can use this remote control to operate some func-
tions of Philips TVs. Press before pressing a TV-
feature key.
TV
VCR

1-5-4 HE473IB
Front of the device
Back of the set
RF OUT
AV2 (DECODER) AV1 (TV)
AERIAL
FWDPLAYREWSTOP/EJECTRECORDPROGRAMMESTANDBY/ON
To connect a satellite receiver, decoder, video recorder,etc.
To connect the TV set(programme number).
To connect the aerial cable.
To connect the TV set.
RF OUT
AERIAL
AV1(TV)
AV2(DECODER)
To switch off or on, interrupt a function.
To select the programme number. During normal or slow
motion playback, press to adjust the tracking.
To record the TV channel selected at this moments.
When tape playback is stopped, press to fast forward the tape at hight speed. During
playback, press to fast forward the tape while the picture stay on the screen.
When tape playback is stoped, press to rewind the tape at hight speed. During playback,
press to rewind the tape while the picture stay on the screen.
To play a tape.
To stop the tape and eject the cassette.
STOP/EJECT
PLAY
REW
FWD
RECORD
PROGRAMME-PROGRAMME+
STANDBY/ON

1-5-5 HE473IB
The remote control
1 2 3
4 5 6
7 8 9
P
0
P
P
STILL
STOP
MENU
REW FWD
PLAYSTATUS/EXIT CLEAR
VCR TV
REC STANDBY/ON
PROGVOL
INDEXMUTE SLOW SYSTEM
TURBO
TIMER SV / V+ AUDIO
Buttons for VCR feature only
To operate the VCR with the remote control.
To delete last entry/Clear programmed
recording (TIMER).
To record the TV channel selected at this
moment or press repeatedly to start a One-Touch
Recording.
To stop the tape and slow a still picture.
To select the programme
number. During normal or slow motion playback, press
to adjust the tracking.
In combination with / :to search for
previous or next recording on the cassette.
To view the picture in slow motion.
To change stereo sound and 2nd language.
Doesn’t
To change the video (colour) system.
work in these
[ VR740/ (02, 07, 16), VR742/ (16) ]
[ VR740/ (58), VR742/ (39, 58) ]
models.
To programme a recording with the
function TURBO TIMER.
To make a TIMER programming with
SHOWVIEW system.
To call up main menu of VCR.
To play a tape, select an item in the menu
of VCR.
To stop the tape, select an item in the
menu of VCR
STOP -
PLAY -
MENU
SV/V+
TURBO TIMER
SYSTEM
AUDIO
SLOW
INDEX
PROG P–PROG P+
STILL
REC
CLEAR
VCR
When tape playback is stopped, press to fast forward the tape at high
speed. During playback, press to fast forward the tape while the picture stay on the
screen. To store or confirm entry in the menu.
When tape playback is stoped, press to rewind the tape at high
speed. During playback, press to rewind the tape while the picture stay on the
screen.To return the cursor in the menu.
Buttons with TV feature
To call up additional TV functions.
To switch VCR or Philips TV on or off, interrupt menu function.
To access or remove the VCR’s on-screen status display. To exit
on-screen menus. Or, to access or remove a status display or menu of Philips TV.
Press to select channels at VCR or Philips TV.
To mute the TV’s sound. Press again to restore the volume.
To adjust the TV’s volume.
VOL –
VOL +
MUTE
0..9
STATUS/EXIT
STANDBY/ON
TV
REW -
FWD -
Press before pressing a VCR-feature key.
You can use this remote control to operate some functions of
Philips TVs. Press before pressing a TV-feature key.
TV
VCR
[ VR740/ (02, 07, 16, 58), VR742/ (16, 39, 58) ]

1-5-6 HE473IB
Front of the device
Back of the set
FWDPLAYREWSTILL
STOP/EJECT
RECORD
PROGRAMME
STANDBY/ON PWR. REC
RF OUT
AV 2 (DECODER) AV 1 (TV)
AERIAL
AUDIO
OUTPUT
L
R
To switch off or on, interrupt a function.
To select the programme number. During
normal or slow motion playback, press to adjust the tracking.
To record the TV channel selected at this moments.
When tape playback is stopped, press to fast forward the tape at high speed.
During playback, press to fast forward the tape while the picture stay on the screen.
When tape playback is stoped, press to rewind the tape at hight speed. During
playback, press to rewind the tape while the picture stay on the screen.
To play a tape.
To stop the tape and eject the cassette.
To stop the tape and slow a still picture.
STILL
STOP/EJECT
PLAY
REW
FWD
RECORD
PROGRAMME-PROGRAMME+
STANDBY/ON
To connect a HIFI-set.
To connect a satellite receiver, decoder, video recorder,etc.
To connect the TV set.
To connect the aerial cable.
To connect the TV set.
RF OUT
AERIAL
AV1(TV)
AV2(DECODER)
AUDIO OUTPUT L R

