Philips 14PV120 User manual

Service Manual
Service
Service
Service
TV-VCR Combination
Contents
Chapter
Adjustment Procedure
Schematic Diagrams and CBA's
Exploded Views
Mechanical and Electrical Parts Lists
Sec. 1:
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 22230
Survey of versions:
/01 PAL-BG, EURO
/07 PAL I, UK/IRELAND
/39 PAL/SECAM-BG+PAL/SECAM-L/L',FRANCE
/58 PAL-BG/DK+SECAM-BG/DK,EAST-EURO
For technical data reference is made to the Service Manual of
14PV374/01/07/39/58 & 14PV375/01/07/39/58 3103 785 22220.
The present Manual states only the differences.
14PV120/07
14PV125/01/07/39/58
14PV225/01/07/39/58
14PV422/01/07/39/58
14PV425/07
Sec. 2: Standard Maintenance
Mechanism Alignment Procedures
Disassembly / Assembly of Mechanism
Deck Exploded Views

1-4-3 T6410IB
OPERATING CONTROLS AND FUNCTIONS
[ 14PV120/07, 14PV125/ ( 01, 07, 39, 58 ), 14PV225/ ( 01, 07, 39, 58 ),
14PV422/ ( 01, 07, 39, 58 ), 14PV425/07 ]

1-4-4 T6410IB

CONTROL
HEAD
CL402
AC HEAD ASSEMBLY
MAIN CBA
KEY-2
RF-SW
ST-SENS.
T-REEL
KEY-1
DV-SYNC
C-SYNC C-SYNC
V-ENV
REMOTE
CTL(+)
RESET
C-ROTA
REC-SAFETY
A-MUTE-H
SCL
SDA
A-MUTE-H
CTL(-)
RF-SW
DV-SYNC
V-ENV
C-ROTA
END-SENS.
IC201
(SERVO/SYSTEM CONTROL)
14
94
95
10
4
80
34
18
15
6
13
74
31
20
72
8
7
RS201
REMOTE
SENSOR
CTL AMP-OUT
97
AL+5V
D201
S-LED
CTL
TP001
(DECK ASSEMBLY)
Servo/System Control Block Diagram
BLOCK DIAGRAMS
END-SENS. T-REEL
ST-SENS.
Q202 Q205Q201
Q204
RESET
TIMER+5V
32
33
47
EXT-L
SP-MUTE SP-MUTE
44
SW211
REC
SAFETY
FROM/TO VIDEO
BLOCK
FROM/TO AUDIO
BLOCK
KEY SWITCH
KEY SWITCH
SW201 SW205
1-7-15 1-7-16 T6410BLS
SCL
(MEMORY)
SDA
6
5
P-DOWN-L 85
P-ON-H P-DOWN-L
P-ON-H
67
LD-SW9
I2C-OPEN 45
71
AL+5V
SW212
LD-SW
CS
7
FROM/TO POWER
SUPPLY BLOCK
SW206 SW210
SDA
SCL
FROM/TO CHROMA
BLOCK
SDA
SCL
IC202
WF3
I2C-OPEN
M
M
LOADING
MOTOR
CYLINDER ASSEMBLY CAPSTAN MOTOR
SENSOR CBA
(ST-SENSOR)
SENSOR CBA
(END-SENSOR)
DRUM
MOTOR
PG
SENSOR
4C-F/R
1CM+12V
11AL+12V(1)
2P-ON+5V(3)
6FG-GND
3C-FG
5
C-CONT
10M-GND
7LD-CONT
8D-CONT
9
D-PFG
12VG
CN201
C-FG
C-CONT
D-PFG
C-F/R
90
76
87
78
LD-CONT
81
D-CONT
77
CM+12V
AL+12V(1)
P-ON+5V(3)
M
CAPSTAN
MOTOR
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.
D-REC-H
TRICK-H
SECAM-H SECAM-H
TRICK-H
D-REC-H
SDA
SCL
42
48
29
EXT-L
SCART-H
SCART-MUTE
SCART-H
SCART-MUTE
2CTL(+)
1CTL(-)
REC LED 24
REC LED 23
D202 REC
AL+5V
D204 STANDBY
P, T, X
Comparison Chart of
Models & Marks
Model Mark
14PV225/07
14PV225/01
14PV225/58
14PV225/39
14PV422/07
14PV125/07
14PV125/01
14PV120/07
14PV425/07
14PV125/58
14PV125/39
14PV125/39
14PV422/01
14PV422/58
14PV422/39
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
+33V
[ 14PV120/07, 14PV125/ (01, 07, 39, 58), 14PV225/ (01, 07, 39, 58),
14PV422/ ( 01, 07, 39, 58 ), 14PV425/07 ]

