Changhong Electric PF2939, Service Manual, Page: 40 / 47

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
and hold down
the MUTE button on the remote control
for 2 second then press
MENU button on the TV
.
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
2.1 Adjustment and option data in S mode
Symbol Adjustment Description
OP1 17 3 Option byte 1
（
See “Option bit set”
）
OP2 7 Option byte 2
（
See “Option bit set”
）
OP3
129 Option byte 3
（
See “Option bit set”
）
OP4 14 3 Option byte 4
（
See “Option bit set”
）
OP5
137 Option byte 5
（
See “Option bit set”
）
OP6
175 Option byte 6
（
See “Option bit set”
）
OP7
175 Option byte 7
（
See “Option bit set”
）
OP8 234 Option byte 8
（
See “Option bit set”
）
6 PAR Set to optimum Parallelogram correction 60Hz
6 BOW Set to optimum Bow correction 60Hz
6 HSH Set to optimum Horizontal shift 60Hz
6 EWW Set to optimum East-west width adjustment 60Hz
6 EWP Set to optimum East-west pincushion correction 60Hz
6 UCR Set to optimum Upper corner correction 60Hz
6 LCR Set to optimum Lower corner correction 60Hz
6 EWT Set to optimum East-west trapezoidal correction 60Hz
6 VSL Set to optimum Half frame vertical 60Hz
6 VAM Set to optimum Frame amplitude 60Hz
6 SCL Set to optimum Frame linearity 60Hz
6 VSH Set to optimum Frame center 60Hz
6 VOF Set to optimum Vertical position of character 60Hz
6 CCV Set to optimum Vertical position of CCD 60Hz
6 HOF Set to optimum Horizontal position of character 60Hz
6 CCHF Set to optimum Horizontal position of CCD 60Hz
VX 25 16:9 mode
RED Set to optimum Red gun cutoff voltage
GRN Set to optimum Green gun cutoff voltage
(Continued)
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