1-6-3 HE473SNA
SIGNAL NAME ABBREVIATIONS
[ VR540/ (39, 58), VR740/ (02, 07, 16, 58), VR742/ (16, 39, 58) ]
Signal Name Function
4.43MHz 4.43MHz Clock
8POUT-1 SCART 1 8Pin Output Control
Signal
8POUT-2 SCART 2 8Pin Output Control
Signal
A-COM Audio Head Common
A-IN 1, 2 Audio Signal Input 1, 2
A-MODE Hi-Fi Tape Detection Signal
A-MUTE-H Audio Mute Control Signal
(Mute = “H”)
A-OUT 1, 2 Audio Signal Output 1, 2
A-PB/REC Normal Audio Play Back/Record
Signal
AE-H Audio Erase Head
AFC Automatic Frequency Control
Signal
AGC IF AGC Control Signal
AL+12/+20.5V Always +12V/+20.5V with AC Plug
Connected
AL+44V Always +9V with AC Plug
Connected
AL+5V Always +5V with AC Plug
Connected
AL+9V Always +9V with AC Plug
Connected
AMPC CTL AMP Connected Terminal
AMPVcc AMPVcc
AMPVREF
OUT V-Ref for CTL AMP
AMPVREFIN V-Ref for CTL AMP
AVcc A/D Converter Power Input/
Standard Voltage Input
C-CONT Capstan Motor Control Signal
C-F/R Capstan Motor FWD/REV Control
Signal (FWD=”L”/REV=”H”)
C-FG Capstan Motor Rotation Detection
Pulse
C-POW-SW Capstan Power Switching Pulse
C-POWER-
SW Capstan Power Switching Pulse
C-ROTA Color Phase Rotary Changeover
SIgnal
C-SYNC Composite Synchronized Pulse
C-SYNC Composite Synchronized Pulse
CLKSEL Clock Select (GND)
COLOR-IN
SECAM or MESECAM Chroma
Video Input Signal at Super
Impose
CTL (+) Playback/Record Control
Signal (+)
CTL (-) Playback/Record Control
Signal (-)
CTLAMPout To Monitor for CTL AMP Output
D-CONT Drum Motor Control Signal
D-PG Drum Motor Pulse Generator
D-REC-H Delayed Record Signal
D-V- SYNC Dummy V-sync Output
DAVN-L VPS/PDC Data Receive = “L”
DRV-CLK LED Clock Driver IC Control Clock
DRV-DATA LED Clock Driver IC Control Data
DRV-STB LED Clock Driver IC Chip Select
Signal
END-S Tape End Position Detect Signal
FE-H GND Ground for Full Erase Head
FF/REW-L CTL Amp Gain Switching Signal
(FF/REW=”L”)
FSC-IN
[4.43MHz] 4.43MHz Clock Input
FTV-IN Comparator Input of Video Signal
for Follow TV
H-A-COMP Head Amp Comparator Signal
H-A-SW Video Head Amp Switching Pulse
Hi-Fi-A (L) Hi-Fi Audio Head (L)
Hi-Fi-A (R) Hi-Fi Audio Head (R)
Hi-Fi-COM Hi-Fi Audio Head Common
HiFi-H-SW HiFi Audio Head Switching Pulse
HLF LPF Connected Terminal (Slicer)
I2C BUS- SCL I2C BUS Control Clock
I2C BUS- SDA I2C BUS Control Data
Signal Name Function

