Apex Digital PF2720 User manual

FILE NO. SM-CTV-O-056
COLOR TELEVISION
SERVICE MANUAL
MODEL NO. PF2720/PF2730
PF3220/PF3230
CHASSIS NO. CH-16CD
Please read this manual carefully before service.

SERVICE MANUAL
Service Mode and Bus Data
1. How to Enter the Service Mode with the Remote Control
1) Decrease volume to 0.
2) Press the MUTE button on the remote control and VIDEO button on the TV at the same time.
3) Adjust the TV with the MENU SELECT buttons on the remote control.
4) Press the button on the remote control to quit the Service mode.
2. Bus Data
Symbol Adjustment Description
OP1 190 Option bit 1˄See “Option Set”˅OP2 15 Option bit 2˄See “Option Set”˅OP3 1Option bit 3˄See “Option Set”˅OP4 221 Option bit 4˄See “Option Set”˅OP5 140 Option bit 5˄See “Option Set”˅OP6 111 Option bit 6˄See “Option Set”˅OP7 191 Option bit 7˄See “Option Set”˅S0
OP8 101 Option bit 8˄See “Option Set”˅PAR Set to optimum Parallelogram correction
BOW Set to optimum Bow correction
HSH Set to optimum Horizontal shift
EWW Set to optimum East-west width adjustment
EWP Set to optimum East-west pincushion correction
UCR Set to optimum Upper corner correction
LCR Set to optimum Lower corner correction
S1
EWT Set to optimum East-west Trapezoidal correction
VSL Set to optimum Half vertical output
VAM Set to optimum Vertical amplitude
SCL Set to optimum Vertical linearity
VSH Set to optimum Vertical shift
VOF Set to optimum Vertical position of character
CCV Set to optimum Vertical position of CCD
HOF Set to optimum Horizontal position of character
S2
CCHF Set to optimum Horizontal position of CCD
VX 25
RED Set to optimum Red gun cutoff voltage
GRN Set to optimum Green gun cutoff voltage
WPR Set to optimum Red gun drive voltage
WPG Set to optimum Green gun drive voltage
S3
WPB Set to optimum Blue gun drive voltage
(Continued)
41

SERVICE MANUAL
YDFN 7 Luminance delay
TOP Set to optimum Video automatic gain control
VOL 31 UOC volume control
IFFS 1 Picture intermediate frequency
HDOL 13 Cathode drive voltage
HD-B 3 Brightness of blue back
AGC 2 Automatic gain control velocity
VG2B 32
FEAT 57 See “Option Set”.
S4
FEAT1 56 See “Option Set”.
TRE1 100 Treble Max.
TRE2 50 Treble Mid.
BAS1 60 Bass Max.
BAS2 30 Bass Mid.
1CON 80 Contrast in Normal mode
1BRI 50 Brightness in Normal mode
1COL 50 Color in Normal mode
S5
1SHP 50 Sharpness in Normal mode
2CON 100 Contrast in Movie mode
2BRI 40 Brightness in Movie mode
2COL 60 Color in Movie mode
2SHP 60 Sharpness in Movie mode
3CON 100 Contrast in Sports mode
3BRI 60 Brightness in Sports mode
3COL 40 Color in Sports mode
S6
3SHP 40 Sharpness in Sports mode
PP H 0
IFOF Set to optimum IF offset
VENH 1 Vertical enhancement
S7
COR 3 Coring
VOLA 70 Volume 25
VOLB 80 Volume 50
VOLC 90 Volume 75
VOLD 100 Volume 100
WFRA 70 Woofer 25
WFRB 80 Woofer 50
WFRC 90 Woofer 75
S8
WFRD 100 Woofer 100
SAGC 0 Sound AGC
LOUD 40 1KHz(or 2KHz) sound AGC
S9
SCOT 107 AV output volume
(Continued)
42

SERVICE MANUAL
SCIN 61 AV input volume
FMIN 63 Sound frequency modulation
WOCF 15 Woofer Mid.
CON1 100 Contrast Max.
CON2 50 Contrast Min.
BRI1 Set to optimum Brightness Max.
BRI2 Set to optimum Brightness Min.
COL1 100 Color Max.
COL2 50 Color Min.
SHP1 80 Sharpness Max.
SAV
SHP2 40 Sharpness Min.
Notes:
ķĀ5āor Ā6āwill be displayed before the data depending on signal frequency (50Hz or 60Hz)
during geometric data adjustment.
ĸThe data sheet may differ dependent on different models.
ĹThe data sheet may differ dependent on different CRTs for the same model.
3. Option Set
Bit Item Description Default
0 TA1343N Sound processor TA1343N: 1ėYes, 0ėNo 0
1 MSP3440G MSP3440G: 1ėYes, 0ėNo 1
2 IDENT_TXT12 1ėTXT12 IDENT detection, 0ėSL IDENT detection 1
3 COMB_FILTER TC90A49P: 1ėYes, 0ėNo 1
4 OP_X_RAY X-Ray protection: 1ėYes, 0ėNo 1
5 UOC_SVM TDA9379-VM: 1ėYes, 0ėNo 1
6 TDA9859 Sound processing chip TDA9859: 1ėYes, 0ėNo 0
OP1
7 SOUND_CHIP Sound processing chip: 1ėYes, 0ėNo (PWM control) 1
0 TV_29_21 Definition of UOC pin: 1ė29”, 0ė21” 1
1 VCHIP V-chip: 1ėYes, 0ėNo 1
2 CCD Closed Caption: 1ėYes, 0ėNo 1
3SOUND_EFFE
CT
Audio options: 1ėYes, 0ėNo 1
4OP-ZOOM-DE
LE-LINE
ZOOM detection˖1ėNo, 0ėYes 0
5 0
6 0
OP2
7 OP-LOGO User LOGO display: 1ėYes under no signal condition,
0ėNo
0
0 BLUE_BACK Blue back under no signal condition: 1ėYes, 0ėNo 1
1 VM_OSD 1ėDependent on OSD MENU, 0ėIndependent on
OSD
0
2 TILT Tilt: 1ėYes, 0ėNo 0
OP3
3WOOFER_ON
OFF
Super woofer: 1ėYes, 0ėNo 0
(Continued)
43