CYLINDER ASSEMBLY
V(R)
V-COM
V(L)
CL401
1
2
3
Video Block Diagram
1-7-17 1-7-18 T6410BLV
(DECK ASSEMBLY)
VIDEO (R)
HEAD
SP
HEAD
AMP
REC FM
AGC
FROM/TO SERVO/SYSTEM
CONTROL BLOCK
FROM /TO
SERVO/SYSTEM
CONTROL BLOCK
C-SYNC
TRICK-H
RF-SW
D-REC-H
C-ROTA
D-V-SYNC
V-ENV
SECAM-H
LUMINANCE
SIGNAL
PROCESS
CHROMINANCE
SIGNAL
PROCESS
PB-H OUT
C-SYNC
V-ENV
D-V-SYNC
RF-SW/C-ROTA
VIDEO (L)
HEAD
IC401
(VIDEO/AUDIO SIGNAL PROCESS)
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
SERIAL
DECORDER
IC471 (PAL/SECAM DECTECOTR)
PAL/SECAM
DETECTOR
48
52
54
56
61
63
96
95
93
94
CHARA.
INS.
CCD 1H DELAY
BYPASS
MUTE
PB/EE
TUNER
TUNER1
MUTE
PB/EE
LINE
SCART
LINE
SCART
AGC
PR
R
Y
C
P
R P R P
Y. DELAY
Y/C
MIX
+
21
7978
AGC VXO
FBC
1/2
58 59
65
2928 44
17
12
2
16
29
1
28
SDA
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
62
70
D-REC-H 80
TP003
V-OUT
WF5
TP008
C-PB
WF6
MAIN CBA
TP002
RF-SW
WF1
14
X401
4.43MHz
24
Q703
Q705
JK701
V-IN
VIDEO OUT
TU001
BUFFER
20
BUFFER
BUFFER
Q401
TP010
GND
TO CHROMA
BLOCK VIDEO
TU1-VIDEO
TO CHROMA BLOCK C-VIDEO
JK703
V-IN
V-OUT 19
WF4
WF2
P, T, X
Comparison Chart of
Models & Marks
Model Mark
14PV225/07
14PV225/01
14PV225/58
14PV225/39
14PV422/07
14PV125/07
14PV125/01
14PV120/07
14PV425/07
14PV125/58
14PV125/3914PV125/39
14PV422/01
14PV422/58
14PV422/39
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

Audio Block Diagram
REC
AMP
100 3
AUTO
BIAS
2
1
+5V
+5V
Q854
Q856
BIAS
OSC
Q855
Q853(PB=ON)
Q852(PB=ON)
Q851
SWITCHING
D-REC-OFF
5EQ
AMP 98
7
LINE
AMP
REC-ON
TP007
AUDIO HD-SW
CONTROL
MUTE 11
6
PB-ON
SW CTL
SP/LP-ON
P
R
ALC
DET
ALC
IC401
(AUDIO SIGNAL PROCESS)
IC701 (SW)
13
17
3 A-PB/REC
CL402
4 A-COM
6 AE-H
5 FE-H
AUDIO
HEAD
AUDIO
ERASE
HEAD
ACE HEAD ASSEMBLY
FE HEAD
1 FE-H
2 FE-H-GND
CL403
1-7-19 1-7-20 T6410BLA
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC
71
A-MUTE-H
SCL
SDA FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
FROM 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
IC301
71
IC151 (AMP)
(VIDEO/AUDIO/CHROMA/DEFLECTION/IF)
SP 2
SP-GND 1
JK151
HEADPHONE JACK
SP151
SPEAKER
CN804 CL801
SP-MUTE
(FROM PIN 44 OF IC201)
OUTPUT
AMP
50
52
53
54
MUTE
5
1
215
5
34
13
12 14
21
2
1
AUDIO OUT
TU001
JK702
A-IN
JK703
A-IN
A-OUT
Q701
1011 9
SCART-H
EXT-L
SCART-MUTE
TUNER
TUNER1
LINE
LINE
A-OUT
ATT
AUDIO
MUTE
WF7
WF9
WF8