1-6-4 HE473SNA
JK1-8P-OUT SCART 8Pin Output Control
Signal
KEY-1 Key Scan Input Signal 1
KEY-2 Key Scan Input Signal 2
LD-SW Deck Mode Position Detector
Signal
LINE MUTE Audio Mute Control Signal
LINK-IN Easy Link Data Input
LM-FWD/REV Loading Motor Control Signal
LP LP
MOD-A Modulator Audio Output Signal
N-A-PB Normal Audio Playback
N-A-REC Normal Audio Recording
OSCIN Clock Input
for letter size
OSCOUT Clock Output for letter size
OSD-V-IN OSD Video Signal Input
OSD-V-OUT OSD Video Signal Output
OSDVcc OSDVcc
P-DOWN-L Power Voltage Down Detector
Signal
P-OFF-H Power Off at High
P-ON+15V +15V at Power-On Signal
P-ON+32V +32V at Power-On Signal
P-ON+5V +5V at Power-On Signal
P-ON-H Power On Signal at High
P80/C P80/C Terminal
PB-H-OUT Playback Signal Output at High
PG-DELAY Video Head Switching Pulse
Signal Adjusted Voltage
POW-SAF P-ON Power Detection Input
Signal
REC-SAF-SW
Recording Safety SW Detect (With
Record tab="L"/With out Record
tab="H")
REMOCON-IN Remote Control Sensor
RESET System Reset Signal (Reset=”L”)
RESET +5V +5V at System Reset Signal
RF-SW Video Head Switching Pulse
RGB-
THROUGH
SCART 2 RGB Through Control
Signal
S-REEL Supply Reel Rotation Signal
Signal Name Function
SC2-IN Input Signal from Pin 8 of SCART2
SECAM-C-IN SECAM Chroma Signal Input
SECAM-FM-
OUT SECAM FM Signal Output
SECAM-H SECAM Mode at High
SIF Intermediate Frequency
ST-S Tape Start Position Detector
Signal
T-REEL Take Up Reel Rotation Signal
TIMER+5V +5V at Timer
TRICK-H Special Playback = “H” in SECAM
Mode
TU-AUDIO Tuner Audio Input Signal
TU-VIDEO Tuner Video Input Signal
V-ENV Video Envelope Comparator
Signal
V-IN 1, 2 Video Signal Input 1, 2
V-OUT 1, 2 Video Signal Output 1, 2
Vcc Vcc
VIDEO Video Signal
Vss Vss(GND)
X-IN Main Clock Input
X-OUT Main Clock Input
XC-IN Sub Clock
XC-OUT Sub Clock
Signal Name Function

1-7-4 HE480DC
CABINET DISASSEMBLY INSTRUCTIONS
[ VR740/ (02, 07, 16, 58), VR742/ (16, 39, 58) ]
1. Disassembly Flowchart
This flowchart indicates the disassembly steps to gain
access to item(s) to be serviced. When reassembling,
follow the steps in reverse order. Bend, route, and
dress the cables as they were originally.
2. Disassembly Method
(1): Identification (location) No. of parts in the figures
(2): Name of the part
(3): Figure Number for reference
(4): Identification of parts to be removed, unhooked,
unlocked, released, unplugged, unclamped, or
desoldered.
P=Spring, L=Locking Tab, S=Screw,
CN=Connector
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g. 2(S-2) = two Screws (S-2),
2(L-2) = two Locking Tabs (L-2)
(5): Refer to “Reference Notes.”
Reference Notes
CAUTION: Locking Tabs (L-1) and (L-2) are fragile.
Be careful not to break them.
1. Remove five Screws (S-2), four Screws (S-3) and
Screw (S-4). Then, slowly lift the VCR Chassis Unit
(Deck Assembly, Jack CBA and Main CBA) up.
2. When reassembling, solder wire jumpers as shown
in Fig. 5.
3. Before installing the Deck Assembly, be sure to
place the pin of LD-SW on Main CBA as shown in
Fig. 6. Then, install the Deck Assembly while align-
ing the hole of Cam Gear with the pin of LD-SW,
the shaft of Cam Gear with the hole of LD-SW as
shown in Fig. 6.
ID/
LOC.
No.
PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
[1] Top Case 1 7(S-1) -
[2] Front
Assembly 2 *3(L-1),*4(L-2) -
[3]
VCR
Chassis
Unit
3 5(S-2), 4(S-3), (S-4) 1
[4] Jack CBA 4 Desolder, (S-5) -
[5] Deck
Assembly 5,6 2(S-6), Desolder 2,3
[6] Main CBA 5 (L-3) -
[7] Function
CBA 5 Desolder (CN505) -
[8] Cylinder
Shield 52(S-7) -
[9] Rear
Panel 5 ---------- -
↓
(1)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
[5] Deck Assembly
[4] Jack CBA
[1] Top Case
[2] Front Assembly
[3] VCR Chassis Unit
[6] Main CBA [8] Cylinder Shield
[7] Function CBA
[9] Rear Panel
[1] Top Case
(S-1)
(S-1)
(S-1)
Fig. 1

1-7-5 HE480DC
(L-2)
(L-1)
[2] Front
Assembly (L-2)
Fig. 2
(S-2)
(S-2)
(S-4)
(S-2)
(S-2)
(S-3)
(S-3)
[3]VCR
Chassis Unit
(S-3)
(S-3)
Fig. 3
(S-5)
[4] Jack CBA
Desolder
Fig. 4