SERVICE MANUAL
4 WOOFER_VOL Super woofer volume control: 1ėYes, 0ėNo 0
5 0
6 0
7 OP-TIMER TIMER: 1ėYes, 0ėNo 0
0 ENGLISH English: 1ėYes, 0ėNo 1
1 PORTUGUESE Portuguese: 1ėYes, 0ėNo 0
2 FRENCH French: 1ėYes, 0ėNo 1
3 SPANISH Spanish: 1ėYes, 0ėNo 1
4MSP3440G
-AVC
Auto volume control: 1ėYes, 0ėNo 1
5MSP3440G-
MDB
MDB: 1ėYes, 0ėNo 0
6MSP3440G-
TONE
Five equalizer: 1ėYes, 0ėNo 1
OP4
7MSP3440G
_GAIN
Frequency gain enhancement: 1ė1KHz, 0ė2KHz 1
0 PAL_M_N PAL M /PAL N: 1ėYes, 0ėNo 0
1Power-on
degaussing
1ė4 seconds, 0ėEvery 0
2 AV_STEREO AV Stereo: 1ėYes, 0ėNo 1
316˖9 16 : 9: 1ėYes, 0ėNo 1
4 LOCK_MENU LOCK_MENU 1ėYes, 0ėNo 0
5 BSCREEN Black screen when changing channels: 1ėYes, 0ėNo
0
6 WOOFER_MAI
N
Woofer available on main channel1(343): 1ėYes, 0ėNo
0
OP5
7 CHANNELLAB
EL
Channel label: 1ėYes, 0ėNo 1
0 FMWS FM-PLL window: 1ėLarge, 0ėSmall 1
1 FSL Vertical sync: 1ė60%, 0ėNoise detector 1
2 OSO Switch off: 1ėOverscan, 0ėUndefined 1
3 YPRPB YPbPr selection: 1ėYes, 0ėNo 1
4 VG2_MODE VG2 adjustment: 1ėUOC H, 0ėUOC I 0
5 SYNC_Y DVD sync separately: 1ėYes, 0ėNo 1
6 QSS 1ėQSS, 0ėFM 1
OP6
7 0
0 AV2 AV2: 1ėYes, 0ėNo 1
1 AV3 AV3: 1ėYes, 0ėNo 1
2 AV4 AV4: 1ėYes, 0ėNo 1
3 SVHS1 SVHS1: 1ėYes, 0ėNo 1
4 SVHS4 SVHS4: 1ėYes, 0ėNo 1
5 DVD DVD: 1ėYes, 0ėNo 1
OP7
6LAST_SOURC
E
Turn-on mode after power-on: 1 ėTV, 0 ėLast
program source
0
(Continued)
44

SERVICE MANUAL
7 STANDBY Standby mode after power-on: 1ėStandby, 0ėThe
same as last power-off mode
1
0 VM Velocity modulation: 1ėYes, 0ėNo 1
1 LOCK Lock used for identifying detection: 1ėYes, 0ėNo 0
2 IDENT_MODE Lock handle: 1ėTXT12 | Lock; 0ėTXT12 & Lock 0
3COLOR
MATRIX
Matrix: 1ėUSA; 0 ėJapan 0
4 FORF 0
5 FORS
F/S 00ėAUTO 60 01ė60 FORCED
10ėAUTO LAST 11ėAUTO 50 1
6 CHILD_LOCK Child lock: 1ėYes, 0ėNo 1
OP8
7 SPEAKER Speaker On/Off: 1ėYes, 0ėNo 0
0 BKS Black level stretch 1
1 0 0
2 0 0
3 DSK Skin tone correction 1
4 COR0 1
5 COR1
Dynamic coring: 00ėOff 11ėMax.
1
6 SVM0 0
FEA
T
7 SVM1
TDA9379 VM delay 00ė50 01ė70
10ė90 11ėSpare 0
0 0 0
1 0 0
2 VAM0 0
3 VAM1
TDA9379 VM amplitude: 00ėOFF 01ė0.8V
10ė1.2V 11ė1.8V 1
4 RPO0 1
5 RPO1
Over pulse/preset pulse 00(1:1) 01(1:1.25)
10(1:1.5) 11(1:1.8) 1
6 0 0
FEA
T1
7 0 0
Notes:
ķThe option data in the above table may differ depending on models, UOC chips and CRTs
used.
ĸIt is required to check if the data comply with the function requirements of your TVs.
For example:
③For PF2720 and PF3220 models, OP1 is set to 158, OP7 to 175 and OP8 to 100 when using
TDA9375 or OP1 is set to 158, OP7 to 175 and OP8 to 100 when using TDA9379.
For PF2730 and PF3230 models, OP1 is set to 158, OP7 to 191 and OP8 to 101 when using
TDA9375 or OP1 is set to 190, OP7 to 191 and OP8 to 101 when using TDA9379.
45