T6410BLC1-7-21 1-7-22
X301
4.43MHz
CL301A
CL302A
IC301 (VIDEO/AUDIO/CHROMA/DEFLECTION/IF)
IC201
(SYSTEM CONTROL/OSD)
V-SYNC
TEXT-L
OSD-R
OSD-G
OSD-B
OSD-BLK
H-SYNC
SLOW-SW
C-VIDEO C-VIDEO
RAPID-SW
OSD-G
OSD-R
OSD-B
59
58
60
62
63
64
82
TU1-VIDEO
FROM
VIDEO BLOCK
TO
CRT/H.V. BLOCK
CL301B
FROM/TO
CRT/H.V. BLOCK
CL302B
BLUE2
GREEN1
RED
Chroma Block Diagram
SDA
SCL
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
FROM
VIDEO
BLOCK
IC901 (TELETEXT DECODER)
REC VIDEO SIGNAL PB VIDEO SIGNAL Mode : SP/REC
WF18
WF17
WF10
WF11
CN303
CN901 CN751
CN752CN902
X901
(NO CONNECTION)
CN303 is used for
adjustment at factory
I2C-OPEN
3
FBP3
H-DRIVE2
ACL6
V-RAMP-FB5
V-DRIVE4
MAIN CBA
32
21
17
12
13
30
28
20
27
11
10
14
31
15
16
6
7
43
36
VIDEO
34
CHROMA
TRAP
SERIAL
I/F
INTELLIGENT
MONITORING
CHROMA
BPF
PAL
DECODER
SECAM
DECODER
BASE BAND
1H DELAY LINE
SYNC
SEPARATION
LUMA
SIGNAL
PROCESS
CIRCUIT
H-SYNC
PROCESS
CIRCUIT
V-SYNC
PROCESS
CIRCUIT
OSD MIX/RBG MATRIX/
BLANKING
TUNER
LINE/PB
TUNER
LINE/PB
CLOCK
CONTROL
CIRCUIT
" " = 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.
37
23
36
50
49
35
32
33
34
41
42
40
SW CTL
IC703 (SW)
5
34
2
115
12
13 14
7
16
8
11
15
56
61
65
68
I2C I/F
TELETEXT
DECODER
OSC/CLOCK
GENERATOR
TEXT CBA
12MHz
OSC
JK703
109 11
Q710
Q702
Q706
Q704
+5V
+5V Q711
SLOW-SW-IN
RGB CONT
RAPID-SW-IN
DISPLAY
TIMING
ADC/
DATA SLICER
INV
INT.MONITOR 1
I2C-OPEN 2
SDA 4
SCL 5
2 2OSD-BLK
4 4OSD-B
6 6OSD-G
3 3OSD-R
5 5Y-SW-OUT
2 2H-SYNC
4 4SDA
3 3SCL
1 1V-SYNC
M, N, O, P
Comparison Chart of
Models & Marks
Model Mark
14PV225/07
14PV225/01
14PV225/58
14PV225/39
14PV422/07
14PV125/07
14PV125/01
14PV120/07
14PV425/07
14PV125/58
14PV125/39
14PV125/39
14PV422/01
14PV422/58
14PV422/39
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