1-7-6 HE480DC
[6] Main CBA
(S-6)
(S-6)
(S-7)
[5] Deck Assembly
FE Head
Cylinder Assembly
AC Head
Assembly
TOP VIEW
From
FE Head
From
Cylinder
Assembly
From
AC Head
Assembly
Lead with
blue stripe
Lead with
blue stripe
Desolder
from bottom
Lead with
blue stripe
From
Capstan Motor
Assembly
Lead connections of Deck Assembly and Main CBA
Printing
side
[8] Cylinder Shield
[7] Function CBA
CN505
(Desolder
from bottom)
[9] Rear Panel
(L-3)
Fig. 5
LD-SW Pin
Hole
Hole
Shaft
Cam Gear
[6] Main CBA
[5] Deck Assembly
[6] Main CBA
SW507
LD-SW
Pin
Fig. 6

M
M
LOADING
MOTOR
CYLINDER ASSEMBLY CAPSTAN MOTOR
DRUM
MOTOR
PG
SENSOR
CONTROL
HEAD
CL287
5 5CTL(+)
6 6CTL(-)
CL504
AC HEAD ASSEMBLY
MAIN CBA
KEY- 2
C-CONT
C-FG
D-PG
ST-S
T-REEL
C-F/R
KEY- 1
REMOCON-IN
CTL(+)
RESET
FTV-IN
REC-SAF-SW
PG-DELAY
CTL(-)
D-V SYNC
D-REC-H
RF-SW
H-A-SW
C-ROTA
END-S
IC561
(FIP DRIVER)
14
90
87
94
95
76
10
4
80
34
78
2
13
15
18
33
16
31
8
7
RS501
REMOTE
SENSOR
LM-FWD/REV
81
D-CONT77
(DECK ASSEMBLY)
Servo/System Control Block Diagram
BLOCK DIAGRAMS
T-REEL
TU-VIDEO
FROM
VIDEO
BLOCK V-IN1
Q771,
Q772
Q501
Q562
Q563
Q564
Q565
DRV-DATA
DRV-STB
DRV-CLK
FP561
FIP
RESET
Q503
S-REEL79
SW-POINT
AL+5V
VR501
TIMER+5V
AND
S-REEL
PS503TP506
IIC-BUS SDA
IIC-BUS SDA
IIC-BUS SCL
A-MUTE-H
IIC-BUS SDA
IIC-BUS SCL
Hi-Fi-H-SW
A-MODE
A-MUTE-H
Hi-Fi-H-SW
A-MODE
H-A-COMP
17 V-ENV
6
P-ON-H
C-POW-SW
P-ON-H
C-POW-SW
P-DOWN-L 67
66
86 P-DOWN-L
C-SYNC
58
SW506
FROM/TO
VIDEO BLOCK
FROM/TO
Hi-Fi AUDIO
BLOCK
TO
AUDIO BLOCK
1-9-11 1-9-12 HE473BLS
SDA
SDA
SCL
SCL
TU701(TUNER UNIT)
IC503 (MEMORY)
72
32
19
83
IIC-BUS SCL
D-V SYNC
D-REC-H
RF-SW
DAVN-L
20DAVN-L
TRICK-H
65TRICK-H
H-A-SW
C-ROTA
IIC-BUS SDA
H-A-COMP
V-ENV
C-SYNC
SECAM-H
61
SECAM-H
IIC-BUS SCL 71
3
5
SDA
SCL
12
11
CAS-LED
TIMER-LED
REC-LED
G1
G2
G3
G4
G5
G6
S1
S2
S7
S8
S9
S10
26
25
24
POWER-LED 23
D565 REC
D564 TIMER
D563 CAS
D562 POWER
D561 STAND-BY
+5V
LD-SW9
AL+12V/+20.5V
P-ON+15V
AL+5V
AL+5V
SW507
AL+12V
P-ON+5V
LD-SW
AL+5V
D502
S-LED
FROM/TO
POWER
SUPPLY
BLOCK
LINE-MUTE
KEY
SWITCH
KEY
SWITCH
TP507
SENS-INH
M
CAPSTAN
MOTOR
" " = SMD
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.
23
22
21
2
22
1
20
13
14
16
17
19
18
7
8
IC561 (LED DISPLAY)
IC501
(SERVO/SYSTEM CONTROL)
IC771
(COMPARATOR)
DRV-DATA
SW509
ST/EJ
DRV-STB
DRV-CLK
DRV-DATA
DRV-STB
DRV-CLK
FP562
LED DISPLAY
G1
G2
G3
G4
S1
S2
S7
S8
S9
S10
23
22
21
28
2
1
68
69
70
20
13
14
16
17
7
8
LINE-MUTE 28
5
6
914
13
8
11
10
264
4
5
CL502
12 P-ON+15V
11 AL+12V(2)
10 GND
9D-PFG
8D-CONT
7
LM-FWD/REV
6GND
5C-CONT
4C-F/R
3C-FG
2P-ON+5V
1
AL+12V/+20.5V
SENSOR CBA
SENSOR CBA
END-S
ST-S
Q504
Q505
REC-SAFETY
P-ON+5V
END-S
P-ON+5V
1 1KEY-2 KEY SWITCH
CL505 CN651
FUNCTION CBA
Comparison Chart of
Models & Marks
Model Mark
VR540/39
VR540/58
VR740/02
D
E
F
VR740/07 G
VR740/16
VR740/39
H
VR740/58
VR742/16
VR742/39
I
J
K
VR742/58
L
M
F,G,H,I,J,K,L,M
F,G,H,I,
J,K,L,M
D,E
D,I,L
[ VR540/ (39, 58), VR740/ (02, 07, 16, 39, 58), VR742/ (16, 39, 58) ]

