SERVICE MANUAL FOR M35&36; CHASSIS

TCL
decay time: 37 ms
Chassis M35&36 Service Manual
1.6. SCART Signal Routing
1.6.1. SCART DSP In and SCART Out Select
The SCART DSP Input Select and SCART Output Select blocks include full matrix switching facilities. To
design a TV set with two pairs of SCART-inputs and one pair of SCART-outputs, no external switching
hardware is required. The switches are controlled by the ACB user register.
1.6.2. Stand-by Mode
If the MSP 34x5G is switched off by first pulling STANDBYQ low and then (after >1⎧s delay) switching
off DVSUP and AVSUP, but keeping AHVSUP
(‘Stand-by’-mode), the SCART switches maintain their position and function. This allows the copying
from selected SCART-inputs to SCART-outputs in the TV set’s stand-by mode.
In case of power on or starting from stand-by (switching on the DVSUP and AVSUP, RESETQ going high
2 ms later), all internal registers except the ACB register are reset to the default configuration .The reset position
of the ACB register becomes active after the first I 2 C transmission into the Baseband Processing part. By
transmitting the ACB register first, the reset state can be redefined.
Pin Connections and Short Descriptions
NC = not connected; leave vacant
LV = if not used, leave vacant
DVSS: if not used, connect to DVSS
X = obligatory; connect as described in circuit diagram
AHVSS: connect to AHVSS
No. Pin Name Pin No. Type
Connection
(if not used)
Short Description
1 TP 1 LV Test pin
2 NC 2 LV Not connected
3 D_CTR_I/O_1 3 IN/OUT LV D_CTR_I/O_1
4 D_CTR_I/O_0 4 IN/OUT LV D_CTR_I/O_0
5 ADR_SEL 5 IN X I 2 C Bus address select
6 STANDBYQ 6 IN X Standby (low-active)
7 I2C_CL 7 IN/OUT X I 2 C clock
8 I2C_DA 8 IN/OUT X I 2 C data
9 I2C_CL 9 LV I 2 C clock
10 I2C_WS 10 LV I 2 C word strobe
11 I2C_DA_OUT 11 LV I 2 C data output
12 I2C_DA_IN1 12 LV I 2 C data input
13 ADR_DA 13 LV ADR data output
14 ADR_WS 14 LV ADR word strobe
15 ADR_CL 15 LV ADR clock
16 DVSUP 16 X Digital power supply +5V
17 DVSS 17 X Digital ground
18 I2C_DA_IN2 18 LV I 2 C2-data input
19 NC 19 LV Not connected
20 RESETQ 20 IN X Power-on-reset
21 NC 21 LV Not connected
22 NC 22 LV Not connected
23 VREF2 23 X
Reference ground 2
high-voltage part
24 DACM_R 24 OUT LV Loudspeaker out, right
25 DACM_L 25 OUT LV Loudspeaker out, left
26 NC 26 LV Not connected
27 NC 27 LV Not connected
28 NC 28 LV Not connected
31 03.Mar.2003