PUMP
UP
AMP
THERMAL
PROTECTION
3
6
7
1
5
8
10
7
9
6
GREEN AMP
BLUE AMP
Q501 Q502
Q503
H.DRIVE
Q533
Q551 T552
T6410BLCRT
CRT/H.V. Block Diagram
V-
DRIVE
H-
DRIVE
L551
DEFLECTION-YOKE
IC551 (V-DEFLECTION CONTROL)
T551 F.B.T.
ANODE
FOCUS
SCREEN
CRT CBA
R
G
B
HEATER
ANODE
GND
V501
CRT
GND
FOCUS
SCREEN
JK501
HEATER 11
CN501
CL501BCL501A
REC VIDEO SIGNAL PB VIDEO SIGNAL
CN551
P-ON+160V 33
FROM/TO
CHROMA BLOCK
CL302A
11
S
F
HV
FOCUS VR
SCREEN VR
1-7-241-7-23
+B
FROM
POWER SUPPLY BLOCK DEF+B
H.OUTPUT
1
5
3
4
5
4
3
1
WF12
WF15WF14
WF16
WF13
RED AMP
Mode : SP/REC
CN502
2
VCC
" " = 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.
2
3
4
CN301CL301B
FROM CHROMA
BLOCK CL301A
JUNCTION-C
CBA
JUNCTION-B
CBA
CN552
CN302CL302B
H.V./POWER SUPPLY CBA
2 2RED
4 4GREEN
3 3BLUE
4 4V-DRIVE
2 2H-DRIVE
3 3FBP
6 6ACL
5 5V-RAMP-FB
4
3
3
6
5

Power Supply Block Diagram
6
4
2
1
14
13
11
10
9
8
LINE
FILTER
BRIDGE
RECTIFIER
T601
IC601
ERROR
VOLTAGE DET
W601
F601
T4A/250V
L601,L602 D601 - D604
T6410BLP
SWITCHING
Q604
VR601
DEGAUSSING
COIL
CN601
Q602
+B ADJ.
FEED
BACK
LIMITER
Q603
PS602
4 1
3 2
HOT COLD
1-7-26
1-7-25
Q608
DG601
MAIN CBA
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F601) 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.
TIMER+5V
P-DOWN-L
(TO PIN85 OF IC201)
P-ON-ON
AL+9V
P-ON+8V
AL+12V(2)
AL+12V(1)
AL+5V
+5.7V
REG.
IC301
3955
+B
DEF+B
POWER
SW601
+5V REG.
Q606Q605
+8V REG.
Q607
AL+5V
P-ON+8V
P-ON-L
P-DOWN-L
12
5
4
6
AL+12V(1)3
AL+12V(2)7
AL+9V8
AL+33V11
12
5
4
6
3
7
8
11
TO
CRT/H.V.
BLOCK
TP503
+B
TP504
GND
CN602
12
JUNCTION-A CBA
H.V./POWER SUPPLY CBA
CL603BCN603
P-ON-H
(FROM PIN67 OF IC201)
+5V
REG.
+5V
REG.
+5V
REG.
IC681
Q684
Q686
P-ON+5V(1)
P-ON+5V(3)
P-ON+5V(2)
AL+33V
CM+12V
CL603A
12
5
4
6
3
7
8
11
12
5
4
6
3
7
8
11
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T4A/250V FUSE.
Q682
Q206