CYLINDER ASSEMBLY
V(R)-1
V-COM
V(L)-1
CL253
1
2
3
Video Block Diagram
1-9-13 1-9-14 HE473BLV
(DECK ASSEMBLY)
VIDEO (R)-1
HEAD
SP
HEAD
AMP
EP
HEAD
AMP
REC FM
AGC
FROM/TO SERVO/SYSTEM
CONTROL BLOCK
FROM
SERVO/SYSTEM
CONTROL BLOCK
C-SYNC
RF-SW
D-REC-H
C-ROTA
D-V-SYNC
H-A-SW
H-A-COMP
V-ENV
LUMINANCE
SIGNAL
PROCESS
CHROMINANCE
SIGNAL
PROCESS
C-SYNC
V-ENV
H-A-COMP
H-A-SW
D-V-SYNC
C-ROTA/RF-SW
VIDEO (L)-1
HEAD
VIDEO (L)-2
HEAD
VIDEO (R)-2
HEAD
V(L)-2
V-COM
V(R)-2
4
5
6
TU701(TUNER UNIT)
IC301
(Y/C SIGNAL PROCESS)
IC501 (OSD)
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
SERIAL
DECORDER
V-OUT1 1
V-IN1
1
3 3
V-OUT2 1
V-IN2 3
1
3
JACK CBA
48
50
52
56
24
6
50
55
52
19
20
JK101
V-OUT1
V-IN1
19
20
JK102
CL151
CL152
CL101
CL102
V-OUT2
V-IN2
61
63
96
95
93
94
90
89
88
87
CHARA.
INS.
CCD 1H DELAY
SP
BYPASS
MUTE
PB/EE
IN1
TUNER
IN1
TUNER
MUTE
PB/EE
FRT
IN2
FRT
IN2
AGC
PR
R
Y
C
P
R P R P
EP
Y. DELAY
Y/C
MIX
+
21
7978
AGC VXO
OSD
CHARACTER
MIX COLOR
-IN
FBC
1/2
58 59
65
2928
IIC-BUS SDA
DAVN-L
IIC-BUS SCL
69684643
" " = SMD
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.
67
84
83
71
62
70
D-REC-H 80
BUFFER
Q101
BUFFER
Q102
TP301
X301
4.433619MHz C-PB
WF2
VIDEO-OUT
TU-VIDEO
V-IN1TO
SERVO/SYSTEM
CONTROL BLOCK
VIDEO-IN
BUFFER
Q351
MAIN CBA
TP502
RF-SW
WF1
J23
V-OUT
WF1
TRICK-H
SECAM-H
PB-H OUT
IC370 (PAL/SECAM DECTECTOR)
PAL/SECAM
DETECTOR
25 44
17
14
18
2
16
29
1
28
IC640 (VPS)
VPS-V
IIC-BUS SDA
DAVN-L
IIC-BUS SCL
6
14
7
16
F,G,H,I,J,K,L,M
D,E,I,J,L,M
D,I,L
Comparison Chart of
Models & Marks
Model Mark
VR540/39
VR540/58
VR740/02
D
E
F
VR740/07 G
VR740/16
VR740/39
H
VR740/58
VR742/16
VR742/39
I
J
K
VR742/58
L
M

