Sylvania 6842PF M, Service Manual

1-2-1

L0654BLP

Main Power Supply Block Diagram

2A/250V

2A  250V

8A  250V

T

O

 SUB PO

WER

BLOCK DIA

GRAM

(CN2004)

F2100

8A/250V

F2300

2A/250V

F2400

2A/250V

HOT CIRCUIT. BE CAREFUL.

COLD

T2200

IC2250

IC2201

IC2202

IC2301

IC2300

IC2101

IC2402

IC2401

PO

WER

TRANSFORMER

FEEDBA

CK

FEEDBA

CK

FEEDBA

CK

ISOLA

T

O

R

ISOLA

T

O

R

ISOLA

T

O

R

ISOLA

T

O

R

T2300

PO

WER

TRANSFORMER

T2400

PO

WER

TRANSFORMER

SHUNT REG.

HO

T

HO

T

PO

WER SUPPL

Y CB

A

CN2100

4

A

C120V

1

A

C120V

1

Vsus

CN2501

IC2100

IC2200

IC2400

IC2501

+5V

PDM501

PLASMA DISPLA

Y

MODULE

IC2500 

(PO

WER MICR

OCONTR

OLLER)

LINE

FIL

TER

L2100

R

Y2100

BRIDGE

RECTIFIER

PO

WER

F

A

CT

OR

CORRECTION

D2101

Q2103,

Q2104

SB-ON

SUS-ON

ADDRESS-ON

RELA

Y

-CONT

ERR

OR

X IN

X OUT

RESET

RESET

4MHz

OSC

X2500

D2500

Q2101,

Q2102

D2104

D2251

D2353

L2103

DRIVE

Q2105,

Q2106,

Q2108

SWITCHING

16

6

2

10

11

17

20

24

18

19

16

2

9

10

12

6

ERR

OR

VR2250

Vsus

ADJ

.

VR2350

Vdata

ADJ

.

1

Vsus

CN2502

1V

D

A

2V

D

A

CN2503

4

+15V

2

+15V

1

+15V

CN2504

13

PANEL-MAIN-ON

12

PS-SOS

CN2506

11

A

C-DET

9

STBY+5V

8

+5V

6

+5V

2

+12V

1

+12V

IC2350

IC2452

SHUNT REG.

IC2450

SHUNT REG.

7

3

7

2

1

+5V SWITCH

+15V SWITCH

+12V REG.

IC2451

Q2452,Q2453

Q2450,Q2451

+16V SWITCH

Q2400,

Q2401,

Q2404 

Q2200

SWITCHING

CONTR

OL

Q2301

+15V REG.

SB-ON2

PS-SOS

P

ANEL-ON

31

SUS-MONIT

OR

32

ADR-MONIT

OR

2

3

6

6

4

2

4

5

14

15

8

9

11

12

SWITCHING

CONTR

OL

WF12

J2144

HOT-GND

J2198

VADD

J2064

DC15V

J2156

CFM

J2176

GND

WF14

WF16

WF13

WF15

D2450

Q2402,

Q2403

SWITCH

Q2109

O

VER

CURRENT

PR

O

TECT

Q2300

SWITCH

Q2302

SW CTL

IC2102

ISOLA

T

O

R

BRIDGE

RECTIFIER

D2107,D2111,

D2112,D2114

F2102

1A/250V

1A  250V

Q2100

Q2350

+5V SWITCHING

Q2500,Q2501

For continued protection against risk of fire, 

replace only with same type  8A, 250V fuse.

CAUTION ! :

ATTENTION :

Utiliser un fusible de rechange de m

ê

me type de  8A, 250V.

8A  250V

CAUTION !

Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.

If Main Fuse (F2100, F2102, F2300, F2400) 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.  

For continued protection against risk of fire, 

replace only with same type  2A, 250V fuse.

CAUTION ! :

ATTENTION :

Utiliser un fusible de rechange de m

ê

me type de  2A, 250V.

2A  250V

NOTE:

The voltage for parts in hot circuit is measured using

hot GND as a common terminal.

BLOCK DIAGRAMS

For continued protection against risk of fire, 

replace only with same type  1A, 250V fuse.

CAUTION ! :

ATTENTION :

Utiliser un fusible de rechange de m

ê

me type de  1A, 250V.

1A  250V