Ref No. Position Ref No. Position Ref No. Position Ref No. Position
RESISTORS RESISTORS
C203 B-3 CN201 F-5 R220 B-3 R268 E-3
C205 B-3 R221 B-3 R269 E-3
C207 B-1 D201 B-3 R222 B-3 R270 B-1
C208 B-1 D202 B-2 R223 B-2 R271 B-2
C209 C-1 D204 B-2 R224 B-2 R272 B-3
C210 C-1 D205 B-1 R226 B-1 R273 B-2
C211 B-1 D206 D-3 R227 B-1 R274 B-2
C212 B-1 D210 D-2 R228 B-1 R275 D-2
C213 B-1 D211 D-2 R229 B-1 R276 D-2
C214 B-1 D212 D-2 R230 B-1 R277 D-2
C217 C-1 D213 A-4 R231 C-1 R278 D-2
C218 C-1 D214 A-4 R232 C-1 R279 D-2
C221 D-2 R233 C-1 R280 D-2
C222 D-2 IC201 C-3 R234 C-1 R281 C-1
C223 D-2 IC202 D-1 R235 D-2 R282 D-2
C224 D-2 R236 D-2 R287 B-1
C225 D-2 L201 D-2 R237 D-2 R288 E-1
C226 D-2 R238 D-2 R289 E-1
C227 D-3 Q204 B-1 R239 D-2
C228 D-3 Q205 D-4 R240 D-2 SW201 B-4
C229 D-3 Q206 C-4 R241 D-3 SW202 A-4
C230 E-3 RESISTORS R242 D-3 SW203 A-4
C231 D-4 R201 B-4 R243 D-3 SW204 A-4
C233 D-4 R202 B-4 R244 D-3 SW205 A-4
C234 D-4 R203 B-3 R248 D-3 SW206 B-4
C235 C-4 R204 B-4 R249 D-3 SW207 A-4
C236 C-4 R205 B-3 R250 D-3 SW208 A-4
C237 C-4 R206 B-3 R254 C-4 SW209 A-4
C238 C-4 R207 B-4 R255 C-4 SW210 A-4
C239 C-4 R208 B-4 R256 C-4 SW211 B-1
C240 C-4 R209 A-4 R257 B-3 SW212 A-4
C241 C-4 R210 A-4 R258 B-4
C242 D-4 R211 A-4 R259 B-4 TP001 C-4
C243 D-4 R212 A-4 R260 A-4
C244 C-4 R213 B-4 R261 A-4 X201 C-1
C245 C-4 R214 B-4 R262 A-4 X202 C-1
C248 B-1 R215 A-4 R263 A-4
C253 B-2 R216 A-4 R264 A-4 RS201 B-1
C254 C-4 R217 A-4 R265 D-1
C255 C-4 R218 B-3 R266 D-1
C256 C-1 R219 B-3 R267 E-1
TEST POINT
CAPACITORS
COIL
ICS
SWITCHES
MISCELLANEOUS
CONNECTOR
DIODES
TRANSISTORS
CRYSTAL OSCILATORS
1-8-43
Main 1/5 Schematic Diagram Parts Location Guide
[14PV120/07,14PV125/(01,07,39,57),14PV225/(01,07,39,57),14PV422/
(01,07,39,57),14PV425/07 ]

Main 1/5 Schematic Diagram
1-8-44 1-8-45 T6410SCM1
Voltage indications for PLAY and REC modes on
the Schematic Diagrams are as shown below:
1 2 3
5.0
(2.5)
~
5.0
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES.
INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
PLAY MODE
REC MODE
“ “ = SMD
Comparison Chart of
Models and Marks
MODEL MARK
14PV225/07 M
14PV225/01 N
14PV225/58 O
14PV225/39 P
14PV422/07 Q
14PV422/01 R
14PV422/58 S
14PV422/39 T
14PV125/07 U
14PV125/01 V
14PV125/58 W
14PV125/39 X
14PV120/07 Y
14PV425/07 Z

Main 2/5 Schematic Diagram
1-8-46 1-8-47 T6410SCM2
Voltage indications for PLAY and REC modes on
the Schematic Diagrams are as shown below:
1 2 3
5.0
(2.5)
~
5.0
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES.
INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
PLAY MODE
REC MODE
“ “ = SMD

1-8-48
Main 2/5 Schematic Diagram Parts Location Guide
Ref No. Position Ref No. Position Ref No. Position Ref No. Position
C401 J-1 C443 H-3 L402 H-3 R851 H-1
C402 J-1 C444 H-2 L403 H-4 R852 H-1
C403 J-2 C445 H-2 L852 H-1 R853 H-1
C404 J-1 C452 J-4 L854 H-1 R854 H-1
C405 J-1 C851 H-1 R856 H-1
C406 J-2 C855 H-1 Q401 J-4 R857 G-1
C407 J-1 C856 G-1 Q851 H-1 R858 G-1
C408 J-1 C857 G-1 Q852 G-1 R859 H-1
C409 K-2 C858 H-1 Q853 G-1 R860 H-1
C410 K-2 C859 H-1 Q854 H-1 R861 I-1
C411 K-2 C860 H-1 Q855 H-1 R862 I-1
C412 K-2 C861 H-2 Q856 H-1 R863 H-1
C413 K-2 C862 H-1 Q857 H-3 R864 I-1
C414 K-2 C863 I-1 R865 I-1
C415 K-3 C864 I-1 R401 J-1 R866 I-1
C416 K-3 C865 I-1 R402 J-1 R867 I-1
C417 K-3 C866 I-2 R405 K-2 R869 I-1
C418 K-3 C867 I-1 R406 K-2 R870 I-1
C419 K-3 C868 I-1 R407 K-3 R871 J-2
C420 K-3 C869 I-1 R408 K-4 R874 I-1
C421 K-3 C871 I-1 R409 K-4 R876 I-1
C424 K-4 C872 J-1 R410 J-4 R877 I-1
C425 J-4 C874 I-1 R411 J-4 R878 H-2
C426 K-4 C875 I-1 R412 I-4 R879 H-2
C427 J-4 C876 J-1 R413 I-4
C430 H-4 R414 I-4 X401 J-2
C431 J-4 CL401 G-3 R415 H-4
C432 J-4 CL402 G-1 R416 H-4 TP002 I-4
C433 J-4 CL403 G-1 R417 H-4 TP003 K-4
C434 J-4 R418 H-3 TP007 I-1
C435 I-4 D401 K-3 R420 H-3 TP008 J-1
C436 H-4 D402 H-4 R422 K-4 TP010 K-1
C438 H-4 R423 K-4
C440 H-4 IC401 H-2 R424 H-4
C441 H-4 R425 I-4
C442 H-3 L401 K-3 R426 I-4
TRANSISTORS
RESISTORS
DIODES
CAPACITORS
CONNECTORS
RESISTORSCAPACITORS COILS
IC
COILS
TEST POINTS
CRYSTAL OSCILATOR