Audio Block Diagram
REC
AMP
100 3
AUTO
BIAS
2
1
+5V
+5V
Q401
Q406
BIAS
OSC
Q402
N-A-PB
TO Hi-Fi
AUDIO BLOCK N-A-REC
Q405
(PB=ON)
Q403 (SWITCHING)
5EQ
AMP 98
7
LINE
AMP
REC-ON
AUDIO HD-SW
CONTROL
MUTE 11
6
PB-ON
SP/LP-ON
P
TUNER IN2
IN1
R
ALC
DET
ALC
IC301
(AUDIO SIGNAL PROCESS) 1513 17
4 A-PB/REC
CL504
3 A-COM
1 AE-H
2 AE-H/FE-H
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2
CL287
AUDIO
HEAD
AUDIO
ERASE
HEAD
ACE HEAD ASSEMBLY
FE HEAD
2 FE-H
1 FE-H-GND
CL501
1-9-15 1-9-16 HE473BLA
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC
71
A-MUTE-H
IIC-BUS SCL
IIC-BUS SDA TO SERVO/SYSTEM
CONTROL BLOCK
FULL
ERASE
HEAD
68 69
SERIAL
DECODER
(DECK ASSEMBLY)
" " = SMD
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.
12
16
INV
ATT

ENV
DET
LOGIC
R
L
HOLD
PULSE
LIM
OUTPUT
SELECT
Hi-Fi Audio Block Diagram
HE473BLH
REC-AUDIO SIGNALPB-AUDIO SIGNAL Mode : SP/REC
IIC-BUS SDA
IIC-BUS SCL
A-MODE
LINE-MUTE
MUTE
MUTE-ON
MUTE-ON
Hi-Fi-H-SW
" " = SMD
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.
IF SIGNAL
PROCESS
N-A-REC
TO AUDIO BLOCK N-A-PB
AFV CBA
TU-AUDIO(R)
4
TU-AUDIO(L) 5
4
5
CN701 CN1
SIF 22
CN701
CN1
TU701
AUDIO IN
SIF OUT
2
22
JACK CBA MAIN CBA
JK101
A-IN1(R)
A-IN1(L)
2
6
2
6
1
3
1
3
JK102
CL151
CL152
CL101
CL102
A-IN2(R)
A-IN2(L)
A-OUT1(R)
A-OUT1(L)
A-OUT2(R)
A-OUT2(L)
A-IN2(R)
(Hi-Fi AUDIO SIGNAL PROCESS)
9
A-IN2(L) 8
9
8
A-OUT2(R) 6
A-OUT2(L) 11
6
11
A-IN1(R) 10
A-IN1(L) 8
10
8
A-OUT1(R) 6
A-OUT1(L) 12
6
12
IC451
1-9-17 1-9-18
Hi-Fi
AUDIO
(R) HEAD
Hi-Fi
AUDIO
(L) HEAD
CYLINDER
ASSEMBLY
Hi-Fi-A(R) 9
Hi-Fi-COM 8
Hi-Fi-A(L) 7
CL253
48
47
14
15
R-CH
INSEL
L-CH
INSEL
ALC
SW
SW
ALC
62
61 71
70
24
26
27
34 33
L-CH
BPF
COMP
SW
NOISE
COMP
SW
NOISE
R-CH
BPF
VCO
LPF
LIM DEV
VCO
LPF
LIM DEV
MIX V/I
NOISE
DET
DO
DET
P
P
R
R
VCO MUTE
73
74
72
76
77
75
37
38
21
53
39
L-CH
PNR
ALC
R-CH
PNR
ALC
67
65
52
56
54
50
60
2
6
10
8
4
78
80
+
TU-AUDIO 11 AUDIO OUT
21
Q451
FROM/TO SYSTEM
CONTROL BLOCK
E,F,G,H,J,K,M
F,G,H,I,J,K,L,M
JK751
A-OUT
(L)
A-OUT
(R)
SUB JACK CBA
CL509
A-OUT1(L)
2
A-OUT1(R)
1
Comparison Chart of
Models & Marks
Model Mark
VR540/39
VR540/58
VR740/02
D
E
F
VR740/07 G
VR740/16
VR740/39
H
VR740/58
VR742/16
VR742/39
I
J
K
VR742/58
L
M

2
4
16
6
7
Power Supply Block Diagram
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F001) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
HE473BLP1-9-19 1-9-20
COLD
MAIN CBA
HOT CIRCUIT. BE CAREFUL.
HOT
IC001
ERROR
VOLTAGE DET
Q002
Q003
Q001
F001 L003
LINE
FILTER
BRIDGE
RECTIFIER
D001 - D004
1
23
4
Q004
(SHUNT REGULATOR)
REG
AC001
T001
P-ON+32V
P-ON+15V
12
P-ON-H
AL+12V/+20.5V
AL+9V
AL+12V
C-POW-SW
AL+5V
TIMER+5V
P-ON+5V
P-DOWN-L
P-OFF-H
Q051
Q053
Q054
Q056
Q052
Q057
Q058
13
15
14
11
17
18
T1.6A L 250V
Q055
Q059