Main 3/5 Schematic Diagram Parts Location Guide
1-8-49
Ref No. Position Ref No. Position Ref No. Position
C001 R-4 C333 N-2 R156 N-4
C002 Q-4 C334 N-2 R301 N-1
C006 P-4 C336 P-3 R302 N-1
C007 Q-3 C338 M-3 R303 N-1
C008 Q-3 C339 M-3 R304 O-1
C009 R-3 C340 P-1 R305 O-1
C012 Q-4 C341 N-2 R306 O-1
C151 O-4 C344 M-3 R307 O-1
C152 N-4 C350 N-3 R308 O-1
C154 O-4 R309 O-1
C155 P-4 CL301A R-1 R310 P-1
C156 P-4 CL302A M-4 R311 P-3
C157 P-4 CN303 M-3 R312 O-1
C160 P-4 CN804 M-4 R313 P-2
C301 N-1 R314 P-2
C302 N-1 D151 O-4 R315 P-2
C303 N-1 D152 O-4 R316 P-2
C304 N-1 D302 P-1 R317 P-3
C305 N-1 D303 P-1 R318 P-3
C307 O-3 D304 P-1 R320 O-3
C308 P-2 D305 P-3 R321 N-3
C309 P-2 D306 P-2 R322 N-3
C310 P-2 R323 N-3
C311 P-2 IC151 O-4 R324 N-3
C312 P-2 IC301 N-1 R325 N-2
C313 P-2 R326 N-2
C314 P-2 J418F3 M-4 R327 M-2
C315 P-2 L001 Q-4 R328 N-2
C316 P-3 L151 N-4 R332 M-3
C317 P-3 L152 N-4 R333 M-3
C318 O-3 L302 P-2 R334 M-3
C319 P-3 L303 P-3 R335 N-3
C320 P-3 L304 N-1 R336 O-1
C321 O-3 L305 O-4 R339 O-1
C322 O-3 R340 O-1
C323 N-3 R003 P-3
C324 N-3 R004 P-3 X301 P-3
C325 N-3 R005 P-3
C326 N-3 R006 P-3 JK151 M-4
C327 N-3 R151 M-4 TU001 R-4
C328 N-3 R152 Q-4
C330 N-2 R153 P-4 TP006 R-4
C331 N-2 R154 P-4
C332 N-3 R155 N-4
TEST POINTS
DIODES
COILS
RESISTORS
CRYSTAL OSCILATOR
MISCELLANEOUS
CAPACITORS RESISTORS
IC
CAPACITORS
CONNECTORS

Main 3/5 Schematic Diagram
1-8-50 1-8-51 T6410SCM3
Voltage indications for PLAY and REC modes on
the Schematic Diagrams are as shown below:
1 2 3 5.0
(2.5)
~
5.0
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES.
INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
PLAY MODE
REC MODE
“ “ = SMD