Main 1/8 Schematic Diagram Parts Location Guide
1-10-31
RefNo. Position RefNo. Position RefNo. Position
C501 B-1 CL501 A-2 R522 E-4
C502 B-1 CL502 F-4 R523 B-4
C506 C-1 CL504 A-3 R524 B-4
C508 E-2 R525 B-3
C510 E-2 D501 E-4 R526 A-2
C511 E-2 D502 A-1 R527 A-2
C512 E-2 D552 E-3 R528 B-1
C513 E-2 D553 E-2 R529 A-1
C514 E-2 R530 E-1
C515 E-2 IC501 C-3 R531 E-1
C516 E-2 IC503 A-4 R533 D-1
C517 E-4 R551 E-3
C518 E-4 L501 A-1 R552 E-3
C519 B-4 L851 D-3 R555 C-1
C520 A-3 R556 C-1
C521 A-2 Q501 E-2 R557 C-1
C522 A-2 Q502 A-2 R558 C-1
C523 A-2 Q503 D-1 R603 C-4
C524 A-2 Q551 E-3 R607 C-4
C526 A-2 Q552 D-3 R611 C-1
C527 B-2 R624 D-4
C529 A-2 R501 B-1 R625 D-4
C530 B-2 R502 B-2 R851 D-3
C531 B-1 R503 C-2 R852 D-3
C532 A-3 R504 B-1 R853 D-4
C533 A-3 R505 B-1
C535 E-1 R506 C-1 SW506 D-1
C563 E-4 R508 D-2
C564 A-2 R509 D-1 VR501 B-1
C851 E-3 R510 C-4
C852 E-3 E511 E-2 X501 D-2
C853 D-3 R513 E-2 X502 D-2
C854 E-3 R514 E-2
C855 D-3 R516 D-2 PS503 E-1
C856 D-4 R517 D-3 RS501 B-2
C858 D-4 R518 F-3
C859 D-4 R520 E-4 TP501 A-2
C862 D-3 R521 E-4 TP502 C-1
MISCELLANEOUS
TEST POINTS
CAPACITORS
RESISTORS
CONNECTORS
SWITCHES
RESISTORS
VARIABLE RESISTORS
CRYSTAL OSCILLATORS
DIODES
TRANSISTORS
ICS
COILS
[ VR540/ (39, 58),VR740/ (02, 07, 16, 39, 58),VR742/ (16, 39, 58) ]

Main 1/8 Schematic Diagram
1-10-32 1-10-33 HE473SCM1
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES. INDICATESTHATTHE VOLTAGE
IS NOT CONSISTENT HERE.
MODE: SP/REC PLAYMODE
REC MODE
123
5.0 5.0
(2.5)
~
“ “ = SMD
IC501 KEY VOLTAGE CHART
KEY 1 (7 PIN) KEY 2 (8 PIN) KEY 2 (8 PIN)
(D,E) (F,G,H,I,J,K,L)
0.00 ~ 0.51V POWER STOP/EJECT STOP/EJECT
0.51 ~ 0.92V CH DOWN REW REW
0.92 ~ 1.27V CH UP PLAY PLAY
1.27 ~ 1.61V ------------------- FF FF
1.61 ~ 1.98V ------------------- ------------------- -------------------
1.98 ~ 2.39V REC/OTR ------------------- PAUSE
2.39 ~ 2.90V ------------------- ------------------- -------------------
2.90 ~ 3.60V S-INH ------------------- -------------------
3.60 ~ 4.30V ------------------- ------------------- -------------------
4.30 ~ 5.00V KEY OFF KEY OFF KEY OFF
Comparison Chart of
Models and Marks
MODEL MARK
VR540/39 D
VR540/58 E
VR740/02 F
VR740/07 G
VR740/16 H
VR740/39 I
VR740/58 J
VR742/16 K
VR742/39 L
VR742/58 M

Main 2/8 & Sensor Schematic Diagram
1-10-34 1-10-35 HE473SCM2
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES. INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
MODE: SP/REC PLAYMODE
REC MODE
123
5.0 5.0
(2.5)
~
“ “ = SMD
Comparison Chart of
Models and Marks
MODEL MARK
VR540/39 D
VR540/58 E
VR740/02 F
VR740/07 G
VR740/16 H
VR740/39 I
VR740/58 J
VR742/16 K
VR742/39 L
VR742/58 M