Main 4/5 Schematic Diagram
1-8-52 1-8-53 T6410SCM4
“ “ = SMD
Voltage indications for PLAY and REC modes on
the Schematic Diagrams are as shown below:
123
5.0
(2.5)
~
5.0
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES.
INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
PLAY MODE
REC MODE
“ “ = SMD
VOLTAGE CHART (Power off mode)
Ref. No.
IC602
Ref. No.
Q682
Q684
Q685
Q686 03.10
0.1 3.1 0
00.60
123
3.2 0 1.9
07.90
ECB
Comparison Chart of
Models and Marks
MODEL MARK
14PV225/07 M
14PV225/01 N
14PV225/58 O
14PV225/39 P
14PV422/07 Q
14PV422/01 R
14PV422/58 S
14PV422/39 T
14PV125/07 U
14PV125/01 V
14PV125/58 W
14PV125/39 X
14PV120/07 Y
14PV425/07 Z

Main 4/5 Schematic Diagram Parts Location Guide
1-8-54
Ref No. Position Ref No. Position
C471 T-3 D688 U-2
C472 T-3 D690 U-2
C473 T-3 D691 U-2
C474 T-3 D693 W-1
C475 U-3 D694 T-2
C476 U-3
C478 U-3 IC471 T-3
C479 U-4 IC681 T-2
C480 U-4
C481 U-4 L681 T-1
C483 U-3 L682 T-2
C484 T-4
C485 T-4 Q682 T-1
C486 T-4 Q684 S-2
C681 T-1 Q685 U-2
C682 U-2 Q686 U-1
C683 T-2
C684 T-2 R471 T-3
C687 S-2 R681 S-1
C688 U-1 R683 T-2
C689 T-1 R684 U-1
C691 U-2 R685 T-1
C692 U-2 R686 T-1
C694 W-2 R690 T-2
R691 S-2
CL603A S-2 R692 U-2
R693 T-2
D471 T-3 R694 T-2
D682 T-1 R696 T-1
D686 U-3 R697 W-1
D687 U-2 R698 W-1
DIODES
ICS
COILS
DIODES
RESISTORS
CAPACITORS
TRANSISTORS
CONNECTOR

Main 5/5 Schematic Diagram Parts Location Guide
1-8-55
Ref No. Position Ref No. Position
C701 Y-1 R705 BB-2
C703 BB-2 R707 AA-4
C705 CC-4 R709 CC-4
C706 CC-4 R710 BB-4
C707 AA-4 R711 AA-3
C708 BB-4 R712 CC-4
C709 BB-4 R714 CC-4
C710 CC-4 R723 CC-4
C711 CC-3 R724 CC-4
C713 CC-3 R725 CC-4
C714 CC-3 R726 CC-4
C715 Z-1 R727 CC-3
C716 BB-4 R728 BB-4
C719 BB-1 R729 BB-4
C723 BB-3 R730 BB-4
C724 AA-3 R731 CC-3
R732 CC-3
CN751 Y-4 R733 CC-3
CN752 Y-2 R734 CC-3
R735 CC-3
D706 CC-4 R736 CC-3
D711 CC-3 R737 CC-3
D712 AA-3 R738 BB-2
D713 Z-1 R739 CC-2
D715 BB-4 R740 AA-2
D716 CC-3 R741 Z-1
R742 AA-2
IC701 CC-2 R743 AA-2
IC703 AA-2 R744 AA-2
R745 AA-2
L701 CC-3 R746 AA-2
L702 CC-3 R747 AA-2
R748 AA-2
Q701 BB-3 R749 CC-2
Q702 CC-4 R750 Y-1
Q703 CC-3 R751 Y-2
Q704 BB-4 R752 BB-3
Q705 BB-3 R753 Y-2
Q706 BB-4 R754 BB-3
Q707 AA-2 R755 AA-3
Q708 AA-2 R756 BB-4
Q709 BB-2 R757 BB-4
Q710 BB-3
Q711 BB-4 TP009 BB-3
R701 Y-1 JK701 Y-1
R702 Y-1 JK702 Y-1
R703 CC-4 JK703 CC-4
R704 CC-4
MISCELLANEOUS
RESISTORSCAPACITORS
TRANSISTORS
CONNECTOR
TEST POINTS
DIODES
ICS
COILS
RESISTORS

1-8-56 1-8-57 T6410SCM5
Main 5/5 Schematic Diagram
Voltage indications for PLAY and REC modes on
the Schematic Diagrams are as shown below:
1235.0
(2.5)
~
5.0
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES.
INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
PLAY MODE
REC MODE
“ “ = SMD

FULL ERASE HEAD
WIRING DIAGRAM FOR SECTION 2 (DECK MECHANISM)
WIRING DIAGRAM
CRT CBA
BT6400F01021-B
FOCUS
SCREEN
GND
D.Y.
HD
VD
CL403
MAIN CBA
CN501
1
2
CN601
W601
T551
FBT
CRT
1
2
3
4
5
CN551
ANODE
FE HEAD
SP151
SPEAKER
CN804 CL801
1-10-3 T6410WI 1-10-4
CN303
AUDIO HEAD
CONTROL HEAD
AC HEAD ASSEMBLY
AUDIO ERASE
HEAD
(NO CONNECTION)
CN303 IS USED FOR
ADJUSTMENT AT
FACTORY
M
LOADING
MOTOR
CYLINDER ASSEMBLY
CN201
CL401
CL402
CAPSTAN MOTOR
VIDEO
(R)
HEAD
VIDEO
(L)
HEAD
MDRUM
MOTOR
PG
SENSOR
CL603A
CN901CN751
V-SYNC1
H-SYNC
2
SCL3
SDA
4
Y-SW-OUT5
GND
6
AL+9V7
TEXT-RESET8
1
2
3
4
5
6
CN902CN752
P-SAFETY 21
OSD-BLK
2
OSD-R3
OSD-B
4
PROTECT 5
OSD-G
6
1
2
3
4
5
6
7
8
CL603B
CN603
JUNCTION-A CBA
BT6300F01011 TEXT CBA
BT6400F01031
CN602
CL302A
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
CL302BCN302
JUNCTION-B CBA
BT6400F01011
CN552
CL301A
CL501B
HEATER1
GND
2
P-ON+160V3
CL501A
HEATER1
GND
2
P-ON+160V3
1
2
3
4
CL301B
1
2
3
4
CN301
JUNCTION-C CBA
BT6400F01011
CN502
H.V. / POWER SUPPLY CBA
BT6400F01021-A
SENSOR CBA
(END-SENSOR)
BHB300F01013-A,B
SENSOR CBA
(ST-SENSOR)
BHB300F01013-A,B
3
V(L)
V-COM 2
V(R) 1
VG 12
AL+12V(1) 11
M-GND 10
D-PFG 9
D-CONT 8
LD-CONT 7
FG-GND 6
C-CONT 5
C-F/R 4
3
C-FG
P-ON+5V(3) 2
1
CM+12V/20.5V
BT6400F01011
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.)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
JK703
GND 1
RED 2
BLUE 3
GREEN 4
SP 2
SP-GND 1
GND1
BLUE2
GREEN3
RED4
INT.MONITOR 1
I2C-OPEN2
GND3
SDA4
SCL5
CTL(-) 1
CTL(+) 2
A-PB/REC 3
A-COM 4
AE-H/FE-H 5
AE-H 6
FE-H 1
FE-H GND 2
GND8
GND1
H-DRIVE2
FBP3
V-DRIVE4
V-RAMP-FB5
ACL6
P-SAFETY17
GND 8
GND 1
H-DRIVE 2
FBP 3
V-DRIVE 4
V-RAMP-FB 5
ACL 6
P-SAFETY1 7
GND1
NU2
AL+12V(1)3
P-DOWN-L4
AL+5V5
P-ON-L6
AL+12V(2)7
AL+9V8
GND9
GND10
AL+33V11
P-ON+8V12
PROTECT13
GND 1
NU 2
AL+12V(1) 3
P-DOWN-L 4
AL+5V 5
P-ON-L 6
AL+12V(2) 7
AL+9V 8
GND 9
GND 10
AL+33V 11
P-ON+8V 12
PROTECT 13
Comparison Chart of
Models & Marks
Model Mark
14PV225/07
14PV225/01
14PV225/58
14PV225/39
14PV422/07
14PV125/07
14PV125/01
14PV120/07
14PV425/07
14PV125/58
14PV125/3914PV125/39
14PV422/01
14PV422/58
14PV422/39
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
M, N, O, P