1-10-36
MAIN 2/8 Schematic Diagram Parts Location Guide
RefNo. Position RefNo. Position
C538 K-4 R538 K-3
C540J-3R539K-3
C561J-3R540K-4
C562 G-3 R541 K-4
C702 I-2 R542 J-2
C703 I-2 R543 J-2
C704 H-2 R544 K-2
C706 H-1 R545 K-2
C707 H-1 R546 K-2
C708 G-1 R547 J-2
C716 G-1 R548 K-2
C717 G-1 R549 K-2
R566 J-4
CN505 K-2 R701 G-2
CN701 K-1 R702 G-1
R703 G-1
D701G-2R706G-1
IC561 J-4 SW501 J-2
SW502 J-2
L561 G-3 SW503 K-2
L562 G-3 SW505 K-2
L701 I-2 SW507 J-3
L702 I-1 SW509 J-2
L703 H-2 SW510 K-2
L704 G-1 SW511 K-2
SW512 K-2
Q504 L-4
Q505 L-4 FP562 H-4
TU701 H-2
R534 J-3
R535 J-3 TP506 K-4
R536 J-3 TP507 K-2
R537 J-3
CAPACITORS RESISTORS
ICS
COILS
TRANSISTORS MISCELLANEOUS
RESISTORS
CONNECTORS
DIODES
TEST POINTS
SWITCHES

1-10-37
MAIN 3/8 Schematic Diagram Parts Location Guide
RefNo. Position RefNo. Position RefNo. Position RefNo. Position
C251 N-3 C347 O-4 Q401 N-2 R402 N-2
C252 N-3 C351 N-4 Q402 M-1 R403 N-2
C253 N-3 C352 M-4 Q403 N-1 R404 M-2
C254 N-3 C401 N-2 Q405 M-1 R407 M-1
C302 P-1 C402 N-1 Q406 N-1 R408 N-2
C303 P-1 C403 M-2 Q771 R-1 R409 N-2
C304 P-2 C404 M-1 Q772 R-1 R411 N-2
C305 P-1 C411 O-1 R412 O-2
C307 P-1 C412 O-2 R251 N-3 R413 O-2
C308 P-1 C414 O-1 R252 N-3 R414 O-1
C309 P-1 C415 O-1 R301 P-1 R415 O-1
C310 Q-2 C416 O-2 R302 P-1 R416 O-1
C311 Q-2 C417 O-1 R303 Q-2 R417 O-1
C312 Q-2 C418 O-1 R304 Q-2 R418 N-1
C313 Q-2 C419 O-1 R305 Q-2 R421 O-1
C314 Q-3 C421 O-2 R307 P-4 R422 O-1
C315 Q-3 C422 O-1 R308 P-4 R425 O-1
C316 Q-3 C424 O-2 R309 P-4 R426 O-1
C317 Q-3 C425 O-1 R310 O-4 R429 O-1
C318 Q-3 C428 O-1 R311 O-4 R430 O-1
C319 Q-3 C430 P-1 R312 N-4 R431 P-1
C320 Q-3 C431 P-1 R313 N-4 R771 Q-1
C321 Q-3 C771 Q-2 R315 O-4 R772 Q-1
C322 Q-3 C772 R-1 R316 O-4 R773 Q-1
C323 Q-3 C773 R-2 R317 O-4 R774 Q-1
C324 Q-3 C774 R-2 R318 O-4 R775 Q-1
C325 Q-4 C775 Q-2 R319 N-4 R776 R-1
C326 Q-4 C776 Q-2 R320 O-4 R777 R-1
C327 P-4 C777 Q-2 R321 Q-4 R778 Q-2
C329 P-4 C778 Q-2 R323 Q-3 R779 Q-2
C330 P-4 R324 N-3 R780 R-2
C332 P-4 CL253 M-3 R325 Q-3 R781 Q-2
C333 P-4 R326 Q-3 R782 R-2
C334 P-4 D301 N-4 R330 Q-3 R783 Q-2
C335 P-4 R331 Q-2 R784 Q-2
C336 O-4 IC301 N-2 R332 P-4 R785 Q-2
C337 O-4 IC771 Q-1 R334 Q-3 R786 Q-2
C338 O-4 R351 N-4 R787 Q-1
C339 O-4 L251 N-3 R352 N-4
C340 O-4 L301 O-4 R355 N-4 X301 P-2
C341 O-4 L402 M-2 R357 M-4
C342 O-4 L403 N-1 R358 N-4 TP301 P-2
C343 O-4 R360 M-4
C345 Q-3 Q351 N-4 R361 N-3
C346 P-4 Q352 N-3 R401 N-2
TRANSISTORS
TEST POINTS
COILS
CAPACITORS CAPACITORS RESISTORS
CONNECTORS
DIODES
ICS
CRYSTAL OSCILLATORS
RESISTORS
TRANSISTORS